/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.basic.security.widget.hlistview;
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import android.annotation.TargetApi;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.os.Build;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.util.AttributeSet;
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import android.view.ContextMenu;
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import android.view.ContextMenu.ContextMenuInfo;
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import android.view.Gravity;
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import android.view.SoundEffectConstants;
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import android.view.View;
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import android.view.accessibility.AccessibilityEvent;
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import android.view.accessibility.AccessibilityNodeInfo;
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import android.widget.ExpandableListAdapter;
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import android.widget.ListAdapter;
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import com.basic.security.utils.RUtils;
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import java.util.ArrayList;
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/**
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* A view that shows items in a vertically scrolling two-level list. This
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* differs from the {@link HListView} by allowing two levels: groups which can
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* individually be expanded to show its children. The items come from the
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* {@link android.widget.ExpandableListAdapter} associated with this view.
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* <p/>
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* Expandable lists are able to show an indicator beside each item to display
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* the item's current state (the states are usually one of expanded group,
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* collapsed group, child, or last child). Use
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* {@link #setChildIndicator(Drawable)} or {@link #setGroupIndicator(Drawable)}
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* (or the corresponding XML attributes) to set these indicators (see the docs
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* for each method to see additional state that each Drawable can have). The
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* default style for an {@link ExpandableHListView} provides indicators which
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* will be shown next to Views given to the {@link ExpandableHListView}. The
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* layouts android.com.basic.security.utils.ResolutionAdaptation.simple_expandable_list_item_1 and
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* android.com.basic.security.utils.ResolutionAdaptation.simple_expandable_list_item_2 (which should be used with
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* {@link android.widget.SimpleCursorTreeAdapter}) contain the preferred position information
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* for indicators.
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* <p/>
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* The context menu information set by an {@link ExpandableHListView} will be a
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* {@link ExpandableListContextMenuInfo} object with
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* {@link ExpandableListContextMenuInfo#packedPosition} being a packed position
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* that can be used with {@link #getPackedPositionType(long)} and the other
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* similar methods.
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* <p/>
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* <em><b>Note:</b></em> You cannot use the value <code>wrap_content</code>
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* for the <code>android:layout_height</code> attribute of a
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* ExpandableListView in XML if the parent's size is also not strictly specified
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* (for example, if the parent were ScrollView you could not specify
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* wrap_content since it also can be any length. However, you can use
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* wrap_content if the ExpandableListView parent has a specific size, such as
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* 100 pixels.
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*
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* @attr ref android.R.styleable#ExpandableListView_groupIndicator
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* @attr ref android.R.styleable#ExpandableListView_indicatorLeft
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* @attr ref android.R.styleable#ExpandableListView_indicatorRight
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* @attr ref android.R.styleable#ExpandableListView_childIndicator
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* @attr ref android.R.styleable#ExpandableListView_childIndicatorLeft
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* @attr ref android.R.styleable#ExpandableListView_childIndicatorRight
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* @attr ref android.R.styleable#ExpandableListView_childDivider
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* @attr ref android.R.styleable#ExpandableListView_indicatorStart
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* @attr ref android.R.styleable#ExpandableListView_indicatorEnd
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* @attr ref android.R.styleable#ExpandableListView_childIndicatorStart
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* @attr ref android.R.styleable#ExpandableListView_childIndicatorEnd
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*/
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public class ExpandableHListView extends HListView {
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/**
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* The packed position represents a group.
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*/
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public static final int PACKED_POSITION_TYPE_GROUP = 0;
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/**
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* The packed position represents a child.
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*/
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public static final int PACKED_POSITION_TYPE_CHILD = 1;
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/**
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* The packed position represents a neither/null/no preference.
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*/
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public static final int PACKED_POSITION_TYPE_NULL = 2;
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/**
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* The value for a packed position that represents neither/null/no
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* preference. This value is not otherwise possible since a group type
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* (first bit 0) should not have a child position filled.
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*/
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public static final long PACKED_POSITION_VALUE_NULL = 0x00000000FFFFFFFFL;
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/**
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* Denotes when a child indicator should inherit this bound from the generic
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* indicator bounds
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*/
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public static final int CHILD_INDICATOR_INHERIT = -1;
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/**
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* The mask (in packed position representation) for the child
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*/
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private static final long PACKED_POSITION_MASK_CHILD = 0x00000000FFFFFFFFL;
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/**
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* The mask (in packed position representation) for the group
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*/
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private static final long PACKED_POSITION_MASK_GROUP = 0x7FFFFFFF00000000L;
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/**
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* The mask (in packed position representation) for the type
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*/
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private static final long PACKED_POSITION_MASK_TYPE = 0x8000000000000000L;
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/**
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* The shift amount (in packed position representation) for the group
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*/
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private static final long PACKED_POSITION_SHIFT_GROUP = 32;
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/**
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* The shift amount (in packed position representation) for the type
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*/
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private static final long PACKED_POSITION_SHIFT_TYPE = 63;
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/**
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* The mask (in integer child position representation) for the child
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*/
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private static final long PACKED_POSITION_INT_MASK_CHILD = 0xFFFFFFFF;
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/**
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* The mask (in integer group position representation) for the group
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*/
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private static final long PACKED_POSITION_INT_MASK_GROUP = 0x7FFFFFFF;
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/**
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* Denotes an undefined value for an indicator
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*/
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private static final int INDICATOR_UNDEFINED = -2;
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private static final int[] EMPTY_STATE_SET = {};
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/**
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* State indicating the group is expanded.
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*/
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private static final int[] GROUP_EXPANDED_STATE_SET = {android.R.attr.state_expanded};
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/**
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* State indicating the group is empty (has no children).
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*/
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private static final int[] GROUP_EMPTY_STATE_SET = {android.R.attr.state_empty};
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/**
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* State indicating the group is expanded and empty (has no children).
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*/
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private static final int[] GROUP_EXPANDED_EMPTY_STATE_SET = {android.R.attr.state_expanded, android.R.attr.state_empty};
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/**
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* States for the group where the 0th bit is expanded and 1st bit is empty.
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*/
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private static final int[][] GROUP_STATE_SETS = {EMPTY_STATE_SET, // 00
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GROUP_EXPANDED_STATE_SET, // 01
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GROUP_EMPTY_STATE_SET, // 10
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GROUP_EXPANDED_EMPTY_STATE_SET // 11
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};
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/**
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* State indicating the child is the last within its group.
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*/
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private static final int[] CHILD_LAST_STATE_SET = {android.R.attr.state_last};
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// Bounds of the indicator to be drawn
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private final Rect mIndicatorRect = new Rect();
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private final Rect mTempRect = new Rect();
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/**
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* Serves as the glue/translator between a ListView and an ExpandableListView
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*/
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private ExpandableHListConnector mConnector;
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/**
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* Gives us Views through group+child positions
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*/
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private ExpandableListAdapter mAdapter;
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/**
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* Left bound for drawing the indicator.
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*/
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private int mIndicatorTop;
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/**
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* Right bound for drawing the indicator.
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*/
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private int mIndicatorLeft;
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/**
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* Group indicator gravity
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*/
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private int mIndicatorGravity;
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/**
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* Child indicator gravity
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*/
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private int mChildIndicatorGravity;
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private int mChildIndicatorTop;
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private int mChildIndicatorLeft;
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/**
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* The indicator drawn next to a group.
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*/
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private Drawable mGroupIndicator;
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/**
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* The indicator drawn next to a child.
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*/
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private Drawable mChildIndicator;
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/**
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* Drawable to be used as a divider when it is adjacent to any children
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*/
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private Drawable mChildDivider;
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private int mGroupIndicatorWidth;
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private int mGroupIndicatorHeight;
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private int mChildIndicatorWidth;
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private int mChildIndicatorHeight;
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private OnGroupCollapseListener mOnGroupCollapseListener;
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private OnGroupExpandListener mOnGroupExpandListener;
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private OnGroupClickListener mOnGroupClickListener;
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private OnChildClickListener mOnChildClickListener;
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public ExpandableHListView(Context context) {
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this(context, null);
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}
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public ExpandableHListView(Context context, AttributeSet attrs) {
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this(context, attrs, RUtils.R_attr_hlv_expandableListViewStyle);
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}
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public ExpandableHListView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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TypedArray a = context.obtainStyledAttributes(attrs, com.basic.security.utils.RUtils.R_styleable_ExpandableHListView, defStyle, 0);
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setGroupIndicator(a.getDrawable(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_groupIndicator));
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setChildIndicator(a.getDrawable(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_childIndicator));
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mIndicatorLeft = a.getDimensionPixelSize(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_indicatorPaddingLeft, 0);
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mIndicatorTop = a.getDimensionPixelSize(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_indicatorPaddingTop, 0);
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mIndicatorGravity = a.getInt(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_indicatorGravity, Gravity.NO_GRAVITY);
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mChildIndicatorGravity = a.getInt(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_childIndicatorGravity, Gravity.NO_GRAVITY);
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mChildIndicatorLeft = a.getDimensionPixelSize(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_childIndicatorPaddingLeft, 0);
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mChildIndicatorTop = a.getDimensionPixelSize(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_childIndicatorPaddingTop, 0);
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mChildDivider = a.getDrawable(com.basic.security.utils.RUtils.R_styleable_ExpandableHListView_hlv_childDivider);
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a.recycle();
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}
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/**
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* Gets the type of a packed position. See
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* {@link #getPackedPositionForChild(int, int)}.
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*
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* @param packedPosition The packed position for which to return the type.
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* @return The type of the position contained within the packed position,
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* either {@link #PACKED_POSITION_TYPE_CHILD}, {@link #PACKED_POSITION_TYPE_GROUP}, or
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* {@link #PACKED_POSITION_TYPE_NULL}.
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*/
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public static int getPackedPositionType(long packedPosition) {
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if (packedPosition == PACKED_POSITION_VALUE_NULL) {
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return PACKED_POSITION_TYPE_NULL;
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}
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return (packedPosition & PACKED_POSITION_MASK_TYPE) == PACKED_POSITION_MASK_TYPE ? PACKED_POSITION_TYPE_CHILD : PACKED_POSITION_TYPE_GROUP;
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}
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/**
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* Gets the group position from a packed position. See
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* {@link #getPackedPositionForChild(int, int)}.
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*
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* @param packedPosition The packed position from which the group position
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* will be returned.
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* @return The group position portion of the packed position. If this does
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* not contain a group, returns -1.
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*/
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public static int getPackedPositionGroup(long packedPosition) {
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// Null
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if (packedPosition == PACKED_POSITION_VALUE_NULL) return -1;
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return (int) ((packedPosition & PACKED_POSITION_MASK_GROUP) >> PACKED_POSITION_SHIFT_GROUP);
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}
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/**
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* Gets the child position from a packed position that is of
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* {@link #PACKED_POSITION_TYPE_CHILD} type (use {@link #getPackedPositionType(long)}).
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* To get the group that this child belongs to, use
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* {@link #getPackedPositionGroup(long)}. See
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* {@link #getPackedPositionForChild(int, int)}.
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*
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* @param packedPosition The packed position from which the child position
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* will be returned.
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* @return The child position portion of the packed position. If this does
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* not contain a child, returns -1.
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*/
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public static int getPackedPositionChild(long packedPosition) {
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// Null
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if (packedPosition == PACKED_POSITION_VALUE_NULL) return -1;
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// Group since a group type clears this bit
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if ((packedPosition & PACKED_POSITION_MASK_TYPE) != PACKED_POSITION_MASK_TYPE) return -1;
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return (int) (packedPosition & PACKED_POSITION_MASK_CHILD);
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}
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/**
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* Returns the packed position representation of a child's position.
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* <p/>
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* In general, a packed position should be used in
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* situations where the position given to/returned from an
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* {@link ExpandableListAdapter} or {@link ExpandableHListView} method can
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* either be a child or group. The two positions are packed into a single
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* long which can be unpacked using
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* {@link #getPackedPositionChild(long)},
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* {@link #getPackedPositionGroup(long)}, and
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* {@link #getPackedPositionType(long)}.
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*
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* @param groupPosition The child's parent group's position.
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* @param childPosition The child position within the group.
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* @return The packed position representation of the child (and parent group).
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*/
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public static long getPackedPositionForChild(int groupPosition, int childPosition) {
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return (((long) PACKED_POSITION_TYPE_CHILD) << PACKED_POSITION_SHIFT_TYPE) |
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((((long) groupPosition) & PACKED_POSITION_INT_MASK_GROUP) << PACKED_POSITION_SHIFT_GROUP) | (childPosition & PACKED_POSITION_INT_MASK_CHILD);
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}
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/**
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* Returns the packed position representation of a group's position. See
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* {@link #getPackedPositionForChild(int, int)}.
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*
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* @param groupPosition The child's parent group's position.
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* @return The packed position representation of the group.
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*/
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public static long getPackedPositionForGroup(int groupPosition) {
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// No need to OR a type in because PACKED_POSITION_GROUP == 0
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return ((((long) groupPosition) & PACKED_POSITION_INT_MASK_GROUP) << PACKED_POSITION_SHIFT_GROUP);
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}
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public void onRtlPropertiesChanged(int layoutDirection) {
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resolveIndicator();
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resolveChildIndicator();
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}
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/**
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* Resolve start/end indicator. start/end indicator always takes precedence over left/right
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* indicator when defined.
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*/
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private void resolveIndicator() {
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if (null != mGroupIndicator) {
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mGroupIndicatorWidth = mGroupIndicator.getIntrinsicWidth();
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mGroupIndicatorHeight = mGroupIndicator.getIntrinsicHeight();
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} else {
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mGroupIndicatorWidth = 0;
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mGroupIndicatorHeight = 0;
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}
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}
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/**
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* Resolve start/end child indicator. start/end child indicator always takes precedence over
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* left/right child indicator when defined.
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*/
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private void resolveChildIndicator() {
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if (null != mChildIndicator) {
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mChildIndicatorWidth = mChildIndicator.getIntrinsicWidth();
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mChildIndicatorHeight = mChildIndicator.getIntrinsicHeight();
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} else {
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mChildIndicatorWidth = 0;
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mChildIndicatorHeight = 0;
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}
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}
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protected void dispatchDraw(Canvas canvas) {
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// Draw children, etc.
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super.dispatchDraw(canvas);
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// If we have any indicators to draw, we do it here
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if ((mChildIndicator == null) && (mGroupIndicator == null)) {
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return;
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}
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int saveCount = 0;
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final int headerViewsCount = getHeaderViewsCount();
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final int lastChildFlPos = mItemCount - getFooterViewsCount() - headerViewsCount - 1;
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final int myRight = getRight();
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ExpandableHListConnector.PositionMetadata pos;
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View item;
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Drawable indicator;
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int left, right;
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// Start at a value that is neither child nor group
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int lastItemType = ~(ExpandableHListPosition.CHILD | ExpandableHListPosition.GROUP);
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final Rect indicatorRect = mIndicatorRect;
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// The "child" mentioned in the following two lines is this
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// View's child, not referring to an expandable list's
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// notion of a child (as opposed to a group)
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final int childCount = getChildCount();
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for (int i = 0, childFlPos = mFirstPosition - headerViewsCount; i < childCount; i++, childFlPos++) {
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if (childFlPos < 0) {
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// This child is header
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continue;
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} else if (childFlPos > lastChildFlPos) {
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// This child is footer, so are all subsequent children
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break;
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}
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item = getChildAt(i);
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left = item.getLeft();
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right = item.getRight();
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// This item isn't on the screen
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if ((right < 0) || (left > myRight)) continue;
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// Get more expandable list-related info for this item
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pos = mConnector.getUnflattenedPos(childFlPos);
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// If this item type and the previous item type are different, then we need to change
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// the left & right bounds
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if (pos.position.type != lastItemType) {
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if (pos.position.type == ExpandableHListPosition.CHILD) {
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indicatorRect.top = item.getTop() + mChildIndicatorTop;
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indicatorRect.bottom = item.getBottom() + mChildIndicatorTop;
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} else {
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indicatorRect.top = item.getTop() + mIndicatorTop;
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indicatorRect.bottom = item.getBottom() + mIndicatorTop;
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}
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lastItemType = pos.position.type;
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}
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if (indicatorRect.top != indicatorRect.bottom) {
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if (pos.position.type == ExpandableHListPosition.CHILD) {
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indicatorRect.left = left + mChildIndicatorLeft;
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indicatorRect.right = right + mChildIndicatorLeft;
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} else {
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indicatorRect.left = left + mIndicatorLeft;
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indicatorRect.right = right + mIndicatorLeft;
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}
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// Get the indicator (with its state set to the item's state)
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indicator = getIndicator(pos);
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if (indicator != null) {
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if (pos.position.type == ExpandableHListPosition.CHILD) {
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Gravity.apply(mChildIndicatorGravity, mChildIndicatorWidth, mChildIndicatorHeight, indicatorRect, mTempRect);
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} else {
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Gravity.apply(mIndicatorGravity, mGroupIndicatorWidth, mGroupIndicatorHeight, indicatorRect, mTempRect);
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}
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// Draw the indicator
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indicator.setBounds(mTempRect);
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indicator.draw(canvas);
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}
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}
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pos.recycle();
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}
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}
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/**
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* Gets the indicator for the item at the given position. If the indicator
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* is stateful, the state will be given to the indicator.
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*
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* @param pos The flat list position of the item whose indicator
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* should be returned.
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* @return The indicator in the proper state.
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*/
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private Drawable getIndicator(ExpandableHListConnector.PositionMetadata pos) {
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Drawable indicator;
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if (pos.position.type == ExpandableHListPosition.GROUP) {
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indicator = mGroupIndicator;
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if (indicator != null && indicator.isStateful()) {
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// Empty check based on availability of data. If the groupMetadata isn't null,
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// we do a check on it. Otherwise, the group is collapsed so we consider it
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// empty for performance reasons.
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boolean isEmpty = (pos.groupMetadata == null) || (pos.groupMetadata.lastChildFlPos == pos.groupMetadata.flPos);
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final int stateSetIndex = (pos.isExpanded() ? 1 : 0) | // Expanded?
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(isEmpty ? 2 : 0); // Empty?
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indicator.setState(GROUP_STATE_SETS[stateSetIndex]);
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}
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} else {
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indicator = mChildIndicator;
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if (indicator != null && indicator.isStateful()) {
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// No need for a state sets array for the child since it only has two states
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final int stateSet[] = pos.position.flatListPos == pos.groupMetadata.lastChildFlPos ? CHILD_LAST_STATE_SET : EMPTY_STATE_SET;
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indicator.setState(stateSet);
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}
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}
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return indicator;
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}
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/**
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* Sets the drawable that will be drawn adjacent to every child in the list. This will
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* be drawn using the same height as the normal divider ({@link #setDivider(Drawable)}) or
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* if it does not have an intrinsic height, the height set by {@link #setDividerWidth(int)}.
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*
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* @param childDivider The drawable to use.
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*/
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public void setChildDivider(Drawable childDivider) {
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mChildDivider = childDivider;
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}
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void drawDivider(Canvas canvas, Rect bounds, int childIndex) {
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int flatListPosition = childIndex + mFirstPosition;
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// Only proceed as possible child if the divider isn't above all items (if it is above
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// all items, then the item below it has to be a group)
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if (flatListPosition >= 0) {
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final int adjustedPosition = getFlatPositionForConnector(flatListPosition);
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ExpandableHListConnector.PositionMetadata pos = mConnector.getUnflattenedPos(adjustedPosition);
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// If this item is a child, or it is a non-empty group that is expanded
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if ((pos.position.type == ExpandableHListPosition.CHILD) || (pos.isExpanded() && pos.groupMetadata.lastChildFlPos != pos.groupMetadata.flPos)) {
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// These are the cases where we draw the child divider
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final Drawable divider = mChildDivider;
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divider.setBounds(bounds);
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divider.draw(canvas);
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pos.recycle();
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return;
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}
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pos.recycle();
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}
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// Otherwise draw the default divider
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super.drawDivider(canvas, bounds, flatListPosition);
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}
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/**
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* This method should not be used, use {@link #getExpandableListAdapter()}.
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*/
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public ListAdapter getAdapter() {
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/*
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* The developer should never really call this method on an
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* ExpandableListView, so it would be nice to throw a RuntimeException,
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* but AdapterView calls this
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*/
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return super.getAdapter();
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}
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/**
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* Sets the adapter that provides data to this view.
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*
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* @param adapter The adapter that provides data to this view.
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*/
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public void setAdapter(ExpandableListAdapter adapter) {
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// Set member variable
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mAdapter = adapter;
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if (adapter != null) {
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// Create the connector
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mConnector = new ExpandableHListConnector(adapter);
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} else {
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mConnector = null;
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}
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// Link the ListView (superclass) to the expandable list data through the connector
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super.setAdapter(mConnector);
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}
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/**
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* This overloaded method should not be used, instead use
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* {@link #setAdapter(ExpandableListAdapter)}.
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* <p/>
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* {@inheritDoc}
|
*/
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public void setAdapter(ListAdapter adapter) {
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throw new RuntimeException("For ExpandableListView, use setAdapter(ExpandableListAdapter) instead of " + "setAdapter(ListAdapter)");
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}
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/**
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* Register a callback to be invoked when an item has been clicked and the
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* caller prefers to receive a ListView-style position instead of a group
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* and/or child position. In most cases, the caller should use
|
* {@link #setOnGroupClickListener} and/or {@link #setOnChildClickListener}.
|
* <p/>
|
* {@inheritDoc}
|
*/
|
public void setOnItemClickListener(OnItemClickListener l) {
|
super.setOnItemClickListener(l);
|
}
|
|
/**
|
* Gets the adapter that provides data to this view.
|
*
|
* @return The adapter that provides data to this view.
|
*/
|
public ExpandableListAdapter getExpandableListAdapter() {
|
return mAdapter;
|
}
|
|
/**
|
* @param position An absolute (including header and footer) flat list position.
|
* @return true if the position corresponds to a header or a footer item.
|
*/
|
private boolean isHeaderOrFooterPosition(int position) {
|
final int footerViewsStart = mItemCount - getFooterViewsCount();
|
return (position < getHeaderViewsCount() || position >= footerViewsStart);
|
}
|
|
/**
|
* Converts an absolute item flat position into a group/child flat position, shifting according
|
* to the number of header items.
|
*
|
* @param flatListPosition The absolute flat position
|
* @return A group/child flat position as expected by the connector.
|
*/
|
private int getFlatPositionForConnector(int flatListPosition) {
|
return flatListPosition - getHeaderViewsCount();
|
}
|
|
/**
|
* Converts a group/child flat position into an absolute flat position, that takes into account
|
* the possible headers.
|
*
|
* @param flatListPosition The child/group flat position
|
* @return An absolute flat position.
|
*/
|
private int getAbsoluteFlatPosition(int flatListPosition) {
|
return flatListPosition + getHeaderViewsCount();
|
}
|
|
public boolean performItemClick(View v, int position, long id) {
|
// Ignore clicks in header/footers
|
if (isHeaderOrFooterPosition(position)) {
|
// Clicked on a header/footer, so ignore pass it on to super
|
return super.performItemClick(v, position, id);
|
}
|
// Internally handle the item click
|
final int adjustedPosition = getFlatPositionForConnector(position);
|
return handleItemClick(v, adjustedPosition, id);
|
}
|
|
/**
|
* This will either expand/collapse groups (if a group was clicked) or pass
|
* on the click to the proper child (if a child was clicked)
|
*
|
* @param position The flat list position. This has already been factored to
|
* remove the header/footer.
|
* @param id The ListAdapter ID, not the group or child ID.
|
*/
|
boolean handleItemClick(View v, int position, long id) {
|
final ExpandableHListConnector.PositionMetadata posMetadata = mConnector.getUnflattenedPos(position);
|
id = getChildOrGroupId(posMetadata.position);
|
boolean returnValue;
|
if (posMetadata.position.type == ExpandableHListPosition.GROUP) {
|
/* It's a group, so handle collapsing/expanding */
|
/* It's a group click, so pass on event */
|
if (mOnGroupClickListener != null) {
|
if (mOnGroupClickListener.onGroupClick(this, v, posMetadata.position.groupPos, id)) {
|
posMetadata.recycle();
|
return true;
|
}
|
}
|
if (posMetadata.isExpanded()) {
|
/* Collapse it */
|
mConnector.collapseGroup(posMetadata);
|
playSoundEffect(SoundEffectConstants.CLICK);
|
if (mOnGroupCollapseListener != null) {
|
mOnGroupCollapseListener.onGroupCollapse(posMetadata.position.groupPos);
|
}
|
} else {
|
/* Expand it */
|
mConnector.expandGroup(posMetadata);
|
playSoundEffect(SoundEffectConstants.CLICK);
|
if (mOnGroupExpandListener != null) {
|
mOnGroupExpandListener.onGroupExpand(posMetadata.position.groupPos);
|
}
|
final int groupPos = posMetadata.position.groupPos;
|
final int groupFlatPos = posMetadata.position.flatListPos;
|
final int shiftedGroupPosition = groupFlatPos + getHeaderViewsCount();
|
smoothScrollToPosition(shiftedGroupPosition + mAdapter.getChildrenCount(groupPos), shiftedGroupPosition);
|
}
|
returnValue = true;
|
} else {
|
/* It's a child, so pass on event */
|
if (mOnChildClickListener != null) {
|
playSoundEffect(SoundEffectConstants.CLICK);
|
return mOnChildClickListener.onChildClick(this, v, posMetadata.position.groupPos, posMetadata.position.childPos, id);
|
}
|
returnValue = false;
|
}
|
posMetadata.recycle();
|
return returnValue;
|
}
|
|
/**
|
* Expand a group in the grouped list view
|
*
|
* @param groupPos the group to be expanded
|
* @return True if the group was expanded, false otherwise (if the group
|
* was already expanded, this will return false)
|
*/
|
public boolean expandGroup(int groupPos) {
|
return expandGroup(groupPos, false);
|
}
|
|
/**
|
* Expand a group in the grouped list view
|
*
|
* @param groupPos the group to be expanded
|
* @param animate true if the expanding group should be animated in
|
* @return True if the group was expanded, false otherwise (if the group
|
* was already expanded, this will return false)
|
*/
|
public boolean expandGroup(int groupPos, boolean animate) {
|
ExpandableHListPosition elGroupPos = ExpandableHListPosition.obtain(ExpandableHListPosition.GROUP, groupPos, -1, -1);
|
ExpandableHListConnector.PositionMetadata pm = mConnector.getFlattenedPos(elGroupPos);
|
elGroupPos.recycle();
|
boolean retValue = mConnector.expandGroup(pm);
|
if (mOnGroupExpandListener != null) {
|
mOnGroupExpandListener.onGroupExpand(groupPos);
|
}
|
if (animate) {
|
final int groupFlatPos = pm.position.flatListPos;
|
final int shiftedGroupPosition = groupFlatPos + getHeaderViewsCount();
|
smoothScrollToPosition(shiftedGroupPosition + mAdapter.getChildrenCount(groupPos), shiftedGroupPosition);
|
}
|
pm.recycle();
|
return retValue;
|
}
|
|
/**
|
* Collapse a group in the grouped list view
|
*
|
* @param groupPos position of the group to collapse
|
* @return True if the group was collapsed, false otherwise (if the group
|
* was already collapsed, this will return false)
|
*/
|
public boolean collapseGroup(int groupPos) {
|
boolean retValue = mConnector.collapseGroup(groupPos);
|
if (mOnGroupCollapseListener != null) {
|
mOnGroupCollapseListener.onGroupCollapse(groupPos);
|
}
|
return retValue;
|
}
|
|
public void setOnGroupCollapseListener(
|
OnGroupCollapseListener onGroupCollapseListener) {
|
mOnGroupCollapseListener = onGroupCollapseListener;
|
}
|
|
public void setOnGroupExpandListener(
|
OnGroupExpandListener onGroupExpandListener) {
|
mOnGroupExpandListener = onGroupExpandListener;
|
}
|
|
public void setOnGroupClickListener(OnGroupClickListener onGroupClickListener) {
|
mOnGroupClickListener = onGroupClickListener;
|
}
|
|
public void setOnChildClickListener(OnChildClickListener onChildClickListener) {
|
mOnChildClickListener = onChildClickListener;
|
}
|
|
/**
|
* Converts a flat list position (the raw position of an item (child or group)
|
* in the list) to a group and/or child position (represented in a
|
* packed position). This is useful in situations where the caller needs to
|
* use the underlying {@link android.widget.ListView}'s methods. Use
|
* {@link ExpandableHListView#getPackedPositionType} ,
|
* {@link ExpandableHListView#getPackedPositionChild},
|
* {@link ExpandableHListView#getPackedPositionGroup} to unpack.
|
*
|
* @param flatListPosition The flat list position to be converted.
|
* @return The group and/or child position for the given flat list position
|
* in packed position representation. #PACKED_POSITION_VALUE_NULL if
|
* the position corresponds to a header or a footer item.
|
*/
|
public long getExpandableListPosition(int flatListPosition) {
|
if (isHeaderOrFooterPosition(flatListPosition)) {
|
return PACKED_POSITION_VALUE_NULL;
|
}
|
final int adjustedPosition = getFlatPositionForConnector(flatListPosition);
|
ExpandableHListConnector.PositionMetadata pm = mConnector.getUnflattenedPos(adjustedPosition);
|
long packedPos = pm.position.getPackedPosition();
|
pm.recycle();
|
return packedPos;
|
}
|
|
/**
|
* Converts a group and/or child position to a flat list position. This is
|
* useful in situations where the caller needs to use the underlying
|
* {@link android.widget.ListView}'s methods.
|
*
|
* @param packedPosition The group and/or child positions to be converted in
|
* packed position representation. Use
|
* {@link #getPackedPositionForChild(int, int)} or
|
* {@link #getPackedPositionForGroup(int)}.
|
* @return The flat list position for the given child or group.
|
*/
|
public int getFlatListPosition(long packedPosition) {
|
ExpandableHListPosition elPackedPos = ExpandableHListPosition.obtainPosition(packedPosition);
|
ExpandableHListConnector.PositionMetadata pm = mConnector.getFlattenedPos(elPackedPos);
|
elPackedPos.recycle();
|
final int flatListPosition = pm.position.flatListPos;
|
pm.recycle();
|
return getAbsoluteFlatPosition(flatListPosition);
|
}
|
|
/**
|
* Gets the position of the currently selected group or child (along with
|
* its type). Can return {@link #PACKED_POSITION_VALUE_NULL} if no selection.
|
*
|
* @return A packed position containing the currently selected group or
|
* child's position and type. #PACKED_POSITION_VALUE_NULL if no selection
|
* or if selection is on a header or a footer item.
|
*/
|
public long getSelectedPosition() {
|
final int selectedPos = getSelectedItemPosition();
|
// The case where there is no selection (selectedPos == -1) is also handled here.
|
return getExpandableListPosition(selectedPos);
|
}
|
|
/**
|
* Gets the ID of the currently selected group or child. Can return -1 if no
|
* selection.
|
*
|
* @return The ID of the currently selected group or child. -1 if no
|
* selection.
|
*/
|
public long getSelectedId() {
|
long packedPos = getSelectedPosition();
|
if (packedPos == PACKED_POSITION_VALUE_NULL) return -1;
|
int groupPos = getPackedPositionGroup(packedPos);
|
if (getPackedPositionType(packedPos) == PACKED_POSITION_TYPE_GROUP) {
|
// It's a group
|
return mAdapter.getGroupId(groupPos);
|
} else {
|
// It's a child
|
return mAdapter.getChildId(groupPos, getPackedPositionChild(packedPos));
|
}
|
}
|
|
/**
|
* Sets the selection to the specified group.
|
*
|
* @param groupPosition The position of the group that should be selected.
|
*/
|
public void setSelectedGroup(int groupPosition) {
|
ExpandableHListPosition elGroupPos = ExpandableHListPosition.obtainGroupPosition(groupPosition);
|
ExpandableHListConnector.PositionMetadata pm = mConnector.getFlattenedPos(elGroupPos);
|
elGroupPos.recycle();
|
final int absoluteFlatPosition = getAbsoluteFlatPosition(pm.position.flatListPos);
|
super.setSelection(absoluteFlatPosition);
|
pm.recycle();
|
}
|
|
/**
|
* Sets the selection to the specified child. If the child is in a collapsed
|
* group, the group will only be expanded and child subsequently selected if
|
* shouldExpandGroup is set to true, otherwise the method will return false.
|
*
|
* @param groupPosition The position of the group that contains the child.
|
* @param childPosition The position of the child within the group.
|
* @param shouldExpandGroup Whether the child's group should be expanded if
|
* it is collapsed.
|
* @return Whether the selection was successfully set on the child.
|
*/
|
public boolean setSelectedChild(int groupPosition, int childPosition, boolean shouldExpandGroup) {
|
ExpandableHListPosition elChildPos = ExpandableHListPosition.obtainChildPosition(groupPosition, childPosition);
|
ExpandableHListConnector.PositionMetadata flatChildPos = mConnector.getFlattenedPos(elChildPos);
|
if (flatChildPos == null) {
|
// The child's group isn't expanded
|
// Shouldn't expand the group, so return false for we didn't set the selection
|
if (!shouldExpandGroup) return false;
|
expandGroup(groupPosition);
|
flatChildPos = mConnector.getFlattenedPos(elChildPos);
|
// Sanity check
|
if (flatChildPos == null) {
|
throw new IllegalStateException("Could not find child");
|
}
|
}
|
int absoluteFlatPosition = getAbsoluteFlatPosition(flatChildPos.position.flatListPos);
|
super.setSelection(absoluteFlatPosition);
|
elChildPos.recycle();
|
flatChildPos.recycle();
|
return true;
|
}
|
|
/**
|
* Whether the given group is currently expanded.
|
*
|
* @param groupPosition The group to check.
|
* @return Whether the group is currently expanded.
|
*/
|
public boolean isGroupExpanded(int groupPosition) {
|
return mConnector.isGroupExpanded(groupPosition);
|
}
|
|
ContextMenuInfo createContextMenuInfo(View view, int flatListPosition, long id) {
|
if (isHeaderOrFooterPosition(flatListPosition)) {
|
// Return normal info for header/footer view context menus
|
return new AdapterContextMenuInfo(view, flatListPosition, id);
|
}
|
final int adjustedPosition = getFlatPositionForConnector(flatListPosition);
|
ExpandableHListConnector.PositionMetadata pm = mConnector.getUnflattenedPos(adjustedPosition);
|
ExpandableHListPosition pos = pm.position;
|
id = getChildOrGroupId(pos);
|
long packedPosition = pos.getPackedPosition();
|
pm.recycle();
|
return new ExpandableListContextMenuInfo(view, packedPosition, id);
|
}
|
|
/**
|
* Gets the ID of the group or child at the given <code>position</code>.
|
* This is useful since there is no ListAdapter ID -> ExpandableListAdapter
|
* ID conversion mechanism (in some cases, it isn't possible).
|
*
|
* @param position The position of the child or group whose ID should be
|
* returned.
|
*/
|
private long getChildOrGroupId(ExpandableHListPosition position) {
|
if (position.type == ExpandableHListPosition.CHILD) {
|
return mAdapter.getChildId(position.groupPos, position.childPos);
|
} else {
|
return mAdapter.getGroupId(position.groupPos);
|
}
|
}
|
|
/**
|
* Sets the indicator to be drawn next to a child.
|
*
|
* @param childIndicator The drawable to be used as an indicator. If the
|
* child is the last child for a group, the state
|
* {@link android.R.attr#state_last} will be set.
|
*/
|
public void setChildIndicator(Drawable childIndicator) {
|
mChildIndicator = childIndicator;
|
resolveChildIndicator();
|
}
|
|
/**
|
* Sets the indicator to be drawn next to a group.
|
*
|
* @param groupIndicator The drawable to be used as an indicator. If the
|
* group is empty, the state {@link android.R.attr#state_empty} will be
|
* set. If the group is expanded, the state
|
* {@link android.R.attr#state_expanded} will be set.
|
*/
|
public void setGroupIndicator(Drawable groupIndicator) {
|
mGroupIndicator = groupIndicator;
|
resolveIndicator();
|
}
|
|
public Parcelable onSaveInstanceState() {
|
Parcelable superState = super.onSaveInstanceState();
|
return new SavedState(superState, mConnector != null ? mConnector.getExpandedGroupMetadataList() : null);
|
}
|
|
public void onRestoreInstanceState(Parcelable state) {
|
if (!(state instanceof SavedState)) {
|
super.onRestoreInstanceState(state);
|
return;
|
}
|
SavedState ss = (SavedState) state;
|
super.onRestoreInstanceState(ss.getSuperState());
|
if (mConnector != null && ss.expandedGroupMetadataList != null) {
|
mConnector.setExpandedGroupMetadataList(ss.expandedGroupMetadataList);
|
}
|
}
|
|
public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
|
super.onInitializeAccessibilityEvent(event);
|
event.setClassName(ExpandableHListView.class.getName());
|
}
|
|
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
|
public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
|
super.onInitializeAccessibilityNodeInfo(info);
|
info.setClassName(ExpandableHListView.class.getName());
|
}
|
|
/**
|
* Used for being notified when a group is collapsed
|
*/
|
public interface OnGroupCollapseListener {
|
/**
|
* Callback method to be invoked when a group in this expandable list has
|
* been collapsed.
|
*
|
* @param groupPosition The group position that was collapsed
|
*/
|
void onGroupCollapse(int groupPosition);
|
}
|
|
/**
|
* Used for being notified when a group is expanded
|
*/
|
public interface OnGroupExpandListener {
|
/**
|
* Callback method to be invoked when a group in this expandable list has
|
* been expanded.
|
*
|
* @param groupPosition The group position that was expanded
|
*/
|
void onGroupExpand(int groupPosition);
|
}
|
|
/**
|
* Interface definition for a callback to be invoked when a group in this
|
* expandable list has been clicked.
|
*/
|
public interface OnGroupClickListener {
|
/**
|
* Callback method to be invoked when a group in this expandable list has
|
* been clicked.
|
*
|
* @param parent The ExpandableHListConnector where the click happened
|
* @param v The view within the expandable list/ListView that was clicked
|
* @param groupPosition The group position that was clicked
|
* @param id The row id of the group that was clicked
|
* @return True if the click was handled
|
*/
|
boolean onGroupClick(
|
ExpandableHListView parent, View v, int groupPosition, long id);
|
}
|
|
/**
|
* Interface definition for a callback to be invoked when a child in this
|
* expandable list has been clicked.
|
*/
|
public interface OnChildClickListener {
|
/**
|
* Callback method to be invoked when a child in this expandable list has
|
* been clicked.
|
*
|
* @param parent The ExpandableListView where the click happened
|
* @param v The view within the expandable list/ListView that was clicked
|
* @param groupPosition The group position that contains the child that
|
* was clicked
|
* @param childPosition The child position within the group
|
* @param id The row id of the child that was clicked
|
* @return True if the click was handled
|
*/
|
boolean onChildClick(
|
ExpandableHListView parent, View v, int groupPosition, int childPosition, long id);
|
}
|
|
/**
|
* Extra menu information specific to an {@link ExpandableHListView} provided
|
* to the
|
* {@link android.view.View.OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo) }
|
* callback when a context menu is brought up for this AdapterView.
|
*/
|
public static class ExpandableListContextMenuInfo implements ContextMenu.ContextMenuInfo {
|
/**
|
* The view for which the context menu is being displayed. This
|
* will be one of the children Views of this {@link ExpandableHListView}.
|
*/
|
public View targetView;
|
/**
|
* The packed position in the list represented by the adapter for which
|
* the context menu is being displayed. Use the methods
|
* {@link ExpandableHListView#getPackedPositionType},
|
* {@link ExpandableHListView#getPackedPositionChild}, and
|
* {@link ExpandableHListView#getPackedPositionGroup} to unpack this.
|
*/
|
public long packedPosition;
|
/**
|
* The ID of the item (group or child) for which the context menu is
|
* being displayed.
|
*/
|
public long id;
|
|
public ExpandableListContextMenuInfo(View targetView, long packedPosition, long id) {
|
this.targetView = targetView;
|
this.packedPosition = packedPosition;
|
this.id = id;
|
}
|
}
|
|
static class SavedState extends BaseSavedState {
|
public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
|
public SavedState createFromParcel(Parcel in) {
|
return new SavedState(in);
|
}
|
|
public SavedState[] newArray(int size) {
|
return new SavedState[size];
|
}
|
};
|
ArrayList<ExpandableHListConnector.GroupMetadata> expandedGroupMetadataList;
|
|
/**
|
* Constructor called from {@link ExpandableHListView#onSaveInstanceState()}
|
*/
|
SavedState(
|
Parcelable superState, ArrayList<ExpandableHListConnector.GroupMetadata> expandedGroupMetadataList) {
|
super(superState);
|
this.expandedGroupMetadataList = expandedGroupMetadataList;
|
}
|
|
/**
|
* Constructor called from {@link #CREATOR}
|
*/
|
private SavedState(Parcel in) {
|
super(in);
|
expandedGroupMetadataList = new ArrayList<ExpandableHListConnector.GroupMetadata>();
|
in.readList(expandedGroupMetadataList, ExpandableHListConnector.class.getClassLoader());
|
}
|
|
public void writeToParcel(Parcel out, int flags) {
|
super.writeToParcel(out, flags);
|
out.writeList(expandedGroupMetadataList);
|
}
|
}
|
}
|
