/*
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* Copyright (C) 2016 venshine.cn@gmail.com
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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 cn.com.basic.face.dialog.wheelview.util;
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import android.content.Context;
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import android.text.TextUtils;
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import android.util.Log;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.TextView;
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import java.util.Collection;
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/**
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* 滚轮工具类
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*
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* @author venshine
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*/
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public class WheelUtils {
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private static final String TAG = "WheelView";
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/**
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* 打印日志
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*
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* @param msg
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*/
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public static void log(String msg) {
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if (!TextUtils.isEmpty(msg)) {
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Log.d(TAG, msg);
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}
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}
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/**
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* 判断集合是否为空
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*
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* @param c
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* @param <V>
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* @return
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*/
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public static <V> boolean isEmpty(Collection<V> c) {
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return (c == null || c.size() == 0);
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}
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/**
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* 遍历查找TextView
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*
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* @param view
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* @return
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*/
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public static TextView findTextView(View view) {
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if (view instanceof TextView) {
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return (TextView) view;
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} else {
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if (view instanceof ViewGroup) {
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return findTextView(((ViewGroup) view).getChildAt(0));
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} else {
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return null;
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}
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}
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}
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/**
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* dip转换到px
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*
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* @param context
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* @param dp
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* @return
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*/
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public static int dip2px(Context context, float dp) {
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final float scale = context.getResources().getDisplayMetrics().density;
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return (int) (dp * scale + 0.5f);
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}
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/**
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* sp转换到px
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*
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* @param context
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* @param sp
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* @return
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*/
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public static int sp2px(Context context, float sp) {
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final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
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return (int) (sp * fontScale + 0.5f);
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}
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}
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