package com.basic.security.activity; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.view.View; import com.basic.security.utils.PermissionHelper; public class WelcomeActivity extends FragmentActivity { public static WelcomeActivity activity; public WelcomeActivity() { activity = this; } public void hideSystemUI() { getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_IMMERSIVE); } protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(com.basic.security.utils.ResolutionAdaptation.activity_welcome()); getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(visibility -> hideSystemUI()); hideSystemUI(); if (!PermissionHelper.hasCameraPermission(this)) { PermissionHelper.requestCameraPermission(this, true); } } }