1 /* 2 * Copyright 2015, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.settings.dashboard.conditional; 17 18 import android.content.Context; 19 import android.support.annotation.Nullable; 20 import android.support.v7.widget.RecyclerView; 21 import android.util.AttributeSet; 22 23 /** 24 * Version of RecyclerView that can have listeners for onWindowFocusChanged. 25 */ 26 public class FocusRecyclerView extends RecyclerView { 27 28 private FocusListener mListener; 29 30 public FocusRecyclerView(Context context, @Nullable AttributeSet attrs) { 31 super(context, attrs); 32 } 33 34 @Override 35 public void onWindowFocusChanged(boolean hasWindowFocus) { 36 super.onWindowFocusChanged(hasWindowFocus); 37 if (mListener != null) { 38 mListener.onWindowFocusChanged(hasWindowFocus); 39 } 40 } 41 42 public void setListener(FocusListener listener) { 43 mListener = listener; 44 } 45 46 public interface FocusListener { 47 void onWindowFocusChanged(boolean hasWindowFocus); 48 } 49 } 50
