1 /* 2 * Copyright (C) 2011 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 17 package android.view; 18 19 import android.content.Context; 20 import android.graphics.Canvas; 21 import android.graphics.Color; 22 import android.os.SystemClock; 23 import android.util.AttributeSet; 24 import android.util.Log; 25 import android.view.View; 26 27 /** 28 * A View that will throw a RuntimeException if onAttachedToWindow and 29 * onDetachedFromWindow is called in the wrong order for ViewAttachTest 30 */ 31 public class ViewAttachView extends View { 32 public static final String TAG = "OnAttachedTest"; 33 private boolean attached; 34 35 public ViewAttachView(Context context, AttributeSet attrs, int defStyle) { 36 super(context, attrs, defStyle); 37 init(attrs, defStyle); 38 } 39 40 public ViewAttachView(Context context, AttributeSet attrs) { 41 super(context, attrs); 42 init(attrs, 0); 43 } 44 45 public ViewAttachView(Context context) { 46 super(context); 47 init(null, 0); 48 } 49 50 private void init(AttributeSet attrs, int defStyle) { 51 SystemClock.sleep(2000); 52 } 53 54 @Override 55 protected void onAttachedToWindow() { 56 Log.d(TAG, "onAttachedToWindow"); 57 super.onAttachedToWindow(); 58 if (attached) { 59 throw new RuntimeException("OnAttachedToWindow called more than once in a row"); 60 } 61 attached = true; 62 } 63 64 @Override 65 protected void onDetachedFromWindow() { 66 Log.d(TAG, "onDetachedFromWindow"); 67 super.onDetachedFromWindow(); 68 if (!attached) { 69 throw new RuntimeException( 70 "onDetachedFromWindowcalled without prior call to OnAttachedToWindow"); 71 } 72 attached = false; 73 } 74 75 @Override 76 protected void onDraw(Canvas canvas) { 77 super.onDraw(canvas); 78 canvas.drawColor(Color.BLUE); 79 } 80 } 81
