| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.view; |
| |
| import android.app.Activity; |
| import android.content.Context; |
| import android.os.Bundle; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewTreeObserver; |
| import android.view.View.OnClickListener; |
| import android.widget.Button; |
| import android.widget.LinearLayout; |
| |
| import com.android.frameworks.coretests.R; |
| |
| |
| /** |
| * Tests views with popupWindows becoming invisible |
| */ |
| public class PreDrawListener extends Activity implements OnClickListener { |
| |
| private MyLinearLayout mFrame; |
| |
| |
| static public class MyLinearLayout extends LinearLayout implements |
| ViewTreeObserver.OnPreDrawListener { |
| |
| public boolean mCancelNextDraw; |
| |
| public MyLinearLayout(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| public MyLinearLayout(Context context) { |
| super(context); |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| getViewTreeObserver().addOnPreDrawListener(this); |
| } |
| |
| public boolean onPreDraw() { |
| if (mCancelNextDraw) { |
| Button b = new Button(this.getContext()); |
| b.setText("Hello"); |
| addView(b, new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, |
| LayoutParams.WRAP_CONTENT)); |
| mCancelNextDraw = false; |
| return false; |
| } |
| return true; |
| } |
| |
| } |
| |
| @Override |
| protected void onCreate(Bundle icicle) { |
| super.onCreate(icicle); |
| setContentView(R.layout.pre_draw_listener); |
| |
| mFrame = findViewById(R.id.frame); |
| |
| Button mGoButton = findViewById(R.id.go); |
| mGoButton.setOnClickListener(this); |
| } |
| |
| |
| public void onClick(View v) { |
| mFrame.mCancelNextDraw = true; |
| mFrame.invalidate(); |
| } |
| |
| |
| |
| } |