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      1 /*
      2  * Copyright (C) 2008 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.cts;
     18 
     19 import android.app.Activity;
     20 import android.os.Bundle;
     21 import android.os.SystemClock;
     22 import android.util.Log;
     23 import com.android.cts.stub.R;
     24 
     25 public class ViewTestStubActivity extends Activity {
     26     private boolean mHasWindowFocus = false;
     27     private Object mHasWindowFocusLock = new Object();
     28 
     29     @Override
     30     protected void onCreate(Bundle icicle) {
     31         super.onCreate(icicle);
     32         setContentView(R.layout.view_layout);
     33     }
     34 
     35     @Override
     36     public void onWindowFocusChanged(boolean hasFocus) {
     37         super.onWindowFocusChanged(hasFocus);
     38         if (!hasFocus) {
     39             Log.w("ViewTestStubActivity", "ViewTestStubActivity lost window focus");
     40         }
     41         synchronized(mHasWindowFocusLock) {
     42             mHasWindowFocus = hasFocus;
     43             mHasWindowFocusLock.notify();
     44         }
     45     }
     46 
     47     /**
     48      * Blocks the calling thread until the {@link ViewTestStubActivity} has window focus or the
     49      * specified duration (in milliseconds) has passed.
     50      */
     51     public boolean waitForWindowFocus(long durationMillis) {
     52         long elapsedMillis = SystemClock.elapsedRealtime();
     53         synchronized(mHasWindowFocusLock) {
     54             mHasWindowFocus = hasWindowFocus();
     55             while (!mHasWindowFocus && durationMillis > 0) {
     56                 long newElapsedMillis = SystemClock.elapsedRealtime();
     57                 durationMillis -= (newElapsedMillis - elapsedMillis);
     58                 elapsedMillis = newElapsedMillis;
     59                 if (durationMillis > 0) {
     60                     try {
     61                         mHasWindowFocusLock.wait(durationMillis);
     62                     } catch (InterruptedException e) {
     63                     }
     64                 }
     65             }
     66             return mHasWindowFocus;
     67         }
     68     }
     69 }
     70