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      1 /*
      2  * Copyright (C) 2013 DroidDriver committers
      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 com.google.android.droiddriver.instrumentation;
     18 
     19 import android.app.Activity;
     20 import android.app.Instrumentation;
     21 import android.graphics.Bitmap;
     22 import android.os.SystemClock;
     23 import android.view.View;
     24 
     25 import com.google.android.droiddriver.base.AbstractDroidDriver;
     26 import com.google.android.droiddriver.exceptions.TimeoutException;
     27 import com.google.android.droiddriver.util.ActivityUtils;
     28 import com.google.common.primitives.Longs;
     29 
     30 /**
     31  * Implementation of a UiDriver that is driven via instrumentation.
     32  */
     33 public class InstrumentationDriver extends AbstractDroidDriver {
     34   private final InstrumentationContext context;
     35 
     36   public InstrumentationDriver(Instrumentation instrumentation) {
     37     super(instrumentation);
     38     this.context = new InstrumentationContext(instrumentation);
     39   }
     40 
     41   @Override
     42   protected ViewElement getNewRootElement() {
     43     return context.getUiElement(findRootView());
     44   }
     45 
     46   @Override
     47   protected InstrumentationContext getContext() {
     48     return context;
     49   }
     50 
     51   private View findRootView() {
     52     Activity runningActivity = getRunningActivity();
     53     View[] views = RootFinder.getRootViews();
     54     if (views.length > 1) {
     55       for (View view : views) {
     56         if (view.hasWindowFocus()) {
     57           return view;
     58         }
     59       }
     60     }
     61     return runningActivity.getWindow().getDecorView();
     62   }
     63 
     64   private Activity getRunningActivity() {
     65     long timeoutMillis = getPoller().getTimeoutMillis();
     66     long end = SystemClock.uptimeMillis() + timeoutMillis;
     67     while (true) {
     68       instrumentation.waitForIdleSync();
     69       Activity runningActivity = ActivityUtils.getRunningActivity();
     70       if (runningActivity != null) {
     71         return runningActivity;
     72       }
     73       long remainingMillis = end - SystemClock.uptimeMillis();
     74       if (remainingMillis < 0) {
     75         throw new TimeoutException(String.format(
     76             "Timed out after %d milliseconds waiting for foreground activity", timeoutMillis));
     77       }
     78       SystemClock.sleep(Longs.min(250, remainingMillis));
     79     }
     80   }
     81 
     82   private static class ScreenshotRunnable implements Runnable {
     83     private final View rootView;
     84     private Bitmap screenshot;
     85 
     86     private ScreenshotRunnable(View rootView) {
     87       this.rootView = rootView;
     88     }
     89 
     90     @Override
     91     public void run() {
     92       rootView.destroyDrawingCache();
     93       rootView.buildDrawingCache(false);
     94       screenshot = Bitmap.createBitmap(rootView.getDrawingCache());
     95       rootView.destroyDrawingCache();
     96     }
     97   }
     98 
     99   @Override
    100   protected Bitmap takeScreenshot() {
    101     ScreenshotRunnable screenshotRunnable = new ScreenshotRunnable(findRootView());
    102     instrumentation.runOnMainSync(screenshotRunnable);
    103     return screenshotRunnable.screenshot;
    104   }
    105 }
    106