1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
5  * except in compliance with the License. You may obtain a copy of the License at
6  *
7  *      http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software distributed under the
10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
11  * KIND, either express or implied. See the License for the specific language governing
12  * permissions and limitations under the License.
13  */
14 
15 package android.testing;
16 
17 import android.content.pm.ApplicationInfo;
18 import android.graphics.PixelFormat;
19 import android.view.View;
20 import android.view.WindowManager;
21 import android.view.WindowManager.LayoutParams;
22 
23 /**
24  * Utilities to make testing views easier.
25  */
26 public class ViewUtils {
27 
28     /**
29      * Causes the view (and its children) to have {@link View#onAttachedToWindow()} called.
30      *
31      * This is currently done by adding the view to a window.
32      */
attachView(View view)33     public static void attachView(View view) {
34         attachView(view, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
35     }
36 
37     /**
38      * Causes the view (and its children) to have {@link View#onAttachedToWindow()} called.
39      *
40      * This is currently done by adding the view to a window.
41      */
attachView(View view, int width, int height)42     public static void attachView(View view, int width, int height) {
43         // Make sure hardware acceleration isn't turned on.
44         view.getContext().getApplicationInfo().flags &=
45                 ~(ApplicationInfo.FLAG_HARDWARE_ACCELERATED);
46         WindowManager.LayoutParams lp = new WindowManager.LayoutParams(width, height,
47                 LayoutParams.TYPE_APPLICATION_OVERLAY, 0, PixelFormat.TRANSLUCENT);
48         view.getContext().getSystemService(WindowManager.class).addView(view, lp);
49     }
50 
51     /**
52      * Causes the view (and its children) to have {@link View#onDetachedFromWindow()} called.
53      *
54      * This is currently done by removing the view from a window.
55      */
detachView(View view)56     public static void detachView(View view) {
57         view.getContext().getSystemService(WindowManager.class).removeViewImmediate(view);
58     }
59 }
60