1 /*
2  * Copyright (C) 2009 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 public class Main {
18     Bitmap mBitmap1, mBitmap2, mBitmap3, mBitmap4;
19 
sleep(int ms)20     public static void sleep(int ms) {
21         try {
22             Thread.sleep(ms);
23         } catch (InterruptedException ie) {
24             System.err.println("sleep interrupted");
25         }
26     }
27 
main(String args[])28     public static void main(String args[]) {
29         System.out.println("start");
30 
31         Main main = new Main();
32         main.run();
33 
34         sleep(1000);
35         System.out.println("done");
36     }
37 
run()38     public void run() {
39         createBitmaps();
40 
41         Runtime.getRuntime().gc();
42         sleep(250);
43 
44         mBitmap2.drawAt(0, 0);
45 
46         System.out.println("nulling 1");
47         mBitmap1 = null;
48         Runtime.getRuntime().gc();
49         sleep(500);
50 
51         System.out.println("nulling 2");
52         mBitmap2 = null;
53         Runtime.getRuntime().gc();
54         sleep(500);
55 
56         System.out.println("nulling 3");
57         mBitmap3 = null;
58         Runtime.getRuntime().gc();
59         sleep(500);
60 
61         System.out.println("nulling 4");
62         mBitmap4 = null;
63         Runtime.getRuntime().gc();
64         sleep(500);
65 
66         Bitmap.shutDown();
67     }
68 
69     /*
70      * Create bitmaps.
71      *
72      * bitmap1 is 10x10 and unique
73      * bitmap2 and bitmap3 are 20x20 and share the same storage.
74      * bitmap4 is just another reference to bitmap3
75      *
76      * When we return there should be no local refs lurking on the stack.
77      */
createBitmaps()78     public void createBitmaps() {
79         Bitmap.NativeWrapper dataA = Bitmap.allocNativeStorage(10, 10);
80         Bitmap.NativeWrapper dataB = Bitmap.allocNativeStorage(20, 20);
81         mBitmap1 = new Bitmap("one", 10, 10, dataA);
82         mBitmap2 = new Bitmap("two", 20, 20, dataB);
83         mBitmap3 = mBitmap4 = new Bitmap("three/four", 20, 20, dataB);
84     }
85 }
86