关于image：将文件解码为Android中的Bitmap抛出异常

Decode the file to Bitmap in Android throwing exception

本问题已经有最佳答案，请猛点这里访问。

Possible Duplicate:
Android: Strange out of memory issue while loading an image to a Bitmap object

我开发了将文件解码为Bitmap的应用程序。我完成了以下代码，但它总是抛出内存异常

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69

private Bitmap decodeFile(File f) {
Bitmap bmp = null;
FileInputStream fis = null;
try {
// decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inTempStorage = new byte[16*1024];
o.inJustDecodeBounds = true;
o.inPurgeable=true;
//if(!f.exists()) f.createNewFile();

if(!f.exists()) f.createNewFile();

fis = new FileInputStream(f);
BitmapFactory.decodeStream(fis, null, o);
try {
fis.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
fis = null;
// Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE = 70;
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 2 < REQUIRED_SIZE
|| height_tmp / 2 < REQUIRED_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}

// decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inTempStorage = new byte[16*1024];
o2.inSampleSize = scale;
o2.inPurgeable=true;
o2.inTempStorage = new byte[16*1024];

fis = new FileInputStream(f);
bmp = BitmapFactory.decodeStream(fis);
if (fis != null)
fis.close();
fis = null;
return bmp;
// return BitmapFactory.decodeFile(f.getAbsolutePath(), o2);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {

System.gc();
try {
if (fis != null)
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
fis = null;

}
return null;
}

添加了日志猫

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

12-03 12:03:05.070: E/AndroidRuntime(30696): FATAL EXCEPTION: main
12-03 12:03:05.070: E/AndroidRuntime(30696): java.lang.OutOfMemoryError
12-03 12:03:05.070: E/AndroidRuntime(30696): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
12-03 12:03:05.070: E/AndroidRuntime(30696): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:527)
12-03 12:03:05.070: E/AndroidRuntime(30696): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:301)
12-03 12:03:05.070: E/AndroidRuntime(30696): at com.dexterity.iPinion.RootActivity.readFromSDCard(RootActivity.java:1984)
12-03 12:03:05.070: E/AndroidRuntime(30696): at com.dexterity.iPinion.RootActivity.setBrandingImage(RootActivity.java:285)
12-03 12:03:05.070: E/AndroidRuntime(30696): at com.dexterity.iPinion.RootActivity.access$0(RootActivity.java:252)
12-03 12:03:05.070: E/AndroidRuntime(30696): at com.dexterity.iPinion.RootActivity$1.handleMessage(RootActivity.java:515)
12-03 12:03:05.070: E/AndroidRuntime(30696): at android.os.Handler.dispatchMessage(Handler.java:99)
12-03 12:03:05.070: E/AndroidRuntime(30696): at android.os.Looper.loop(Looper.java:137)
12-03 12:03:05.070: E/AndroidRuntime(30696): at android.app.ActivityThread.main(ActivityThread.java:4745)
12-03 12:03:05.070: E/AndroidRuntime(30696): at java.lang.reflect.Method.invokeNative(Native Method)
12-03 12:03:05.070: E/AndroidRuntime(30696): at java.lang.reflect.Method.invoke(Method.java:511)
12-03 12:03:05.070: E/AndroidRuntime(30696): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-03 12:03:05.070: E/AndroidRuntime(30696): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-03 12:03:05.070: E/AndroidRuntime(30696): at dalvik.system.NativeStart.main(Native Method)