Android 中 ACTION_IMAGE_CAPTURE 的解码位图问题
我试图让我的应用程序拍照并返回该照片以供使用。但是，它在模拟器和 Nexus One 上都会引发异常。
这是我的代码：
private File temporaryCameraFile = new File("/sdcard/tmp.bmp");
当从菜单中选择拍照时：
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, Uri.fromFile(temporaryCameraFile));
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
在onActivityResult()中
if(resultCode == RESULT_OK){
Bitmap cameraPicture = decodeFile(temporaryCameraFile);
// resize to fit screen and add to queue to be drawn
if (cameraPicture != null)
if ((cameraPicture.getWidth() > 0) && (cameraPicture.getHeight() > 0))
page.SetBackground(ResizeImageToFit(cameraPicture));
}
decodeFile()
private Bitmap decodeFile(File f){
try {
//decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//decode with inSampleSize
o.inJustDecodeBounds = false;
Bitmap retval = BitmapFactory.decodeStream(new FileInputStream(f), null, o);
return retval;
} catch (FileNotFoundException e) {
Log.e("decodeFile()", e.toString());
return null;
}
}
在decodeFile()中，第一个解码正确返回边界。但是，当我第二次调用它时，我在模拟器和 Nexus One 上都收到以下错误。我尝试更新解码文件以仅执行主解码而不使用 inJustDecodeBounds 方法，但这也失败了。另外，我已手动将文件从设备中拉出，它是有效的位图。
09-20 15:30:58.711: ERROR/AndroidRuntime(332): Caused by: java.lang.IllegalArgumentException: width and height must be > 0
任何帮助将不胜感激。
谢谢。
I am trying to have my app take a picture and return that picture for use. However, it is throwing an exception both in the emulator and on a Nexus One.
Here is my code:
private File temporaryCameraFile = new File("/sdcard/tmp.bmp");
When chose from the menu to take a picture:
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, Uri.fromFile(temporaryCameraFile));
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
in onActivityResult()
if(resultCode == RESULT_OK){
Bitmap cameraPicture = decodeFile(temporaryCameraFile);
// resize to fit screen and add to queue to be drawn
if (cameraPicture != null)
if ((cameraPicture.getWidth() > 0) && (cameraPicture.getHeight() > 0))
page.SetBackground(ResizeImageToFit(cameraPicture));
}
decodeFile()
private Bitmap decodeFile(File f){
try {
//decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//decode with inSampleSize
o.inJustDecodeBounds = false;
Bitmap retval = BitmapFactory.decodeStream(new FileInputStream(f), null, o);
return retval;
} catch (FileNotFoundException e) {
Log.e("decodeFile()", e.toString());
return null;
}
}
In decodeFile(), the first decode properly returns the bounds. However, when I call it the second time, I get the following error on both the emulator and the Nexus One. I tried updating the decodeFile to only do the main decode without the inJustDecodeBounds method, but that failed as well. Also, I have pulled the file off of the device manually and it is a valid bitmap.
09-20 15:30:58.711: ERROR/AndroidRuntime(332): Caused by: java.lang.IllegalArgumentException: width and height must be > 0
Any help would be appreciated.
Thanks.
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使用内容解析器来解码位图。请参阅 Android 相机意图 中的答案
Use the content resolver to decode the bitmap instead. Refer to the answer at Android camera intent