我正在尝试让我的应用拍照并返回该图片以供使用。但是,它在模拟器和Nexus One上都会抛出异常。
这是我的代码:
private File temporaryCameraFile = new File("/sdcard/tmp.bmp");
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);
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;
}
}
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上都出现以下错误。我尝试更新decodeFile只进行主解码而不使用inJustDecodeBounds方法,但也失败了。此外,我已手动将文件从设备中拉出,这是一个有效的位图。
09-20 15:30:58.711: ERROR/AndroidRuntime(332): Caused by: java.lang.IllegalArgumentException: width and height must be > 0
任何帮助都将不胜感激。
感谢。