当我按下我的快门按钮时，我遇到了 2 件奇怪的事情CameraActivity
在设备 2.3 和 4.0（Galaxy Ace II、Nexus One 和 Galaxy Nexus）上，它将冻结大约 2 秒，然后继续运行
nextActivity。只有 Galaxy Ace 2.3.6，它会在冻结期间给我一个像下图这样的乱码，但它可以在稍后给我正确的图像
nextActivity。
起初我认为我的方法可能有问题或耗时PicutureCallback，但看起来没问题？而且我不明白为什么这个乱码只会出现在 Galaxy Ace 上。
那么会有更好的方法来处理它PictureCallback以使其更快吗？
没有错误日志，所以我只是把我的相关代码：
// I call the takePicture in my button listener.
camera.takePicture(null, null, mPicture);
// here's the picture callback
private PictureCallback mPicture = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
new ShutterHandler(data).execute();
}
class ShutterHandler extends AsyncTask<Void, Void, Void> {
Bitmap bm;
String timeStamp;
String filename;
Intent nextIntent = new Intent(CameraActivity.this, nextActivity.class);
// a tricky way to pass data into the AsyncTask
public ShutterHandler(byte[] data) {
bm = BitmapFactory.decodeByteArray(data, 0, data.length);
}
@Override
protected Void doInBackground(Void... params) {
// simply generate a time stamp as filename
timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
filename = timeStamp + ".jpg";
Uri path;
try {
// save file to app's private folder
FileOutputStream fos = openFileOutput(filename, Context.MODE_PRIVATE);
bm.compress(Bitmap.CompressFormat.JPEG, 100, fos);
// retrieve Uri from the file
path = Uri.fromFile(getFileStreamPath(filename));
Log.d("CameraActivity", "file saved to: " + path);
fos.flush();
fos.close();
// launch ShowMarkersActivity
String pathString = path.getPath();
nextIntent.putExtra("IMG", pathString);
nextIntent.putExtra("FileName", filename);
nextIntent.putExtra("FLAG", true);
} catch (FileNotFoundException e) {
Log.d("CameraActivity", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("CameraActivity", "Error accessing file: " + e.getMessage());
}
return null;
}
protected void onPostExecute(Void v) {
CameraActivity.this.startActivity(nextIntent);
finish();
}
}
};