Android Camera takePicture function does not call Callback function
- by Tomáš 'Guns Blazing' Frcek
I am working on a custom Camera activity for my application.
I was following the instruction from the Android Developers site here:
http://developer.android.com/guide/topics/media/camera.html
Everything seems to works fine, except the Callback function is not called and the picture is not saved. Here is my code:
public class CameraActivity extends Activity {
private Camera mCamera;
private CameraPreview mPreview;
private static final String TAG = "CameraActivity";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera);
// Create an instance of Camera
mCamera = getCameraInstance();
// Create our Preview view and set it as the content of our activity.
mPreview = new CameraPreview(this, mCamera);
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(mPreview);
Button captureButton = (Button) findViewById(R.id.button_capture);
captureButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.v(TAG, "will now take picture");
mCamera.takePicture(null, null, mPicture);
Log.v(TAG, "will now release camera");
mCamera.release();
Log.v(TAG, "will now call finish()");
finish();
}
});
}
private PictureCallback mPicture = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Log.v(TAG, "Getting output media file");
File pictureFile = getOutputMediaFile();
if (pictureFile == null) {
Log.v(TAG, "Error creating output file");
return;
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
} catch (FileNotFoundException e) {
Log.v(TAG, e.getMessage());
} catch (IOException e) {
Log.v(TAG, e.getMessage());
}
}
};
private static File getOutputMediaFile() {
String state = Environment.getExternalStorageState();
if (!state.equals(Environment.MEDIA_MOUNTED)) {
return null;
}
else {
File folder_gui = new File(Environment.getExternalStorageDirectory() + File.separator + "GUI");
if (!folder_gui.exists()) {
Log.v(TAG, "Creating folder: " + folder_gui.getAbsolutePath());
folder_gui.mkdirs();
}
File outFile = new File(folder_gui, "temp.jpg");
Log.v(TAG, "Returnng file: " + outFile.getAbsolutePath());
return outFile;
}
}
After clicking the Button, I get logs: "will now take picture", "will now release camera" and "will now call finish". The activity finishes succesfully, but the Callback function was not called during the
mCamera.takePicture(null, null, mPicture);
function (There were no logs from the mPicture callback or getMediaOutputFile functions) and there is no file in the location that was specified.
Any ideas? :)
Much thanks!
