I'm using a custom camera class in android. I want to take a photo (only one), finish the activity and return this photo, It doesn't matter if i do this with a bitmap or a bytearray. I'm using an Intent to return the picture.
I have tested 2 ways for do it, but in one way the camera being blocked after take a photo (without exception) and in the other way, in activity result, I can't take the picutre (Bitmap or bytearray) that I have put in the Intent (because it's null)
Here 2 classes, MainActivity and GGCameraActivity (the activity that runs the camera and takes the photo).
MAIN ACTIVITY:
public class MainActivity extends ActionBarActivity{
private static final int CAMERA_ACTIVITY_ID = 98;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b1 = (Button)findViewById(R.id.b_empezar);
b1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startButtonClick();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_configuracion) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onActivityResult(int reqCode, int resCode, Intent handler){
switch(reqCode){
case CAMERA_ACTIVITY_ID:
if(resCode == RESULT_OK){
//get the byte array
byte[] b = handler.getExtras().getByteArray(GGCameraActivity.PARAM_PHOTO);
//'b' is null.
}
break;
}
}
private void startButtonClick(){
Intent i = new Intent(this, GGCameraActivity.class);
startActivityForResult(i, CAMERA_ACTIVITY_ID);
}
}
CAMERA ACTIVITY:
public class GGCameraActivity extends Activity {
private Activity context;
private GGCameraPreview preview;
private Camera camera;
private ImageView fotoButton;
public static final String PARAM_PHOTO = "bmp";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ggcamera);
context = this;
fotoButton = (ImageView) findViewById(R.id.photo_button);
fotoButton.setOnClickListener(photoButtonClick);
preview = new GGCameraPreview(this,(SurfaceView) findViewById(R.id.ggcameraFragment));
FrameLayout frame = (FrameLayout) findViewById(R.id.ggcameraPreview);
frame.addView(preview);
preview.setKeepScreenOn(true);
}
@Override
protected void onResume() {
super.onResume();
if (camera == null) {
camera = Camera.open();
camera.startPreview();
camera.setErrorCallback(new ErrorCallback() {
@Override
public void onError(int error, Camera mcamera) {
camera.release();
camera = Camera.open();
Log.d("Camera died", "error camera");
}
});
}
if (camera != null) {
if (Build.VERSION.SDK_INT >= 14)
setCameraDisplayOrientation(context,
CameraInfo.CAMERA_FACING_BACK, camera);
preview.setCamera(camera);
}
}
@Override
protected void onPause() {
if (camera != null) {
camera.stopPreview();
preview.setCamera(null);
camera.release();
camera = null;
}
super.onPause();
}
private void setCameraDisplayOrientation(Activity activity, int cameraId,
android.hardware.Camera camera) {
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(cameraId, info);
int rotation = activity.getWindowManager().getDefaultDisplay()
.getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(result);
}
private OnClickListener photoButtonClick = new OnClickListener() {
@Override
public void onClick(View v) {
fotoButton.setClickable(false);
camera.autoFocus(mAutoFocusCallback);
}
};
Camera.AutoFocusCallback mAutoFocusCallback = new Camera.AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
camera.takePicture(null, null, jpegCallback);
}
};
private PictureCallback jpegCallback = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Intent resultIntent = new Intent();
resultIntent.putExtra(PARAM_PHOTO, data);
context.setResult(RESULT_OK, resultIntent);
context.finish();
}
};
}
NOTE:
I have no errors as exceptions (I mean, the application don't stops cause of an exception), but I have debugged the classes many times and always I think an exception is raised but catched in some place (but not by me) in "Camera.class" (camera class provided by android). I think this because I always enter in a code snippet (in Camera.class) that's to throw an exception. Here this code snippet:
if (msgType!= CAMERA_MSG_PREVIEW_FRAME &&
msgType != CAMERA_MSG_RAW_IMAGE){
throw new IllegalArgumentException("Unsopported message type: "+ msgType);
}
This code snippet is in Camera.class, I always enter it but, if I don't debug the app, just run it (not taking the captured photo from MainActivity) all works well, the app does not crash.
EDIT 1:
I need a custom camera activity, Intent(MediaStore.ACTION_IMAGE_CAPTURE); is not the thing I need.
EDIT 2: I have tested to return a simple integer. I have the same error, the camera blocks after push the button of take photo and never returns to the main activity. Debuggin I can see again the IllegalArgumentException() mentioned above, but app doesn't crash. Here the code (changes only in callback and onActivityResult for tke integer instead of byte[]):
Callback of takePicture:
private PictureCallback jpegCallback = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Intent resultIntent = new Intent();
resultIntent.putExtra("int", 5);
setResult(RESULT_OK, resultIntent);
finish();
}
};
onActivityResult in MainActivity
[...]
case CAMERA_ACTIVITY_ID:
if(resCode == RESULT_OK){
int n = handler.getExtras().getInt("int");
}
break;
[...]
EDIT 3: While debugging, I have step into finish method. I have found that this exception is raised:
throw new UnsupportedOperationException(
"startNextMatchingActivity can only be called from a top-level activity");
But, again, the application does not crash.
