android camera api and QR code - android

help mi with this, im making a aplication that use the camera and flash a qr code but the camera dont reponse i have this code im trying first to see something with the camera and the i will work with the recognition of the QR code any help will be good
public class activity_flashqr_normalscreensize extends Activity implements
SurfaceHolder.Callback {
private Button boton;
private SurfaceView VisorQR;
SurfaceHolder surfaceHolder;
android.hardware.Camera theCamera;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.flashqr_normalscreensize_esp);
boton = (Button)findViewById(R.id.btnfoto);
VisorQR = (SurfaceView)findViewById(R.id.visorqr);
surfaceHolder = VisorQR.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS)
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
return;
}
try {
theCamera.stopPreview();
}
catch (Exception e) {
}
try {
theCamera.setPreviewDisplay(surfaceHolder);
theCamera.startPreview();
}
catch (Exception e) {
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
theCamera.lock();
theCamera = android.hardware.Camera.open();
}
catch (RuntimeException e) {
System.err.println(e);
return;
}
android.hardware.Camera.Parameters param;
param = theCamera.getParameters();
param.setPreviewSize(350, 250);
theCamera.setParameters(param);
try {
theCamera.setPreviewDisplay(surfaceHolder);
theCamera.startPreview();
}
catch (Exception e) {
System.err.println(e);
return;
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
refreshCamera();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
theCamera.stopPreview();
theCamera.release();
theCamera = null;
}
}

i found a good tutorial to achive what i want here
http://www.codepool.biz/how-to-implement-a-simple-barcode-scan-application-on-android.html
also to use the zxing library u need to add this to the build.gradle.app
in dependedencies on android studio
compile 'com.journeyapps:zxing-android-embedded:3.2.0#aar'
compile 'com.google.zxing:core:3.2.1'

Related

MediaRecorder saving video the same size as the SurfaceView

hello I am trying to implement recording in my app. I am able to record a video and save it, but the aspect rateo and resolution are completely messed up. How can I tell to register with the highest quality available?
This is my code
public class VideoFragment extends Fragment implements SurfaceHolder.Callback{
private ToggleButton mToggleButton;
private SurfaceHolder mHolder;
private SurfaceView mSurfaceView;
private MediaRecorder mMediaRecorder;
private Camera mCamera;
private boolean mInitSuccesful;
public static VideoFragment newInstance() {
Bundle args = new Bundle();
VideoFragment fragment = new VideoFragment();
fragment.setArguments(args);
return fragment;
}
public VideoFragment(){}
#Override
public void onStart() {
super.onStart();
getActivity().setTitle(R.string.video);
}
#Override
public void onResume() {
super.onResume();
}
#Override
public void onPause() {
super.onPause();
shutdown();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_content, container, false);
Button yo = (Button) rootView.findViewById(R.id.pic);
yo.setVisibility(View.GONE);
mSurfaceView = (SurfaceView) rootView.findViewById(R.id.cameraView);
mHolder = mSurfaceView.getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mToggleButton = (ToggleButton) rootView.findViewById(R.id.toggleRecordingButton);
mToggleButton.setOnClickListener(new View.OnClickListener() {
#Override
// toggle video recording
public void onClick(View v) {
if (((ToggleButton)v).isChecked())
if(mMediaRecorder == null) {
try {
initRecorder(mHolder.getSurface());
} catch (IOException e) {
e.printStackTrace();
}
}else{
try {
mMediaRecorder.start();
}catch (NullPointerException e){
e.printStackTrace();
try {
initRecorder(mHolder.getSurface());
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
else {
mMediaRecorder.stop();
mMediaRecorder.reset();
try {
initRecorder(mHolder.getSurface());
} catch (IOException e) {
e.printStackTrace();
}
}
}
});
return rootView;
}
/* Init the MediaRecorder, the order the methods are called is vital to
* its correct functioning.
*/
private void initRecorder(Surface surface) throws IOException {
// It is very important to unlock the camera before doing setCamera
// or it will results in a black preview
if(mCamera == null) {
mCamera = Camera.open();
mCamera.unlock();
}
if(mMediaRecorder == null)
mMediaRecorder = new MediaRecorder();
mMediaRecorder.setPreviewDisplay(surface);
mMediaRecorder.setCamera(mCamera);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
File file = new File(Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
Utils.getVideoFilename());
// "touch" the file
if(!file.exists()) {
File parent = file.getParentFile();
if(parent != null)
if(!parent.exists())
if(!parent.mkdirs())
throw new IOException("Cannot create " +
"parent directories for file: " + file);
file.createNewFile();
}
mMediaRecorder.setOutputFile(file.getAbsolutePath());
// No limit. Don't forget to check the space on disk.
mMediaRecorder.setMaxDuration(-1);
mMediaRecorder.setVideoFrameRate(15);
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
try {
mMediaRecorder.prepare();
} catch (IllegalStateException e) {
// This is thrown if the previous calls are not called with the
// proper order
e.printStackTrace();
}
mInitSuccesful = true;
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
if(!mInitSuccesful)
initRecorder(mHolder.getSurface());
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
shutdown();
}
private void shutdown() {
// Release MediaRecorder and especially the Camera as it's a shared
// object that can be used by other applications
mMediaRecorder.reset();
mMediaRecorder.release();
mCamera.release();
// once the objects have been released they can't be reused
mMediaRecorder = null;
mCamera = null;
}
}
Thanks
EDIT:
Solution thanks to the accepted answer
CamcorderProfile cpHigh = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
mMediaRecorder.setProfile(cpHigh);
Try using a CamcorderProfile to set all the MediaRecorder resolution and quality settings first; you don't currently set many of the values, such as size. The MediaRecorder will not pay any attention to the dimensions of your SurfaceView, for one.

Camera is being used after Camera.release was called android

I know there are some similar subjects connecting to this but I couldn't solve mine. anyway,I am trying to make some front camera with "flash" where I am calling Camera.release only once in the whole activities, when surfaceDestroyed(). so here is my MainActivity:
#SuppressWarnings("deprecation")
public class MainActivity extends AppCompatActivity {
private Camera mCamera = null;
private CameraPreview mCameraView = null;
private int cameraId = 0;
private void addView() {
if (!getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
Toast.makeText(this, "No camera on this device", Toast.LENGTH_LONG)
.show();
} else {
cameraId = findFrontFacingCamera();
if (cameraId < 0) {
Toast.makeText(this, "No front facing camera found.",
Toast.LENGTH_LONG).show();
} else {
try {
mCamera = Camera.open(cameraId);
} catch (Exception e) {
Log.d("ERROR", "Failed to get camera: " + e.getMessage());
}
}
}
if (mCamera != null) {
mCameraView = new CameraPreview(this, mCamera);//create a SurfaceView to show camera data
FrameLayout camera_view = (FrameLayout) findViewById(R.id.camera_view);
camera_view.addView(mCameraView);//add the SurfaceView to the layout
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addView();
ImageButton imgCapture = (ImageButton) findViewById(R.id.imgCapture);
imgCapture.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
WindowManager.LayoutParams layout = getWindow().getAttributes();
layout.screenBrightness = 1F;
getWindow().setAttributes(layout);
setContentView(R.layout.whitescreen);
new CountDownTimer(3000, 1000) {
public void onTick(long millisUntilFinished) {
}
public void onFinish() {
if (CameraPreview.safeToTakePicture) {
CameraPreview.safeToTakePicture = false;
mCamera.takePicture(null, null,
new PhotoHandler(getApplicationContext()));
}
setContentView(R.layout.activity_main);
addView();
}
}.start();
}
});
}
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
Log.d("Camera", "Camera found");
cameraId = i;
break;
}
}
return cameraId;
}
}
When pressing the capture button I switch the layout to an empty one(white layout), wait 3 seconds take a picture and then add the camera view again, here is my CameraPreview class:
#SuppressWarnings("deprecation")
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mCamera;
public static boolean safeToTakePicture = false;
public CameraPreview(Context context, Camera camera) {
super(context);
mCamera = camera;
mCamera.setDisplayOrientation(90);
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
}
#Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
Log.d("ERROR", "Camera error on surfaceCreated " + e.getMessage());
}
}
#Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i2, int i3) {
if (mHolder.getSurface() == null)
return;
try {
mCamera.stopPreview();
} catch (Exception e) {
Log.d("ERROR", "Trying the camera and it's not running");
}
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
safeToTakePicture = true;
} catch (IOException e) {
Log.d("ERROR", "Camera error on surfaceChanged " + e.getMessage());
}
}
#Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
mCamera.stopPreview();
mCamera.release();
}
}
I get the error Camera is being used after Camera.release was called a lot of times, for example when taking a picture:
07-02 14:49:35.561 19017-19017/davidandguy.com.selfielightcamera E/AndroidRuntime: FATAL EXCEPTION: main
Process: davidandguy.com.selfielightcamera, PID: 19017
java.lang.RuntimeException: Camera is being used after Camera.release() was called
at android.hardware.Camera.native_takePicture(Native Method)
at android.hardware.Camera.takePicture(Camera.java:1523)
at android.hardware.Camera.takePicture(Camera.java:1468)
at davidandguy.com.selfielightcamera.MainActivity$1$1.onFinish(MainActivity.java:65)
at android.os.CountDownTimer$1.handleMessage(CountDownTimer.java:127)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Or even when onResume() is called, for example, minimize the activity and then run again. I know I need to put somewhere onPause() and onResume() but I don't know where/how to implement it. thanks
This is really overdue but as I managed to solve a similar problem of mine a minute ago, I thought I'd contribute for the benefit of yourself and anyone else who might be desperately searching Stack.
I cant see your lifecycle code here , but heres what worked for me, surfaceDestroyed was empty in my case
Firstly, the cameraPreview
public void surfaceChanged(SurfaceHolder surfaceHolder, int format, int width, int height) {
try {
this.mCamera.setPreviewDisplay(surfaceHolder);
this.mCamera.startPreview();
} catch (Exception e) {
}
}
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
//TODO we need this here too because on SurfaceCreated we always need to open the camera, in case its released
this.mCamera.setPreviewDisplay(surfaceHolder);
this.mCamera.setDisplayOrientation(90);
//this.mCamera.startPreview();
} catch (IOException e) {
}
}
Next, the CameraActivity
#Override
public void onResume() {
super.onResume();
try{
mCamera = openFrontFacingCameraGingerbread();
// Add to Framelayout
this.mCameraPreview = new CameraPreview(this, this.mCamera);
mImage.removeAllViews();
this.mImage.addView(this.mCameraPreview);
}catch (RuntimeException ex){
}
}
#Override
public void onPause() {
super.onPause();
captureButton.setText("Begin Capture");
if(CameraActivity.this.timer !=null) {
CameraActivity.this.timer.cancel();
CameraActivity.this.timer.purge();
CameraActivity.this.timer = null;
}
if (mCamera != null) {
mCamera.setPreviewCallback(null);
mCameraPreview.getHolder().removeCallback(mCameraPreview);
mCamera.release();
mCamera = null;
}
}
#Override
protected void onDestroy(){
super.onDestroy();
releaseCameraAndPreview();
}
private void releaseCameraAndPreview() {
if (mCamera != null) {
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
if(mCameraPreview != null){
mCameraPreview.destroyDrawingCache();
mCameraPreview.mCamera = null;
}
}

Taking a picture with Android's Camera (API 19): onPictureTaken is not called

I'm being frustrated by something that should very simple: taking a picture using Android's camera API (with no preview). I've been following several answers from stackoverflow, but with no success.
Initially I followed this answer (#sush): How to take pictures from the camera without preview when my app starts?
But the PictureCallback was never called. I then followed this answer (#Alex Cohn):
You correctly found that takePicture() should not be called before startPreview() or immediately after it. (onPictureTaken never called)
Which led me to try three solutions.
Solution 1
The first solution places a callback in SurfaceHolder:
public class TestActivity extends Activity
{
private Camera mCamera;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
takeSnapShot();
}
#Override
protected void onPause()
{
clearCamera();
super.onPause();
}
private void takeSnapShot()
{
if (mCamera == null)
{
try { mCamera = Camera.open(); }
catch (Exception e) { e.printStackTrace(); }
SurfaceView surface = (SurfaceView) findViewById(R.id.preview);
surface.getHolder().addCallback(mSurfaceHolderCallback);
try { mCamera.setPreviewDisplay(surface.getHolder()); }
catch (IOException e) { e.printStackTrace(); }
mCamera.startPreview();
}
}
private final SurfaceHolder.Callback mSurfaceHolderCallback = new SurfaceHolder.Callback()
{
#Override
public void surfaceCreated(SurfaceHolder holder)
{
try
{
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
mCamera.takePicture(null, null, mPictureCallback);
}
catch (IOException e) { e.printStackTrace(); }
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {}
};
private final Camera.PictureCallback mPictureCallback = new Camera.PictureCallback()
{
#Override
public void onPictureTaken(byte[] data, Camera camera)
{
FileOutputStream outStream = null;
try
{
File dir_path =
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
File pictureFile = new File(dir_path, "snapshot-test.jpg");
outStream = new FileOutputStream(pictureFile);
outStream.write(data);
outStream.close();
}
catch (FileNotFoundException e) { e.printStackTrace(); }
catch (IOException e) { e.printStackTrace(); }
finally { clearCamera(); }
}
};
private void clearCamera()
{
if (mCamera != null)
{
try
{
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
catch (final Exception e) { e.printStackTrace(); }
}
}
This first solution works if I call takeSnapShot just once. Unfortunately, I can't get mSurfaceHolderCallback to run SurfaceCreated multiple times.
Solution 2
My second solution was to use PreviewCallback. In this solution I've re-used onPause:
public class TestActivity extends Activity
{
private Camera mCamera;
private boolean mReadyToTakePicture;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
takeSnapShot();
}
private void takeSnapShot()
{
if (mCamera == null)
{
try { mCamera = Camera.open(); }
catch (Exception e) { e.printStackTrace(); }
mCamera.setPreviewCallback(mRawPreviewCallback);
SurfaceView surface = (SurfaceView) findViewById(R.id.preview);
try { mCamera.setPreviewDisplay(surface.getHolder()); }
catch (IOException e) { e.printStackTrace(); }
mCamera.startPreview();
}
}
private final Camera.PreviewCallback mRawPreviewCallback = new Camera.PreviewCallback()
{
#Override
public void onPreviewFrame(byte [] rawData, Camera camera)
{
int rawDataLength = 0;
if (rawData != null) { rawDataLength = rawData.length; }
if (rawDataLength > 0 && !mReadyToTakePicture)
{
mReadyToTakePicture = true;
mCamera.takePicture(null, null, mPictureCallback);
}
else { mReadyToTakePicture = false; }
}
};
private final Camera.PictureCallback mPictureCallback = new Camera.PictureCallback()
{
#Override
public void onPictureTaken(byte[] data, Camera camera)
{
FileOutputStream outStream = null;
mReadyToTakePicture = false;
try
{
File dir_path =
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
File pictureFile = new File(dir_path, "snapshot-test.jpg");
outStream = new FileOutputStream(pictureFile);
outStream.write(data);
outStream.close();
}
catch (FileNotFoundException e) { e.printStackTrace(); }
catch (IOException e) { e.printStackTrace(); }
finally { clearCamera(); }
}
};
private void clearCamera()
{
if (mCamera != null)
{
try
{
mReadyToTakePicture = false;
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
catch (final Exception e) { e.printStackTrace(); }
}
}
}
In this solution both mRawPreviewCallback and mPictureCallback are never called.
Solution 3
My last example is using an AsyncTask that waits for a while before actually taking a picture. Hopefully this would give enough time for the preview to be set. In this solution I've re-used onPause and clearCamera:
public class TestActivity extends Activity
{
private Camera mCamera;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
takeSnapShot();
}
private void takeSnapShot()
{
if (mCamera == null)
{
try { mCamera = Camera.open(); }
catch (Exception e) { e.printStackTrace(); }
SurfaceView surface = (SurfaceView) findViewById(R.id.preview);
try { mCamera.setPreviewDisplay(surface.getHolder()); }
catch (IOException e) { e.printStackTrace(); }
mCamera.startPreview();
new CameraTask().execute(mCamera);
}
}
private class CameraTask extends AsyncTask<Camera, Void, Void>
{
protected String doInBackground(Camera... cameras)
{
try { Thread.sleep(1500); } catch (InterruptedException e)
{ e.printStackTrace(); }
mCamera = cameras[0];
mCamera.takePicture(null, null, mPictureCallback);
return mPicturePath;
}
private final Camera.PictureCallback mPictureCallback = new Camera.PictureCallback()
{
#Override
public void onPictureTaken(byte[] data, Camera camera)
{
FileOutputStream outStream = null;
try
{
File dir_path =
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
File pictureFile = new File(dir_path, "snapshot-test.jpg");
mPicturePath = pictureFile.getAbsolutePath();
outStream = new FileOutputStream(pictureFile);
outStream.write(data);
outStream.close();
}
catch (FileNotFoundException e) { e.printStackTrace(); }
catch (IOException e) { e.printStackTrace(); }
finally { clearCamera(); }
}
};
}
}
As with solution 2, onPictureTaken is never called.
In all examples the layout of my SurfaceView is as follows (for no preview):
<SurfaceView
android:id="#+id/preview"
android:layout_width="1dp"
android:layout_height="1dp"></SurfaceView>
At this point I'm running out of ideas. My first example was successful in taking one picture, so if I could at least force the app to run surfaceCreated multiple times, it should work. Any ideas?
Ok so I have faced this issue before on gingerbread devices.
Do the following:
mCamera.takePicture(null, null, new Camera.PictureCallback() {
#Override
public void onPictureTaken(final byte[] originalData, Camera camera) {
// logic here
});
instead of:
mCamera.takePicture(null, null,myCallback);
private PictureCallback mPicallback = new PictureCallback(){
};

Where in the code set camera parameters?

I'm using this to use android camera:
public class Login extends Activity implements SurfaceHolder.Callback {
public int idCamera(int id) {
if (id == 0) { id = 1; } else { id = 0; }
int tcam = Camera.getNumberOfCameras();
if (tcam == 1) { id = 0; }
return id;
}
public class idCameraV {
public int id;
}
public static class camHolder {
public static SurfaceHolder id;
}
private Camera camera;
private SurfaceView surfaceView;
static String senha2;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
final idCameraV idCam = new idCameraV();
idCam.id = 0;
camera = Camera.open(idCam.id);
Camera.Parameters parametro = camera.getParameters(); // WORKS OK
parametro.setFlashMode("on"); // WORKS OK
camera.setParameters(parametro); // WORKS OK
surfaceView = (SurfaceView) findViewById(R.id.preview);
surfaceView.getHolder().addCallback(this);
final ImageButton button1 = (ImageButton) findViewById(R.id.bt_camera);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
camera.stopPreview();
camera.release();
idCam.id = idCamera(idCam.id);
camera = Camera.open(idCam.id);
Camera.Parameters parametro = camera.getParameters();
parametro.setFlashMode("on"); // THIS LINE AND ABOVE WORKS. I CAN READ BY GETFLASHMODE
camera.setParameters(parametro); // ERROR IN HERE
camera.startPreview();
try {
camera.setPreviewDisplay(camHolder.id);
} catch (IOException e) {
e.printStackTrace();
}
}
});
final ImageButton button2 = (ImageButton) findViewById(R.id.bt_login);
button2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
EditText senha = (EditText)findViewById(R.id.senha);
senha2 = senha.getText().toString();
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
RelativeLayout aviso = (RelativeLayout) findViewById(R.id.aguarde);
aviso.setVisibility(View.VISIBLE);
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
String coordenadas = GPS.coordenadas(locationManager);
String android_id = Secure.getString(getBaseContext().getContentResolver(), Secure.ANDROID_ID);
camera.takePicture(null, null, new TiraFoto(getApplicationContext(), android_id, coordenadas, aviso, connMgr, "LOGIN_", camera));
}
});
}
#Override
protected void onDestroy() {
super.onDestroy();
if (camera != null) { camera.release(); }
}
#Override
protected void onPause() {
super.onPause();
if (camera != null) { camera.stopPreview(); }
}
#SuppressWarnings("static-access")
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(holder);
camera.startPreview();
final camHolder camHolderId = new camHolder();
camHolderId.id = holder;
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (holder.getSurface() != null) {
try {
camera.stopPreview();
} catch (Exception e) {
}
try {
camera.setPreviewDisplay(holder);
camera.startPreview();
} catch (IOException e) {
e.printStackTrace();
}
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {}
}
It works ok, but when I do the camera swap, the app freezes. I'm setting the flashmode when I open the camera first time, and it works, but when I do the swap, I get a set parameter error. Where I must set this parameters?
The front camera doesn't support flash mode, maybe the code as below can work
if(idCam.id == 0)
parametro.setFlashMode("on");
According to your question, please refer to the Android Developers: Camera
Basically, you'll need to set the camera parameters inside surfacedChanged method
And here for your information, I copy/paste the related code:
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// If your preview can change or rotate, take care of those events here.
// Make sure to stop the preview before resizing or reformatting it.
if (mHolder.getSurface() == null){
// preview surface does not exist
return;
}
// stop preview before making changes
try {
mCamera.stopPreview();
} catch (Exception e){
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e){
Log.d(TAG, "Error starting camera preview: " + e.getMessage());
}
}
Please let me know if it works

android startVideo stretched and in landscape mode

I have some problem in my code. I must start camera and capture it , so here is my code, and my problem is that camera starting with some strange view, like landscape mode and stretched.
mVideoCaptureView = (SurfaceView) findViewById(R.id.cameraView);
SurfaceHolder videoCaptureViewHolder = mVideoCaptureView.getHolder();
videoCaptureViewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
videoCaptureViewHolder.addCallback(new Callback() {
public void surfaceDestroyed(SurfaceHolder holder) {
}
public void surfaceCreated(SurfaceHolder holder) {
startVideo();
}
public void surfaceChanged(SurfaceHolder holder, int format,
int width, int height) {
}
});
and the startVideo() function
private void startVideo() {
if(mCamera != null) return;
SurfaceHolder videoCaptureViewHolder = null;
try {
mCamera = Camera.open();
} catch (RuntimeException e) {
Log.e("CameraTest", "Camera Open filed");
return;
}
mCamera.setErrorCallback(new ErrorCallback() {
public void onError(int error, Camera camera) {
}
});
Camera.Parameters parameters = mCamera.getParameters();
parameters.setPreviewFrameRate(30);
mCamera.setParameters(parameters);
if (null != mVideoCaptureView)
videoCaptureViewHolder = mVideoCaptureView.getHolder();
try {
mCamera.setPreviewDisplay(videoCaptureViewHolder);
} catch (Throwable t) {
}
try {
mCamera.startPreview();
} catch (Throwable e) {
mCamera.release();
mCamera = null;
return;
}
}
Also I must add my own buttons , ImageButtons in camera view
Thanks
Regards
sorry for English
There was some function for Camera `camera.setDisplayOrientation(90); I got it from here

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