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Not taking picture in background using textureview and camera2 api

Here is my Camera2Manger code
i have added permissions in manifist file and take permissions in run time but still this code is not working i am calling this class in my other class like
Camera2Manager camera2Manager = new Camera2Manager(mTextureView,GestureSelfUnlockActivity.this);
camera2Manager.initCamera();
and my Manager class is below i have checked code surfaceviewlistener is not working anyone can help me out thanks
public class Camera2Manager {
private static final int SETIMAGE = 1;
private static final int MOVE_FOCK = 2;
private TextureView mTextureView;
private Context mContext;
private Handler mHandler;
private Handler mUIHandler;
private ImageReader mImageReader;
private CaptureRequest.Builder mPreViewBuidler;
private CameraCaptureSession mCameraSession;
private CameraCharacteristics mCameraCharacteristics;
private Size mPreViewSize;
private Rect maxZoomrect;
private int maxRealRadio;
// camera zoom related
private Rect picRect;
public Camera2Manager(TextureView textureView, Context context) {
mTextureView = textureView;
mContext = context;
}
public void initCamera() {
mUIHandler = new Handler(new InnerCallBack());
mTextureView.setSurfaceTextureListener(mSurfacetextlistener);
// Toast.makeText(mContext, "Caremmaa", Toast.LENGTH_SHORT).show();
}
#SuppressLint("NewApi")
private final ImageReader.OnImageAvailableListener onImageAvaiableListener = new ImageReader.OnImageAvailableListener() {
#Override
public void onImageAvailable(ImageReader imageReader) {
mHandler.post(new ImageSaver(imageReader.acquireNextImage()));
}
};
private Surface surface;
#SuppressLint("NewApi")
private final CameraDevice.StateCallback cameraOpenCallBack = new CameraDevice.StateCallback() {
#Override
public void onOpened(CameraDevice cameraDevice) {
try {
mPreViewBuidler = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
SurfaceTexture texture = mTextureView.getSurfaceTexture();
texture.setDefaultBufferSize(mPreViewSize.getWidth(), mPreViewSize.getHeight());
surface = new Surface(texture);
mPreViewBuidler.addTarget(surface);
cameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface()), mSessionStateCallBack, mHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
#Override
public void onDisconnected(CameraDevice cameraDevice) {
}
#Override
public void onError(CameraDevice cameraDevice, int i) {
}
};
#SuppressLint("NewApi")
private final CameraCaptureSession.StateCallback mSessionStateCallBack = new CameraCaptureSession.StateCallback() {
#Override
public void onConfigured(CameraCaptureSession cameraCaptureSession) {
try {
mCameraSession = cameraCaptureSession;
cameraCaptureSession.setRepeatingRequest(mPreViewBuidler.build(), null, mHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
#Override
public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) {
}
};
private final TextureView.SurfaceTextureListener mSurfacetextlistener = new TextureView
.SurfaceTextureListener() {
#SuppressLint("NewApi")
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int i, int i1) {
HandlerThread thread = new HandlerThread("Camera2");
thread.start();
mHandler = new Handler(thread.getLooper());
CameraManager manager = (CameraManager) mContext.getSystemService(Context.CAMERA_SERVICE);
String cameraid = CameraCharacteristics.LENS_FACING_FRONT + "";
Toast.makeText(mContext, "Caremmaa", Toast.LENGTH_SHORT).show();
try {
mCameraCharacteristics = manager.getCameraCharacteristics(cameraid);
//The area of ​​the screen sensor, in pixels.
maxZoomrect = mCameraCharacteristics.get(CameraCharacteristics.SENSOR_INFO_ACTIVE_ARRAY_SIZE);
//Maximum digital zoom
maxRealRadio = mCameraCharacteristics.get(CameraCharacteristics.SCALER_AVAILABLE_MAX_DIGITAL_ZOOM).intValue();
picRect = new Rect(maxZoomrect);
StreamConfigurationMap map = mCameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
Size largest = Collections.max(Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)
), new CompareSizeByArea());
mPreViewSize = map.getOutputSizes(SurfaceTexture.class)[0];
mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG, 5);
mImageReader.setOnImageAvailableListener(onImageAvaiableListener, mHandler);
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
manager.openCamera(cameraid, cameraOpenCallBack, mHandler);
//Set the monitor for clicking and taking pictures
takePhoto();
} catch (CameraAccessException e) {
ToastUtil.showToast(e.getMessage());
e.printStackTrace();
}
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1) {
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
return false;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
}
};
#SuppressLint("NewApi")
private void takePhoto() {
try {
Toast.makeText(mContext, "Camera started", Toast.LENGTH_SHORT).show();
mCameraSession.setRepeatingRequest(initDngBuilder().build(), null, mHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
#SuppressLint("NewApi")
private CaptureRequest.Builder initDngBuilder() {
CaptureRequest.Builder captureBuilder = null;
try {
captureBuilder = mCameraSession.getDevice().createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
captureBuilder.addTarget(mImageReader.getSurface());
captureBuilder.addTarget(surface);
// Required for RAW capture
captureBuilder.set(CaptureRequest.STATISTICS_LENS_SHADING_MAP_MODE, CaptureRequest.STATISTICS_LENS_SHADING_MAP_MODE_ON);
captureBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_OFF);
captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
captureBuilder.set(CaptureRequest.SENSOR_EXPOSURE_TIME, (long) ((214735991 - 13231) / 2));
captureBuilder.set(CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, 0);
captureBuilder.set(CaptureRequest.SENSOR_SENSITIVITY, (10000 - 100) / 2);//Set ISO, Sensitivity
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, 90);
//set 30 frames per second
CaptureRequest mCaptureRequest = captureBuilder.build();
mCameraSession.capture(mCaptureRequest, null, mHandler); //take a picture
CameraManager cameraManager = (CameraManager) mContext.getSystemService(Context.CAMERA_SERVICE);
String cameraid = CameraCharacteristics.LENS_FACING_FRONT + "";
CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(cameraid);
Range<Integer>[] fps = cameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES);
captureBuilder.set(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE, fps[fps.length - 1]);
} catch (CameraAccessException | NullPointerException e) {
e.printStackTrace();
}
return captureBuilder;
}
private class ImageSaver implements Runnable {
Image reader;
public ImageSaver(Image reader) {
this.reader = reader;
}
#SuppressLint("NewApi")
#Override
public void run() {
File dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS+"/lock").getAbsoluteFile();
if (!dir.exists()) {
dir.mkdirs();
}
File file = new File(dir, System.currentTimeMillis() + ".jpg");
FileOutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
ByteBuffer buffer = reader.getPlanes()[0].getBuffer();
byte[] buff = new byte[buffer.remaining()];
buffer.get(buff);
BitmapFactory.Options ontain = new BitmapFactory.Options();
ontain.inSampleSize = 50;
Bitmap bm = BitmapFactory.decodeByteArray(buff, 0, buff.length, ontain);
Message.obtain(mUIHandler, SETIMAGE, bm).sendToTarget();
outputStream.write(buff);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
reader.close();
}
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
private class InnerCallBack implements Handler.Callback {
#SuppressLint("NewApi")
#Override
public boolean handleMessage(Message message) {
switch (message.what) {
case SETIMAGE:
Bitmap bm = (Bitmap) message.obj;
//preview avatar
break;
case MOVE_FOCK:
mPreViewBuidler.set(CaptureRequest.SCALER_CROP_REGION, picRect);
try {
mCameraSession.setRepeatingRequest(mPreViewBuidler.build(), null,
mHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
break;
}
return false;
}
}
#SuppressLint("NewApi")
public static class CompareSizeByArea implements java.util.Comparator<Size> {
#Override
public int compare(Size lhs, Size rhs) {
return Long.signum((long) lhs.getWidth() * lhs.getHeight() - (long) rhs.getWidth() * rhs.getHeight());
}
}
}
But this code is not working.

Android textureView stretched

SurfaceTexture preview is stretched! I'm developing a camera2 app. Every device is working bad. The preview for video and photo is stretched.
public class CamActivity extends AppCompatActivity {
private static final int REQUEST_LOCATION = 1;
LocationManager locationManager;
Animation animFadeOut, textAnimFadeOut;
ImageView viewFadeOut;
TextView textFadeOut, Lado;
private TextureView textureView;
private FloatingActionButton btnCapture;
//Check state orientation of output image
private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
static {
ORIENTATIONS.append(Surface.ROTATION_0,0);
}
private String cameraId;
private CameraDevice cameraDevice;
private CameraCaptureSession cameraCaptureSessions;
private CaptureRequest.Builder captureRequestBuilder;
private Size imageDimension;
private ImageReader imageReader;
//Save to FILE
private File file;
private static final int REQUEST_CAMERA_PERMISSION = 200;
private boolean mFlashSupported;
private Handler mBackgroundHandler;
private HandlerThread mBackgroundThread;
CameraDevice.StateCallback stateCallback = new CameraDevice.StateCallback() {
#Override
public void onOpened(#NonNull CameraDevice camera) {
cameraDevice = camera;
createCameraPreview();
}
#Override
public void onDisconnected(#NonNull CameraDevice cameraDevice) {
cameraDevice.close();
}
#Override
public void onError(#NonNull CameraDevice cameraDevice, int i) {
cameraDevice.close();
cameraDevice=null;
}
};
#SuppressLint("WrongViewCast")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cam);
ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);
Lado = (TextView)findViewById(R.id.lado_armadilha);
Lado.setText(getIntent().getStringExtra("lado_armadilha"));
viewFadeOut = (ImageView)findViewById(R.id.viewFadeOut);
animFadeOut = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.fade);
viewFadeOut.startAnimation(animFadeOut);
textFadeOut =(TextView)findViewById(R.id.textFadeOut);
textAnimFadeOut = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.fade_text);
textFadeOut.startAnimation(textAnimFadeOut);
textureView = (TextureView)findViewById(R.id.textureView);
//From Java 1.4 , you can use keyword 'assert' to check expression true or false
assert textureView != null;
textureView.setSurfaceTextureListener(textureListener);
btnCapture = (FloatingActionButton) findViewById(R.id.btnCapture);
btnCapture.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
takePicture();
}
});
}
private void takePicture() {
if(cameraDevice == null)
return;
CameraManager manager = (CameraManager)getSystemService(Context.CAMERA_SERVICE);
try {
CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraDevice.getId());
Size[] jpegSizes = null;
if(characteristics != null)
jpegSizes = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP)
.getOutputSizes(ImageFormat.JPEG);
Log.i("JPEG_SIZE", "" + jpegSizes[0].getWidth());
Log.i("JPEG_SIZE", "" + jpegSizes[0].getHeight());
//Capture image with custom size
int width = jpegSizes[0].getWidth();
int height =jpegSizes[0].getHeight();
if(jpegSizes == null && jpegSizes.length < 0)
{
width = jpegSizes[0].getWidth();
height = jpegSizes[0].getHeight();
}
final ImageReader reader = ImageReader.newInstance(width,height,ImageFormat.JPEG,1);
List<Surface> outputSurface = new ArrayList<>(2);
outputSurface.add(reader.getSurface());
outputSurface.add(new Surface(textureView.getSurfaceTexture()));
final CaptureRequest.Builder captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
captureBuilder.addTarget(reader.getSurface());
captureBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
//Check orientation base on device
int rotation = getWindowManager().getDefaultDisplay().getRotation();
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION,ORIENTATIONS.get(rotation));
file = new File(getIntent().getStringExtra(MediaStore.EXTRA_OUTPUT));
ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener() {
#Override
public void onImageAvailable(ImageReader imageReader) {
Image image = null;
try {
image = reader.acquireNextImage();
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.capacity()];
buffer.get(bytes);
save(bytes);
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
Log.e("ioexception", e.getMessage());
}
finally {
if(image != null)
image.close();
}
Intent intent = new Intent();
intent.putExtra("Bitmap",file.getAbsolutePath());
setResult(1,intent);
finish();
}
private void save(byte[] bytes) throws IOException {
OutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
outputStream.write(bytes);
} finally {
if(outputStream != null)
outputStream.close();
}
}
};
reader.setOnImageAvailableListener(readerListener,mBackgroundHandler);
final CameraCaptureSession.CaptureCallback captureListener = new CameraCaptureSession.CaptureCallback() {
#Override
public void onCaptureCompleted(#NonNull CameraCaptureSession session, #NonNull CaptureRequest request, #NonNull TotalCaptureResult result) {
super.onCaptureCompleted(session, request, result);
Toast.makeText(CamActivity.this, "Saved "+file, Toast.LENGTH_SHORT).show();
}
};
cameraDevice.createCaptureSession(outputSurface, new CameraCaptureSession.StateCallback() {
#Override
public void onConfigured(#NonNull CameraCaptureSession cameraCaptureSession) {
try {
cameraCaptureSession.capture(captureBuilder.build(),captureListener,mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
#Override
public void onConfigureFailed(#NonNull CameraCaptureSession cameraCaptureSession) {
}
},mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private void createCameraPreview() {
try {
SurfaceTexture texture = textureView.getSurfaceTexture();
assert texture != null;
texture.setDefaultBufferSize(imageDimension.getWidth(), imageDimension.getHeight());
Surface surface = new Surface(texture);
captureRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
captureRequestBuilder.addTarget(surface);
cameraDevice.createCaptureSession(Arrays.asList(surface), new CameraCaptureSession.StateCallback() {
#Override
public void onConfigured(#NonNull CameraCaptureSession cameraCaptureSession) {
if (cameraDevice == null)
return;
cameraCaptureSessions = cameraCaptureSession;
updatePreview();
}
#Override
public void onConfigureFailed(#NonNull CameraCaptureSession cameraCaptureSession) {
Toast.makeText(CamActivity.this, "Changed", Toast.LENGTH_SHORT).show();
}
}, null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private void updatePreview() {
if(cameraDevice == null)
Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show();
captureRequestBuilder.set(CaptureRequest.CONTROL_MODE,CaptureRequest.CONTROL_MODE_AUTO);
try {
cameraCaptureSessions.setRepeatingRequest(captureRequestBuilder.build(),null,mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private void openCamera() {
CameraManager manager = (CameraManager)getSystemService(Context.CAMERA_SERVICE);
try {
cameraId = manager.getCameraIdList()[0];
CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);
StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
assert map != null;
imageDimension = map.getOutputSizes(SurfaceTexture.class)[0];
//Check realtime permission if run higher API 23
if(ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
{
ActivityCompat.requestPermissions(this,new String[]{
Manifest.permission.CAMERA,
Manifest.permission.WRITE_EXTERNAL_STORAGE
},REQUEST_CAMERA_PERMISSION);
return;
}
manager.openCamera(cameraId,stateCallback,null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
TextureView.SurfaceTextureListener textureListener = new TextureView.SurfaceTextureListener() {
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int i, int i1) {
openCamera();
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1) {
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
return false;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
}
};
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
if(requestCode == REQUEST_CAMERA_PERMISSION)
{
if(grantResults[0] != PackageManager.PERMISSION_GRANTED)
{
Toast.makeText(this, "You can't use camera without permission", Toast.LENGTH_SHORT).show();
finish();
}
}
}
#Override
protected void onResume() {
super.onResume();
startBackgroundThread();
if(textureView.isAvailable())
openCamera();
else
textureView.setSurfaceTextureListener(textureListener);
}
#Override
protected void onPause() {
stopBackgroundThread();
super.onPause();
}
private void stopBackgroundThread() {
mBackgroundThread.quitSafely();
try {
mBackgroundThread.join();
mBackgroundThread= null;
mBackgroundHandler = null;
} catch (InterruptedException e) {
e.printStackTrace();
}
}
private void startBackgroundThread() {
mBackgroundThread = new HandlerThread("Camera Background");
mBackgroundThread.start();
mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
}
}

A TextureView will by default just stretch whatever images you give it into its view dimensions. So if you give it a 1920x1080 buffer (16:9 aspect ratio) but its dimensions are 1600x1200 (4:3), you'll get a vertically squished image shown.
Take a look at the AutoFitTextureView in the Camera2Basic sample from Google.
It tries to ensure that its aspect ratio matches that of the camera, but it does require you to set its layout parameters correctly (and it has to be in a layout container that allows its children some flexibility in sizing).

why video is getting stretched in camera2 API?

I am building a video camera app which is always be in landscape mode and always record from front camera.
But when I am recording the video it looks like stretched.How to solve it?
Where I am making mistake??
public class MainActivity extends AppCompatActivity {
public static final int REQUEST_CAMERA_PERMISSION_RESULT = 0;
public static final int REQUEST_WRITE_EXTERNAL_STORAGE_PERMISSION_RESULT = 1;
private TextureView mTextureView;
//public ImageView mImageView;
private TextureView.SurfaceTextureListener mSurfaceTextureListener = new TextureView.SurfaceTextureListener() {
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
//Toast.makeText(getApplicationContext(),"TextureView is Available",Toast.LENGTH_SHORT).show();
setupCamera(width, height);
connectCamera();
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
return false;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
}
};
private CameraDevice mCameraDevice;
private CameraDevice.StateCallback mCameraDeviceStateCallback;
{
mCameraDeviceStateCallback = new CameraDevice.StateCallback() {
#Override
public void onOpened(CameraDevice camera) {
mCameraDevice = camera;
mMediaRecorder = new MediaRecorder();
if (mIsRecording) {
try {
createVideoFileName();
} catch (IOException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
startRecord();
mMediaRecorder.start();
runOnUiThread(new Runnable() {
#Override
public void run() {
mChronometer.setBase(SystemClock.elapsedRealtime());
mChronometer.setVisibility(View.VISIBLE);
mChronometer.start();
}
});
} else {
startPreview();
}
//Toast.makeText(getApplicationContext(),"Camera connected",Toast.LENGTH_SHORT).show();
}
#Override
public void onDisconnected(CameraDevice camera) {
camera.close();
mCameraDevice = null;
}
#Override
public void onError(CameraDevice camera, int i) {
}
};
}
private HandlerThread mBackgroundHandlerThread;
private Handler mBackgroundHandler;
private String mCameraId;
private Size mPreviewSize;
private Size mVideoSize;
private MediaRecorder mMediaRecorder;
private Chronometer mChronometer;
private ImageView thumb;
//private String V1, V2, V3, V4, V5;
// private Map<String, String> mapA = new HashMap<>();
// private ImageView[] IMGS = {mImageView1, mImageView2, mImageView3, mImageView4, mImageView5};
private int mTotalRotation;
private CaptureRequest.Builder mCaptureRequestBuilder;
public static int count;
public static int max = 5;
private ImageButton mRecordImageButton;
private boolean mIsRecording = false;
public static File mVideoFolder;
private static File mRawVideoFolder;
public static String mVideoFileName;
//Test
private List<Bitmap> bitMapsAvailable = new ArrayList<>();
private List<String> bitMapsFilePath = new ArrayList<>();
private int bitMapIndex;
CameraCaptureSession storedSession;
private ArrayAdapter bitMapAdapter;
private ArrayAdapter bitMapFileAdapter;
private static SparseIntArray ORIENTATIONS = new SparseIntArray();
public int index;
static {
ORIENTATIONS.append(Surface.ROTATION_0, 0);
ORIENTATIONS.append(Surface.ROTATION_90, 90);
ORIENTATIONS.append(Surface.ROTATION_180, 180);
ORIENTATIONS.append(Surface.ROTATION_270, 270);
}
private static class CompareSizeByArea implements Comparator<Size> {
#Override
public int compare(Size lhs, Size rhs) {
return Long.signum((long) lhs.getWidth() * lhs.getHeight() / (long) rhs.getWidth() * rhs.getHeight());
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
createVideoFolder();
mMediaRecorder = new MediaRecorder();
mChronometer = (Chronometer) findViewById(R.id.chronometer);
mTextureView = (TextureView) findViewById(R.id.textureView);
mRecordImageButton = (ImageButton) findViewById(R.id.videoButton);
mRecordImageButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mIsRecording) {
mChronometer.stop();
mChronometer.setVisibility(View.INVISIBLE);
mIsRecording = false;
mRecordImageButton.setImageResource(R.mipmap.start_recording);
//Toast.makeText(getApplicationContext(),"Started",Toast.LENGTH_SHORT).show();
if(storedSession != null){
try {
storedSession.stopRepeating();
storedSession.abortCaptures();
}catch (CameraAccessException e){
throw new RuntimeException(e.getMessage());
}
}
mMediaRecorder.stop();
mMediaRecorder.reset();
startPreview();
//Create bitmap with current video file path
Bitmap bitMap = ThumbnailUtils.createVideoThumbnail(mVideoFileName, MediaStore.Video.Thumbnails.MICRO_KIND);
//Add bitmap to array list
bitMapsAvailable.add(bitMap);
bitMapsFilePath.add(mVideoFileName);
// Shows thumbnails
showThumbnails();
} else {
checkWriteStoragePermission();
}
}
});
}
private void showThumbnails() {
LinearLayout layout = (LinearLayout) findViewById(R.id.thumbnails);
bitMapAdapter = new ArrayAdapter(this, R.layout.activity_main, bitMapsAvailable);
bitMapFileAdapter = new ArrayAdapter(this, R.layout.activity_main, bitMapsFilePath);
bitMapIndex = 0;
if (layout.getChildCount() > 0) {
layout.removeAllViews();
}
for (Bitmap eachBitMap : bitMapsAvailable) {
bitMapIndex++;
ImageView thumb = new ImageView(this);
thumb.setId(new Integer(bitMapIndex+ 17));
thumb.setLayoutParams(new android.view.ViewGroup.LayoutParams(100, 80));
thumb.setImageBitmap(eachBitMap);
// Adds the view to the layout
thumb.setOnClickListener(previewThumb(thumb));
layout.addView(thumb);
}
}
View.OnClickListener previewThumb(final ImageView imageview) {
return new View.OnClickListener() {
public void onClick(View arg0) {
index = imageview.getId()-18;
imageview.setBackgroundColor(0xff999999);
// Start NewActivity.class
Intent myIntent = new Intent(MainActivity.this,
VideoViewActivity.class);
Bundle bundle = new Bundle();
bundle.putStringArrayList("bitMapsAvailable", new ArrayList(bitMapsAvailable));
bundle.putStringArrayList("bitMapsFilePath", new ArrayList(bitMapsFilePath));
//Add your data to bundle
bundle.putInt("urlIndex", index);
myIntent.putExtras(bundle);
bitMapAdapter.notifyDataSetChanged();
bitMapFileAdapter.notifyDataSetChanged();
// startActivity(myIntent);
startActivityForResult(myIntent, 111);
}
};
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == 111) {
int indexToBeDeleted = data.getIntExtra("indexToBeDeleted",index);
//bitMapsFilePath.remove(indexToBeDeleted);
bitMapsAvailable.remove(indexToBeDeleted);
}
}
}
#Override
protected void onResume() {
super.onResume();
startBackgroundThread();
if (mTextureView.isAvailable()) {
setupCamera(mTextureView.getWidth(), mTextureView.getHeight());
connectCamera();
} else {
mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
}
}
#Override
public void onRequestPermissionsResult(int requestCode, String[] permission, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permission, grantResults);
if (requestCode == REQUEST_CAMERA_PERMISSION_RESULT) {
if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(getApplicationContext(), "Application will not run without camera service", Toast.LENGTH_SHORT).show();
}
if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(getApplicationContext(), "Application will not have audio on record ", Toast.LENGTH_SHORT).show();
}
}
if (requestCode == REQUEST_WRITE_EXTERNAL_STORAGE_PERMISSION_RESULT) {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
mIsRecording = true;
mRecordImageButton.setImageResource(R.mipmap.ic_launcher);
try {
createVideoFileName();
} catch (IOException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
Toast.makeText(this, "Permission Successfully Granted", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "App needs to save video to run", Toast.LENGTH_SHORT).show();
}
}
}
#Override
protected void onPause() {
closeCamera();
stopBackgroundThread();
super.onPause();
}
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
View decorView = getWindow().getDecorView();
if (hasFocus) {
decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
}
}
private void setupCamera(int width, int height) {
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
for (String cameraId : cameraManager.getCameraIdList()) {
CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(cameraId);
if (cameraCharacteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_BACK) {
continue;
}
StreamConfigurationMap map = cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
//int deviceOrientation = getWindowManager().getDefaultDisplay().getRotation();
mTotalRotation = sensorToDeviceRotation(cameraCharacteristics);
boolean swapRotation = mTotalRotation == 90 || mTotalRotation == 270;
int rotateWidth = width;
int rotateHeight = height;
if (swapRotation) {
rotateWidth = height;
rotateHeight = width;
}
mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class), rotateWidth, rotateHeight);
mVideoSize = chooseOptimalSize(map.getOutputSizes(MediaRecorder.class), rotateWidth, rotateHeight);
mCameraId = cameraId;
return;
}
} catch (CameraAccessException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
}
private void connectCamera() {
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
cameraManager.openCamera(mCameraId, mCameraDeviceStateCallback, mBackgroundHandler);
} else {
if (shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) {
Toast.makeText(this, "Video app required access to camera", Toast.LENGTH_SHORT).show();
}
requestPermissions(new String[]{android.Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO}, REQUEST_CAMERA_PERMISSION_RESULT);
}
} else {
cameraManager.openCamera(mCameraId, mCameraDeviceStateCallback, mBackgroundHandler);
}
} catch (CameraAccessException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
}
private void startRecord() {
if (this.bitMapsAvailable.size() < max) {
try {
setupMediaRecorder();
SurfaceTexture surfaceTexture = mTextureView.getSurfaceTexture();
surfaceTexture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
Surface previewSurface = new Surface(surfaceTexture);
Surface recordSurface = mMediaRecorder.getSurface();
mCaptureRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
mCaptureRequestBuilder.addTarget(previewSurface);
mCaptureRequestBuilder.addTarget(recordSurface);
mCameraDevice.createCaptureSession(Arrays.asList(previewSurface, recordSurface), new CameraCaptureSession.StateCallback() {
#Override
public void onConfigured(CameraCaptureSession session) {
try {
session.setRepeatingRequest(mCaptureRequestBuilder.build(), null, null);
storedSession = session;
} catch (CameraAccessException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
}
#Override
public void onConfigureFailed(CameraCaptureSession session) {
}
}, null);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
} else {
}
}
private void startPreview() {
SurfaceTexture surfaceTexture = mTextureView.getSurfaceTexture();
surfaceTexture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
Surface previewSurface = new Surface(surfaceTexture);
try {
mCaptureRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
mCaptureRequestBuilder.addTarget(previewSurface);
mCameraDevice.createCaptureSession(Arrays.asList(previewSurface), new CameraCaptureSession.StateCallback() {
#Override
public void onConfigured(CameraCaptureSession session) {
try {
session.stopRepeating();
session.abortCaptures();
session.setRepeatingRequest(mCaptureRequestBuilder.build(), null, mBackgroundHandler);
} catch (CameraAccessException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
}
#Override
public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) {
Toast.makeText(getApplicationContext(), "Unable to setup Camera Preview", Toast.LENGTH_SHORT).show();
}
}, null);
} catch (CameraAccessException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
}
private void closeCamera() {
if (mCameraDevice != null) {
mCameraDevice.close();
mCameraDevice = null;
}
}
private void startBackgroundThread() {
mBackgroundHandlerThread = new HandlerThread("AuthorTV");
mBackgroundHandlerThread.start();
mBackgroundHandler = new Handler(mBackgroundHandlerThread.getLooper());
}
private void stopBackgroundThread() {
mBackgroundHandlerThread.quitSafely();
try {
mBackgroundHandlerThread.join();
mBackgroundHandlerThread = null;
mBackgroundHandler = null;
} catch (InterruptedException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
}
private static int sensorToDeviceRotation(CameraCharacteristics cameraCharacteristics) {
int sensorOrientation = cameraCharacteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
// deviceOrientation = ORIENTATIONS.get(deviceOrientation);
return (sensorOrientation + 180 + 360) % 360;
}
private static Size chooseOptimalSize(Size[] choices, int width, int height) {
List<Size> bigEnough = new ArrayList<Size>();
for (Size option : choices) {
if (option.getHeight() == option.getWidth() * height / width && option.getWidth() >= width && option.getHeight() >= height) {
bigEnough.add(option);
}
}
if (bigEnough.size() > 0) {
return Collections.min(bigEnough, new CompareSizeByArea());
} else {
return choices[0];
}
}
private void setupMediaRecorder() throws IOException {
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mMediaRecorder.setOutputFile(mVideoFileName);
mMediaRecorder.setVideoEncodingBitRate(1000000);
mMediaRecorder.setVideoFrameRate(30);
mMediaRecorder.setVideoSize(mVideoSize.getWidth(), mVideoSize.getHeight());
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
mMediaRecorder.setOrientationHint(mTotalRotation);
mMediaRecorder.prepare();
}

chooseOptimalSize needs to be adjusted and different for mPreviewSize and mVideoSize. Check this link Camera2VideoFragment.java

Lacking privileges to access camera service in Android 6.0

I am using Camera2API in Android 6.0. I was done without error in Android 5.0. However, when I used my code in the Android 6.0, I have a issue. The issue is that sometime I can open the camera successfully and take picture. However, sometime the camera cannot open and it has error
java.lang.SecurityException: Lacking privileges to access camera service
at android.hardware.camera2.utils.CameraBinderDecorator.throwOnError(CameraBinderDecorator.java:108)
I added the runtime permission as follows:
String[] PERMISSIONS = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.CAMERA};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
if(!hasAllPermissions(this, PERMISSIONS)){
ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);
}
}
public static boolean hasAllPermissions(Context context, String... permissions) {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {
for (String permission : permissions) {
if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
}
return true;
}
This is all log
FATAL EXCEPTION: main
Process: com.example.camera2api, PID: 5376
java.lang.SecurityException: Lacking privileges to access camera service
at android.hardware.camera2.utils.CameraBinderDecorator.throwOnError(CameraBinderDecorator.java:108)
at android.hardware.camera2.utils.CameraBinderDecorator$CameraBinderDecoratorListener.onAfterInvocation(CameraBinderDecorator.java:73)
at android.hardware.camera2.utils.Decorator.invoke(Decorator.java:81)
at java.lang.reflect.Proxy.invoke(Proxy.java:393)
at $Proxy2.cancelRequest(Unknown Source)
at android.hardware.camera2.impl.CameraDeviceImpl.stopRepeating(CameraDeviceImpl.java:926)
at android.hardware.camera2.impl.CameraCaptureSessionImpl.close(CameraCaptureSessionImpl.java:378)
at android.hardware.camera2.impl.CameraCaptureSessionImpl$2.onDisconnected(CameraCaptureSessionImpl.java:514)
at android.hardware.camera2.impl.CameraDeviceImpl$7.run(CameraDeviceImpl.java:228)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7229)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
update: For someone who want to look at my full code. I upload my full code here
public class AndroidCamera extends AppCompatActivity {
private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
static {
ORIENTATIONS.append(Surface.ROTATION_0, 90);
ORIENTATIONS.append(Surface.ROTATION_90, 0);
ORIENTATIONS.append(Surface.ROTATION_180, 270);
ORIENTATIONS.append(Surface.ROTATION_270, 180);
}
private static final String TAG = "Camera2App";
private String mImageFileLocation = "";
private static final int STATE_PREVIEW = 0;
private static final int STATE_WAIT_LOCK = 1;
private static final int STATE_WAITING_PRECAPTURE = 2;
/**
* Camera state: Waiting for the exposure state to be something other than precapture.
*/
private static final int STATE_WAITING_NON_PRECAPTURE = 3;
/**
* Camera state: Picture was taken.
*/
private static final int STATE_PICTURE_TAKEN = 4;
private int mState;
private TextureView mTextureView;
private Size mPreviewSize;
private String mCameraId;
String[] PERMISSIONS = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.CAMERA};
private static final int PERMISSION_ALL = 105;
private static final int REQUEST_CAMERA_RESULT = 106;
private boolean isRegistred=false;
private int mSensorOrientation;
private TextureView.SurfaceTextureListener mSurfaceTextureListener =
new TextureView.SurfaceTextureListener() {
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
if (!TextUtils.isEmpty(BleUtils.getCameraLens(AndroidCamera.this)))
setupCamera(width, height,BleUtils.getCameraLens(AndroidCamera.this));
else
setupCamera(width, height,"1");
openCamera();
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
//closeCamera();
return false;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
};
private Semaphore mCameraOpenCloseLock = new Semaphore(1);
private CameraDevice mCameraDevice;
private CameraDevice.StateCallback mCameraDeviceStateCallback =
new CameraDevice.StateCallback() {
#Override
public void onOpened(CameraDevice camera) {
mCameraOpenCloseLock.release();
mCameraDevice = camera;
//Toast.makeText(getApplicationContext(),"Camera Opened!", Toast.LENGTH_SHORT).show();
createCameraPreviewSession();
}
#Override
public void onDisconnected(CameraDevice camera) {
camera.close();
mCameraDevice = null;
}
#Override
public void onError(CameraDevice camera, int error) {
camera.close();
mCameraDevice = null;
}
};
private CaptureRequest mPreviewCaptureRequest;
private CaptureRequest.Builder mPreviewCaptureRequestBuilder;
private CameraCaptureSession mCameraCaptureSession;
private CameraCaptureSession.CaptureCallback mSessionCaptureCallback
= new CameraCaptureSession.CaptureCallback() {
private void process(CaptureResult result){
switch (mState){
case STATE_PREVIEW:
break;
case STATE_WAIT_LOCK:
Integer afState=result.get(CaptureResult.CONTROL_AF_STATE);
if(afState==CaptureRequest.CONTROL_AF_STATE_FOCUSED_LOCKED){
captureStillImage();
}
else{
captureStillImage();
}
break;
}
}
#Override
public void onCaptureStarted(CameraCaptureSession session, CaptureRequest request, long timestamp, long frameNumber) {
super.onCaptureStarted(session, request, timestamp, frameNumber);
}
#Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {
super.onCaptureCompleted(session, request, result);
process(result);
}
#Override
public void onCaptureFailed(CameraCaptureSession session, CaptureRequest request, CaptureFailure failure) {
super.onCaptureFailed(session, request, failure);
Handler mHandler = new Handler(getMainLooper());
mHandler.post(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(), "Focus Lock UnSuccesful", Toast.LENGTH_SHORT).show();
}
});
}
};
private HandlerThread mBackgroundThread;
private Handler mBackgroundHandler;
private static File mImageFile;
private ImageReader mImageReader;
private final ImageReader.OnImageAvailableListener mOnImageAvailableListener =
new ImageReader.OnImageAvailableListener() {
#Override
public void onImageAvailable(ImageReader reader) {
mBackgroundHandler.post(new ImageSaver(reader.acquireNextImage()));
}
};
private static class ImageSaver implements Runnable {
private final Image mImage;
private ImageSaver(Image image) {
mImage = image;
}
#Override
public void run() {
ByteBuffer byteBuffer = mImage.getPlanes()[0].getBuffer();
byte[] bytes = new byte[byteBuffer.remaining()];
byteBuffer.get(bytes);
FileOutputStream fileOutputStream = null;
try {
fileOutputStream = new FileOutputStream(mImageFile);
fileOutputStream.write(bytes);
} catch (IOException e) {
e.printStackTrace();
} finally {
mImage.close();
if (fileOutputStream != null) {
try {
fileOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_activity);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
if(!hasAllPermissions(this, PERMISSIONS)){
ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);
}
}
mTextureView = (TextureView) findViewById(R.id.texture);
}
public static boolean hasAllPermissions(Context context, String... permissions) {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {
for (String permission : permissions) {
if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
}
return true;
}
#Override
public void onStart() {
super.onStart();
if (!EventBus.getDefault().isRegistered(this)) {
EventBus.getDefault().register(this);
}
}
//onStop
#Override
public void onStop() {
super.onStop();
EventBus.getDefault().unregister(this);
}
#Subscribe
public void onCaptureNumberReceived(OnCaptureEvent event) {
//get the phone number value here and do something with it
String capturecode = event.getCodeCapture();
Log.d(TAG, capturecode);
if (capturecode.equals("capture")) {
try {
mImageFile = createImageFile();
} catch (IOException e) {
e.printStackTrace();
}
lockFocus();
MediaActionSound sound = new MediaActionSound();
sound.play(MediaActionSound.SHUTTER_CLICK);
}
else if(capturecode.equals("end_capture")) {
finish(); // call this to finish the current activity
Intent homeIntent = new Intent(Intent.ACTION_MAIN);
homeIntent.addCategory( Intent.CATEGORY_HOME );
homeIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(homeIntent);
}
}
public void takepicture(View view) {
try {
mImageFile = createImageFile();
Log.d("TAG","=====Take picture=====");
} catch (IOException e) {
e.printStackTrace();
}
lockFocus();
MediaActionSound sound = new MediaActionSound();
sound.play(MediaActionSound.SHUTTER_CLICK);
}
public void switch_camera(View view) {
closeCamera();
//swap the id of the camera to be used
if(mCameraId == String.valueOf(Camera.CameraInfo.CAMERA_FACING_BACK)){
mCameraId = String.valueOf(Camera.CameraInfo.CAMERA_FACING_FRONT);
}
else {
mCameraId = String.valueOf(Camera.CameraInfo.CAMERA_FACING_BACK);
}
BleUtils.setCameraLens(this, mCameraId);
if (mTextureView.isAvailable()) {
setupCamera(mTextureView.getWidth(), mTextureView.getHeight(),mCameraId);
openCamera();
} else {
mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
}
}
File createImageFile() throws IOException {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "BLE_" + timeStamp + "_";
File storageDirectory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
if(!storageDirectory.exists()){
if(!storageDirectory.mkdirs()){
Log.e("Dir", "Failed to create directory");
Log.d("MAKE DIR", storageDirectory.mkdir() + "" + storageDirectory.getParentFile() + "");
return null;
}
}
File image = File.createTempFile(imageFileName, ".jpg", storageDirectory);
mImageFileLocation = image.getAbsolutePath();
return image;
}
#Override
public void onResume() {
super.onResume();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
if(!hasAllPermissions(this, PERMISSIONS)){
ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);
}
}
openBackgroundThread();
if (mTextureView.isAvailable()) {
if (!TextUtils.isEmpty(BleUtils.getCameraLens(AndroidCamera.this)))
setupCamera(mTextureView.getWidth(), mTextureView.getHeight(),BleUtils.getCameraLens(AndroidCamera.this));
else
setupCamera(mTextureView.getWidth(), mTextureView.getHeight(),"1");
closeCamera();
openCamera();
} else {
mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
}
}
#Override
public void onDestroy() {
super.onDestroy();
Log.d(TAG,"onDestroy");
}
public void onPause() {
Log.d(TAG,"onPause");
closeCamera();
closeBackgroundThread();
super.onPause();
}
private void setupCamera(int width, int height, String cameraId) {
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(cameraId);
StreamConfigurationMap map = cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
Size largestImageSize = Collections.max(
Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
new Comparator<Size>() {
#Override
public int compare(Size lhs, Size rhs) {
return Long.signum(lhs.getWidth() * lhs.getHeight() -
rhs.getWidth() * rhs.getHeight());
}
}
);
mImageReader = ImageReader.newInstance(largestImageSize.getWidth(),
largestImageSize.getHeight(),
ImageFormat.JPEG,
1);
mImageReader.setOnImageAvailableListener(mOnImageAvailableListener,
mBackgroundHandler);
mPreviewSize = getPreferredPreviewSize(map.getOutputSizes(SurfaceTexture.class), width, height);
mCameraId = cameraId;
Log.d("CAMERA_ID",String.valueOf(mCameraId));
// }
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private Size getPreferredPreviewSize(Size[] mapSizes, int width, int height) {
List<Size> collectorSizes = new ArrayList<>();
for (Size option : mapSizes) {
if (width > height) {
if (option.getWidth() > width &&
option.getHeight() > height) {
collectorSizes.add(option);
}
} else {
if (option.getWidth() > height &&
option.getHeight() > width) {
collectorSizes.add(option);
}
}
}
if (collectorSizes.size() > 0) {
return Collections.min(collectorSizes, new Comparator<Size>() {
#Override
public int compare(Size lhs, Size rhs) {
return Long.signum(lhs.getWidth() * lhs.getHeight() - rhs.getWidth() * rhs.getHeight());
}
});
}
return mapSizes[0];
}
private void openCamera() {
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
Log.v("CAMERA", mCameraId + " " + mCameraDeviceStateCallback);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
if(ContextCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA)
== PackageManager.PERMISSION_GRANTED){
cameraManager.openCamera(mCameraId, mCameraDeviceStateCallback,mBackgroundHandler);
}
else {
if (shouldShowRequestPermissionRationale(android.Manifest.permission.CAMERA)){
Toast.makeText(this,"No Permission to use the Camera services", Toast.LENGTH_SHORT).show();
}
requestPermissions(new String[] {android.Manifest.permission.CAMERA},REQUEST_CAMERA_RESULT);
}
}
else {
cameraManager.openCamera(mCameraId, mCameraDeviceStateCallback, mBackgroundHandler);
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode){
case REQUEST_CAMERA_RESULT:
if (grantResults[0] != PackageManager.PERMISSION_GRANTED){
Toast.makeText(this, "Cannot run application because camera service permission have not been granted", Toast.LENGTH_SHORT).show();
}
break;
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
break;
}
}
private void closeCamera(){
if(mCameraCaptureSession!=null){
mCameraCaptureSession.close();
mCameraCaptureSession=null;
}
if (mCameraDevice!=null){
mCameraDevice.close();
mCameraDevice=null;
if(mImageReader!=null){
mImageReader.close();
mImageReader=null;
}
}
}
private void createCameraPreviewSession(){
try{
SurfaceTexture surfaceTexture = mTextureView.getSurfaceTexture();
surfaceTexture.setDefaultBufferSize(mPreviewSize.getWidth(),mPreviewSize.getHeight());
Surface previewSurface= new Surface(surfaceTexture);
mPreviewCaptureRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
mPreviewCaptureRequestBuilder.addTarget(previewSurface);
mPreviewCaptureRequestBuilder.set(CaptureRequest.JPEG_QUALITY, (byte)100);
mCameraDevice.createCaptureSession(Arrays.asList(previewSurface,mImageReader.getSurface()),
new CameraCaptureSession.StateCallback() {
#Override
public void onConfigured(CameraCaptureSession session) {
if(mCameraDevice==null){
return;
}
try {
mPreviewCaptureRequest = mPreviewCaptureRequestBuilder.build();
mCameraCaptureSession = session;
mCameraCaptureSession.setRepeatingRequest(
mPreviewCaptureRequest,
mSessionCaptureCallback,
mBackgroundHandler
);
}catch (CameraAccessException e){
e.printStackTrace();
}
}
#Override
public void onConfigureFailed(CameraCaptureSession session) {
Handler mHandler = new Handler(getMainLooper());
mHandler.post(new Runnable() {
#Override
public void run() {
Toast.makeText(
getApplicationContext(),
"create camera session failed!",
Toast.LENGTH_SHORT
).show();
}
});
}
},null);
}catch (CameraAccessException e){
e.printStackTrace();
}
}
private void openBackgroundThread(){
mBackgroundThread=new HandlerThread("Camera2 background thread");
mBackgroundThread.start();
mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
}
private void closeBackgroundThread(){
mBackgroundThread.quitSafely();
try{
mBackgroundThread.join();
mBackgroundThread=null;
mBackgroundHandler=null;
}catch (InterruptedException e){
e.printStackTrace();
}
}
private void lockFocus(){
try{
mState=STATE_WAIT_LOCK;
mPreviewCaptureRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
CaptureRequest.CONTROL_AF_TRIGGER_START);
mCameraCaptureSession.capture(mPreviewCaptureRequestBuilder.build(),
mSessionCaptureCallback,mBackgroundHandler);
}catch (CameraAccessException e){
e.printStackTrace();
}
}
private void unLockFocus(){
try{
mState=STATE_PREVIEW;
mPreviewCaptureRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
CaptureRequest.CONTROL_AF_TRIGGER_CANCEL);
mCameraCaptureSession.capture(mPreviewCaptureRequestBuilder.build(),
mSessionCaptureCallback,mBackgroundHandler);
}catch (CameraAccessException e){
e.printStackTrace();
}
}
private void captureStillImage(){
try {
CaptureRequest.Builder captureStillBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
captureStillBuilder.addTarget(mImageReader.getSurface());
// Use the same AE and AF modes as the preview.
captureStillBuilder.set(CaptureRequest.CONTROL_AF_MODE,
CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
// setAutoFlash(captureBuilder);
// Orientation
int rotation=0;
//Front camera
if(mCameraId.equals("1")) {
rotation = this.getWindowManager().getDefaultDisplay().getRotation();
captureStillBuilder.set(CaptureRequest.JPEG_ORIENTATION, getOrientation(rotation));
}
else {
rotation = this.getWindowManager().getDefaultDisplay().getRotation();
captureStillBuilder.set(CaptureRequest.JPEG_ORIENTATION,
ORIENTATIONS.get(rotation));
}
CameraCaptureSession.CaptureCallback captureCallback =
new CameraCaptureSession.CaptureCallback() {
#Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {
super.onCaptureCompleted(session, request, result);
//Toast.makeText(getApplicationContext(),"Image Captured",Toast.LENGTH_SHORT).show();
unLockFocus();
}
};
mCameraCaptureSession.capture(
captureStillBuilder.build(),captureCallback,null
);
}catch (CameraAccessException e){
e.printStackTrace();
}
}
private int getOrientation(int rotation) {
return (ORIENTATIONS.get(rotation) + mSensorOrientation +180) % 360;
}
}

setupCamera() is called right from onSurfaceTextureAvailable, which can be earlier than the permissions are granted.
What you need to do is to track whether the permissions are granted and if the surface texture available in both callbacks.
Make a single entry for checking these conditions and setting up camera
private boolean mSurfaceTextureAvailable;
private boolean mPermissionsGranted;
private boolean mCameraOpened;
private void setupCameraIfPossible() {
if (!mCameraOpened && mSurfaceTextureAvailable && mPermissionsGranted) {
String cameraLens = BleUtils.getCameraLens(AndroidCamera.this);
if (TextUtils.isEmpty(cameraLens)) {
cameraLens = "1";
}
setupCamera(mTextureView.getWidth(), mTextureView.getHeight(), cameraLens);
openCamera();
}
}
private final TextureView.SurfaceTextureListener mSurfaceTextureListener =
new TextureView.SurfaceTextureListener() {
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
mSurfaceTextureAvailable = true;
setupCameraIfPossible();
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
//closeCamera();
mSurfaceTextureAvailable = false;
return false;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_activity);
openBackgroundThread();
// Make sure the boolean flag is set. Will be true for lower SDK
mPermissionsGranted = hasAllPermissions(this, PERMISSIONS);
if (!mPermissionsGranted) {
ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);
}
mTextureView = (TextureView) findViewById(R.id.texture);
}
In onResume() you don't need to check for permissions. If they will be denied while in background your Activity will get killed and you will go through onCreate() again.
Remove the code in onPause() and onResume()!
// #Override
// public void onResume() {
// super.onResume();
// if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
// if(!hasAllPermissions(this, PERMISSIONS)){
// ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);
// }
// }
// openBackgroundThread();
// if (mTextureView.isAvailable()) {
// if (!TextUtils.isEmpty(BleUtils.getCameraLens(AndroidCamera.this)))
// setupCamera(mTextureView.getWidth(), mTextureView.getHeight(),BleUtils.getCameraLens(AndroidCamera.this));
// else
// setupCamera(mTextureView.getWidth(), mTextureView.getHeight(),"1");
// closeCamera();
// openCamera();
// } else {
// mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
// }
// }
// public void onPause() {
// Log.d(TAG,"onPause");
// closeCamera();
//
// closeBackgroundThread();
// super.onPause();
// }
Add this to onStart()
#Override
public void onStart() {
super.onStart();
openCameraIfPossible();
}
Move closing camera to onStop()
#Override
public void onStop() {
super.onStop();
closeCamera();
}
private void closeCamera() {
mCameraOpened = false; // set a field indicating it is closed
...
}
private void openCamera() {
...
mCameraOpened = true; // If successful, set a field indicating it is opened
}
Now another thing I discovered is that you must actually check for permissions in onRequestPermissionsResult() instead of using grantResults flags
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case REQUEST_CAMERA_RESULT:
mPermissionsGranted = hasAllPermissions(this, PERMISSIONS);
setupCameraIfPossible();
break;
default:
break;
}
}

How to show the camera preview on a SurfaceView?

I am trying to open the camera hardware on a SurfaceView. In the layout, I created a SurfaceView and I open the camera as shown in the code below. When I run the code, the toast in the CameraAvailableCB shows up and says "onCameraAvailable" but nothing appears on the SurfaceView.
How do I show the camera display on the SurfaceView?
Code
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.mBtnCapture = (Button) findViewById(R.id.actMain_btn_capture);
this.mSurfaceView = (SurfaceView) findViewById(R.id.actMain_surfaceView);
this.mSurfaceHolder = this.mSurfaceView.getHolder();
this.mSurfaceHolder.addCallback(this);
this.mCameraManager = (CameraManager) this.getSystemService(Context.CAMERA_SERVICE);
try {
cameraIDsList = this.mCameraManager.getCameraIdList();
for (String id : cameraIDsList) {
Log.v(TAG, "CameraID: " + id);
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
cameraStateCB = new CameraDevice.StateCallback() {
#Override
public void onOpened(CameraDevice camera) {
Toast.makeText(getApplicationContext(), "onOpened", Toast.LENGTH_SHORT).show();
//requesting permission
int permissionCheck = ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.CAMERA)) {
} else {
ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.CAMERA}, MY_PERMISSIONS_REQUEST_CAMERA);
Toast.makeText(getApplicationContext(), "request permission", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(), "PERMISSION_ALREADY_GRANTED", Toast.LENGTH_SHORT).show();
}
//opening the camera
try {
mCameraManager.openCamera(cameraIDsList[1], cameraStateCB, new Handler());
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
#Override
public void onDisconnected(CameraDevice camera) {
Toast.makeText(getApplicationContext(), "onDisconnected", Toast.LENGTH_SHORT).show();
}
#Override
public void onError(CameraDevice camera, int error) {
Toast.makeText(getApplicationContext(), "onError", Toast.LENGTH_SHORT).show();
}
};
CameraManager.AvailabilityCallback cameraAvailableCB = new CameraManager.AvailabilityCallback() {
#Override
public void onCameraAvailable(String cameraId) {
super.onCameraAvailable(cameraId);
Toast.makeText(getApplicationContext(), "onCameraAvailable", Toast.LENGTH_SHORT).show();
}
#Override
public void onCameraUnavailable(String cameraId) {
super.onCameraUnavailable(cameraId);
Toast.makeText(getApplicationContext(), "onCameraUnavailable", Toast.LENGTH_SHORT).show();
}
};
this.mCameraManager.registerAvailabilityCallback(cameraAvailableCB, new Handler());
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_CAMERA:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
// Open Camera
break;
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
Log.w(TAG, "surfaceCreated");
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Log.w(TAG, "surfaceChanged");
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.w(TAG, "surfaceDestroyed");
}

To show preview from camera using Camera2 API you should do the following steps:
Get permission to use camera device
Using CameraManager open connection to a camera
Have prepared Surface for preview
Using opened camera device and desired surfaces (it can include not only preview surface) create CaptureSession
After CaptureSession created you need to create and configure CaptureRequest and submit it to CaptureSession
Need to notice that preparing surfaces and openning connection to camera are independent processes, so you need to be sure, that they are both completed before creating CaptureSession.
Here is the example of activity to display camera preview on the screen:
public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback, Handler.Callback {
static final String TAG = "CamTest";
static final int MY_PERMISSIONS_REQUEST_CAMERA = 1242;
private static final int MSG_CAMERA_OPENED = 1;
private static final int MSG_SURFACE_READY = 2;
private final Handler mHandler = new Handler(this);
SurfaceView mSurfaceView;
SurfaceHolder mSurfaceHolder;
CameraManager mCameraManager;
String[] mCameraIDsList;
CameraDevice.StateCallback mCameraStateCB;
CameraDevice mCameraDevice;
CameraCaptureSession mCaptureSession;
boolean mSurfaceCreated = true;
boolean mIsCameraConfigured = false;
private Surface mCameraSurface = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.mSurfaceView = (SurfaceView) findViewById(R.id.SurfaceViewPreview);
this.mSurfaceHolder = this.mSurfaceView.getHolder();
this.mSurfaceHolder.addCallback(this);
this.mCameraManager = (CameraManager) this.getSystemService(Context.CAMERA_SERVICE);
try {
mCameraIDsList = this.mCameraManager.getCameraIdList();
for (String id : mCameraIDsList) {
Log.v(TAG, "CameraID: " + id);
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
mCameraStateCB = new CameraDevice.StateCallback() {
#Override
public void onOpened(CameraDevice camera) {
Toast.makeText(getApplicationContext(), "onOpened", Toast.LENGTH_SHORT).show();
mCameraDevice = camera;
mHandler.sendEmptyMessage(MSG_CAMERA_OPENED);
}
#Override
public void onDisconnected(CameraDevice camera) {
Toast.makeText(getApplicationContext(), "onDisconnected", Toast.LENGTH_SHORT).show();
}
#Override
public void onError(CameraDevice camera, int error) {
Toast.makeText(getApplicationContext(), "onError", Toast.LENGTH_SHORT).show();
}
};
}
#Override
protected void onStart() {
super.onStart();
//requesting permission
int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
} else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, MY_PERMISSIONS_REQUEST_CAMERA);
Toast.makeText(getApplicationContext(), "request permission", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(), "PERMISSION_ALREADY_GRANTED", Toast.LENGTH_SHORT).show();
try {
mCameraManager.openCamera(mCameraIDsList[1], mCameraStateCB, new Handler());
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
}
#Override
protected void onStop() {
super.onStop();
try {
if (mCaptureSession != null) {
mCaptureSession.stopRepeating();
mCaptureSession.close();
mCaptureSession = null;
}
mIsCameraConfigured = false;
} catch (final CameraAccessException e) {
// Doesn't matter, cloising device anyway
e.printStackTrace();
} catch (final IllegalStateException e2) {
// Doesn't matter, cloising device anyway
e2.printStackTrace();
} finally {
if (mCameraDevice != null) {
mCameraDevice.close();
mCameraDevice = null;
mCaptureSession = null;
}
}
}
#Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case MSG_CAMERA_OPENED:
case MSG_SURFACE_READY:
// if both surface is created and camera device is opened
// - ready to set up preview and other things
if (mSurfaceCreated && (mCameraDevice != null)
&& !mIsCameraConfigured) {
configureCamera();
}
break;
}
return true;
}
private void configureCamera() {
// prepare list of surfaces to be used in capture requests
List<Surface> sfl = new ArrayList<Surface>();
sfl.add(mCameraSurface); // surface for viewfinder preview
// configure camera with all the surfaces to be ever used
try {
mCameraDevice.createCaptureSession(sfl,
new CaptureSessionListener(), null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
mIsCameraConfigured = true;
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_CAMERA:
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED)
try {
mCameraManager.openCamera(mCameraIDsList[1], mCameraStateCB, new Handler());
} catch (CameraAccessException e) {
e.printStackTrace();
}
break;
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
mCameraSurface = holder.getSurface();
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
mCameraSurface = holder.getSurface();
mSurfaceCreated = true;
mHandler.sendEmptyMessage(MSG_SURFACE_READY);
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
mSurfaceCreated = false;
}
private class CaptureSessionListener extends
CameraCaptureSession.StateCallback {
#Override
public void onConfigureFailed(final CameraCaptureSession session) {
Log.d(TAG, "CaptureSessionConfigure failed");
}
#Override
public void onConfigured(final CameraCaptureSession session) {
Log.d(TAG, "CaptureSessionConfigure onConfigured");
mCaptureSession = session;
try {
CaptureRequest.Builder previewRequestBuilder = mCameraDevice
.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
previewRequestBuilder.addTarget(mCameraSurface);
mCaptureSession.setRepeatingRequest(previewRequestBuilder.build(),
null, null);
} catch (CameraAccessException e) {
Log.d(TAG, "setting up preview failed");
e.printStackTrace();
}
}
}
}

With CameraX it's easy now.
// Create a preview use case instance
val preview = Preview.Builder().build()
// Bind the preview use case and other needed user cases to a lifecycle
val camera = cameraProvider.bindToLifecycle(lifecycleOwner, cameraSelector, preview, imageAnalysis, imageCapture)
// Create a surfaceProvider using the bound camera's cameraInfo
val surfaceProvider = previewView.createSurfaceProvider(camera.cameraInfo)
// Attach the surfaceProvider to the preview use case to start preview
preview.setSurfaceProvider(surfaceProvider)
<androidx.camera.view.PreviewView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:scaleType="fitEnd" />
https://medium.com/androiddevelopers/display-a-camera-preview-with-previewview-86562433d86c