Switch To Front Camera and Back Camera Android SurfaceView
15,651
Solution 1
Try below code
mCamera= Camera.open(cameraId);
0 for CAMERA_FACING_BACK
1 for CAMERA_FACING_FRONT
Reference Camera.open(int)
Solution 2
Here is my final code for camera switching back/front, It's Working for me ..
public class MyCamera extends Activity implements SurfaceHolder.Callback, Camera.ShutterCallback, Camera.PictureCallback {
Camera mCamera;
SurfaceView mPreview;
String filePath ;
int currentCameraId = 0;
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.camera_preview);
mPreview = (SurfaceView)findViewById(R.id.preview);
mPreview.getHolder().addCallback(this);
mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mCamera = Camera.open(currentCameraId);
}
@Override
public void onPause() {
super.onPause();
mCamera.stopPreview();
}
@Override
public void onDestroy() {
super.onDestroy();
mCamera.release();
Log.d("CAMERA","Destroy");
}
public void onCancelClick(View v) {
mCamera.stopPreview();
mCamera.release();
if(currentCameraId == Camera.CameraInfo.CAMERA_FACING_BACK){
currentCameraId = Camera.CameraInfo.CAMERA_FACING_FRONT;
}
else {
currentCameraId = Camera.CameraInfo.CAMERA_FACING_BACK;
}
mCamera = Camera.open(currentCameraId);
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_FRONT, info);
int rotation = this.getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0: degrees = 0; break; //Natural orientation
case Surface.ROTATION_90: degrees = 90; break; //Landscape left
case Surface.ROTATION_180: degrees = 180; break;//Upside down
case Surface.ROTATION_270: degrees = 270; break;//Landscape right
}
int rotate = (info.orientation - degrees + 360) % 360;
//STEP #2: Set the 'rotation' parameter
Camera.Parameters params = mCamera.getParameters();
params.setRotation(rotate);
try {
mCamera.setPreviewDisplay(mPreview.getHolder());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.setParameters(params);
mCamera.setDisplayOrientation(90);
mCamera.startPreview();
}
public void onSnapClick(View v) {
mCamera.takePicture(this, null, null, this);
}
@Override
public void onShutter() {
Toast.makeText(this, "Click!", Toast.LENGTH_SHORT).show();
}
@Override
public void onPictureTaken(byte[] data, Camera camera) {
//Here, we chose internal storage
FileOutputStream fos = null;
try {
filePath = "/sdcard/test.jpg";
fos = new FileOutputStream(
filePath);
fos.write(data);
fos.close();
//Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (IOException e) {
e.printStackTrace();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} finally {
Intent i = getIntent();
i.putExtra("Path",filePath);
setResult(RESULT_OK, i);
finish();
}
camera.startPreview();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
int rotation = this.getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0: degrees = 0; break; //Natural orientation
case Surface.ROTATION_90: degrees = 90; break; //Landscape left
case Surface.ROTATION_180: degrees = 180; break;//Upside down
case Surface.ROTATION_270: degrees = 270; break;//Landscape right
}
int rotate = (info.orientation - degrees + 360) % 360;
//STEP #2: Set the 'rotation' parameter
Camera.Parameters params = mCamera.getParameters();
params.setRotation(rotate);
mCamera.setParameters(params);
mCamera.setDisplayOrientation(90);
mCamera.startPreview();
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(mPreview.getHolder());
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("PREVIEW","surfaceDestroyed");
}
}
Author by
Ateeq Ur Rehman
Updated on June 25, 2022Comments
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Ateeq Ur Rehman almost 2 years
I want to use the switch camera function. Currently I have Developed a Camera Object That working fine for back-camera but not working for front-camera. And I am unable to find a solution for switching between front and back cameras. Here is My Code..!
public class MyCamera extends Activity implements SurfaceHolder.Callback, Camera.ShutterCallback, Camera.PictureCallback { Camera mCamera; SurfaceView mPreview; String filePath; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.camera_preview); mPreview = (SurfaceView) findViewById(R.id.preview); mPreview.getHolder().addCallback(this); mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); mCamera = Camera.open(); } @Override public void onPause() { super.onPause(); mCamera.stopPreview(); } @Override public void onDestroy() { super.onDestroy(); mCamera.release(); Log.d("CAMERA", "Destroy"); } public void onCancelClick(View v) { finish(); } public void onSnapClick(View v) { mCamera.takePicture(this, null, null, this); } @Override public void onShutter() { Toast.makeText(this, "Click!", Toast.LENGTH_SHORT).show(); } @Override public void onPictureTaken(byte[] data, Camera camera) { FileOutputStream fos = null; try { filePath = "/sdcard/test.jpg"; fos = new FileOutputStream(filePath); fos.write(data); fos.close(); // Log.d("Log", "onPictureTaken - wrote bytes: " + data.length); } catch (FileNotFoundException e) { e.printStackTrace(); Log.d("Log", "onPictureTaken - wrote bytes: " + data.length); } catch (IOException e) { e.printStackTrace(); Log.d("Log", "onPictureTaken - wrote bytes: " + data.length); } finally { Intent i = getIntent(); i.putExtra("Path", filePath); setResult(RESULT_OK, i); finish(); } camera.startPreview(); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { Camera.CameraInfo info = new Camera.CameraInfo(); Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_FRONT, info); int rotation = this.getWindowManager().getDefaultDisplay() .getRotation(); int degrees = 0; switch (rotation) { case Surface.ROTATION_0: degrees = 0; break; // Natural orientation case Surface.ROTATION_90: degrees = 90; break; // Landscape left case Surface.ROTATION_180: degrees = 180; break;// Upside down case Surface.ROTATION_270: degrees = 270; break;// Landscape right } int rotate = (info.orientation - degrees + 360) % 360; Camera.Parameters params = mCamera.getParameters(); params.setRotation(rotate); mCamera.setParameters(params); mCamera.setDisplayOrientation(90); mCamera.startPreview(); } @Override public void surfaceCreated(SurfaceHolder holder) { try { mCamera.setPreviewDisplay(mPreview.getHolder()); } catch (Exception e) { e.printStackTrace(); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { Log.i("PREVIEW", "surfaceDestroyed"); } }
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Vaibs_Cool almost 9 yearswhere is button to switch it
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Alex Cohn almost 7 yearsSorry, this code is wrong. The integer index used for Camera.open() is not one of the constants in Camera.CameraInfo class.
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Dhruv Kaushal almost 7 yearsDo add camera.release(); before you change the id