Hi can any one help me with camera.
Am trying to create custom camera with three buttons capture, switch camera , and flash .
when i capture image the image should display in Display.class and save to phone.
but when i use back camera blank page is diaplaying and when i use front camera image is displaying in display activity. Please check my code and tell me what is the problem. Logcat is not showing any error.
Custom_camera_activity.java
CameraPreview.java
Display.java
Please check this code and help me to trace the issue.
Am trying to create custom camera with three buttons capture, switch camera , and flash .
when i capture image the image should display in Display.class and save to phone.
but when i use back camera blank page is diaplaying and when i use front camera image is displaying in display activity. Please check my code and tell me what is the problem. Logcat is not showing any error.
Custom_camera_activity.java
Code:
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.activity_custom__camera );
//Flash
hasFlash = getApplicationContext().getPackageManager()
.hasSystemFeature( PackageManager.FEATURE_CAMERA_FLASH);
if (!hasFlash) {
// device doesn't support flash
// Show alert message and close the application
AlertDialog alert = new AlertDialog.Builder(Custom_CameraActivity.this)
.create();
alert.setTitle("Error");
alert.setMessage("Sorry, your device doesn't support flash light!");
alert.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// closing the application
finish();
}
});
alert.show();
return;
}
getWindow().addFlags( WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON );
context = this;
mCamera = Camera.open();
mCamera.setDisplayOrientation( 90 );
camerapreview = (LinearLayout) findViewById( R.id.camera_preview );
mCameraPreview = new CameraPreview( context, mCamera );
camerapreview.addView( mCameraPreview );
capture = (ImageButton) findViewById( R.id.button_capture );
capture.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
mCamera.takePicture( null, null, mPicture );
}
} );
switchCamera = (ImageButton) findViewById(R.id.btnSwitch);
switchCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//get the number of cameras
int camerasNumber = Camera.getNumberOfCameras();
if (camerasNumber > 1) {
//release the old camera instance
//switch camera, from the front and the back and vice versa
releaseCamera();
chooseCamera();
} else {
}
}
});
flash= (ImageButton)findViewById( R.id.bulb ) ;
flash.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
if(isFlashOn){
turnOffFlash();
}else{
turnOnFlash();
}
}
} );
mCamera.startPreview();
//initializeCamera();
}
private void turnOnFlash() {
if (isFlashOn) {
if (mCamera != null || params != null) {
return;
}
params = mCamera.getParameters();
params.setFlashMode( Camera.Parameters.FLASH_MODE_OFF);
mCamera.setParameters(params);
mCamera.stopPreview();
isFlashOn = false;
}
}
private void turnOffFlash() {
if(!isFlashOn) {
if (mCamera == null || params == null) {
return;
}
params = mCamera.getParameters();
((Camera.Parameters) params).setFlashMode( Camera.Parameters.FLASH_MODE_TORCH);
mCamera.setParameters(params);
mCamera.startPreview();
isFlashOn = true;
}
}
private void initializeCamera() {
int cameraId= findBackFacingCamera();
if(cameraId >= 0){
mCamera= Camera.open(cameraId);
mCamera.setDisplayOrientation( 180 );
mPicture=getPictureCallBack();
mCameraPreview.refreshCamera( mCamera );
}
}
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) {
cameraId = i;
cameraBack = false;
break;
}
}
return cameraId;
}
private int findBackFacingCamera() {
int cameraId = -1;
//Search for the back facing camera
//get the number of cameras
int numberOfCameras = Camera.getNumberOfCameras();
//for every camera check
for (int i = 0; i < numberOfCameras; i++) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
cameraId = i;
cameraBack = true;
break;
}
}
return cameraId;
}
@Override
protected void onResume() {
super.onResume();
if(mCamera== null){
mCamera = Camera.open();
mCamera.setDisplayOrientation( 90 );
mPicture= getPictureCallBack();
mCameraPreview.refreshCamera(mCamera);
Log.d("nu","null");
}else{
Log.d("nu","no null");
}
}
public void chooseCamera() {
//if the camera preview is the front
if (cameraBack) {
int cameraId = findFrontFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mCamera.setDisplayOrientation(90);
mPicture = getPictureCallBack();
mCameraPreview.refreshCamera(mCamera);
}
} else {
int cameraId = findBackFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mCamera.setDisplayOrientation(90);
mPicture = getPictureCallBack();
mCameraPreview.refreshCamera(mCamera);
}
}
}
@Override
protected void onPause() {
super.onPause();
releaseCamera();
}
private void releaseCamera() {
if(mCamera != null){
mCamera.stopPreview();
mCamera.setPreviewCallback( null );
mCamera.release();
mCamera= null;
}
}
private Camera.PictureCallback getPictureCallBack() {
Camera.PictureCallback picture = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
bitmap = BitmapFactory.decodeByteArray( data,0,data.length );
Intent intent= new Intent(Custom_CameraActivity.this,Display.class);
startActivity( intent );
}
};
return picture;
}
}
Code:
public class CameraPreview extends SurfaceView implements
SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mCamera;
// Constructor that obtains context and camera
@SuppressWarnings("deprecation")
public CameraPreview(Context context, Camera camera) {
super(context);
this.mCamera = camera;
this.mHolder = this.getHolder();
this.mHolder.addCallback(this);
this.mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
// create the surface and start camera preview
if (mCamera == null) {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
}
} catch (IOException e) {
Log.d(VIEW_LOG_TAG, "Error setting camera preview: " + e.getMessage());
}
}
public void refreshCamera(Camera camera){
if(mHolder.getSurface()== null){
return;
}
try{
mCamera.stopPreview();
}catch (Exception e){
}
setCamera(camera);
try{
mCamera.setPreviewDisplay( mHolder );
mCamera.startPreview();
}catch (Exception e){
Log.d(VIEW_LOG_TAG,"Error Starting camera preview: " +e.getMessage());
}
}
private void setCamera(Camera camera) {
mCamera = camera;
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
}
@Override
public void surfaceChanged(SurfaceHolder Holder, int format,
int width, int height) {
// start preview with new settings
refreshCamera( mCamera );
}
}Display.java
Code:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.activity_display );
image = findViewById( R.id.imageView );
scancode=findViewById( R.id.scan );
scancode.setOnClickListener( this );
image.setImageBitmap( Custom_CameraActivity.bitmap);
saveImage(Custom_CameraActivity.bitmap);
private String saveImage(Bitmap mybitmap) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream( );
mybitmap.compress( Bitmap.CompressFormat.JPEG,90,bytes );
File file= new File( Environment.getExternalStorageDirectory() + IMAGE_DIRECTORY );
if(!file.exists() ){
Log.d("dirrrrrr","" + file.mkdirs());
file.mkdirs();
}
try{
File f = new File( file, Calendar.getInstance().getTimeInMillis() + ".jpg");
f.createNewFile();
FileOutputStream fo = new FileOutputStream( f );
fo.write( bytes.toByteArray() );
MediaScannerConnection.scanFile( this,new String[]{f.getPath()} ,
new String[]{"image/jpeg"},null);
fo.close();
Log.d( "TAG","File Saved:: ---- " + f.getAbsolutePath() );
return f.getAbsolutePath();
}catch(IOException e1){
e1.printStackTrace();
}
return "";
}Please check this code and help me to trace the issue.