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POwhy does camera's live preview rotates 90 degrees?
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copied!<p>I've written a camera application, but when I want to show the camera's live preview(before taking the picture), the preview is rotated 90 degrees! here is my camera activity's code :</p> <pre><code>public class CameraActivity extends Activity{ public static final int MEDIA_TYPE_IMAGE = 1 ; private Camera mCamera; private CameraPreview mPreview; Uri photoPath ; protected void onStop() { super.onStop(); mCamera.release(); } public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_camera); // Create an instance of Camera mCamera = getCameraInstance(); // Create our Preview view and set it as the content of our activity. mPreview = new CameraPreview(this, mCamera); FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview); ViewGroup.LayoutParams previewParam = preview.getLayoutParams() ; Parameters cameraParam = mCamera.getParameters() ; double ratio = (double)cameraParam.getPictureSize().height / (double)cameraParam.getPictureSize().width ; // previewParam.height= cameraParam.getPictureSize().height / 5 ; // previewParam.width = cameraParam.getPictureSize().width / 5 ; Display display = getWindowManager().getDefaultDisplay(); Point size = new Point(); try { display.getSize(size); } catch(java.lang.NoSuchMethodError ignore) { size.x = display.getWidth(); size.y = display.getHeight() ; } int width = size.x; int height = size.y; previewParam.width = width; previewParam.height = (int)(previewParam.width * ratio) ; // preview.setLayoutParams(previewParam) ; preview.addView(mPreview); } //Camera Classes here private final static String TAG = "Navid"; public static Camera getCameraInstance() { Camera c = null ; try { c = Camera.open() ; } catch(Exception e) { } return c ; } public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback { private SurfaceHolder mHolder ; private Camera mCamera; public CameraPreview(Context context , Camera camera) { super(context) ; mCamera = camera ; mHolder = getHolder(); mHolder.addCallback(this); mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } public void surfaceCreated(SurfaceHolder holder) { try { mCamera.setPreviewDisplay(holder); mCamera.startPreview(); } catch(IOException e) { Log.d(TAG,"Camera Preview Failed!: "+e.getMessage()); } } public void surfaceChanged(SurfaceHolder holder , int m , int n , int w) { } public void surfaceDestroyed(SurfaceHolder holder) { } } private static File getOutputMediaFile(int type){ // To be safe, you should check that the SDCard is mounted // using Environment.getExternalStorageState() before doing this. File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory( Environment.DIRECTORY_PICTURES), "MyCameraApp"); // This location works best if you want the created images to be shared // between applications and persist after your app has been uninstalled. // Create the storage directory if it does not exist if (! mediaStorageDir.exists()){ if (! mediaStorageDir.mkdirs()){ Log.d("MyCameraApp", "failed to create directory"); return null; } } // Create a media file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); File mediaFile; if (type == MEDIA_TYPE_IMAGE){ mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_"+ timeStamp + ".jpg"); }else { return null; } return mediaFile; } //save the picture here private PictureCallback mPicture = new PictureCallback() { // public final static int MEDIA_TYPE_IMAGE = 1 ; @Override public void onPictureTaken(byte[] data, Camera camera) { File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE); photoPath = Uri.fromFile(pictureFile); if (pictureFile == null){ Log.d("Errore Doorbin", "Error creating media file, check storage permissions: "); return; } try { FileOutputStream fos = new FileOutputStream(pictureFile); fos.write(data); fos.close(); // these lines are for the gallery to scan the SDCard manually File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory( Environment.DIRECTORY_PICTURES), "MyCameraApp"); sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+ mediaStorageDir))); // photoPath = Uri.fromFile(mediaStorageDir) ; /* MediaScannerConnection.scanFile(CameraActivity.this, new String[] { fos.toString() }, null, new MediaScannerConnection.OnScanCompletedListener() { public void onScanCompleted(String path, Uri uri) { // code to execute when scanning is complete } });*/ // fos.close(); } catch (FileNotFoundException e) { Log.d("Errore Doorbin", "File not found: " + e.getMessage()); } catch (IOException e) { Log.d("Errore Doorbin", "Error accessing file: " + e.getMessage()); } catch (Exception e) { Log.d("Errore Doorbin", "errore Kolli dade!" + e.getMessage()) ; } } }; public void capture(View v) { //mCamera.takePicture(null, null, mPicture); //mCamera.release(); //mCamera = getCameraInstance() ; //mCamera.startPreview(); TakePictureTask takePicture = new TakePictureTask() ; takePicture.execute() ; } public void accept(View v) { Intent data = new Intent() ; data.setData(photoPath) ; setResult(RESULT_OK, data); finish() ; } public void retake(View v) { Button button = (Button)findViewById(R.id.button_accept); button.setVisibility(View.GONE); button = (Button)findViewById(R.id.button_capture) ; button.setVisibility(View.VISIBLE) ; button = (Button)findViewById(R.id.button_retake); button.setVisibility(View.GONE) ; mCamera.startPreview(); } /** * A pretty basic example of an AsyncTask that takes the photo and * then sleeps for a defined period of time before finishing. Upon * finishing, it will restart the preview - Camera.startPreview(). */ private class TakePictureTask extends AsyncTask<Void, Void, Void> { @Override protected void onPostExecute(Void result) { // This returns the preview back to the live camera feed Button button = (Button)findViewById(R.id.button_accept) ; button.setVisibility(View.VISIBLE) ; button = (Button)findViewById(R.id.button_retake) ; button.setVisibility(View.VISIBLE); button = (Button)findViewById(R.id.button_capture); button.setVisibility(View.GONE); //mCamera.startPreview(); } @Override protected Void doInBackground(Void... params) { mCamera.takePicture(null, null, mPicture); // Sleep for however long, you could store this in a variable and // have it updated by a menu item which the user selects. try { Thread.sleep(3000); // 3 second preview } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } } } </code></pre> <p>and in my application's manifest I've changed this activities orientation to portrait!</p> <p>What is the problem ? why does it look like this ? </p>

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