如何在每个设备/ Android版本上使相机照片正确？

Question

我写了这个相机应用程序，但我无法在每台设备上获得正确的图像

我发现不同设备上有两种类型的相机，所以我无法在每台设备上正确旋转照片。

我已经查看了一些开源相机应用，但没有看到任何处理此问题的逻辑，这些应用仍然可以正确旋转。

如何检测相机的类型？这样我就可以将照片旋转到正确的程度。

public class Camera01 extends Activity implements SurfaceHolder.Callback {
    SurfaceHolder surfaceHolder;
    SurfaceView surfaceView1;
    Button button1;
    Camera camera;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.camera01);
        button1=(Button)findViewById(R.id.button1);
        surfaceView1=(SurfaceView)findViewById(R.id.surfaceView1);
        surfaceHolder=surfaceView1.getHolder();
        surfaceHolder.addCallback(this);
        button1.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v) {
                camera.autoFocus(afcb);
            }
        });
    }
    PictureCallback jpeg =new PictureCallback(){
        public void onPictureTaken(byte[] data, Camera camera) {
            new SaveImageTask().execute(data);
            camera.startPreview();
        }
    };
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {}
    public void surfaceCreated(SurfaceHolder holder) {
        camera=Camera.open(1);
        try {
            Camera.Parameters params = camera.getParameters();
            List<Camera.Size> sizes = params.getSupportedPictureSizes();
            params.setPictureFormat(PixelFormat.JPEG);
            Camera.Size mSize = sizes.get(0);
            params.setPictureSize(mSize.width, mSize.height);
            params.setRotation(90);  //  <<<<<<<<<<<<<<<<<<<<< to correct photo direction
            camera.setParameters(params);
            camera.setPreviewDisplay(surfaceHolder);
//            camera.setDisplayOrientation(90);
            camera.startPreview();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public void surfaceDestroyed(SurfaceHolder holder) {
        camera.stopPreview();
        camera.release();
    }
    AutoFocusCallback afcb= new AutoFocusCallback(){
        public void onAutoFocus(boolean success, Camera camera) {
            if(success){
                camera.takePicture(null, null, jpeg);
            }
        }
    };

    private class SaveImageTask extends AsyncTask<byte[], Void, Void> {
        @Override
        protected Void doInBackground(byte[]... data) {
            FileOutputStream outStream = null;
            try {

                File dir = new File(Environment.getExternalStoragePublicDirectory(
                        Environment.DIRECTORY_DCIM), "test");
                if (! dir.exists()){
                    if (! dir.mkdirs()){
                        Log.d("MyCameraApp", "failed to create directory");
                        return null;
                    }
                }

                String fileName = String.format("%d.jpg", System.currentTimeMillis());
                File outFile = new File(dir, fileName);

                outStream = new FileOutputStream(outFile);
                outStream.write(data[0]);
                outStream.flush();
                outStream.close();
                Intent mediaScanIntent = new Intent( Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                mediaScanIntent.setData(Uri.fromFile(outFile));
                sendBroadcast(mediaScanIntent);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
            }
            return null;
        }

    }
}

Answer 1

如果filepath of image scaled bitmap image public Bitmap checkRotation(String filePath, Bitmap scaledBitmap) { ExifInterface exif; try { exif = new ExifInterface(filePath); int orientation = exif.getAttributeInt( ExifInterface.TAG_ORIENTATION, 0); Log.d("EXIF", "Exif: " + orientation); Matrix matrix = new Matrix(); if (orientation == 6) { matrix.postRotate(90); Log.d("EXIF", "Exif: " + orientation); } else if (orientation == 3) { matrix.postRotate(180); Log.d("EXIF", "Exif: " + orientation); } else if (orientation == 8) { matrix.postRotate(270); Log.d("EXIF", "Exif: " + orientation); } scaledBitmap = Bitmap.createBitmap(scaledBitmap, 0, 0, scaledBitmap.getWidth(), scaledBitmap.getHeight(), matrix, true); } catch (IOException e) { e.printStackTrace(); } return scaledBitmap; } ，则可以使用以下方法进行正确的轮换：

{{1}}