自定义相机图像在保存时旋转

时间:2014-12-21 09:35:05

标签: android android-camera custom-component

我正在尝试为我的应用程序构建一个自定义相机,我已经完成了,但问题是当我存储捕获的图像时,它会向左旋转90度。 以下是我的代码,请告诉我哪里出错了?

CamTestActivity类

public class CamTestActivity extends Activity {
private static final String TAG = "CamTestActivity";
public static final int REQUEST_CODE_GALLERY = 0x1;
private File mFileTemp;
Preview preview;
Button buttonClick, buttonGallery;
Camera camera;
Activity act;
Context ctx;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ctx = this;
    act = this;
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

    setContentView(R.layout.activity_main);

    /**
     * Get internal storage directory path for image save
     */
    String state = Environment.getExternalStorageState();
    if (Environment.MEDIA_MOUNTED.equals(state)) {// if
        mFileTemp = new File(Environment.getExternalStorageDirectory(), "temp_photo.png");
    } else {
        mFileTemp = new File(this.getFilesDir(), "temp_photo.png");
    }// End of if

    preview = new Preview(this, (SurfaceView) findViewById(R.id.surfaceView));
    preview.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
    ((FrameLayout) findViewById(R.id.layout)).addView(preview);
    preview.setKeepScreenOn(true);

    // preview.setOnClickListener(new OnClickListener() {
    //
    // @Override
    // public void onClick(View arg0) {
    // camera.takePicture(shutterCallback, rawCallback, jpegCallback);
    // }
    // });

    // Toast.makeText(ctx, getString(R.string.take_photo_help), Toast.LENGTH_LONG).show();

    buttonClick = (Button) findViewById(R.id.btnCapture);
    buttonGallery = (Button) findViewById(R.id.btnGallery);

    buttonClick.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            // preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback);
            camera.takePicture(shutterCallback, rawCallback, jpegCallback);
            Toast.makeText(ctx, ""+mFileTemp, Toast.LENGTH_LONG).show();
        }
    });

    buttonClick.setOnLongClickListener(new OnLongClickListener() {
        @Override
        public boolean onLongClick(View arg0) {
            camera.autoFocus(new AutoFocusCallback() {
                @Override
                public void onAutoFocus(boolean arg0, Camera arg1) {
                    camera.takePicture(shutterCallback, rawCallback, jpegCallback);
                    Toast.makeText(ctx, ""+mFileTemp, Toast.LENGTH_LONG).show();
                }
            });
            return true;
        }
    });

    buttonGallery.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            /**
             * To select an image from existing files, use Intent.createChooser to open image chooser. Android will automatically display a list of supported applications, such as image gallery or file manager.
             */
            Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
            photoPickerIntent.setType("image/*");
            startActivityForResult(photoPickerIntent, REQUEST_CODE_GALLERY);
        }
    });
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode != Activity.RESULT_OK) {

        return;
    }

    switch (requestCode) {
    // pick image from gallery
        case REQUEST_CODE_GALLERY:

            try {

                InputStream inputStream = this.getContentResolver().openInputStream(data.getData());
                FileOutputStream fileOutputStream = new FileOutputStream(mFileTemp);
                copyStream(inputStream, fileOutputStream);
                fileOutputStream.close();
                inputStream.close();
                Toast.makeText(ctx, ""+mFileTemp, Toast.LENGTH_LONG).show();
            } catch (Exception e) {
            }
            break;

    }

    super.onActivityResult(requestCode, resultCode, data);
}// End of onactivityresult

/**
 * Function copyStream()-copy InputStream
 * 
 * @param input
 * @param output
 * @throws IOException
 * @return null
 */
public static void copyStream(InputStream input, OutputStream output) throws IOException {

    byte[] buffer = new byte[1024];
    int bytesRead;
    while ((bytesRead = input.read(buffer)) != -1) {
        output.write(buffer, 0, bytesRead);
    }
}// End of copyStream method

@Override
protected void onResume() {
    super.onResume();
    int numCams = Camera.getNumberOfCameras();
    if (numCams > 0) {
        try {
            camera = Camera.open(0);
            camera.startPreview();
            preview.setCamera(camera);
        } catch (RuntimeException ex) {
            Toast.makeText(ctx, getString(R.string.camera_not_found), Toast.LENGTH_LONG).show();
        }
    }
}

@Override
protected void onPause() {
    if (camera != null) {
        camera.stopPreview();
        preview.setCamera(null);
        camera.release();
        camera = null;
    }
    super.onPause();
}

private void resetCam() {
    camera.startPreview();
    preview.setCamera(camera);
}

private void refreshGallery(File file) {
    Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
    mediaScanIntent.setData(Uri.fromFile(file));
    sendBroadcast(mediaScanIntent);
}

ShutterCallback shutterCallback = new ShutterCallback() {
    public void onShutter() {
        // Log.d(TAG, "onShutter'd");
    }
};

PictureCallback rawCallback = new PictureCallback() {
    public void onPictureTaken(byte[] data, Camera camera) {
        // Log.d(TAG, "onPictureTaken - raw");
    }
};

PictureCallback jpegCallback = new PictureCallback() {
    public void onPictureTaken(byte[] data, Camera camera) {
        try {
            mFileTemp = new SaveImageTask().execute(data).get();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
        resetCam();
        Log.d(TAG, "onPictureTaken - jpeg");
    }
};

private class SaveImageTask extends AsyncTask<byte[], Void, File> {

    @Override
    protected File doInBackground(byte[]... data) {
        FileOutputStream outStream = null;
        File outFile  = null;

        // Write to SD Card
        try {
            File sdCard = Environment.getExternalStorageDirectory();
            File dir = new File(sdCard.getAbsolutePath() + "/camtest");
            dir.mkdirs();

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


            outStream = new FileOutputStream(outFile);
            outStream.write(data[0]);
            outStream.flush();
            outStream.close();

            Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length + " to " + outFile.getAbsolutePath());

            refreshGallery(outFile);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
        }
        return outFile;
    }

}

}

预览课程,

   class Preview extends ViewGroup implements SurfaceHolder.Callback {
    private final String TAG = "Preview";

    SurfaceView mSurfaceView;
    SurfaceHolder mHolder;
    Size mPreviewSize;
    List<Size> mSupportedPreviewSizes;
    Camera mCamera;
    Context mContext;

    Preview(Context context, SurfaceView sv) {
        super(context);
        mContext = context;
        mSurfaceView = sv;
//        addView(mSurfaceView);

        mHolder = mSurfaceView.getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }

    public void setCamera(Camera camera) {
        mCamera = camera;
        if (mCamera != null) {
            mSupportedPreviewSizes = mCamera.getParameters().getSupportedPreviewSizes();
            requestLayout();

            // get Camera parameters
            Camera.Parameters params = mCamera.getParameters();

            List<String> focusModes = params.getSupportedFocusModes();
            if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
                // set the focus mode
                params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
                // set Camera parameters
                mCamera.setParameters(params);
            }
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // We purposely disregard child measurements because act as a
        // wrapper to a SurfaceView that centers the camera preview instead
        // of stretching it.
        final int width = resolveSize(getSuggestedMinimumWidth(), widthMeasureSpec);
        final int height = resolveSize(getSuggestedMinimumHeight(), heightMeasureSpec);
        setMeasuredDimension(width, height);

        if (mSupportedPreviewSizes != null) {
            mPreviewSize = getOptimalPreviewSize(mSupportedPreviewSizes, width, height);
        }
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        if (changed && getChildCount() > 0) {
            final View child = getChildAt(0);

            final int width = r - l;
            final int height = b - t;

            int previewWidth = width;
            int previewHeight = height;
            if (mPreviewSize != null) {
                previewWidth = mPreviewSize.width;
                previewHeight = mPreviewSize.height;
            }

            // Center the child SurfaceView within the parent.
            if (width * previewHeight > height * previewWidth) {
                final int scaledChildWidth = previewWidth * height / previewHeight;
                child.layout((width - scaledChildWidth) / 2, 0,
                        (width + scaledChildWidth) / 2, height);
            } else {
                final int scaledChildHeight = previewHeight * width / previewWidth;
                child.layout(0, (height - scaledChildHeight) / 2,
                        width, (height + scaledChildHeight) / 2);
            }
        }
    }

    public void surfaceCreated(SurfaceHolder holder) {
        // The Surface has been created, acquire the camera and tell it where
        // to draw.
        try {
            if (mCamera != null) {
                mCamera.setPreviewDisplay(holder);
                mCamera.startPreview();
            }
        } catch (IOException exception) {
            Log.e(TAG, "IOException caused by setPreviewDisplay()", exception);
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // Surface will be destroyed when we return, so stop the preview.
        if (mCamera != null) {
            mCamera.stopPreview();
        }
    }


    private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
        final double ASPECT_TOLERANCE = 0.1;
        double targetRatio = (double) w / h;
        if (sizes == null) return null;

        Size optimalSize = null;
        double minDiff = Double.MAX_VALUE;

        int targetHeight = h;

        // Try to find an size match aspect ratio and size
        for (Size size : sizes) {
            double ratio = (double) size.width / size.height;
            if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }

        // Cannot find the one match the aspect ratio, ignore the requirement
        if (optimalSize == null) {
            minDiff = Double.MAX_VALUE;
            for (Size size : sizes) {
                if (Math.abs(size.height - targetHeight) < minDiff) {
                    optimalSize = size;
                    minDiff = Math.abs(size.height - targetHeight);
                }
            }
        }
        return optimalSize;
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        if(mCamera != null) {
            Camera.Parameters parameters = mCamera.getParameters(); 
//          parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
            Display display = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();

                if(display.getRotation() == Surface.ROTATION_0)
                {
                    parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);                           
                    mCamera.setDisplayOrientation(90);
                }

                if(display.getRotation() == Surface.ROTATION_90)
                {
                    parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);                           
                }

                if(display.getRotation() == Surface.ROTATION_180)
                {
                    parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);               
                }

                if(display.getRotation() == Surface.ROTATION_270)
                {
                    parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
                    mCamera.setDisplayOrientation(180);
                }

                requestLayout();


            mCamera.setParameters(parameters);
            mCamera.startPreview();
        }
    }

}

2 个答案:

答案 0 :(得分:1)

这不是你的错。不同设备具有不同的默认摄像机角度如果你想转动你的照片:

String path = *your_image_path*;
Bitmap scaledBitmap = null;
ExifInterface ei = new ExifInterface(path);
int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
    scaledBitmap = ScalingUtilities.createScaledBitmap(unscaledBitmap, unscaledBitmap.getWidth(), unscaledBitmap.getHeight(),ScalingLogic.FIT, 90);
case ExifInterface.ORIENTATION_ROTATE_180:
    scaledBitmap = ScalingUtilities.createScaledBitmap(unscaledBitmap, unscaledBitmap.getWidth(), unscaledBitmap.getHeight(),ScalingLogic.FIT, 180);

答案 1 :(得分:1)

我使用相机旋转值解决了类似的问题:

Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
int cameraRotation = info.orientation;

图像应旋转相同的角度。