Android拍照后获取图片

Android调用相机拍照时，如果设置了保存路径则不会直接返回bitmap,反之会返回一个调整过角度的压缩的图片。

// First handle the no crop case -- just return the value.  If the
        // caller specifies a "save uri" then write the data to it's
        // stream. Otherwise, pass back a scaled down version of the bitmap
        // directly in the extras.
        if (mSaveUri != null) {
            OutputStream outputStream = null;
            try {
                outputStream = mContentResolver.openOutputStream(mSaveUri);
                outputStream.write(data);
                outputStream.close();
                setResult(RESULT_OK);
                finish();
            } catch (IOException ex) {
                // ignore exception
            } finally {
                Util.closeSilently(outputStream);
            }
        } else {
            Bitmap bitmap = createCaptureBitmap(data);
            setResult(RESULT_OK,
                    new Intent("inline-data").putExtra("data", bitmap));
            finish();
        }

public static int getExifOrientation(String filepath) {
     int degree = 0;
     ExifInterface exif = null;
     try {
         exif = new ExifInterface(filepath);
     } catch (IOException ex) {
         Log.e(TAG, "cannot read exif", ex);
     }
     if (exif != null) {
         int orientation = exif.getAttributeInt(
             ExifInterface.TAG_ORIENTATION, -1);
         if (orientation != -1) {
             // We only recognize a subset of orientation tag values.
             switch(orientation) {
                 case ExifInterface.ORIENTATION_ROTATE_90:
                     degree = 90;
                     break;
                 case ExifInterface.ORIENTATION_ROTATE_180:
                     degree = 180;
                     break;
                 case ExifInterface.ORIENTATION_ROTATE_270:
                     degree = 270;
                     break;
             }


         }
     }
     return degree;
 }


private Bitmap createCaptureBitmap(byte[] data) {
     // This is really stupid...we just want to read the orientation in
     // the jpeg header.
     String filepath = ImageManager.getTempJpegPath();
     int degree = 0;
     if (saveDataToFile(filepath, data)) {
         degree = ImageManager.getExifOrientation(filepath);
         new File(filepath).delete();
     }
	
     // Limit to 50k pixels so we can return it in the intent.
     Bitmap bitmap = Util.makeBitmap(data, 50*1024);
     bitmap = Util.rotate(bitmap, degree);
     return bitmap;
 }


public boolean saveDataToFile(String filePath, byte[] data) {
     FileOutputStream f = null;
     try {
         f = new FileOutputStream(filePath);
         f.write(data);
     } catch (IOException e) {
         return false;
     } finally {
         MenuHelper.closeSilently(f);
     }
     return true;
 }

// 这里面很多好用的代码,但是没搞懂这是哪个版本的代码？发现LG手机拍照后返回的图片没有调整过角度
https://android.googlesource.com/platform/packages/apps/Camera/+/b02ebbea2d3d98a3ab2c15cb152387b9d201dd18/src/com/android/camera