diff --git a/Application/src/main/java/com/xypower/mppreview/Camera2RawFragment.java b/Application/src/main/java/com/xypower/mppreview/Camera2RawFragment.java
index f43d2b0..e6fd3d7 100644
--- a/Application/src/main/java/com/xypower/mppreview/Camera2RawFragment.java
+++ b/Application/src/main/java/com/xypower/mppreview/Camera2RawFragment.java
@@ -275,6 +275,7 @@ public class Camera2RawFragment extends Fragment
      * ID of the current {@link CameraDevice}.
      */
     private String mCameraId;
+    private boolean mHdr = false;
 
     /**
      * A {@link CameraCaptureSession } for camera preview.
@@ -496,7 +497,7 @@ public class Camera2RawFragment extends Fragment
             String currentDateTime = generateTimestamp();
             File jpegFile = new File(Environment.
                     getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM),
-                    "JPEG_" + currentDateTime + ".jpg");
+                    "IMG_" + currentDateTime + ".jpg");
 
             // Look up the ImageSaverBuilder for this request and update it with the file name
             // based on the capture start time.
@@ -579,6 +580,12 @@ public class Camera2RawFragment extends Fragment
     @Override
     public void onViewCreated(final View view, Bundle savedInstanceState) {
 
+        Activity activity = getActivity();
+        Intent intent = activity.getIntent();
+        if (intent != null) {
+            mHdr = intent.getBooleanExtra("hdr", false);
+        }
+
         Resources resources = getResources();
         ImageView imageView = (ImageView)view.findViewById(R.id.picture);
         imageView.setImageDrawable(resources.getDrawable(R.drawable.ic_take_photo));
@@ -1224,9 +1231,7 @@ public class Camera2RawFragment extends Fragment
             // Create an ImageSaverBuilder in which to collect results, and add it to the queue
             // of active requests.
             ImageSaver.ImageSaverBuilder jpegBuilder = new ImageSaver.ImageSaverBuilder(activity)
-                    .setCharacteristics(mCharacteristics);
-            ImageSaver.ImageSaverBuilder rawBuilder = new ImageSaver.ImageSaverBuilder(activity)
-                    .setCharacteristics(mCharacteristics);
+                    .setCharacteristics(mCharacteristics).setHdr(mHdr);
 
             mJpegResultQueue.put((int) request.getTag(), jpegBuilder);
 
@@ -1328,6 +1333,8 @@ public class Camera2RawFragment extends Fragment
          */
         private final CaptureResult mCaptureResult;
 
+        private final boolean mHdr;
+
         /**
          * The CameraCharacteristics for this camera device.
          */
@@ -1343,11 +1350,12 @@ public class Camera2RawFragment extends Fragment
          */
         private final RefCountedAutoCloseable<ImageReader> mReader;
 
-        private ImageSaver(Image image, File file, CaptureResult result,
+        private ImageSaver(boolean hdr, Image image, File file, CaptureResult result,
                            CameraCharacteristics characteristics, Context context,
                            RefCountedAutoCloseable<ImageReader> reader) {
             mImage = image;
             mFile = file;
+            mHdr = hdr;
             mCaptureResult = result;
             mCharacteristics = characteristics;
             mContext = context;
@@ -1375,8 +1383,16 @@ public class Camera2RawFragment extends Fragment
                             success = bm2.compress(Bitmap.CompressFormat.JPEG, 95, output);
                             bm2.recycle();
                         } else {
-                            output.write(bytes);
-                            success = true;
+                            if (mHdr) {
+                                Bitmap bm = BitmapFactory.decodeByteArray(bytes, 0, bytes.length, null);
+                                Bitmap bm2 = flipBitmap180(bm);
+                                bm.recycle();
+                                success = bm2.compress(Bitmap.CompressFormat.JPEG, 95, output);
+                                bm2.recycle();
+                            } else {
+                                output.write(bytes);
+                                success = true;
+                            }
                         }
                     } catch (IOException e) {
                         e.printStackTrace();
@@ -1444,6 +1460,20 @@ public class Camera2RawFragment extends Fragment
             return new2;
         }
 
+        private Bitmap flipBitmap180(Bitmap bitmap) {
+            if (null == bitmap) {
+                return null;
+            }
+            int width = bitmap.getWidth();
+            int height = bitmap.getHeight();
+            Matrix m = new Matrix();
+            // m.postScale(-1, 1); //镜像水平翻转
+            m.postScale(1, -1); //镜像垂直翻转
+            //m.postRotate(-90); //旋转-90度
+            Bitmap new2 = Bitmap.createBitmap(bitmap, 0, 0, width, height, m, true);
+            return new2;
+        }
+
         /**
          * Builder class for constructing {@link ImageSaver}s.
          * <p/>
@@ -1452,6 +1482,7 @@ public class Camera2RawFragment extends Fragment
         public static class ImageSaverBuilder {
             private Image mImage;
             private File mFile;
+            private boolean mHdr;
             private CaptureResult mCaptureResult;
             private CameraCharacteristics mCharacteristics;
             private Context mContext;
@@ -1481,6 +1512,11 @@ public class Camera2RawFragment extends Fragment
                 return this;
             }
 
+            public synchronized ImageSaverBuilder setHdr(final boolean hdr) {
+                mHdr = hdr;
+                return this;
+            }
+
             public synchronized ImageSaverBuilder setFile(final File file) {
                 if (file == null) throw new NullPointerException();
                 mFile = file;
@@ -1504,7 +1540,7 @@ public class Camera2RawFragment extends Fragment
                 if (!isComplete()) {
                     return null;
                 }
-                return new ImageSaver(mImage, mFile, mCaptureResult, mCharacteristics, mContext,
+                return new ImageSaver(mHdr, mImage, mFile, mCaptureResult, mCharacteristics, mContext,
                         mReader);
             }
 
@@ -1685,7 +1721,7 @@ public class Camera2RawFragment extends Fragment
      * @return a {@link String} representing a time.
      */
     private static String generateTimestamp() {
-        SimpleDateFormat sdf = new SimpleDateFormat("yyyy_MM_dd_HH_mm_ss_SSS", Locale.US);
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss_SSS", Locale.US);
         return sdf.format(new Date());
     }
 
@@ -1737,7 +1773,7 @@ public class Camera2RawFragment extends Fragment
     }
 
     private int getRotationAdjustment() {
-        return TextUtils.equals(mCameraId, "1") ? 90 : 0;
+        return TextUtils.equals(mCameraId, "1") ? 270 : 0;
     }
 
     /**
diff --git a/Application/src/main/java/com/xypower/mppreview/MainActivity.java b/Application/src/main/java/com/xypower/mppreview/MainActivity.java
index 257dacd..abc0d67 100644
--- a/Application/src/main/java/com/xypower/mppreview/MainActivity.java
+++ b/Application/src/main/java/com/xypower/mppreview/MainActivity.java
@@ -43,12 +43,12 @@ public class MainActivity extends Activity {
 
     protected void takePhoto(int channel, boolean hdr) {
         int cameraId = channel - 1;
-        if (channel == 1 && hdr) {
-            cameraId = 1;
-        }
 
         Intent intent = new Intent(MainActivity.this, CameraActivity.class);
         intent.putExtra("cameraId", cameraId);
+        if (channel == 1) {
+            intent.putExtra("hdr", hdr);
+        }
         startActivity(intent);
     }
 }
\ No newline at end of file