从 ExifInterface 获取旋转总是返回 0
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【中文标题】从 ExifInterface 获取旋转总是返回 0【英文标题】：Getting rotation from ExifInterface always returns 0 【发布时间】：2014-07-30 11:16:12 【问题描述】：我正在从相机通过 onActivityResult 上的捆绑包传递位图。
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, "picture");
mCapturedImageURI = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
intent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
startActivityForResult(intent, REQUEST_TAKE_PHOTO);
我可以得到位图：
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), mCapturedImageURI);
但是，我注意到图像在某些设备上会旋转。在这里搜索帖子后，典型的解决方案似乎是通过以下方式获得轮换：
String path = mCapturedImageURI.getPath();
ExifInterface exif = new ExifInterface(path);
int rotation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
不幸的是，我的int rotation 始终为 0，即使位图已旋转。
我也尝试过这个方法，当我在设备上上传了一张图片但方向仍然是 0 时有效：
String[] orientationColumn = MediaStore.Images.Media.ORIENTATION;
Cursor cur = managedQuery(mCapturedImageURI, orientationColumn, null, null, null);
if (cur != null && cur.moveToFirst())
orientation = cur.getInt(cur.getColumnIndex(orientationColumn[0]));
有人看到我在这里做错了什么吗？还是其他解决方法？
一般情况下，后置摄像头逆时针旋转位图 90 度，前置摄像头顺时针旋转 90 度。在 Moto G 上工作正常。在 Galaxy S3 和 LG G2 上旋转。
【问题讨论】：
三星设备出现旋转图像问题，ExifInterface 返回正确值。您可能需要在拍照时设置Exif Tag 值。 refer to
代码看起来是正确的，我以前用过类似的东西。您使用的是标准相机应用还是自定义应用？
【参考方案1】：
尝试使用内容光标中的信息。
float photoRotation = 0;
boolean hasRotation = false;
String[] projection = Images.ImageColumns.ORIENTATION ;
try
Cursor cursor = getActivity().getContentResolver().query(photoUri, projection, null, null, null);
if (cursor.moveToFirst())
photoRotation = cursor.getInt(0);
hasRotation = true;
cursor.close();
catch (Exception e)
if (!hasRotation)
ExifInterface exif = new ExifInterface(photoUri.getPath());
int exifRotation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_UNDEFINED);
switch (exifRotation)
case ExifInterface.ORIENTATION_ROTATE_90:
photoRotation = 90.0f;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
photoRotation = 180.0f;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
photoRotation = 270.0f;
break;
【讨论】：
photoUri;您是通过EXTRA_OUTPUT 设置它还是通过data.getData() 从意图设置它？
在我的例子中，它是 data.getData()。
如果您使用的是三星设备，则使用光标是最好的方法，因为它们不会保存任何 exif 数据。感谢分享！【参考方案2】：
试试这个方法，希望能帮助你解决问题。
activity_main.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical" >
<LinearLayout
android:layout_
android:layout_
android:layout_weight="1"
android:gravity="center">
<ImageView
android:id="@+id/imgFromCameraOrGallery"
android:layout_
android:layout_
android:adjustViewBounds="true"
android:src="@drawable/ic_launcher"/>
</LinearLayout>
<LinearLayout
android:layout_
android:layout_>
<Button
android:id="@+id/btnCamera"
android:layout_
android:layout_weight="1"
android:layout_
android:text="Camera"/>
<Button
android:id="@+id/btnGallery"
android:layout_
android:layout_weight="1"
android:layout_marginLeft="5dp"
android:layout_
android:text="Gallery"/>
</LinearLayout>
</LinearLayout>
MainActivity.java:
public class MainActivity extends Activity
private ImageView imgFromCameraOrGallery;
private Button btnCamera;
private Button btnGallery;
private String imgPath;
final private int PICK_IMAGE = 1;
final private int CAPTURE_IMAGE = 2;
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imgFromCameraOrGallery = (ImageView) findViewById(R.id.imgFromCameraOrGallery);
btnCamera = (Button) findViewById(R.id.btnCamera);
btnGallery = (Button) findViewById(R.id.btnGallery);
btnCamera.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
final Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, setImageUri());
startActivityForResult(intent, CAPTURE_IMAGE);
);
btnGallery.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, ""), PICK_IMAGE);
);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK)
if (requestCode == CAPTURE_IMAGE)
rotateImage(getImagePath());
else if (requestCode == PICK_IMAGE)
imgFromCameraOrGallery.setImageBitmap(BitmapFactory.decodeFile(getAbsolutePath(data.getData())));
private void rotateImage(final String path)
runOnUiThread(new Runnable()
@Override
public void run()
Bitmap b = decodeFileFromPath(path);
try
ExifInterface ei = new ExifInterface(path);
int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
Matrix matrix = new Matrix();
switch (orientation)
case ExifInterface.ORIENTATION_ROTATE_90:
matrix.postRotate(90);
b = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), matrix, true);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
matrix.postRotate(180);
b = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), matrix, true);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
matrix.postRotate(270);
b = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), matrix, true);
break;
default:
b = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), matrix, true);
break;
catch (Throwable e)
e.printStackTrace();
FileOutputStream out1 = null;
File file;
try
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state))
file = new File(Environment.getExternalStorageDirectory() + "/DCIM/", "image" + new Date().getTime() + ".jpg");
else
file = new File(getFilesDir() , "image" + new Date().getTime() + ".jpg");
out1 = new FileOutputStream(file);
b.compress(Bitmap.CompressFormat.JPEG, 90, out1);
imgFromCameraOrGallery.setImageBitmap(BitmapFactory.decodeFile(file.getAbsolutePath()));
catch (Exception e)
e.printStackTrace();
finally
try
out1.close();
catch (Throwable ignore)
);
private Bitmap decodeFileFromPath(String path)
Uri uri = getImageUri(path);
InputStream in = null;
try
in = getContentResolver().openInputStream(uri);
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(in, null, o);
in.close();
int scale = 1;
int inSampleSize = 1024;
if (o.outHeight > inSampleSize || o.outWidth > inSampleSize)
scale = (int) Math.pow(2, (int) Math.round(Math.log(inSampleSize / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
in = getContentResolver().openInputStream(uri);
Bitmap b = BitmapFactory.decodeStream(in, null, o2);
in.close();
return b;
catch (FileNotFoundException e)
e.printStackTrace();
catch (IOException e)
e.printStackTrace();
return null;
public String getAbsolutePath(Uri uri)
if(Build.VERSION.SDK_INT >= 19)
String id = uri.getLastPathSegment().split(":")[1];
final String[] imageColumns = MediaStore.Images.Media.DATA ;
final String imageOrderBy = null;
Uri tempUri = getUri();
Cursor imageCursor = getContentResolver().query(tempUri, imageColumns,
MediaStore.Images.Media._ID + "="+id, null, imageOrderBy);
if (imageCursor.moveToFirst())
return imageCursor.getString(imageCursor.getColumnIndex(MediaStore.Images.Media.DATA));
else
return null;
else
String[] projection = MediaStore.MediaColumns.DATA ;
Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
if (cursor != null)
int column_index = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
else
return null;
private Uri getUri()
String state = Environment.getExternalStorageState();
if(!state.equalsIgnoreCase(Environment.MEDIA_MOUNTED))
return MediaStore.Images.Media.INTERNAL_CONTENT_URI;
return MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
private Uri getImageUri(String path)
return Uri.fromFile(new File(path));
public Uri setImageUri()
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state))
File file = new File(Environment.getExternalStorageDirectory() + "/DCIM/", "image" + new Date().getTime() + ".jpg");
Uri imgUri = Uri.fromFile(file);
this.imgPath = file.getAbsolutePath();
return imgUri;
else
File file = new File(getFilesDir() , "image" + new Date().getTime() + ".jpg");
Uri imgUri = Uri.fromFile(file);
this.imgPath = file.getAbsolutePath();
return imgUri;
public String getImagePath()
return imgPath;
【讨论】：
对于imgFromCameraOrGallery.setImageBitmap(BitmapFactory.decodeFile(getAbsolutePath(data.getData())));，data 为空
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