在我的应用程序中,我添加了图像上传功能,它可以很好地处理除相机图像以外的所有图像,每当我从图库浏览相机图像时,纵向图像旋转90度。。下面是我的代码片段。。有人能帮我吗?我学习了很多教程,但它们在kikat都很好,但当同一个教程不适用于ics、jellybean等时。

public class MainActivity extends Activity {
private Button browse;
private String selectedImagePath="";
private ImageView img;

private TextView messageText;

private static int SELECT_PICTURE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    img = (ImageView)findViewById(R.id.imagevw);
    browse=(Button)findViewById(R.id.browseimg);
    messageText  = (TextView)findViewById(R.id.messageText);
    browse.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
             Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(Intent.createChooser(intent,"Select Picture"), SELECT_PICTURE);
        }
    });
}
 @Override
   public void onActivityResult(int requestCode, int resultCode, Intent data) {
       if (resultCode == RESULT_OK) {
           if (requestCode == SELECT_PICTURE) {
               Uri selectedImageUri = data.getData();

               /*String filePath = getRealPathFromURI(getActivity(), selectedImageUri );
               messageText.setText(filePath );
               Picasso.with(getActivity())
                                      .load(new File(filePath ))
                                      .centerCrop()
                                      .resize(60, 60).into( img);*/

               selectedImagePath = getPath(selectedImageUri);
               messageText.setText(selectedImagePath);
               System.out.println(requestCode);
               System.out.println("Image Path : " + selectedImagePath);
               img.setImageURI(selectedImageUri);
           }
       }
 }
 @SuppressWarnings("deprecation")
    public String getPath(Uri uri) {
       String[] projection = { MediaStore.Images.Media.DATA };
       Cursor cursor = managedQuery(uri, projection, null, null, null);
       int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
       cursor.moveToFirst();
       return cursor.getString(column_index);
   }

   }

最佳答案

包括这个代码

public void rotateImage(String file) throws IOException{

    BitmapFactory.Options bounds = new BitmapFactory.Options();
    bounds.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(file, bounds);

    BitmapFactory.Options opts = new BitmapFactory.Options();
    Bitmap bm = BitmapFactory.decodeFile(file, opts);

    int rotationAngle = getCameraPhotoOrientation(getActivity(), Uri.fromFile(file1), file1.toString());

    Matrix matrix = new Matrix();
    matrix.postRotate(rotationAngle, (float) bm.getWidth() / 2, (float) bm.getHeight() / 2);
    Bitmap rotatedBitmap = Bitmap.createBitmap(bm, 0, 0, bounds.outWidth, bounds.outHeight, matrix, true);
    FileOutputStream fos=new FileOutputStream(file);
    rotatedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
    fos.flush();
    fos.close();
}

public static int getCameraPhotoOrientation(Context context, Uri imageUri, String imagePath){
    int rotate = 0;
    try {
        context.getContentResolver().notifyChange(imageUri, null);
        File imageFile = new File(imagePath);
        ExifInterface exif = new ExifInterface(imageFile.getAbsolutePath());
        int orientation = exif.getAttributeInt(
                ExifInterface.TAG_ORIENTATION,
                ExifInterface.ORIENTATION_UNDEFINED);
        switch (orientation) {
        case ExifInterface.ORIENTATION_NORMAL:
            rotate = 0;
        case ExifInterface.ORIENTATION_ROTATE_270:
            rotate = 270;
            break;
        case ExifInterface.ORIENTATION_ROTATE_180:
            rotate = 180;
            break;
        case ExifInterface.ORIENTATION_ROTATE_90:
            rotate = 90;
            break;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return rotate;
}

09-10 06:04
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