从设备到设备的Android图像旋转更改

我正在尝试拍摄照片并将位图设置为imageview。但是不同的设备产生的位图旋转方式不同。从设备到设备的Android图像旋转更改

一个是三星J5黄金（180度）一个是LG G3（正常的，因为我根据这个设备写的代码）两者都有的Android 6.0（实际是samsuung有6.0.1，但我不认为这有什么差别）

这是我的代码：

private int findImageRotation(Uri uri) throws IOException { 
    ExifInterface ei = new ExifInterface(uri.getPath()); 
    int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED); 
    int degree = 0; 

    switch (orientation) { 
     case ExifInterface.ORIENTATION_ROTATE_270: 
      degree = 270; 
      break; 
     case ExifInterface.ORIENTATION_ROTATE_180: 
      degree = 180; 
      break; 
     case ExifInterface.ORIENTATION_ROTATE_90: 
      degree = 90; 
      break; 
     case ExifInterface.ORIENTATION_NORMAL: 
     default: 
      break; 
    } 

    return degree; 
} 

private Bitmap rotateImage(Bitmap source, float angle) { 
    Matrix matrix = new Matrix(); 
    matrix.postRotate(angle); 
    return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
} 

private void imageToBase64(final Uri uri, final Base64ConvertListener listener) { 
    new Handler().post(new Runnable() { 
     @Override 
     public void run() { 
      Bitmap bitmap; 
      try { 
       int degree = findImageRotation(uri); 
       bitmap = BitmapFactory.decodeStream(getContext().getContentResolver().openInputStream(uri)); 
       bitmap = rotateImage(bitmap, degree - 90); 
       if (bitmap != null) { 
        String extension = getMimeType(getContext(), uri); 
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); 

        if (extension.toLowerCase().contains("png")) 
         bitmap.compress(Bitmap.CompressFormat.PNG, 50, byteArrayOutputStream); 
        else if (extension.toLowerCase().contains("jpg") || extension.toLowerCase().contains("jpeg")) 
         bitmap.compress(Bitmap.CompressFormat.JPEG, 50, byteArrayOutputStream); 

        ivHostImage.setImageBitmap(bitmap); 
        byte[] byteArray = byteArrayOutputStream.toByteArray(); 
        listener.onConvertedToBase64("data:" + extension + ";base64," + Base64.encodeToString(byteArray, Base64.DEFAULT)); 

       } 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
    }); 
}

来源

2017-03-06 msecilmis

我也曾经为这个问题搞了好几天。最后我找到了答案。 See it.

来源

2017-03-10 07:39:46 faranjit

谢谢，它的作品。也供将来参考，以获得绝对路径; [链接]（http://stackoverflow.com/a/20559175/5973493） – msecilmis

您是否尝试过给他们manualy旋转？

ExifInterface exif; 

      try { 

      exif = new ExifInterface(photoPath);//uri.getPath() 

       } 

      catch (IOException e) { 

      e.printStackTrace(); 

      exif = null; 

       } 

      if(exif!=null){ 

      orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1); 

      } 

      //get Bitmap 
      Bitmpam bitm = ..... ; 
    //i think in your example 
    //is like : bitmap = BitmapFactory.decodeStream(getContext().getContentResolver().openInputStream(uri)); 


      if(orientation==8){//exception1 
       Matrix matrix = new Matrix(); 
       matrix.postRotate(270); 
       bitm = Bitmap.createBitmap(bitm, 0, 0, bitm.getWidth(), bitm.getHeight(), matrix, true); 
        } 
      if(orientation==6){//exception2 
       Matrix matrix = new Matrix(); 
       matrix.postRotate(90); 
       bitm = Bitmap.createBitmap(bitm, 0, 0, bitm.getWidth(), bitm.getHeight(),matrix,true); 
        } 
      if(orientation==3){//exception3 
       Matrix matrix = new Matrix(); 
       matrix.postRotate(180); 
       bitm = Bitmap.createBitmap(bitm, 0, 0, bitm.getWidth(), bitm.getHeight(),matrix,true); 
       }

它适用于我。

来源

2017-03-06 15:24:01 BooDoo

从设备到设备的Android图像旋转更改

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