捕获的图像始终显示横向并且 setRotate 无法解析

Posted 2023-04-17

【中文标题】捕获的图像始终显示横向并且 setRotate 无法解析

【英文标题】：Captured image always shows landscape and setRotate cannot be resolved

【发布时间】：2016-02-07 02:08:01

【问题描述】：

这里有很多类似的主题和问题，我关注this。但我得到了错误。

我的代码

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) 

    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode == RESULT_OK) 
        if (requestCode == 1) 
            //h=0;
            File f = new File(Environment.getExternalStorageDirectory().toString());
            for (File temp : f.listFiles()) 
                if (temp.getName().equals("temp.jpg")) 
                    f = temp;
                    File photo = new File(Environment.getExternalStorageDirectory(), "temp.jpg");
                    //pic = photo;
                    break;
                
            

            try 
                Bitmap bitmap;
                BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
                bitmapOptions.inJustDecodeBounds = false;
                bitmapOptions.inPreferredConfig = Bitmap.Config.RGB_565;
                bitmapOptions.inDither = true;
                bitmap = BitmapFactory.decodeFile(f.getAbsolutePath(), bitmapOptions);
                Global.img = bitmap;

                b.setImageBitmap(bitmap);
                String path = android.os.Environment.getExternalStorageDirectory() + File.separator + "Phoenix" + File.separator + "default";
                //p = path;
                f.delete();
                OutputStream outFile = null;
                File file = new File(path, String.valueOf(System.currentTimeMillis()) + ".jpg");
                try 

                    outFile = new FileOutputStream(file);
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 85, outFile);
                    //pic=file;
                    outFile.flush();
                    outFile.close();


                 catch (FileNotFoundException e) 
                    e.printStackTrace();

                 catch (IOException e) 
                    e.printStackTrace();

                 catch (Exception e) 
                    e.printStackTrace();
                

             catch (Exception e) 
                e.printStackTrace();

            

         else if (requestCode == 2) 

            Uri selectedImage = data.getData();
            // h=1;
            //imgui = selectedImage;
            String[] filePath = MediaStore.Images.Media.DATA;
            Cursor c = getContentResolver().query(selectedImage, filePath, null, null, null);
            c.moveToFirst();
            int columnIndex = c.getColumnIndex(filePath[0]);
            String picturePath = c.getString(columnIndex);
            c.close();
            Bitmap thumbnail = (BitmapFactory.decodeFile(picturePath));
            Log.w("path of image ******", picturePath + "");
            b.setImageBitmap(thumbnail);
        


    
    else
    
        finish();
    

按照教程完成后，我已将代码更改为

  try 
             Bitmap bitmap;
             BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
             bitmapOptions.inJustDecodeBounds = false;
             bitmapOptions.inPreferredConfig = Bitmap.Config.RGB_565;
             bitmapOptions.inDither = true;
             bitmap = BitmapFactory.decodeFile(f.getAbsolutePath(), bitmapOptions);
              BitmapFactory.Options opts = new BitmapFactory.Options();
              Bitmap bm = BitmapFactory.decodeFile(f.getAbsolutePath(), opts);
              ExifInterface exif = new ExifInterface(f.getAbsolutePath());
              String orientString = exif.getAttribute(ExifInterface.TAG_ORIENTATION);
              int orientation = orientString != null ? Integer.parseInt(orientString) :  ExifInterface.ORIENTATION_NORMAL;
               int rotationAngle = 0;
               if (orientation == ExifInterface.ORIENTATION_ROTATE_90) rotationAngle = 90;
               if (orientation == ExifInterface.ORIENTATION_ROTATE_180) rotationAngle = 180;
               if (orientation == ExifInterface.ORIENTATION_ROTATE_270) rotationAngle = 270;
               Matrix matrix = new Matrix();
               matrix.setRotate(rotationAngle, (float) bm.getWidth() / 2, (float) bm.getHeight() / 2);
               Bitmap rotatedBitmap = Bitmap.createBitmap(bm, 0, 0, bitmapOptions.outWidth, bitmapOptions.outHeight, matrix, true);
               Global.img = bitmap;
               b.setImageBitmap(bitmap);
               String path = android.os.Environment
                          .getExternalStorageDirectory()
                           + File.separator
                           + "Phoenix" + File.separator + "default";
                    //p = path;

                    f.delete();

                    OutputStream outFile = null;

                    File file = new File(path, String.valueOf(System.currentTimeMillis()) + ".jpg");

matrix.setRotate 中的 setRotate 无法解决。 (bm, 0, 0, bitmapOptions.outWidth, bitmapOptions.outHeight, matrix, true); 下方出现一条红线（无法解析方法 createBitmap）

*********编辑*********

在我导入 android.graphics.Matrix 而不是 android.opengl.Matrix, 后，应用程序崩溃了。

LogCat 错误

  Process: com.example.project.project, PID: 13045
    java.lang.OutOfMemoryError
            at android.graphics.Bitmap.nativeCreate(Native Method)
            at android.graphics.Bitmap.createBitmap(Bitmap.java:928)
            at android.graphics.Bitmap.createBitmap(Bitmap.java:901)
            at android.graphics.Bitmap.createBitmap(Bitmap.java:833)
            at com.example.project.project.ImageFitScreen.onActivityResult(ImageFitScreen.java:236)
            at android.app.Activity.dispatchActivityResult(Activity.java:5643)

这是第 236 行

 Bitmap rotatedBitmap = Bitmap.createBitmap(bm, 0, 0, bitmapOptions.outWidth, bitmapOptions.outHeight, matrix, true);

【参考方案1】：

改成这个Bitmap rotateBitmap = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(),matrix, true);

【讨论】：

我仍然遇到同样的错误。之间，变量rotatedBitmap 从未使用过。我按照教程进行操作，但没有显示应该在哪里分配 rotatedBitmap

如果你想解决你的旋转问题，你需要使用你在代码中分配的rotatedBitmap

接下来我应该写什么？如何使用？

Global.img = rotateBitmap ; b.setImageBitmap(rotatedBitmap)

仍然遇到同样的错误11-06 12:18:12.836 1874-1874/com.example.project.project E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.example.project.project, PID: 1874 java.lang.OutOfMemoryError at android.graphics.Bitmap.nativeCreate(Native Method) at android.graphics.Bitmap.createBitmap(Bitmap.java:928) at android.graphics.Bitmap.createBitmap(Bitmap.java:901) at android.graphics.Bitmap.createBitmap(Bitmap.java:833) at com.example.project.project.ImageFitScreen.onActivityResult(ImageFitScreen.java:236)

【参考方案2】：

我猜你导入了错误的 Matrix 类，你应该导入 android.graphics.Matrix，而不是 android.opengl.Matrix，请仔细检查。