Question

我已经在我的Android应用程序中包含了来自gallery选项的照片，代码附在下面。

       Intent intent = getIntent();
       Uri data = intent.getData();  

       // Figure out what to do based on the intent type
       if (intent.getType().indexOf("image/") != -1) {
       // Handle intents with image data ...

        Uri imageUri = (Uri) intent.getParcelableExtra(Intent.EXTRA_STREAM);
        Context context1=this;
    Cursor cursor = null;  
        String[] proj = { MediaStore.Images.Media.DATA };
        cursor = context1.getContentResolver().query(imageUri,  proj, null, null, null);
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String path=cursor.getString(column_index);
        name=path.substring(path.lastIndexOf("/")+1);
        mBitmap =MediaStore.Images.Media.getBitmap(this.getContentResolver(),imageUri); 
        ByteArrayOutputStream bos=new ByteArrayOutputStream();
        mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);
        img = bos.toByteArray();
        strImage = Base64.encodeToString(img, Base64.DEFAULT);

但是当我使用大图像时，应用程序崩溃了。我按照this问题解决了问题，但对以下代码中提到的所需大小仍有疑问

static Bitmap decodeUri(Context c, Uri uri, final int requiredSize) 
           throws FileNotFoundException {
       BitmapFactory.Options o = new BitmapFactory.Options();
       o.inJustDecodeBounds = true;
       BitmapFactory.decodeStream(c.getContentResolver().openInputStream(uri), null, o);

       int width_tmp = o.outWidth
               , height_tmp = o.outHeight;
       int scale = 1;

       while(true) {
           if(width_tmp / 2 < requiredSize || height_tmp / 2 < requiredSize)
               break;
           width_tmp /= 2;
           height_tmp /= 2;
           scale *= 2;
       }

       BitmapFactory.Options o2 = new BitmapFactory.Options();
       o2.inSampleSize = scale;
       return BitmapFactory.decodeStream(c.getContentResolver().openInputStream(uri), null, o2);
   }

是否有任何选项可以按照以下简单方法调整图像大小

  //Convert Bitmap to Byte Array:-
                        BitmapFactory.Options options = new BitmapFactory.Options();

                        // downsizing image as it throws OutOfMemory Exception for larger
                        // images
                       options.inSampleSize = 8;
                        bitmap = BitmapFactory.decodeFile(filePath,options);

如果没有这样的方法，那么代码中提到的所需大小是什么，以便应用程序不会崩溃。请帮我解决这个问题..

在包含来自图库的大图像的同时关闭力量

0 个答案: