如何检查图像大小小于100kb android

Question

我正试图从图库中获取图像并将其设置为开启ImageView,听到没关系我得到并设置图像ImageView,但现在我想检查所选图像的图像大小,kb所以我设置了图像上传的验证.请任何人都可以建议我如何检查选定的图像尺寸是否小于100kb？,听到我的图像选择和设置它的代码.

选择图像使用 Intent

 Intent iv = new Intent(
                    Intent.ACTION_PICK,
                    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

            startActivityForResult(iv, RESULT_LOAD_IMAGE);

并获取图像结果代码..

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
        Uri selectedImage = data.getData();
        String[] filePathColumn = { MediaStore.Images.Media.DATA };

        Cursor cursor = getContentResolver().query(selectedImage,
                filePathColumn, null, null, null);
        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        picturePath = cursor.getString(columnIndex);
        cursor.close();
        Bitmap bmp=BitmapFactory.decodeFile(picturePath);

        ivLogo.setImageBitmap(bmp);
            uploadNewPic();
    }
}

Answer 1

要知道尺寸小于100kb.你应该知道要比较的图像大小.有一些方法可以知道位图的大小

方法1

 Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(), 
        R.drawable.ic_launcher);


 Bitmap bitmap = bitmapOrg;
 ByteArrayOutputStream stream = new ByteArrayOutputStream();   
 bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);   
 byte[] imageInByte = stream.toByteArray(); 
 long lengthbmp = imageInByte.length; 

方法2

 File file = new File("/sdcard/Your_file");
 long length = file.length() / 1024; // Size in KB

更多研究

去http://developer.android.com/reference/android/graphics/Bitmap.html#getByteCount%28%29

Answer 2

获取文件大小为

File img = new File(picturePath);
int length = img.length();

它将以字节为单位返回大小。您可以将字节转换为 kb