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我想缩小图像，使其适合我的图像按钮的大小。在这段代码中，我打开了图库，然后可以选择一张图片。问题是图像并没有按比例缩小，尽管我在我的代码中这么说。为什么这不起作用？

private static final int NEW_WIDTH = 10;
private static final int NEW_HEIGHT = 10;

protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

    switch(requestCode) { 
    case SELECT_PHOTO:
        if(resultCode == RESULT_OK){  
            Uri selectedImage = imageReturnedIntent.getData();
            String[] filePathColumn = {MediaStore.Images.Media.DATA};

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

            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String filePath = cursor.getString(columnIndex);
            cursor.close();


            Bitmap yourSelectedImage = BitmapFactory.decodeFile(filePath);
            Bitmap.createScaledBitmap(yourSelectedImage, NEW_WIDTH, NEW_HEIGHT, false);
            mImageButton.setImageBitmap(yourSelectedImage);
        }
    }
}
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1 回答 1

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好的，我自己解决了这个问题。

代替：

Bitmap.createScaledBitmap(yourSelectedImage, NEW_WIDTH, NEW_HEIGHT, false);
mImageButton.setImageBitmap(yourSelectedImage);

输入：

Bitmap bMapScaled = Bitmap.createScaledBitmap(yourSelectedImage, NEW_WIDTH, NEW_HEIGHT, true);
mImageButton.setImageBitmap(bMapScaled);

我发现这篇文章很有帮助： http ://www.higherpass.com/Android/Tutorials/Working-With-Images-In-Android/3/

于 2012-05-27T20:29:53.177 回答