来自mp3的专辑作品

时间:2012-05-21 11:29:06

标签: android

我设法从我的mp3文件(在SD卡上)读取专辑封面,但照片是  比活动更多。如何将图片缩小(压缩)到150x150像素?

2 个答案:

答案 0 :(得分:2)

您可以使用“fitXY”来缩放ImageView:

<ImageView android:layout_width="150dp" 
           android:layout_height="150dp"
           android:scaleType="fitXY" />

您可以通过编程方式设置ImageView的来源。

答案 1 :(得分:0)

下面这段代码可以解决问题;)

public static Bitmap decodeFile(File f, boolean goodQuality){
        try {
            //Decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            BitmapFactory.decodeStream(new FileInputStream(f),null,o);

            //The new size we want to scale to
            final int REQUIRED_SIZE=100;

            //Find the correct scale value. It should be the power of 2.
            int scale=1;
            if(!goodQuality){
                while(o.outWidth/scale/2>=REQUIRED_SIZE && o.outHeight/scale/2>=REQUIRED_SIZE)
                    scale*=2;
            }
            //Decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize=scale;
            return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
        } catch (FileNotFoundException e) {}
        return null;
    }