专辑艺术品从MP3

Question

我设法从我的mp3文件（在SD卡上）读专辑封面，但图片是 biger比活动。我如何缩小（压缩）图片为150x150像素？

Answer 1

您可以使用 “fitXY” 以缩放的ImageView：

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

您可以通过编程设定的ImageView的来源。

Answer 2

下面这段代码就可以了;）

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; 
    }