Android 设置thumb图片大小

  android:thumb="@drawable/seekbar_thumb"

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- 普通无焦点状态 -拖动按钮 -->
    <item android:drawable="@drawable/tiny" android:state_focused="false" android:state_pressed="false"/>
    <!-- 有焦点状态 -->
    <item android:drawable="@drawable/tiny" android:state_focused="true" android:state_pressed="false"/>
    <!-- 有焦点 -->
    <item android:drawable="@drawable/tiny" android:state_focused="true"/>

</selector>

    private int seekWidth = 60;
    private int seekHeight = 30;
    private SeekBar seek;    
        seek = (SeekBar) findViewById(R.id.seekBar);
        Drawable drawable = getNewDrawable(HandDraw.this,R.drawable.tiny, seekWidth, seekHeight);
        seek.setThumb(drawable);     

//调用函数缩小图片
       public BitmapDrawable getNewDrawable(Activity context, int restId, int                           dstWidth, int dstHeight){
           Bitmap Bmp = BitmapFactory. decodeResource(
           context.getResources(), restId);
           Bitmap bmp = Bmp.createScaledBitmap(Bmp, dstWidth, dstHeight, true);
           BitmapDrawable d = new BitmapDrawable(bmp);
           Bitmap bitmap = d.getBitmap();  
           if (bitmap.getDensity() == Bitmap.DENSITY_NONE) {  
               d.setTargetDensity(context.getResources().getDisplayMetrics());  
           }
           return d;
     }