[Android]在RadioButton上显示图片和文字

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);

if(image!=null){
Paint pt = new Paint();
pt.setARGB(255,66,66,66);
//消除锯齿
pt.setAntiAlias(true);
//居中显示图片
int imageX=(int)(this.getWidth()-image.getWidth())/2;

canvas.drawBitmap(image,imageX,5,pt);
pt.setARGB(255,255,255,255);
//居中显示字符串
int strX=(int)(this.getWidth()-name.getBytes().length*5.5)/2;
canvas.drawText(name,strX,(image.getHeight()+15),pt);
}

}