android Paint 设置线宽setStrokeWidth()的单位

首先画一个空心的矩形框，代码如下：

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        ImageView image = (ImageView) findViewById(R.id.image);
        
        Bitmap bitmap = Bitmap.createBitmap(800, 480, Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        canvas.drawColor(Color.BLUE);
        Rect rect = new Rect(0, 0, 800, 480);
        Paint paint= new Paint();
        paint.setStyle(Style.STROKE);
        paint.setColor(Color.RED);
        paint.setStrokeWidth(2);//这个地方改线宽,单位是像素
	canvas.drawRect(rect, paint);
	image.setImageBitmap(bitmap);
    }
    
}

这时遇到的问题是画矩形框的线宽的单位是什么？

答案是像素。答案来源一方面是自己试，另一方面是来自以下链接：

http://stackoverflow.com/questions/4789806/what-unit-of-measure-does-paint-setstrokewidth-use