android，view的执行过程onDraw、onSizeChanged，onFinishInflate

小试view的执行过程，此是入门，高手绕道。 

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此为抛砖引玉，个人看官自己发挥。 
结果如下： 

12-05 22:23:03.587: D/mDebug(9715): TestView context, attrs=@2131034112
12-05 22:23:03.597: D/mDebug(9715): onFinishInflate
12-05 22:23:03.667: D/mDebug(9715): onSizeChanged,w=240,h=282,oldw=0,oldh=0
12-05 22:23:03.727: D/mDebug(9715): onDraw
12-05 22:23:03.757: D/mDebug(9715): onDraw

[size=l代码如下：[/size] 

public class TestView extends View {

    public TestView(Context context) {
        super(context);
        Log.d("mDebug", "TestView context");
    }



    public TestView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        Log.d("mDebug", "TestView context,attrs,defStyle attrs="+attrs.getAttributeValue(0));
    }



    public TestView(Context context, AttributeSet attrs) {
        super(context, attrs);
        Log.d("mDebug", "TestView context, attrs="+attrs.getAttributeValue(0));
    }



    @Override
    protected void onDraw(Canvas canvas) {
        // TODO Auto-generated method stub
        super.onDraw(canvas);
        Log.d("mDebug", "onDraw");
    }

    @Override
    protected void onFinishInflate() {
        // TODO Auto-generated method stub
        super.onFinishInflate();
        Log.d("mDebug", "onFinishInflate");
    }



    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        // TODO Auto-generated method stub
        super.onSizeChanged(w, h, oldw, oldh);
        Log.d("mDebug", "onSizeChanged,w="+w+",h="+h+",oldw="+oldw+",oldh="+oldh);
    }

}

问题： 构造函数的context为何物，attrs从何处来 

看到这篇文章貌似解决了以上问题。 
http://blog.csdn.net/z103594643/article/details/6755017 

扩展地址：http://developer.android.com/reference/android/view/View.html