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

2022-08-16 18:27:18

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：

[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

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