android之View的启动过程

在看鸿洋的博客（http://blog.csdn.net/lmj623565791/article/details/43649913）的时候，在做自定义控件的时候，发现了onSizeChanged()，与dispatchDraw()等方法，所以想了解一下，他们的顺序，所以就写了一段代码，做了一个测试，这里做一个记录．

代码：

    public class TestView extends View {  
      
        public TestView(Context context) {  
            super(context);  
            Log.d("myTestView", "TestView context");  
        }  
      
             public TestView(Context context, AttributeSet attrs) {  
                     super(context, attrs);  
                     Log.d("myTestView", "TestView context, attrs="+attrs.getAttributeValue(0));  
             }    
          
        public TestView(Context context, AttributeSet attrs, int defStyle) {  
            super(context, attrs, defStyle);  
            Log.d("myTestView", "TestView context,attrs,defStyle attrs="+attrs.getAttributeValue(0));  
        }  
      
      
          
        @Override  
        protected void onDraw(Canvas canvas) {  
            super.onDraw(canvas);  
            Log.d("myTestView", "onDraw");  
        }  
      
        @Override  
        protected void onFinishInflate() {  
            super.onFinishInflate();  
            Log.d("myTestView", "onFinishInflate");  
        }  
      
      
      
        @Override  
        protected void onSizeChanged(int w, int h, int oldw, int oldh) {  
            super.onSizeChanged(w, h, oldw, oldh);  
            Log.d("myTestView", "onSizeChanged,w="+w+",h="+h+",oldw="+oldw+",oldh="+oldh);  
        }  
      
    }  

结果：

20:13:23.287: D/myTestView(9715): TestView context, attrs=@2131034211  
20:13:23.297: D/myTestView(9715): onFinishInflate  
20:13:23.367: D/myTestView(9715): onSizeChanged,w=540,h=960,oldw=0,oldh=0  
20:13:23.427: D/myTestView(9715): onDraw  
20:13:23.457: D/myTestView(9715): onDraw