android之View的啓動過程

轉自：http://www.cdtarena.com/gpx/201308/9607.html

程序裏調用了onSizeChanged方法進行了一些設置,不知道onSizeChanged是在什麼時候啓動的,所以研究了一下View的啓動流程

代碼如下:

publicclass TestView extends View {

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

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

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



@Override
protectedvoid onDraw(Canvas canvas) {
super.onDraw(canvas);
        Log.d("mDebug", "onDraw");
    }

@Override
protectedvoid onFinishInflate() {
super.onFinishInflate();
        Log.d("mDebug", "onFinishInflate");
    }

成都安卓培訓、成都android培訓

@Override
protectedvoid onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
        Log.d("mDebug", "onSizeChanged,w="+w+",h="+h+",oldw="+oldw+",oldh="+oldh);
    }

}

輸出如下:http://www.cdtarena.com/net.html

22:23:03.587: D/mDebug(9715): TestView context, attrs=@2131034112
22:23:03.597: D/mDebug(9715): onFinishInflate
22:23:03.667: D/mDebug(9715): onSizeChanged,w=720,h=1080,oldw=0,oldh=0
22:23:03.727: D/mDebug(9715): onDraw
22:23:03.757: D/mDebug(9715): onDraw

很顯然,onSizeChanged的啓動時間在onDraw之前