--------------------------------------------------------------------------------
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