android view 中各函数的执行顺数 – 指尖下的幽灵

这个就好像是 activity 的生命周期一样,如果我们要使用自定义的 view,那么就很有必要了解一下 view 的那些能够被重写的函数的执行顺序。废话不多讲,以常用的5个函数为例子,见下文:

1 package com.example.pulltorefreshtest;
2
3 import android.content.Context;
4 import android.graphics.Canvas;
5 import android.util.AttributeSet;
6 import android.util.Log;
7 import android.view.View;
8
9 /**
10 * Created by Administrator on 2015/7/12.
11 */
12 public class testView extends View {
13 public testView(Context context, AttributeSet attrs) {
14 super(context, attrs);
15 }
16
17 @Override
18 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
19 Log.d(“——“,”—onMeasure”);
20 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
21 }
22
23 @Override
24 protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
25 Log.d(“——“,”—onLayout”);
26 super.onLayout(changed, left, top, right, bottom);
27 }
28
29 @Override
30 protected void onFinishInflate() {
31 Log.d(“——“,”—onFinanshInflate”);
32 super.onFinishInflate();
33 }
34
35 @Override
36 protected void onDraw(Canvas canvas) {
37 Log.d(“——“,”—onDraw”);
38 super.onDraw(canvas);
39 }
40
41 @Override
42 protected void onSizeChanged(int w, int h, int oldw, int oldh) {
43 Log.d(“——“,”—onSizeChanged”);
44 super.onSizeChanged(w, h, oldw, oldh);
45 }
46 }

 

运行结果:

07-12 13:44:45.413 23734-23734/? D/——﹕ —onFinanshInflate
07-12 13:44:45.443 23734-23734/? D/——﹕ —onMeasure
07-12 13:44:45.493 23734-23734/? D/——﹕ —onSizeChanged
07-12 13:44:45.493 23734-23734/? D/——﹕ —onLayout
07-12 13:44:45.503 23734-23734/? D/——﹕ —onMeasure
07-12 13:44:45.503 23734-23734/? D/——﹕ —onLayout
07-12 13:44:45.503 23734-23734/? D/——﹕ —onDraw

  

本文链接:android view 中各函数的执行顺数,转载请注明。



You must enable javascript to see captcha here!

Copyright © All Rights Reserved · Green Hope Theme by Sivan & schiy · Proudly powered by WordPress

无觅相关文章插件,快速提升流量