android view 中各函数的执行顺数

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：

package com.example.pulltorefreshtest;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

/**
 * Created by Administrator on 2015/7/12.
 */
public class testView extends View {
    public testView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        Log.d("------","---onMeasure");
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        Log.d("------","---onLayout");
        super.onLayout(changed, left, top, right, bottom);
    }

    @Override
    protected void onFinishInflate() {
        Log.d("------","---onFinanshInflate");
        super.onFinishInflate();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        Log.d("------","---onDraw");
        super.onDraw(canvas);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        Log.d("------","---onSizeChanged");
        super.onSizeChanged(w, h, oldw, oldh);
    }
}

 

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