android Handler浅谈

首先得明白　这是浅谈，　也就是说研究不深入，后续会继续跟踪.

我个人认为　android 线程间通信用　Handler +Message 方式.

进程间通信用AIDL.

呵呵，深知自己能力很差，　只是个人理解，希望明白的告诉我下.

为什么说　handler主要用于线呈间通信呢?

Java代码

package com.ray.handler;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Point;

import android.graphics.drawable.Drawable;

import android.view.View;

public class BounceView extends View {

float x = 40;

public BounceView(Context context) {

super(context);

}

@Override

protected void onDraw(Canvas canvas) {

x+=10;

Paint mPaint = new Paint();

mPaint.setAntiAlias(true);

mPaint.setColor(Color.GREEN);

canvas.drawCircle(x, 40, 40, mPaint);

}

}

上面的代码就是实现了一个简单的Widget .

package com.ray.handler;

import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.view.View;

import android.view.Window;

public class TestHandler extends Activity {

protected static final int GUIUpdateIDENTIFIER = 0x101;

Thread myRefreshThread = null;

BounceView myBounceView = null;

Handler myHandler = new Handler() {

public void handleMessage(Message msg) {

switch (msg.what) {

case TestHandler.GUIUpdateIDENTIFIER: