Handler传递数据更新进度条

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主要接受子线程发送的数据，并用此数据配合主线程更新UI。

Handler中分发消息的一些方法

post(Runnable)

postAtTime(Runnable，long)

postDelayed(Runnable long)

sendEmptyMessage(int)

sendMessage(Message)

sendMessageAtTime(Message，long)

sendMessageDelayed(Message，long)

package com.example.android_test;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Menu;import android.view.MenuItem;import android.widget.ProgressBar;import android.widget.Toast;public class MainActivity extends Activity {ProgressBar progressBar;int proLine=0;MyThread mThread;Handler mHandler=new Handler(){@Overridepublic void handleMessage(Message msg) {if (msg.what==0x111) {progressBar.setProgress(proLine);System.out.println(proLine);}};};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);progressBar=(ProgressBar) findViewById(R.id.progressBar1);mThread=new MyThread();mThread.start();}class MyThread extends Thread{@Overridepublic void run() {while (proLine<100) {proLine++;mHandler.sendEmptyMessage(0x111);try {sleep(200);} catch (InterruptedException e) {e.printStackTrace();}}}}}

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