android------进度条ProgressBar

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1、main.xml代码：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical">     <Button        android:id="@+id/mybutton"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/mybutton" />    <ProgressBar       android:id="@+id/progress01"       style="?android:attr/progressBarStyleHorizontal"       android:layout_width="200dp"       android:layout_height="wrap_content"       android:visibility="gone" />    <ProgressBar        android:id="@+id/progress02"        style="?android:attr/progressBarStyle"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:visibility="gone"/>    <Button        android:id="@+id/buttonstart"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/button02"/><ProgressBar        android:id="@+id/progress03"        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="200dp"       android:layout_height="wrap_content"        android:visibility="gone"/>    </LinearLayout>

2、string.xml代码：

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="app_name">PregeessBar</string>    <string name="action_settings">Settings</string>    <string name="mybutton">2个进度条</string><string name="button02">1个进度条</string></resources>

3、Activity01.java代码：

package com.example.pregeessbar;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ProgressBar;public class Activity01 extends Activity {private ProgressBar progress01=null;private ProgressBar progress02=null;private ProgressBar progress03=null;private Button mybutton=null;private Button buttonstart=null;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);mybutton=(Button)findViewById(R.id.mybutton);buttonstart=(Button)findViewById(R.id.buttonstart);progress01=(ProgressBar)findViewById(R.id.progress01);progress02=(ProgressBar)findViewById(R.id.progress02);progress03=(ProgressBar)findViewById(R.id.progress03);mybutton.setOnClickListener(new buttonListener());buttonstart.setOnClickListener(new OnClickListener(){public void onClick(View v) {progress03.setVisibility(View.VISIBLE);updateBarHandler.post(updateThread);}});}class buttonListener implements android.view.View.OnClickListener{private  int i=0;@Overridepublic void onClick(View v) {if(i==0){progress01.setVisibility(View.VISIBLE);progress02.setVisibility(View.VISIBLE);}else if(i<100){progress01.setProgress(i);progress01.setSecondaryProgress(i+10);}else{progress01.setVisibility(View.GONE);progress02.setVisibility(View.GONE);}i=i+10;}}Handler updateBarHandler=new Handler(){public void handleMessage(Message msg){       progress03.setProgress(msg.arg1);       updateBarHandler.post(updateThread);       }       };            Runnable updateThread=new Runnable(){int i=0;@Overridepublic void run() {i=i+10;Message msg=updateBarHandler.obtainMessage();msg.arg1=i;try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}updateBarHandler.sendMessage(msg);if(i==100){updateBarHandler.removeCallbacks(updateThread);System.exit(1);}}};}

4、运行效果：

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