Android应用源码之(ProgressBar进度条).zip项目安卓应用源码下载

package com.progressbar; import android.app.Activity; import android.os.Bundle; import android.widget.ProgressBar; //使用Runnable接口 public class MainActivity extends Activity implements Runnable { private Thread th ; //声明一条线程 private ProgressBar pb ; //声明一个进度条对象 private boolean stateChage; //标识进度值最大最小的状态 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //实例进度条对象 pb = (ProgressBar)findViewById(R.id.porb); th = new Thread(this);//实例线程对象 th.start();//启动线程 } @Override public void run() {//实现Runnable接口抽象函数 while(true){ int current = pb.getProgress();//得到当前进度值 int currentMax = pb.getMax();//得到进度条的最大进度值 int secCurrent = pb.getSecondaryProgress();//得到底层当前进度值 //以下代码实现进度值越来越大，越来越小的一个动态效果 if(stateChage==false){ if(current>=currentMax){ stateChage=true; }else{ //设置进度值 pb.setProgress(current+1); //设置底层进度值 pb.setSecondaryProgress(current+1); } }else{ if(current<=0){ stateChage=false; }else{ pb.setProgress(current-1); pb.setSecondaryProgress(current-1); } } try { Thread.sleep(50); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }