android 进度条组件ProgressBar

首先是main.xml文件

代码如下：

　然后编写Activity.java类

代码如下：

package com.example.myfirstproject;
 
import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.*;
 
public class MainActivity extends Activity {
  private ProgressBar myprobarA,myprobarB,myprobarC,myprobarD,myprobarE;
  private Button mybut;
  protected static final int STOP = 1;
  protected static final int ConTINUE = 2;
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    this.myprobarA = (ProgressBar)this.findViewById(R.id.myprobarA);
    this.myprobarB = (ProgressBar)this.findViewById(R.id.myprobarB);
    this.myprobarC = (ProgressBar)this.findViewById(R.id.myprobarC);
    this.myprobarD = (ProgressBar)this.findViewById(R.id.myprobarD);
    this.myprobarE = (ProgressBar)this.findViewById(R.id.myprobarE);
    this.mybut = (Button)this.findViewById(R.id.mybut);
    this.myprobarA.setIndeterminate(false);
    this.myprobarB.setIndeterminate(false);
    this.myprobarC.setIndeterminate(true);
    this.myprobarD.setIndeterminate(false);
    this.myprobarE.setIndeterminate(false);
    this.mybut.setonClickListener(new onClickListenerlmpl());
  }  
  private class onClickListenerlmpl implements OnClickListener{
    public void onClick(View view){
      MainActivity.this.myprobarB.setSecondaryProgress(0);
      MainActivity.this.myprobarA.setVisibility(View.VISIBLE);
      MainActivity.this.myprobarB.setVisibility(View.VISIBLE);
      MainActivity.this.myprobarC.setVisibility(View.VISIBLE);
      MainActivity.this.myprobarD.setVisibility(View.VISIBLE);
      MainActivity.this.myprobarE.setVisibility(View.VISIBLE);
      MainActivity.this.myprobarA.setMax(120);
      MainActivity.this.myprobarB.setMax(120);
      MainActivity.this.myprobarA.setProgress(0);
      MainActivity.this.myprobarB.setProgress(0);
      new Thread(new Runnable(){
 public void run(){
   int count = 0;
   for(int i = 0;i < 10;i++){
     try{
count = (i+1)*20;
Thread.sleep(500);
if(i==6){
  Message m = new Message();
  m.what = MainActivity.STOP;
  MainActivity.this.myMessageHandler.sendMessage(m);
  break;
}else{
  Message m = new Message();
  m.arg1 = count;
  m.what = MainActivity.CONTINUE;
  MainActivity.this.myMessageHandler.sendMessage(m);
}
     }catch(Exception ex){
ex.printStackTrace();
     }
   }
 }
      }).start();
    }
  }
  private Handler myMessageHandler = new Handler(){
    public void handleMessage(Message msg){
      switch(msg.what){
      case MainActivity.STOP:
 myprobarA.setVisibility(View.GONE);
 myprobarB.setVisibility(View.GONE);
 myprobarC.setVisibility(View.GONE);
 myprobarD.setVisibility(View.GONE);
 myprobarE.setVisibility(View.GONE);
 Thread.currentThread().interrupt();
 break;
      case MainActivity.CONTINUE:
 if(!Thread.currentThread().isInterrupted()){
   myprobarA.setProgress(msg.arg1);
   myprobarB.setProgress(msg.arg1);
   myprobarC.setProgress(msg.arg1);
   myprobarD.setProgress(msg.arg1);
   myprobarE.setProgress(msg.arg1);
 }
 break;
      }
    }
  };
}

运行效果：

以上就是对 Android 进度条的知识整理，后续继续补充相关知识，谢谢大家对本站的支持！