android 進度條組件ProgressBar

首先是main.xml文件

代碼如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent" >
  <ProgressBar
    android:id="@+id/myprobarA"
    
    android:visibility="gone"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
  <ProgressBar
    android:id="@+id/myprobarB"
    
    android:visibility="gone"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
  <ProgressBar
    android:id="@+id/myprobarC"
    
    android:visibility="gone"
    android:max="120"
    android:progress="0"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
  <ProgressBar
    android:id="@+id/myprobarD"
    android:visibility="gone"
    android:max="120"
    android:progress="50"
    android:secondaryProgress="70"
    
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
  <ProgressBar
    android:id="@+id/myprobarE"
    android:visibility="gone"
    android:max="120"
    android:progress="50"
    android:secondaryProgress="70"
    
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"/>
  <Button
    android:id="@+id/mybut"
    android:text="顯示進度條"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>
</LinearLayout>

　然後編寫Activity.java類

代碼如下：

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;
      }
    }
  };
}

運行效果：

以上就是對 Android 進度條的知識整理，後續繼續補充相關知識，謝謝大家對本站的支持！