Android中ProgressBar用法简单实例

本文实例讲述了android中progressbar用法。分享给大家供大家参考，具体如下：

在android中会经常用到progressbar,下面通过举例来说明如何使用progressbar。

import android.app.activity;
import android.os.bundle;
import android.os.handler;
import android.os.message;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;
import android.widget.progressbar;
public class a03activity extends activity {
 private progressbar rectangle,circle;
 private button showprogressbar;
 private final static int stop=0x10000;
 private final static int next=0x10001;
 private int count=0;
  /** called when the activity is first created. */
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    rectangle=(progressbar)findviewbyid(r.id.rectangle);
    circle=(progressbar)findviewbyid(r.id.circle);
    showprogressbar=(button)findviewbyid(r.id.showprogressbar);
    rectangle.setindeterminate(false);
    circle.setindeterminate(false);
    showprogressbar.setonclicklistener(new onclicklistener(){
  @override
  public void onclick(view v) {
  // todo auto-generated method stub
  rectangle.setvisibility(view.visible);
  circle.setvisibility(view.visible);
  rectangle.setmax(100);
  rectangle.setprogress(0);
  circle.setprogress(0);
  thread t=new thread(new runnable(){
   @override
   public void run() {
   // todo auto-generated method stub
   for(int i=0;i<20;i++){
    try {
    count=(i+1)*5;
    thread.sleep(1000);
    if(count==19){
     message msg=new message();
     msg.what=stop;
     handler.sendmessage(msg);
     break;
    }
    else{
     message msg=new message();
     msg.what=next;
     handler.sendmessage(msg);
    }
    } catch (interruptedexception e) {
    // todo auto-generated catch block
    e.printstacktrace();
    }
   }
   }   
  });
  t.start();
  }
  });
  }
  private handler handler=new handler(){
   @suppresswarnings("static-access")
 public void handlemessage(message msg){
   switch(msg.what){
   case stop:
    rectangle.setvisibility(view.gone);
    circle.setvisibility(view.gone);
    thread.currentthread().interrupt();
    break;
   case next:
    if(!thread.currentthread().interrupted()){
    rectangle.setprogress(count);
    circle.setprogress(count);
    }
    break;
   }
   }
  };
}

res/layout/main.xml如下所示：

<?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" >
  <textview
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello" />
  <progressbar 
    android:id="@+id/rectangle"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    style="?android:attr/progressbarstylehorizontal"
    mce_style="?android:attr/progressbarstylehorizontal"
    android:visibility="gone"
    />
  <progressbar 
    android:id="@+id/circle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    style="?android:attr/progressbarstylelarge"
    mce_style="?android:attr/progressbarstylelarge"
    android:visibility="gone"    
    />
  <button 
    android:id="@+id/showprogressbar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="show progressbar"
    />
</linearlayout>

更多关于android控件相关内容感兴趣的读者可查看本站专题：《android控件用法总结》

希望本文所述对大家android程序设计有所帮助。