Android进度条控件progressbar使用方法详解

<progressbar 
style="?android:attr/progressbarstylehorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:progress="30"
/>

private progressbar pb_progressbar1;
pb_progressbar1=(progressbar) findviewbyid(r.id.pb_progressbar1);

if(progress<=100){
　　progress=pb_progressbar1.getprogress();
　　progress+=(int)(100*0.2);
　　pb_progressbar1.setprogress(progress);
}else progress=100;

package fry;

import com.example.ex26progressbar.r;

import android.app.activity;
import android.os.bundle;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;
import android.widget.progressbar;

public class activity01 extends activity implements onclicklistener{
  /*
   * 进度条progressbar使用方法
   * 1、在layout布局文件中创建progressbar控件
   * 2、用progressbar对象指向progressbar控件
   * 3、通过progressbar对象的getprogress()和setprogress()方法对进度进行修改
   * 
   */
  private button btn_addprogress;
  private button btn_minusprogress;
  private progressbar pb_progressbar1;
  private int progress;
  @override
  protected void oncreate(bundle savedinstancestate) {
    
    // todo auto-generated method stub
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity01);
    
    btn_addprogress=(button) findviewbyid(r.id.btn_addprogress);
    btn_minusprogress=(button) findviewbyid(r.id.btn_minusprogress);
    pb_progressbar1=(progressbar) findviewbyid(r.id.pb_progressbar1);
    
    btn_addprogress.setonclicklistener(this);
    btn_minusprogress.setonclicklistener(this);
    
  }
  @override
  public void onclick(view v) {
    // todo auto-generated method stub
    switch (v.getid()) {
    case r.id.btn_addprogress:
      if(progress<=100){
        progress=pb_progressbar1.getprogress();
        progress+=(int)(100*0.2);
        pb_progressbar1.setprogress(progress);
      }else progress=100;
      
      break;
    case r.id.btn_minusprogress:
      if(progress>=0){
        progress=pb_progressbar1.getprogress();
        progress-=(int)(100*0.2);
        pb_progressbar1.setprogress(progress);
      }else progress=0;
      break;

    default:
      break;
    }
  }
}

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical" >

  <!-- style设置控件样式 -->
  <!-- 用？来引用东西 -->
  <progressbar 
    style="?android:attr/progressbarstylesmall"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
  
  <progressbar 
    style="?android:attr/progressbarstylelarge"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
  
  
  <progressbar 
    style="?android:attr/progressbarstylelargeinverse"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
  
  <progressbar 
    style="?android:attr/progressbarstylehorizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:progress="30"
    />
  
  <progressbar 
    android:id="@+id/pb_progressbar1"
    style="?android:attr/progressbarstylehorizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:progress="50"
    android:secondaryprogress="80"
    android:layout_margintop="30dp"
    />
  
  <linearlayout 
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="horizontal"
    >
    <button 
    android:id="@+id/btn_addprogress"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="增加进度"
    android:layout_weight="1"
    />
  
  <button 
    android:id="@+id/btn_minusprogress"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="减少进度"
    android:layout_weight="1"
    />
    
  </linearlayout>
  

</linearlayout>

progress=pb_progressbar1.getprogress();
progress+=(int)(100*0.2);
pb_progressbar1.setprogress(progress);