在Android的Notification中显示进度条

http://vyphn.javaeye.com/blog/799126

 

最近研究了Notification,参考了一些文档，写了一些心得。在官方文档中得知在Android的Notification中可以显示进度条 ，就想做个例子试一下。在网上查了下，没有找到 
。决定自己写下，费了九牛二虎之力搞定了，现在拿出与大家分享下，废话少说，上代码：先自定义一个view 

Java代码 

<?xml version="1.0" encoding="utf-8"?>  

<LinearLayout           

xmlns:android="http://schemas.android.com/apk/res/android"      

              android:orientation="horizontal"      

              android:layout_width="fill_parent"      

              android:layout_height="fill_parent"      

              android:padding="10dp"  

              android:background="#880490FF"  

              >       

    <ImageView android:id="@+id/image"      

               android:layout_width="wrap_content"      

               android:layout_height="fill_parent"      

               />       

         <ProgressBar   

                                 android:id="@+id/pb"  

                                 android:layout_width="180dip"  

                android:layout_height="wrap_content"   

                style="?android:attr/progressBarStyleHorizontal"  

                android:layout_gravity="center_vertical"/>  

     <TextView  

                             android:id="@+id/tv"  

                             android:layout_width="wrap_content"      

                android:layout_height="fill_parent"   

                android:textSize="16px"  

                android:textColor="#FF0000"/>             

</LinearLayout>  

接着在Activity中写了逻辑代码： 

Java代码 

package com.jieer;  

import android.app.Activity;  

import android.app.Notification;  

import android.app.NotificationManager;  

import android.app.PendingIntent;  

import android.content.Intent;  

import android.os.Bundle;  

import android.os.Handler;  

import android.os.Message;  

import android.view.View;  

import android.widget.Button;  

import android.widget.RemoteViews;  

  

public class MainActivity extends Activity {  

  

        //当前进度条里的进度值  

        private int progress=0;  

        private RemoteViews view=null;  

        private Notification notification=new Notification();  

        private NotificationManager manager=null;  

        private Intent intent=null;  

        private PendingIntent pIntent=null;//更新显示  

        private Handler handler=new Handler(){  

                @Override  

                public void handleMessage(Message msg) {  

                        // TODO Auto-generated method stub  

                    view.setProgressBar(R.id.pb, 100, progress, false);  

                    view.setTextViewText(R.id.tv, "下载"+progress+"%");//关键部分，如果你不重新更新通知，进度条是不会更新的  

                    notification.contentView=view;  

                        notification.contentIntent=pIntent;  

                        manager.notify(0, notification);  

                        super.handleMessage(msg);  

                }  

              

    };  

    @Override  

    public void onCreate(Bundle savedInstanceState) {  

        super.onCreate(savedInstanceState);  

        setContentView(R.layout.main);  

        manager=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);  

        view=new RemoteViews(getPackageName(),R.layout.custom_dialog);  

                intent=new Intent(MainActivity.this,NotificationService.class);  

                pIntent=PendingIntent.getService(MainActivity.this, 0, intent, 0);  

        Button button=(Button)findViewById(R.id.bt);  

        button.setOnClickListener(new Button.OnClickListener(){  

  

                        @Override  

                        public void onClick(View v) {  

                                //通知的图标必须设置(其他属性为可选设置),否则通知无法显示  

                                notification.icon=R.drawable.icon;  

                                view.setImageViewResource(R.id.image, R.drawable.icon);//起一个线程用来更新progress  

                                new Thread(new Runnable(){  

                                        @Override  

                                        public void run() {  

                                         for(int i=0;i<20;i++){  

                                                progress=(i+1)*5;  

                                                try {  

                                                        if(i<19){  

                                                                Thread.sleep(1000);  

                                                        }else {  

                                                                Thread.currentThread().interrupt();  

                                                        }  

                                                } catch (InterruptedException e) {  

                                                        e.printStackTrace();  

                                                }  

                                                Message msg = new Message();  

                                                handler.sendMessage(msg);  

                                         }  

                                        }  

                                }).start();  

                        }  

                  

        });  

    }  

}