通知栏Notification使用自定义视图方法(显示一个进度条ProgressBar)

今天学习通知栏Notification使用自定义视图方法,这里以显示进度条ProgressBar为例,具体效果不上图了,请参考在Android Market下载软件时通知栏的效果。
布局XML:


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button android:id="@+id/bt1"
	android:layout_height="wrap_content"
	android:layout_width="fill_parent"
	android:text="Notification测试"
/>
<Button android:id="@+id/bt2"
	android:layout_height="wrap_content"
	android:layout_width="fill_parent"
	android:text="清除Notification"
/>
</LinearLayout>

跟前面学习notification的例子一样,没改一个字。
既然要使用自定义的布局,当然要自己写xml文件:


<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="vertical"
  >
 <TextView android:id="@+id/down_tv" 
               android:layout_width="wrap_content"    
               android:layout_height="fill_parent" 
               android:textSize="20sp" 
               android:textColor="#000000"
               android:text="下载中"
               />   
<ProgressBar android:id="@+id/pb" 
             android:layout_width="260dip" 
             android:layout_height="wrap_content" 
             style="?android:attr/progressBarStyleHorizontal"
             android:layout_gravity="center_vertical"/>          
</LinearLayout>

一个TextView显示下载中,下面一根进度条显示当前进度
程序代码:


package com.pocketdigi.Notification;

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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RemoteViews;

public class main extends Activity {
    /** Called when the activity is first created. */
	int notification_id=19172439;
	NotificationManager nm;
	Handler handler=new Handler();
	Notification notification;
	int count=0;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        Button bt1=(Button)findViewById(R.id.bt1);
        bt1.setOnClickListener(bt1lis);
        Button bt2=(Button)findViewById(R.id.bt2);
        bt2.setOnClickListener(bt2lis);
        //建立notification,前面有学习过,不解释了,不懂看搜索以前的文章
        nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
    	notification=new Notification(R.drawable.home,"图标边的文字",System.currentTimeMillis());
    	notification.contentView = new RemoteViews(getPackageName(),R.layout.notification); 
    	//使用notification.xml文件作VIEW
    	notification.contentView.setProgressBar(R.id.pb, 100,0, false);
    	//设置进度条,最大值 为100,当前值为0,最后一个参数为true时显示条纹
    	//(就是在Android Market下载软件,点击下载但还没获取到目标大小时的状态)
    	Intent notificationIntent = new Intent(this,main.class); 
    	PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0); 
    	notification.contentIntent = contentIntent;        
    }
    OnClickListener bt1lis=new OnClickListener(){

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			showNotification();//显示notification
			handler.post(run);
		}
    	
    };
    Runnable run=new Runnable(){

		@Override
		public void run() {
			// TODO Auto-generated method stub	
			count++;
			notification.contentView.setProgressBar(R.id.pb, 100,count, false);
			//设置当前值为count
			showNotification();//这里是更新notification,就是更新进度条
			if(count<100) handler.postDelayed(run, 200);
			//200毫秒count加1
		}
    	
    };
    OnClickListener bt2lis=new OnClickListener(){

		@Override
		public void onClick(View v) {
			nm.cancel(notification_id);
			//清除notification
		}
    	
    };
    public void showNotification(){
    	nm.notify(notification_id, notification);   	
    }
}

就这样。源代码下载:[download id="9"]

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