自定义通知栏

摘自：http://blog.csdn.net/cstarbl/article/details/7200757

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main.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>

自定义通知栏的布局：notification.xml文件，一个TextView显示下载中，下面一根进度条显示当前进度

 

 

<?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>

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);
    }
}

效果图：