Android状态栏提醒(Notification,NotificationManager)的使用

Mexican 2010-07-20

大家好今天简单讲一下Android状态栏提醒,这个在开发中也会经常使用,当我们插上USB会有状态栏提醒,来短信时也会有状态栏的提醒。

而在Android中有提醒功能的也可以用AlertDialog,但是我们要审重的使用,因为当使用AlertDialog 的时候,用户正在进行的操作将会被打断

因为当前焦点被AlertDialog得到。我们可以想像一下,当用户打游戏正爽的时候,这时候来了一条短信。如果这时候短信用AlertDialog提醒,用户必须先去处理这条提醒,从而才能继续游戏。用户可能会活活被气死。而使用Notification就不会带来这些麻烦事,用户完全可以打完游戏再去看这条短信。所以在开发中应根据实际需求,选择合适的控件。

好了我今天又简单写了一个Demo, 教大家如何使用Notification,大致分以下几个步骤:

第一步:新建一个Android工程命名为NotificationDemo.

第二步:修改main.xml代码如下:

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<?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"  
    >   
<TextView     
    android:layout_width="fill_parent"    
    android:layout_height="wrap_content"    
    android:text="Welcome to Mr Wei's blog"  
    />   
<Button   
    android:id="@+id/showButton"  
    android:layout_width="fill_parent"    
    android:layout_height="wrap_content"  
    android:text="showNotification"  
/>   
<Button   
    android:id="@+id/cancelButton"  
    android:layout_width="fill_parent"    
    android:layout_height="wrap_content"  
    android:text="cancelNotification"  
/>   
</LinearLayout>  
<?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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Welcome to Mr Wei's blog"
    />
<Button
 android:id="@+id/showButton"
 android:layout_width="fill_parent" 
    android:layout_height="wrap_content"
    android:text="showNotification"
/>
<Button
 android:id="@+id/cancelButton"
 android:layout_width="fill_parent" 
    android:layout_height="wrap_content"
    android:text="cancelNotification"
/>
</LinearLayout>

第三步:修改NotificationDemo.java代码如下:

package com.tutor.notification;   
import android.app.Activity;   
import android.app.Notification;   
import android.app.NotificationManager;   
import android.app.PendingIntent;   
import android.content.Context;   
import android.content.Intent;   
import android.os.Bundle;   
import android.view.View;   
import android.view.View.OnClickListener;   
import android.widget.Button;   
public class NotificationDemo extends Activity implements OnClickListener{   
       
    private Context mContext;   
    private Button showButton,cancelButton;   
    private Notification mNotification;   
    private NotificationManager mNotificationManager;   
    private final static int NOTIFICATION_ID = 0x0001;   
       
    @Override  
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);   
        setContentView(R.layout.main);    
           
        setupViews();          
    }   
    //这里是初始化一些操作,可以看到onCreate()方法里代码非常简洁。   
    public void setupViews(){   
           mContext = NotificationDemo.this;   
           showButton = (Button)findViewById(R.id.showButton);   
           cancelButton = (Button)findViewById(R.id.cancelButton);   
              
           mNotification = new Notification(R.drawable.icon,"This is a notification.",System.currentTimeMillis());   
           //将使用默认的声音来提醒用户   
           mNotification.defaults = Notification.DEFAULT_SOUND;   
           mNotificationManager = (NotificationManager)this.getSystemService(NOTIFICATION_SERVICE);   
              
             
           showButton.setOnClickListener(this);   
           cancelButton.setOnClickListener(this);   
    }   
    //按钮点击事件响应   
    public void onClick(View v) {   
           
        if(v == showButton){   
            Intent mIntent = new Intent(mContext,NotificationDemo.class);   
            //这里需要设置Intent.FLAG_ACTIVITY_NEW_TASK属性   
            mIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);       
            PendingIntent mContentIntent =PendingIntent.getActivity(mContext,0, mIntent, 0);   
            //这里必需要用setLatestEventInfo(上下文,标题,内容,PendingIntent)不然会报错.   
            mNotification.setLatestEventInfo(mContext, "10086", "您的当前话费不足,请充值.哈哈~", mContentIntent);   
            //这里发送通知(消息ID,通知对象)   
            mNotificationManager.notify(NOTIFICATION_ID, mNotification);      
        }else if(v == cancelButton){   
            //取消只要把通知ID传过来就OK了.   
            mNotificationManager.cancel(NOTIFICATION_ID);   
        }   
    }   
}
package com.tutor.notification;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class NotificationDemo extends Activity implements OnClickListener{
    
 private Context mContext;
    private Button showButton,cancelButton;
    private Notification mNotification;
    private NotificationManager mNotificationManager;
    private final static int NOTIFICATION_ID = 0x0001;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main); 
        
        setupViews();       
    }
    //这里是初始化一些操作,可以看到onCreate()方法里代码非常简洁。
    public void setupViews(){
        mContext = NotificationDemo.this;
        showButton = (Button)findViewById(R.id.showButton);
        cancelButton = (Button)findViewById(R.id.cancelButton);
        
           mNotification = new Notification(R.drawable.icon,"This is a notification.",System.currentTimeMillis());
           //将使用默认的声音来提醒用户
           mNotification.defaults = Notification.DEFAULT_SOUND;
           mNotificationManager = (NotificationManager)this.getSystemService(NOTIFICATION_SERVICE);
           
          
           showButton.setOnClickListener(this);
           cancelButton.setOnClickListener(this);
    }
    //按钮点击事件响应
 public void onClick(View v) {
  
  if(v == showButton){
   Intent mIntent = new Intent(mContext,NotificationDemo.class);
   //这里需要设置Intent.FLAG_ACTIVITY_NEW_TASK属性
   mIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
   PendingIntent mContentIntent =PendingIntent.getActivity(mContext,0, mIntent, 0);
   //这里必需要用setLatestEventInfo(上下文,标题,内容,PendingIntent)不然会报错.
   mNotification.setLatestEventInfo(mContext, "10086", "您的当前话费不足,请充值.哈哈~", mContentIntent);
   //这里发送通知(消息ID,通知对象)
         mNotificationManager.notify(NOTIFICATION_ID, mNotification);   
  }else if(v == cancelButton){
   //取消只要把通知ID传过来就OK了.
   mNotificationManager.cancel(NOTIFICATION_ID);
  }
 }
}

本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/Android_Tutor/archive/2010/06/27/5696773.aspx

本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/Android_Tutor/archive/2010/06/27/5696773.aspx

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