NotificationManager与Notification的应用

本博客内容选摘自《Google Android SDK 开发范例大全》第五章第8节（第170页），如需详细了解请查看原书籍

 

下面通过模拟MSN在线状态的切换，在切换状态时改变状态栏上的状态小图标和提示文本的示例来学习NotificationManager与Notification的应用。

代码如下：

 

StateBarNotifyActivity.java

package com.st;

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.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class StateBarNotifyActivity extends Activity {
	
	private NotificationManager nm = null;
	private Spinner spinner = null;
	private ArrayAdapter<String> adapter = null;
	
	private static final String ONLINE="在线";
	private static final String BUSY="忙碌";
	private static final String AWAY="离开";
	private static final String OFFLINE="离线";
	
	private static final String[]stateList = {ONLINE,BUSY,AWAY,OFFLINE};
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        
        spinner = (Spinner)findViewById(R.id.spinner);
        nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, stateList);
        spinner.setAdapter(adapter);
        
        spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {

			@Override
			public void onItemSelected(AdapterView<?> parent, View view,
					int position, long id) {
				// TODO Auto-generated method stub
				Log.i("OnItemSelectedListener", "position="+position+", id="+id);
				if(stateList[position].equals(ONLINE)){
					setNotifyType(R.drawable.online,ONLINE);
				}else if(stateList[position].equals(BUSY)){
					setNotifyType(R.drawable.busy,BUSY);
				}else if(stateList[position].equals(AWAY)){
					setNotifyType(R.drawable.away,AWAY);
				}else if(stateList[position].equals(OFFLINE)){
					setNotifyType(R.drawable.offline,OFFLINE);
				}
			}

			@Override
			public void onNothingSelected(AdapterView<?> parent) {
				// TODO Auto-generated method stub
				
			}

			
		});
        
    }

    /**
     * 发出通知
     * */
	protected void setNotifyType(int statePngId, String showText) {
		// TODO Auto-generated method stub
		
		Intent notifyIntent = new Intent(this,NotifyActivity.class);
		notifyIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		
		PendingIntent pintent = PendingIntent.getActivity(this, 0, notifyIntent, 0);
		
		Notification notification = new Notification();
		
		notification.icon = statePngId;//设置图标
		notification.tickerText = showText;//设置文本提示
		notification.defaults = Notification.DEFAULT_LIGHTS;//设置默认声音-Notification.DEFAULT_SOUND，还可以是其他的值：屏幕发亮-Notification.DEFAULT_LIGHTS；手机震动-Notification.DEFAULT_VIBRATE；包含以上三种动作-Notification.DEFAULT_ALL
		notification.setLatestEventInfo(this, "MSN登录状态", showText, pintent);
		
		//发出通知
		nm.notify(0, notification);
	}
}

 

 NotifyActivity.java

package com.st;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

public class NotifyActivity extends Activity {

	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		
		Toast.makeText(this, "这是模拟MSN登录状态的程序", Toast.LENGTH_LONG).show();
		finish();
	}
}

 

 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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
    
    <Spinner
    	android:id="@+id/spinner"
    	android:layout_width="fill_parent"
    	android:layout_height="wrap_content"
    	>
    </Spinner>
</LinearLayout>

 

 strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">模拟MSN切换登录状态的程序</string>
    <string name="app_name">StateBarNotify</string>
</resources>

 

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.st"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".StateBarNotifyActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <activity android:name=".NotifyActivity"></activity>

    </application>


</manifest>