這一章節,我們來學習Notification的應用,很多人問Notification是什麼東東啊?我打個比方吧,還是以西遊記來說:唐僧被妖怪們抓住瞭,那悟空得知道是哪個妖怪抓住瞭他師傅,他得變成一些動物(蒼蠅或蚊子)去通知他師傅啊,通知唐僧悟空來救他瞭,這裡通知就是Notification,那唐僧知道瞭,他就放心瞭,安心等著悟空來救.呵呵,讓我看一下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="match_parent"
android:layout_height="match_parent">
<Button android:text="通知師傅悟空來救他瞭" android:id="@+id/wukong"
android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<Button android:text="通知師傅八戒來救他瞭" android:id="@+id/bajie"
android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<Button android:text="通知師傅沙僧來救他瞭" android:id="@+id/shaseng"
android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<Button android:text="取消通知" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:id="@+id/notify_cancal"/>
</LinearLayout>
這裡面沒有什麼特別的,隻是定義瞭四個按鈕,然後主Activity.java
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.view.View;
import android.widget.Button;
public class NotificationDemo extends Activity
{
private final static int NOTIFYCATION_ID = 0x11;
@Override
protected void onCreate(Bundle savedInstanceState)
{
// TODO Auto-generated method stub www.aiwalls.com
super.onCreate(savedInstanceState);
setContentView(R.layout.notification);
//查找main.xml中的Button控件
Button wukong = (Button) findViewById(R.id.wukong);
wukong.setOnClickListener(new ClickEvent());
Button bajie = (Button) findViewById(R.id.bajie);
bajie.setOnClickListener(new ClickEvent());
Button shaseng = (Button) findViewById(R.id.shaseng);
shaseng.setOnClickListener(new ClickEvent());
Button notify_cancal = (Button)findViewById(R.id.notify_cancal);
notify_cancal.setOnClickListener(new ClickEvent());
}
class ClickEvent implements View.OnClickListener
{
@Override
public void onClick(View v)
{
//獲取系統的NotificationManager服務
NotificationManager notifyManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
//創建一個啟動其他Activity的Intent
Intent intent = new Intent(NotificationDemo.this,
otherActivity.class);
//設置點擊通知時顯示內容啟動的類
PendingIntent pi = PendingIntent.getActivity(NotificationDemo.this,
0, intent, 0);
//創建Notification對象
Notification notify = new Notification();
//設置Notification的發送時間
notify.when = System.currentTimeMillis();
//為Notification設置默認的聲音,默認的振動,默認的閃光燈,但這些需要在AndroidManifest.xml中加入相應的權限,不然會報錯
notify.defaults = Notification.DEFAULT_ALL;
switch (v.getId())
{
case R.id.wukong:
//設置Notification的圖標
notify.icon = R.drawable.wukong;
//設置Notification事件信息
notify.setLatestEventInfo(NotificationDemo.this, "悟空",
"悟空來救師傅的通知", pi);
//設置Notification的文本內容,會顯示在狀態欄中
notify.tickerText = "悟空來救師傅瞭";
//發送通知
notifyManager.notify(NOTIFYCATION_ID, notify);
break;
case R.id.bajie:
//同上
notify.icon = R.drawable.bajie;
notify.setLatestEventInfo(NotificationDemo.this, "八戒",
"八戒來救師傅的通知", pi);
notify.tickerText = "八戒來救師傅瞭";
notifyManager.notify(NOTIFYCATION_ID, notify);
break;
case R.id.shaseng:
//同上
notify.icon = R.drawable.shaseng;
notify.setLatestEventInfo(NotificationDemo.this, "沙僧",
"沙僧來救師傅的通知", pi);
notify.tickerText = "沙僧來救師傅瞭";
notifyManager.notify(NOTIFYCATION_ID, notify);
break;
case R.id.notify_cancal:
//取消通知
notifyManager.cancel(NOTIFYCATION_ID);
}
}
}
}
OK,我們在AndroidManifest.xml中加入相應的權限和要啟動的Activity
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.kang.button_demo"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.FLASHLIGHT"></uses-permission>
<uses-permission android:name="android.permission.VIBRATE"></uses-permission>
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:label="@string/app_name" android:name=".NotificationDemo">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".otherActivity"></activity>
</application>
</manifest>
好瞭,都寫完瞭,運行一下呢,如圖所示:
這裡的要點就是Notification和NotificationManager的創建,其實掌握Notification對於Android應用開發還是很有用的,好瞭,這一章就結束瞭,謝謝
摘自：kangkangz4的專欄