假设我正在创建一个类似于SMS应用程序的Android应用程序。要求如下:
我对如何处理这个问题的想法是使用putExtra将整数ID添加到intent中,然后可以从它加载的活动中的intent中访问它,然后它会关闭调用它的通知。
对于我的测试用例,以下是规格:
以下是我的问题:
这是我的来源:
<?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/create_notification"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:text = "Create new notification"
/>
package org.test.notifydemo;
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.widget.Button;
import android.widget.Toast;
import java.util.Random;
public class aRunNotificationDemo extends Activity
{
private NotificationManager mNotificationManager;
@Override
public void onCreate( Bundle icicle )
{
super.onCreate( icicle );
setContentView( R.layout.run_notify_demo );
mNotificationManager = (NotificationManager) getSystemService( aRunNotificationDemo.NOTIFICATION_SERVICE );
int close_notify_id = getIntent().getIntExtra( "notification_id", 0 );
if ( close_notify_id != 0 )
{
Toast.makeText( aRunNotificationDemo.this, "Dimissing this notification: " + Integer.toString(close_notify_id), Toast.LENGTH_SHORT ).show();
mNotificationManager.cancel( close_notify_id );
}
findViewById( R.id.create_notification ).setOnClickListener( new MyButtonListener() );
}
private class MyButtonListener implements Button.OnClickListener
{
public void onClick( View my_view )
{
Random randGen = new Random();
int notify_id = randGen.nextInt();
int icon = R.drawable.icon_notification_01;
CharSequence tickerText = Integer.toString(notify_id) + " New SMS!";
long when = System.currentTimeMillis();
Notification my_notification = new Notification(icon, tickerText, when);
Context context = getApplicationContext();
CharSequence contentTitle = Integer.toString(notify_id) + " New SMS Available!";
CharSequence contentText = Integer.toString(notify_id) + " There is a new SMS available.";
Intent notificationIntent = new Intent( aRunNotificationDemo.this, aRunNotificationDemo.class );
notificationIntent.putExtra( "notification_id", notify_id );
PendingIntent contentIntent = PendingIntent.getActivity( aRunNotificationDemo.this, 0, notificationIntent, 0 );
my_notification.setLatestEventInfo( context, contentTitle, contentText, contentIntent );
mNotificationManager.notify( notify_id, my_notification );
}
}
}
答案 0 :(得分:16)
一旦创建活动,就会调用其onCreate()
方法。下次显示时,不一定要调用该方法。尝试将删除通知的代码移动到onResume()
方法。熟悉活动生命周期。
顺便说一句,它比你想象的容易:
http://developer.android.com/reference/android/app/Notification.html#FLAG_AUTO_CANCEL
my_notification.flags |= Notification.FLAG_AUTO_CANCEL;
创建Notification
时将代码放在上面。