Android学习之Notification的简单使用

这次来谈谈notification，notification一般用在电话，短信，邮件，闹钟铃声等，在手机的状态栏上就会出现一个小图标，提示用户处理这个快讯，这时手从上方滑动状态栏就可以展开并处理这个快讯。

废话不多说，上程序：

1 主界面布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".NotificationAct" >    <Button         android:id="@+id/btn_1"        android:layout_height="wrap_content"        android:layout_width="fill_parent"        android:text="较老方法"        />        <Button         android:id="@+id/btn_2"        android:layout_height="wrap_content"        android:layout_width="fill_parent"        android:text="官方推荐"        />        <Button         android:id="@+id/btn_3"        android:layout_height="wrap_content"        android:layout_width="fill_parent"        android:text="自定义"        /></LinearLayout>

效果图如下：

2 主程序代码

package com.example.notificationact;import android.os.Bundle;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.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.drawable.BitmapDrawable;import android.support.v4.app.NotificationCompat;import android.support.v4.app.TaskStackBuilder;import android.view.Menu;import android.view.View;import android.widget.Button;import android.widget.RemoteViews;public class NotificationAct extends Activity {private Button btn_1 = null;private Button btn_2 = null;private Button btn_3 = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.act_notification);buildBtn();}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.act_notification, menu);return true;}public void buildBtn() {btn_1 = (Button) findViewById(R.id.btn_1);btn_2 = (Button) findViewById(R.id.btn_2);btn_3 = (Button) findViewById(R.id.btn_3);btn_1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubshowNotification("今天下雪", "很大的雪", "不适合出行",R.drawable.ic_launcher, R.drawable.ic_launcher);}});btn_2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubshowNotificationByNotificationCompat();}});btn_3.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubshowMusicPlayerNotification("天天动听", R.drawable.appwidget_icon,R.drawable.appwidget_icon, R.drawable.appwidget_icon,"蝴蝶", "胡彦斌");}});}    /** * 较老的方法 * @param tickerText * @param contentTitle * @param contentText * @param id * @param resId */public void showNotification(String tickerText, String contentTitle,String contentText, int id, int resId) {NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);Notification notification = new Notification(resId, tickerText,System.currentTimeMillis());notification.defaults = Notification.DEFAULT_VIBRATE;// 使用默认的震动PendingIntent contentIntent = PendingIntent.getActivity(this, 0,getIntent(), 0);notification.setLatestEventInfo(this, contentTitle, contentText,contentIntent);notificationManager.notify(id, notification);}    /** * 使用官方推荐方法 */public void showNotificationByNotificationCompat() {Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.ic_launcher_mail);NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this).setLargeIcon(bitmap).setSmallIcon(R.drawable.ic_menu_compose_normal_holo_light).setContentTitle("您有5封邮件").setContentText("[e-mail]").setContentInfo("12").setWhen(System.currentTimeMillis()).setAutoCancel(false);// Creates an explicit intent for an Activity in your appIntent resultIntent = new Intent(this, NotificationAct.class);// The stack builder object will contain an artificial back stack for// the// started Activity.// This ensures that navigating backward from the Activity leads out of// your application to the Home screen.TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);// Adds the back stack for the Intent (but not the Intent itself)stackBuilder.addParentStack(NotificationAct.class);// Adds the Intent that starts the Activity to the top of the stackstackBuilder.addNextIntent(resultIntent);PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);mBuilder.setContentIntent(resultPendingIntent);NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);// mId allows you to update the notification later on.mNotificationManager.notify(1, mBuilder.build());}/** * 自定义的notification，仿天天动听 *  * @param tickerText * @param id * @param resId * @param photoId * @param songName * @param singerName */public void showMusicPlayerNotification(String tickerText, int id,int resId, int photoId, String songName, String singerName) {NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);Notification notification = new Notification(resId, tickerText,System.currentTimeMillis());PendingIntent contentIntent = PendingIntent.getActivity(this, 0,getIntent(), 0);// 自定义界面RemoteViews remoteView = new RemoteViews(getPackageName(),R.layout.notification);remoteView.setTextViewText(R.id.tv_song_name, songName);remoteView.setTextViewText(R.id.tv_singer_name, singerName);remoteView.setImageViewResource(R.id.iv_singer_photo,R.drawable.appwidget_icon);notification.contentView = remoteView;notificationManager.notify(id, notification);}}

其中第三个函数showMusicPlayerNotification()为自定义View的Notification，其XML布局文件如下

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="64dp" >    <ImageView        android:id="@+id/iv_singer_photo"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_vertical"        android:src="@drawable/appwidget_icon" />    <LinearLayout        android:id="@+id/ll_song_operation"        android:layout_width="96dp"        android:layout_height="fill_parent"        android:layout_alignParentRight="true"        android:layout_marginRight="5dp"        android:gravity="center"        android:orientation="horizontal" >        <Button            android:id="@+id/btn_previous"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:background="@drawable/nc_previoussong_pressed" />        <Button            android:id="@+id/btn_pause"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:background="@drawable/nc_pause_pressed" />        <Button            android:id="@+id/btn_next"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:background="@drawable/nc_nextsong_pressed" />    </LinearLayout>    <LinearLayout        android:id="@+id/ll_song_detail"        android:layout_width="wrap_content"        android:layout_height="fill_parent"        android:layout_marginLeft="5dp"        android:layout_toLeftOf="@id/ll_song_operation"        android:layout_toRightOf="@id/iv_singer_photo"        android:gravity="center_vertical"        android:orientation="vertical" >        <TextView            android:id="@+id/tv_song_name"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:singleLine="true"            android:ellipsize="end"            android:text="蝴蝶"            android:textColor="#000000"            android:textSize="18sp"            android:textStyle="bold" />        <TextView            android:id="@+id/tv_singer_name"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="胡彦斌"            android:textColor="#696969"            android:textSize="13sp" />    </LinearLayout></RelativeLayout>

最终运行程序，效果图如下：

3 结语

上面所述是使用notification的基本用法，其中showNotificationByNotificationCompat()函数中的setWhen()方法不起作用，我也不知道为啥，有知道的童鞋请不吝赐教。关于官方推荐的请参考developer.android.com-Notification

对于Notification的更高级的用法，等到仔细研究后再进行补充~