NotificationManager（三）

(2)、使用自訂的Notification
要建立一個自訂的Notification，可以使用RemoteViews。要定義自己的擴充訊息，首先要初始化一個RemoteViews對象，然後將它傳遞給Notification的contentView欄位，再把PendingIntent傳遞給contentIntent欄位。以下範例程式碼是完整步驟：

//1、建立一個自訂的訊息布局 view.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent" android:layout_height="fill_parent">

<ImageView android:id="@+id/image" android:layout_width="wrap_content"

android:layout_height="fill_parent" android:layout_marginRight="10dp" />

<TextView android:id="@+id/text" android:layout_width="wrap_content"

android:layout_height="fill_parent" android:textColor="#000" />

</LinearLayout>

//2、在程式碼中使用RemoteViews的方法來定義image和text。然後把RemoteViews對象傳到contentView欄位

RemoteViews contentView = new RemoteViews(getPackageName(),R.layout.view);

contentView.setImageViewResource(R.id.image,R.drawable.icon);

contentView.setTextViewText(R.id.text,”Hello,this message is in a custom expanded view”);

notification.contentView = contentView;

//3、為Notification的contentIntent欄位定義一個Intent(注意，使用自訂View不需要setLatestEventInfo()方法)

Intent notificationIntent = new Intent(this,Main.class);

PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0);

notification.contentIntent = contentIntent;

//4、發送通知

mNotificationManager.notify(2,notification);

//以下是全部範例程式碼

//建立一個NotificationManager的引用

String ns = Context.NOTIFICATION_SERVICE;

NotificationManager mNotificationManager = (NotificationManager)getSystemService(ns);

//定義Notification的各種屬性

int icon = R.drawable.icon; //通知表徵圖

CharSequence tickerText = "Hello"; //狀態列顯示的通知文本提示

long when = System.currentTimeMillis(); //通知產生的時間，會在通知資訊裡顯示

//用上面的屬性初始化Nofification

Notification notification = new Notification(icon,tickerText,when);

RemoteViews contentView = new RemoteViews(getPackageName(),R.layout.view);

contentView.setImageViewResource(R.id.image, R.drawable.iconempty);

contentView.setTextViewText(R.id.text, "Hello,this is JC");

notification.contentView = contentView;

Intent notificationIntent = new Intent(this,Main.class);

PendingIntent contentIntent = PendingIntent.getActivity(this,0,notificationIntent,0);

notification.contentIntent = contentIntent;

//把Notification傳遞給NotificationManager

mNotificationManager.notify(0,notification);