資料結構
網路
RDBMS
作業系統
Java
MS Excel
iOS
HTML
CSS
Android
Python
C語言程式設計
C++
C#
MongoDB
MySQL
Javascript
PHP
物理學
化學
生物學
數學
英語
經濟學
心理學
社會學
時尚研究
法律研究應用關閉後如何獲取Android通知？
此示例演示瞭如何在應用關閉後獲取Android通知。
步驟 1 − 在Android Studio中建立一個新專案，轉到檔案⇒新建專案，並填寫所有必需的詳細資訊以建立新專案。
步驟 2 − 將以下程式碼新增到res/layout/activity_main.xml中。
<? xml version = "1.0" encoding = "utf-8" ?> <RelativeLayout 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 :padding = "16dp" tools :context = ".MainActivity" > <Button android :layout_width = "match_parent" android :layout_height = "wrap_content" android :layout_centerInParent = "true" android :onClick = "closeApp" android :text = "close App for notification" /> </RelativeLayout>
步驟 3 − 將以下程式碼新增到src/MainActivity中。
package app.tutorialspoint.com.notifyme ;
import android.content.Intent ;
import android.os.Bundle ;
import android.support.v7.app.AppCompatActivity ;
import android.view.View ;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate (Bundle savedInstanceState) {
super .onCreate(savedInstanceState) ;
setContentView(R.layout. activity_main ) ;
}
@Override
protected void onStop () {
super .onStop() ;
startService( new Intent( this, NotificationService. class )) ;
}
public void closeApp (View view) {
finish() ;
}
}步驟 4 − 將以下程式碼新增到src/NotificationService中。
package app.tutorialspoint.com.notifyme ;
import android.app.NotificationChannel ;
import android.app.NotificationManager ;
import android.app.Service ;
import android.content.Intent ;
import android.os.Handler ;
import android.os.IBinder ;
import android.support.v4.app.NotificationCompat ;
import android.util.Log ;
import java.util.Timer ;
import java.util.TimerTask ;
public class NotificationService extends Service {
public static final String NOTIFICATION_CHANNEL_ID = "10001" ;
private final static String default_notification_channel_id = "default" ;
Timer timer ;
TimerTask timerTask ;
String TAG = "Timers" ;
int Your_X_SECS = 5 ;
@Override
public IBinder onBind (Intent arg0) {
return null;
}
@Override
public int onStartCommand (Intent intent , int flags , int startId) {
Log. e ( TAG , "onStartCommand" ) ;
super .onStartCommand(intent , flags , startId) ;
startTimer() ;
return START_STICKY ;
}
@Override
public void onCreate () {
Log. e ( TAG , "onCreate" ) ;
}
@Override
public void onDestroy () {
Log. e ( TAG , "onDestroy" ) ;
stopTimerTask() ;
super .onDestroy() ;
}
//we are going to use a handler to be able to run in our TimerTask
final Handler handler = new Handler() ;
public void startTimer () {
timer = new Timer() ;
initializeTimerTask() ;
timer .schedule( timerTask , 5000 , Your_X_SECS * 1000 ) ; //
}
public void stopTimerTask () {
if ( timer != null ) {
timer .cancel() ;
timer = null;
}
}
public void initializeTimerTask () {
timerTask = new TimerTask() {
public void run () {
handler .post( new Runnable() {
public void run () {
createNotification() ;
}
}) ;
}
} ;
}
private void createNotification () {
NotificationManager mNotificationManager = (NotificationManager) getSystemService( NOTIFICATION_SERVICE ) ;
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext() , default_notification_channel_id ) ;
mBuilder.setContentTitle( "My Notification" ) ;
mBuilder.setContentText( "Notification Listener Service Example" ) ;
mBuilder.setTicker( "Notification Listener Service Example" ) ;
mBuilder.setSmallIcon(R.drawable. ic_launcher_foreground ) ;
mBuilder.setAutoCancel( true ) ;
if (android.os.Build.VERSION. SDK_INT >= android.os.Build.VERSION_CODES. O ) {
int importance = NotificationManager. IMPORTANCE_HIGH ;
NotificationChannel notificationChannel = new NotificationChannel( NOTIFICATION_CHANNEL_ID , "NOTIFICATION_CHANNEL_NAME" , importance) ;
mBuilder.setChannelId( NOTIFICATION_CHANNEL_ID ) ;
assert mNotificationManager != null;
mNotificationManager.createNotificationChannel(notificationChannel) ;
}
assert mNotificationManager != null;
mNotificationManager.notify(( int ) System. currentTimeMillis () , mBuilder.build()) ;
}
}步驟 5 − 將以下程式碼新增到AndroidManifest.xml中。
<? xml version = "1.0" encoding = "utf-8" ?> <manifest xmlns: android = "http://schemas.android.com/apk/res/android" package = "app.tutorialspoint.com.notifyme" > <uses-permission android :name = "android.permission.VIBRATE" /> <application android :allowBackup = "true" android :icon = "@mipmap/ic_launcher" android :label = "@string/app_name" android :roundIcon = "@mipmap/ic_launcher_round" android :supportsRtl = "true" android :theme = "@style/AppTheme" > <activity android :name = ".MainActivity" > <intent-filter> <action android :name = "android.intent.action.MAIN" /> <category android :name = "android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android :name = ".NotificationService" android :label = "@string/app_name" > <intent-filter> <action android :name = "app.tutorialspoint.com.notifyme.NotificationService" /> <category android :name = "android.intent.category.DEFAULT" /> </intent-filter> </service> </application> </manifest>
讓我們嘗試執行您的應用程式。我假設您已將您的實際Android手機裝置連線到您的計算機。要從Android Studio執行應用程式，請開啟您的專案之一的活動檔案，然後單擊執行
工具欄中的圖示。選擇您的移動裝置作為選項，然後檢查您的移動裝置，它將顯示您的預設螢幕−
點選 這裡 下載專案程式碼
更新於: 2019年7月30日
510 次瀏覽
廣告