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法律研究如何在Android通知中啟動服務？
此示例演示瞭如何在Android通知中啟動服務。
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。
<? 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:onClick = "createNotification" android:text = "create notification" android:layout_centerInParent = "true" android:layout_width = "match_parent" android:layout_height = "wrap_content" /> </RelativeLayout>
步驟 3 - 將以下程式碼新增到src/MainActivity。
package app.tutorialspoint.com.notifyme ;
import android.app.AlarmManager ;
import android.app.PendingIntent ;
import android.content.Intent ;
import android.os.Bundle ;
import android.support.v7.app.AppCompatActivity ;
import android.view.View ;
import java.util.Calendar ;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate (Bundle savedInstanceState) {
super .onCreate(savedInstanceState) ;
setContentView(R.layout. activity_main ) ;
}
public void createNotification (View view) {
Intent myIntent = new Intent(getApplicationContext() , NotifyService. class ) ;
AlarmManager alarmManager = (AlarmManager) getSystemService( ALARM_SERVICE ) ;
PendingIntent pendingIntent = PendingIntent. getService ( this, 0 , myIntent , 0 ) ;
Calendar calendar = Calendar. getInstance () ;
calendar.set(Calendar. SECOND , 0 ) ;
calendar.set(Calendar. MINUTE , 0 ) ;
calendar.set(Calendar. HOUR , 0 ) ;
calendar.set(Calendar. AM_PM , Calendar. AM ) ;
calendar.add(Calendar. DAY_OF_MONTH , 1 ) ;
alarmManager.setRepeating(AlarmManager. RTC_WAKEUP , calendar.getTimeInMillis() ,
1000 * 60 * 60 * 24 , pendingIntent) ;
}
}步驟 4 - 將以下程式碼新增到src/NotifyService
package app.tutorialspoint.com.notifyme ;
import android.app.NotificationChannel ;
import android.app.NotificationManager ;
import android.app.PendingIntent ;
import android.app.Service ;
import android.content.Intent ;
import android.os.IBinder ;
import android.support.v4.app.NotificationCompat
public class NotifyService extends Service {
public static final String NOTIFICATION_CHANNEL_ID = "10001" ;
private final static String default_notification_channel_id = "default" ;
public NotifyService () {
}
@Override
public IBinder onBind (Intent intent) {
Intent notificationIntent = new Intent(getApplicationContext() ,
MainActivity. class ) ;
notificationIntent.putExtra( "fromNotification" , true ) ;
notificationIntent.setFlags(Intent. FLAG_ACTIVITY_CLEAR_TOP | Intent. FLAG_ACTIVITY_SINGLE_TOP ) ;
PendingIntent pendingIntent = PendingIntent. getActivity ( this, 0 , notificationIntent , 0 ) ;
NotificationManager mNotificationManager = (NotificationManager) getSystemService( NOTIFICATION_SERVICE ) ;
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext() , default_notification_channel_id ) ;
mBuilder.setContentTitle( "My Notification" ) ;
mBuilder.setContentIntent(pendingIntent) ;
mBuilder.setContentText( "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()) ;
throw new UnsupportedOperationException( "Not yet implemented" ) ;
}
}步驟 5 - 將以下程式碼新增到AndroidManifest.xml
<? xml version = "1.0" encoding= "utf-8" ?> <manifest xmlns: android = "http://schemas.android.com/apk/res/android" package= "app.tutorialspoint.com.notifyme" gt; <uses-permission android :name = "android.permission.VIBRATE" /> <uses-permission android :name= "android.permission.RECEIVE_BOOT_COMPLETED" /> <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" > <service android :name= ".NotifyService" android :enabled= "true" android :exported= "true" > </service> <activity android :name= ".MainActivity" > <intent-filter> <action android :name= "android.intent.action.MAIN" /> <category android :name= "android.intent.category.LAUNCHER" /> </intent-filter> </activity> </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電腦。要從Android Studio執行應用程式，請開啟您的專案中的一個活動檔案，然後單擊執行 
工具欄中的圖示。選擇您的手機裝置作為選項，然後檢查您的手機裝置，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
821 次檢視
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