【发布时间】：2023-03-02 23:24:02
【问题描述】：
我想创建一个始终在后台运行的 android 服务，即使我们没有打开像 gmail 服务或 whatsapp 服务这样的应用程序，这样我们就可以在应用程序关闭时收到通知（但不是强制关闭）。即使应用程序关闭，我也想获得 gcm 通知，就像我们从最近的应用程序中换出应用程序一样。
现在，当我通过长按主页按钮关闭应用程序并将其交换应用程序关闭 ao 的所有组件时，我无法收到 gcm 通知。
我知道当应用程序被强制关闭时我们无法收到 gcm 通知。
我在这个问题上纠结了很久。有人知道如何处理这个问题
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
ComponentName comp = new ComponentName(context.getPackageName(),
GCMNotificationIntentService.class.getName());
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="xxxx"
android:installLocation="internalOnly">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATUS_AND_IDENTITY" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.VIBRATE" />
<permission
android:name="xxxx.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="xxxx.permission.C2D_MESSAGE" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:name=".MyApplication"
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
//it overrides WakefulBroadcastReceiver
<receiver
android:name=".gcm.GcmBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name="xxxx" />
</intent-filter>
</receiver>
//it overrides IntentService
<service android:name=".gcm.GCMNotificationIntentService" />
</application>
</manifest>
public class GCMNotificationIntentService extends IntentService {
// Sets an ID for the notification, so it can be updated
public static final int notifyID = 9001;
private static final String TAG = GCMNotificationIntentService.class.getSimpleName();
NotificationCompat.Builder builder;
public GCMNotificationIntentService() {
super("GcmIntentService");
}
@Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
String messageType = gcm.getMessageType(intent);
if (!extras.isEmpty()) {
if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR
.equals(messageType)) {
sendNotification("Send error: " + extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED
.equals(messageType)) {
sendNotification("Deleted messages on server: "
+ extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE
.equals(messageType)) {
String incomingMessage = extras.get(ApplicationConstants.MSG_KEY)+"";
String type = identifyHeaders(incomingMessage);
String processedString = removeHeaders(incomingMessage, type);
if(type.equals(NOTIFICATION_MESSAGE)) {
sendNotification(processedString);
}else if(type.equals(NOTIFICATION_PHONE_CHANGE)){
}
}
}
GcmBroadcastReceiver.completeWakefulIntent(intent);
}
//this methos is for sending notification to notification bar
private void sendNotification(String msg) {
}
}
更新的 GCM 服务代码
public class GCMNotificationIntentService extends Service {
// Sets an ID for the notification, so it can be updated
public static final int notifyID = 9001;
private static final String TAG = GCMNotificationIntentService.class.getSimpleName();
public GCMNotificationIntentService() {
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(TAG, "Service started");
processIntent(intent);
return START_STICKY;
}
void processIntent(Intent intent){
Log.d(TAG, "notification received");
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
String messageType = gcm.getMessageType(intent);
if (!extras.isEmpty()) {
if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR
.equals(messageType)) {
sendNotification("Send error: " + extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED
.equals(messageType)) {
sendNotification("Deleted messages on server: "
+ extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE
.equals(messageType)) {
String incomingMessage = extras.get(ApplicationConstants.MSG_KEY)+"";
String type = identifyHeaders(incomingMessage);
String processedString = removeHeaders(incomingMessage, type);
if(type.equals(NOTIFICATION_MESSAGE)) {
sendNotification(processedString);
}else if(type.equals(NOTIFICATION_PHONE_CHANGE)){
updatePhoneNumber(processedString);
}
}
}
GcmBroadcastReceiver.completeWakefulIntent(intent);
}
private void sendNotification(String msg) {
Intent resultIntent = new Intent(this, WelcomeScreen.class);
resultIntent.putExtra("msg", msg);
resultIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP| Intent.FLAG_ACTIVITY_NEW_TASK| Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent resultPendingIntent = PendingIntent.getActivity(this, 0,
resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mNotifyBuilder;
NotificationManager mNotificationManager;
mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotifyBuilder = new NotificationCompat.Builder(this)
.setContentTitle("GOODSERVICE")
.setContentText("NEW LEAD FROM GOODSERVICE")
.setSmallIcon(R.drawable.ic_launcher);
mNotifyBuilder.setContentIntent(resultPendingIntent);
// Set Vibrate, Sound and Light
int defaults = 0;
defaults = defaults | Notification.DEFAULT_LIGHTS;
defaults = defaults | Notification.DEFAULT_VIBRATE;
mNotifyBuilder.setDefaults(defaults);
// Set the content for Notification
mNotifyBuilder.setContentText("NEW LEAD FROM GOODSERVICE");
// Set autocancel
mNotifyBuilder.setAutoCancel(true);
Uri soundTest = Settings.System.DEFAULT_RINGTONE_URI;
mNotifyBuilder.setSound(soundTest);
// Post a notification
mNotificationManager.notify(notifyID, mNotifyBuilder.build());
Intent intentone = new Intent(this, HomeActivity.class);
intentone.putExtra("msg", msg);
intentone.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP| Intent.FLAG_ACTIVITY_NEW_TASK| Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
this.startActivity(intentone);
}
}
这就是我调用此服务的方式
ComponentName comp = new ComponentName(context.getPackageName(),
GCMNotificationIntentService.class.getName());
startWakefulService(context, (intent.setComponent(comp)));
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
【问题讨论】：
-
您的服务已被破坏，因为您破坏了生成服务的进程（长按关闭）。我希望您的服务不绑定到您的 Activity，但由于您的进程已被终止，因此您的服务也是如此。理想情况下，Android 应该重新启动所有这些被破坏的服务，但它们将从头开始。
-
使用 START_STICKY developer.android.com/reference/android/app/… 或使用 startForeground(int,Notification) 但这会一直向用户显示通知，我认为这不是 gcm 的理想选择
-
我添加了一张图片，其中应用程序的服务始终在前台运行。你试过做这样的事情吗？我已经尝试过这些选项，但是当我长按关闭时服务正在停止
-
你知道gcm的任何方法吗？
-
进程死了 ---> 所有组件都死了（活动、服务等）。在你的 onStartCommand() 中返回 Service.START_STICKY，Android 会在进程被杀死时重启你的服务！
标签： android android-layout android-activity android-service