如何在ui线程关闭后让Android应用程序推送通知(How to get Android Application to push notifications after ui thread is closed)

网站建设920 更新时间：2025-06-08 17:25:15

如何在手动关闭Android上的UI后获取推送通知？

嗨，我需要一些帮助，无法通过搜索找到任何解决方案。

应用程序基本上与任何其他消息传递应用程序一样 WhatsApp的。

我有MessageService 作为自己的进程运行，甚至UI关闭，它保持活着。

这是我的应用程序基本上如何工作：

MainActivity启动服务 MessageService发送broadCast messageReceiver获取广播并运行messageLoader MessagesLoader扩展AsyncTask从数据库中获取更改 MessagesLoader推送通知。

每个这些部件在UI运行时都能正常工作

当我关闭UI时，messageService会再次重新启动，但UI关闭后没有推送通知。

任何帮助以获得这项工作将不胜感激。

谢谢

这是一些代码片段，以了解我的东西如何工作..

MainActivity.java

........................... @Override protected void onResume() { super.onResume(); serviceIntent = new Intent(getApplicationContext(), MessageService.class); startService(serviceIntent); registerReceiver(messageReceiver, new IntentFilter(MessageService.MESSAGES_BROADCAST_ACTION)); } ...........................

MessageService.java

public class MessageService extends Service { Updater updater; BroadcastReceiver messageBroadcaster; Intent intent; Context context; static final public String MESSAGES_BROADCAST_ACTION = "com.<Your Package>"; public MessageService() { } @Override public IBinder onBind(Intent intent) { this.intent = intent; throw new UnsupportedOperationException("Not yet implemented"); } @Override public void onCreate() { super.onCreate(); this.updater = new Updater(); this.context = getApplicationContext(); this.intent = new Intent(this, NotificationActivity.class); Toast.makeText(this, "Message Service Created", Toast.LENGTH_LONG).show(); } @Override public synchronized int onStartCommand(Intent intent, int flags, int startId) { if (!updater.isRunning()) { updater.start(); updater.isRunning = true; } return super.onStartCommand(intent, flags, startId); } @Override public synchronized void onDestroy() { super.onDestroy(); if (updater.isRunning) { updater.interrupt(); updater.isRunning = false; updater = null; } Toast.makeText(this, "Message Service Destroyed", Toast.LENGTH_LONG).show(); } class Updater extends Thread { public boolean isRunning = false; public long DELAY = 2500; @Override public void run() { super.run(); isRunning = true; while (isRunning) { sendResult(); try { Thread.sleep(DELAY); } catch (InterruptedException e) { e.printStackTrace(); isRunning = false; } } } public boolean isRunning() { return this.isRunning; } } public void sendResult() { sendBroadcast(intent); } }

MessageReceiver.java

public class MessageReceiver extends BroadcastReceiver { public void onReceive(Context context, Intent intent) { Intent serviceIntent = new Intent(context, MessageService.class); context.startService(serviceIntent); new MessagesLoader(context).execute(); } }

MessageLoader.java

public class MessagesLoader extends AsyncTask<String,Void,String> { public MessagesLoader(Context context) { this.context = context; this.intent = new Intent(this.context, ChatsActivity.class); this.prev_count = prev_count; Intent intent = new Intent(context, ChatsActivity.class); PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent, 0); this.mBuilder = new android.support.v4.app.NotificationCompat.Builder(context) .setSmallIcon(R.mipmap.ic_launcher) .setContentTitle("YOUR APP"); } protected void onPreExecute(){ } @Override protected String doInBackground(String... arg0) { StringBuffer result = new StringBuffer(""); try { URL url = new URL("http://yourURL.com/get_data.php"); HttpURLConnection con = (HttpURLConnection)url.openConnection(); con.setRequestMethod("POST"); con.setRequestProperty("User-Agent", ""); con.setRequestProperty("Accept-Language", "en-US,en;q=0.5"); con.setDoOutput(true); String urlParameters = "<OWN PARAMETERS>"; DataOutputStream wr = new DataOutputStream(con.getOutputStream()); wr.writeBytes(urlParameters); wr.flush(); wr.close(); int responseCode = con.getResponseCode(); con.connect(); InputStream inputStream = con.getInputStream(); BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream)); String line = ""; while ((line = rd.readLine()) != null) { result.append(line); } return new String(result); } catch(Exception e){ return new String("Exception: " + e.getMessage()); } } @Override protected void onPostExecute(String result) { initData(result); } public void initData(String result) { // Actually Store Data to sharedPreferences String error = ""; JSONObject obj = new JSONObject(); // ...ETC int count = 5; showNotification(5); } public void showNotification(int count) { NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); Intent mIntent = new Intent(this.context, ChatsActivity.class); PendingIntent pIntent = PendingIntent.getActivity(this.context, 0, mIntent, 0); Intent cIntent = new Intent(this.context, NotificationActionService.class); PendingIntent cPIntent = PendingIntent.getService(this.context, 0, cIntent, 0); NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle(); bigTextStyle.bigText("YOUR BIG TEXT"); Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); mBuilder .setContentIntent(pIntent) .setContentText("YOUR CONTENT TEXT") .setAutoCancel(true) .setLights(R.color.white, 1000, 500) .setSound(soundUri) .setGroup("YOUR GROUP") .setTicker("YOUR TICKER TEXT") .setWhen(System.currentTimeMillis()) .setCategory("YOUR CATEGORY") .setStyle(bigTextStyle) .addAction(0, "Show Messages", pIntent); TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); stackBuilder.addParentStack(MainActivity.class); stackBuilder.addNextIntent(mIntent); PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT); mBuilder.setContentIntent(resultPendingIntent); } }

AndroidManifest.xml中

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.yourpackage" > android:versionCode="1" android:versionName="1.0" android:permission="android.permission.RECEIVE_BOOT_COMPLETED"> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> <uses-feature android:name="android.hardware.camera" android:required="true" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:configChanges="orientation" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.yourpackage.MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> </intent-filter> </activity> <service android:name="com.yourpackage.MessageService" android:process=":messageService" android:enabled="true" android:icon="@mipmap/ic_launcher" android:label="@string/messageService"> <intent-filter> <action android:name="com.yourpackage.MessageService" /> </intent-filter> </service> <receiver android:name="com.yourpackage.MessageReceiver"> <intent-filter> <action android:name="com.yourpackage.MessageReceiver" /> </intent-filter> </receiver> </application> </manifest>

How to get push notification working after manually closing UI on Android?

Hi, I need some help, Couldn't find any solutions by searching.

Application basically is like any other messaging applications, ex. Whatsapp.

I have MessageService running as own process, even UI closed, it stays alive.

This is how my application basically works:

MainActivity start service MessageService send broadCast to messageReceiver gets broadCast and run messageLoader MessagesLoader extends AsyncTask gets changes from database MessagesLoader push notification.

Every these parts working correctly when UI running

When I close UI, messageService restarts again, but no push notifications after UI closed.

Any help to get this work would be appreciated.

Thanks

Here is some code snippet to understand how my thing works..

MainActivity.java

........................... @Override protected void onResume() { super.onResume(); serviceIntent = new Intent(getApplicationContext(), MessageService.class); startService(serviceIntent); registerReceiver(messageReceiver, new IntentFilter(MessageService.MESSAGES_BROADCAST_ACTION)); } ...........................

MessageService.java

public class MessageService extends Service { Updater updater; BroadcastReceiver messageBroadcaster; Intent intent; Context context; static final public String MESSAGES_BROADCAST_ACTION = "com.<Your Package>"; public MessageService() { } @Override public IBinder onBind(Intent intent) { this.intent = intent; throw new UnsupportedOperationException("Not yet implemented"); } @Override public void onCreate() { super.onCreate(); this.updater = new Updater(); this.context = getApplicationContext(); this.intent = new Intent(this, NotificationActivity.class); Toast.makeText(this, "Message Service Created", Toast.LENGTH_LONG).show(); } @Override public synchronized int onStartCommand(Intent intent, int flags, int startId) { if (!updater.isRunning()) { updater.start(); updater.isRunning = true; } return super.onStartCommand(intent, flags, startId); } @Override public synchronized void onDestroy() { super.onDestroy(); if (updater.isRunning) { updater.interrupt(); updater.isRunning = false; updater = null; } Toast.makeText(this, "Message Service Destroyed", Toast.LENGTH_LONG).show(); } class Updater extends Thread { public boolean isRunning = false; public long DELAY = 2500; @Override public void run() { super.run(); isRunning = true; while (isRunning) { sendResult(); try { Thread.sleep(DELAY); } catch (InterruptedException e) { e.printStackTrace(); isRunning = false; } } } public boolean isRunning() { return this.isRunning; } } public void sendResult() { sendBroadcast(intent); } }

MessageReceiver.java

public class MessageReceiver extends BroadcastReceiver { public void onReceive(Context context, Intent intent) { Intent serviceIntent = new Intent(context, MessageService.class); context.startService(serviceIntent); new MessagesLoader(context).execute(); } }

MessageLoader.java

public class MessagesLoader extends AsyncTask<String,Void,String> { public MessagesLoader(Context context) { this.context = context; this.intent = new Intent(this.context, ChatsActivity.class); this.prev_count = prev_count; Intent intent = new Intent(context, ChatsActivity.class); PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent, 0); this.mBuilder = new android.support.v4.app.NotificationCompat.Builder(context) .setSmallIcon(R.mipmap.ic_launcher) .setContentTitle("YOUR APP"); } protected void onPreExecute(){ } @Override protected String doInBackground(String... arg0) { StringBuffer result = new StringBuffer(""); try { URL url = new URL("http://yourURL.com/get_data.php"); HttpURLConnection con = (HttpURLConnection)url.openConnection(); con.setRequestMethod("POST"); con.setRequestProperty("User-Agent", ""); con.setRequestProperty("Accept-Language", "en-US,en;q=0.5"); con.setDoOutput(true); String urlParameters = "<OWN PARAMETERS>"; DataOutputStream wr = new DataOutputStream(con.getOutputStream()); wr.writeBytes(urlParameters); wr.flush(); wr.close(); int responseCode = con.getResponseCode(); con.connect(); InputStream inputStream = con.getInputStream(); BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream)); String line = ""; while ((line = rd.readLine()) != null) { result.append(line); } return new String(result); } catch(Exception e){ return new String("Exception: " + e.getMessage()); } } @Override protected void onPostExecute(String result) { initData(result); } public void initData(String result) { // Actually Store Data to sharedPreferences String error = ""; JSONObject obj = new JSONObject(); // ...ETC int count = 5; showNotification(5); } public void showNotification(int count) { NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); Intent mIntent = new Intent(this.context, ChatsActivity.class); PendingIntent pIntent = PendingIntent.getActivity(this.context, 0, mIntent, 0); Intent cIntent = new Intent(this.context, NotificationActionService.class); PendingIntent cPIntent = PendingIntent.getService(this.context, 0, cIntent, 0); NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle(); bigTextStyle.bigText("YOUR BIG TEXT"); Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); mBuilder .setContentIntent(pIntent) .setContentText("YOUR CONTENT TEXT") .setAutoCancel(true) .setLights(R.color.white, 1000, 500) .setSound(soundUri) .setGroup("YOUR GROUP") .setTicker("YOUR TICKER TEXT") .setWhen(System.currentTimeMillis()) .setCategory("YOUR CATEGORY") .setStyle(bigTextStyle) .addAction(0, "Show Messages", pIntent); TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); stackBuilder.addParentStack(MainActivity.class); stackBuilder.addNextIntent(mIntent); PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT); mBuilder.setContentIntent(resultPendingIntent); } }

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.yourpackage" > android:versionCode="1" android:versionName="1.0" android:permission="android.permission.RECEIVE_BOOT_COMPLETED"> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> <uses-feature android:name="android.hardware.camera" android:required="true" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:configChanges="orientation" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.yourpackage.MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> </intent-filter> </activity> <service android:name="com.yourpackage.MessageService" android:process=":messageService" android:enabled="true" android:icon="@mipmap/ic_launcher" android:label="@string/messageService"> <intent-filter> <action android:name="com.yourpackage.MessageService" /> </intent-filter> </service> <receiver android:name="com.yourpackage.MessageReceiver"> <intent-filter> <action android:name="com.yourpackage.MessageReceiver" /> </intent-filter> </receiver> </application> </manifest>

最满意答案

我找到了解决方案。现在我的应用程序总是向我显示新的消息信息，即使没有UI运行。

这是修复此问题的解决方案。

MainActivity.java

@Override protected void onResume() { super.onresume(); serviceIntent = new Intent(getApplicationContext(), MessageService.class); startService(serviceIntent); /* COMMENTED OUT LINE BELOW */ //registerReceiver(messageReceiver, new IntentFilter(MessageService.MESSAGES_BROADCAST_ACTION)); }

MessageService.java

@Override public void onCreate() { super.onCreate(); updater = new Updater(); context = getApplicationContext(); /* AND ADDED THAT LINE HERE AND */ registerReceiver(messageReceiver, new IntentFilter(MESSAGES_BROADCAST_ACTION)); intent = new Intent(MESSAGES_BROADCAST_ACTION); Toast.makeText(this, "Message Service Created", Toast.LENGTH_LONG).show(); }

I've found the solution. Now my application is always showing me new messages info even without UI running.

Here is solution to fix this problem.

MainActivity.java

@Override protected void onResume() { super.onresume(); serviceIntent = new Intent(getApplicationContext(), MessageService.class); startService(serviceIntent); /* COMMENTED OUT LINE BELOW */ //registerReceiver(messageReceiver, new IntentFilter(MessageService.MESSAGES_BROADCAST_ACTION)); }

MessageService.java

@Override public void onCreate() { super.onCreate(); updater = new Updater(); context = getApplicationContext(); /* AND ADDED THAT LINE HERE AND */ registerReceiver(messageReceiver, new IntentFilter(MESSAGES_BROADCAST_ACTION)); intent = new Intent(MESSAGES_BROADCAST_ACTION); Toast.makeText(this, "Message Service Created", Toast.LENGTH_LONG).show(); }如何在ui线程关闭后让Android应用程序推送通知(How to get Android Application to push notifications after ui thread is closed)

如何在手动关闭Android上的UI后获取推送通知？

嗨，我需要一些帮助，无法通过搜索找到任何解决方案。

应用程序基本上与任何其他消息传递应用程序一样 WhatsApp的。

我有MessageService 作为自己的进程运行，甚至UI关闭，它保持活着。

这是我的应用程序基本上如何工作：

MainActivity启动服务 MessageService发送broadCast messageReceiver获取广播并运行messageLoader MessagesLoader扩展AsyncTask从数据库中获取更改 MessagesLoader推送通知。

每个这些部件在UI运行时都能正常工作

当我关闭UI时，messageService会再次重新启动，但UI关闭后没有推送通知。

任何帮助以获得这项工作将不胜感激。

谢谢

这是一些代码片段，以了解我的东西如何工作..

MainActivity.java

........................... @Override protected void onResume() { super.onResume(); serviceIntent = new Intent(getApplicationContext(), MessageService.class); startService(serviceIntent); registerReceiver(messageReceiver, new IntentFilter(MessageService.MESSAGES_BROADCAST_ACTION)); } ...........................

MessageService.java

public class MessageService extends Service { Updater updater; BroadcastReceiver messageBroadcaster; Intent intent; Context context; static final public String MESSAGES_BROADCAST_ACTION = "com.<Your Package>"; public MessageService() { } @Override public IBinder onBind(Intent intent) { this.intent = intent; throw new UnsupportedOperationException("Not yet implemented"); } @Override public void onCreate() { super.onCreate(); this.updater = new Updater(); this.context = getApplicationContext(); this.intent = new Intent(this, NotificationActivity.class); Toast.makeText(this, "Message Service Created", Toast.LENGTH_LONG).show(); } @Override public synchronized int onStartCommand(Intent intent, int flags, int startId) { if (!updater.isRunning()) { updater.start(); updater.isRunning = true; } return super.onStartCommand(intent, flags, startId); } @Override public synchronized void onDestroy() { super.onDestroy(); if (updater.isRunning) { updater.interrupt(); updater.isRunning = false; updater = null; } Toast.makeText(this, "Message Service Destroyed", Toast.LENGTH_LONG).show(); } class Updater extends Thread { public boolean isRunning = false; public long DELAY = 2500; @Override public void run() { super.run(); isRunning = true; while (isRunning) { sendResult(); try { Thread.sleep(DELAY); } catch (InterruptedException e) { e.printStackTrace(); isRunning = false; } } } public boolean isRunning() { return this.isRunning; } } public void sendResult() { sendBroadcast(intent); } }

MessageReceiver.java

public class MessageReceiver extends BroadcastReceiver { public void onReceive(Context context, Intent intent) { Intent serviceIntent = new Intent(context, MessageService.class); context.startService(serviceIntent); new MessagesLoader(context).execute(); } }

MessageLoader.java

public class MessagesLoader extends AsyncTask<String,Void,String> { public MessagesLoader(Context context) { this.context = context; this.intent = new Intent(this.context, ChatsActivity.class); this.prev_count = prev_count; Intent intent = new Intent(context, ChatsActivity.class); PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent, 0); this.mBuilder = new android.support.v4.app.NotificationCompat.Builder(context) .setSmallIcon(R.mipmap.ic_launcher) .setContentTitle("YOUR APP"); } protected void onPreExecute(){ } @Override protected String doInBackground(String... arg0) { StringBuffer result = new StringBuffer(""); try { URL url = new URL("http://yourURL.com/get_data.php"); HttpURLConnection con = (HttpURLConnection)url.openConnection(); con.setRequestMethod("POST"); con.setRequestProperty("User-Agent", ""); con.setRequestProperty("Accept-Language", "en-US,en;q=0.5"); con.setDoOutput(true); String urlParameters = "<OWN PARAMETERS>"; DataOutputStream wr = new DataOutputStream(con.getOutputStream()); wr.writeBytes(urlParameters); wr.flush(); wr.close(); int responseCode = con.getResponseCode(); con.connect(); InputStream inputStream = con.getInputStream(); BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream)); String line = ""; while ((line = rd.readLine()) != null) { result.append(line); } return new String(result); } catch(Exception e){ return new String("Exception: " + e.getMessage()); } } @Override protected void onPostExecute(String result) { initData(result); } public void initData(String result) { // Actually Store Data to sharedPreferences String error = ""; JSONObject obj = new JSONObject(); // ...ETC int count = 5; showNotification(5); } public void showNotification(int count) { NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); Intent mIntent = new Intent(this.context, ChatsActivity.class); PendingIntent pIntent = PendingIntent.getActivity(this.context, 0, mIntent, 0); Intent cIntent = new Intent(this.context, NotificationActionService.class); PendingIntent cPIntent = PendingIntent.getService(this.context, 0, cIntent, 0); NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle(); bigTextStyle.bigText("YOUR BIG TEXT"); Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); mBuilder .setContentIntent(pIntent) .setContentText("YOUR CONTENT TEXT") .setAutoCancel(true) .setLights(R.color.white, 1000, 500) .setSound(soundUri) .setGroup("YOUR GROUP") .setTicker("YOUR TICKER TEXT") .setWhen(System.currentTimeMillis()) .setCategory("YOUR CATEGORY") .setStyle(bigTextStyle) .addAction(0, "Show Messages", pIntent); TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); stackBuilder.addParentStack(MainActivity.class); stackBuilder.addNextIntent(mIntent); PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT); mBuilder.setContentIntent(resultPendingIntent); } }

AndroidManifest.xml中

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.yourpackage" > android:versionCode="1" android:versionName="1.0" android:permission="android.permission.RECEIVE_BOOT_COMPLETED"> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> <uses-feature android:name="android.hardware.camera" android:required="true" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:configChanges="orientation" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.yourpackage.MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> </intent-filter> </activity> <service android:name="com.yourpackage.MessageService" android:process=":messageService" android:enabled="true" android:icon="@mipmap/ic_launcher" android:label="@string/messageService"> <intent-filter> <action android:name="com.yourpackage.MessageService" /> </intent-filter> </service> <receiver android:name="com.yourpackage.MessageReceiver"> <intent-filter> <action android:name="com.yourpackage.MessageReceiver" /> </intent-filter> </receiver> </application> </manifest>

How to get push notification working after manually closing UI on Android?

Hi, I need some help, Couldn't find any solutions by searching.

Application basically is like any other messaging applications, ex. Whatsapp.

I have MessageService running as own process, even UI closed, it stays alive.

This is how my application basically works:

MainActivity start service MessageService send broadCast to messageReceiver gets broadCast and run messageLoader MessagesLoader extends AsyncTask gets changes from database MessagesLoader push notification.

Every these parts working correctly when UI running

When I close UI, messageService restarts again, but no push notifications after UI closed.

Any help to get this work would be appreciated.

Thanks

Here is some code snippet to understand how my thing works..

MainActivity.java

........................... @Override protected void onResume() { super.onResume(); serviceIntent = new Intent(getApplicationContext(), MessageService.class); startService(serviceIntent); registerReceiver(messageReceiver, new IntentFilter(MessageService.MESSAGES_BROADCAST_ACTION)); } ...........................

MessageService.java

public class MessageService extends Service { Updater updater; BroadcastReceiver messageBroadcaster; Intent intent; Context context; static final public String MESSAGES_BROADCAST_ACTION = "com.<Your Package>"; public MessageService() { } @Override public IBinder onBind(Intent intent) { this.intent = intent; throw new UnsupportedOperationException("Not yet implemented"); } @Override public void onCreate() { super.onCreate(); this.updater = new Updater(); this.context = getApplicationContext(); this.intent = new Intent(this, NotificationActivity.class); Toast.makeText(this, "Message Service Created", Toast.LENGTH_LONG).show(); } @Override public synchronized int onStartCommand(Intent intent, int flags, int startId) { if (!updater.isRunning()) { updater.start(); updater.isRunning = true; } return super.onStartCommand(intent, flags, startId); } @Override public synchronized void onDestroy() { super.onDestroy(); if (updater.isRunning) { updater.interrupt(); updater.isRunning = false; updater = null; } Toast.makeText(this, "Message Service Destroyed", Toast.LENGTH_LONG).show(); } class Updater extends Thread { public boolean isRunning = false; public long DELAY = 2500; @Override public void run() { super.run(); isRunning = true; while (isRunning) { sendResult(); try { Thread.sleep(DELAY); } catch (InterruptedException e) { e.printStackTrace(); isRunning = false; } } } public boolean isRunning() { return this.isRunning; } } public void sendResult() { sendBroadcast(intent); } }

MessageReceiver.java

public class MessageReceiver extends BroadcastReceiver { public void onReceive(Context context, Intent intent) { Intent serviceIntent = new Intent(context, MessageService.class); context.startService(serviceIntent); new MessagesLoader(context).execute(); } }

MessageLoader.java

public class MessagesLoader extends AsyncTask<String,Void,String> { public MessagesLoader(Context context) { this.context = context; this.intent = new Intent(this.context, ChatsActivity.class); this.prev_count = prev_count; Intent intent = new Intent(context, ChatsActivity.class); PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent, 0); this.mBuilder = new android.support.v4.app.NotificationCompat.Builder(context) .setSmallIcon(R.mipmap.ic_launcher) .setContentTitle("YOUR APP"); } protected void onPreExecute(){ } @Override protected String doInBackground(String... arg0) { StringBuffer result = new StringBuffer(""); try { URL url = new URL("http://yourURL.com/get_data.php"); HttpURLConnection con = (HttpURLConnection)url.openConnection(); con.setRequestMethod("POST"); con.setRequestProperty("User-Agent", ""); con.setRequestProperty("Accept-Language", "en-US,en;q=0.5"); con.setDoOutput(true); String urlParameters = "<OWN PARAMETERS>"; DataOutputStream wr = new DataOutputStream(con.getOutputStream()); wr.writeBytes(urlParameters); wr.flush(); wr.close(); int responseCode = con.getResponseCode(); con.connect(); InputStream inputStream = con.getInputStream(); BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream)); String line = ""; while ((line = rd.readLine()) != null) { result.append(line); } return new String(result); } catch(Exception e){ return new String("Exception: " + e.getMessage()); } } @Override protected void onPostExecute(String result) { initData(result); } public void initData(String result) { // Actually Store Data to sharedPreferences String error = ""; JSONObject obj = new JSONObject(); // ...ETC int count = 5; showNotification(5); } public void showNotification(int count) { NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); Intent mIntent = new Intent(this.context, ChatsActivity.class); PendingIntent pIntent = PendingIntent.getActivity(this.context, 0, mIntent, 0); Intent cIntent = new Intent(this.context, NotificationActionService.class); PendingIntent cPIntent = PendingIntent.getService(this.context, 0, cIntent, 0); NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle(); bigTextStyle.bigText("YOUR BIG TEXT"); Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); mBuilder .setContentIntent(pIntent) .setContentText("YOUR CONTENT TEXT") .setAutoCancel(true) .setLights(R.color.white, 1000, 500) .setSound(soundUri) .setGroup("YOUR GROUP") .setTicker("YOUR TICKER TEXT") .setWhen(System.currentTimeMillis()) .setCategory("YOUR CATEGORY") .setStyle(bigTextStyle) .addAction(0, "Show Messages", pIntent); TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); stackBuilder.addParentStack(MainActivity.class); stackBuilder.addNextIntent(mIntent); PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT); mBuilder.setContentIntent(resultPendingIntent); } }

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.yourpackage" > android:versionCode="1" android:versionName="1.0" android:permission="android.permission.RECEIVE_BOOT_COMPLETED"> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> <uses-feature android:name="android.hardware.camera" android:required="true" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:configChanges="orientation" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.yourpackage.MainActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> </intent-filter> </activity> <service android:name="com.yourpackage.MessageService" android:process=":messageService" android:enabled="true" android:icon="@mipmap/ic_launcher" android:label="@string/messageService"> <intent-filter> <action android:name="com.yourpackage.MessageService" /> </intent-filter> </service> <receiver android:name="com.yourpackage.MessageReceiver"> <intent-filter> <action android:name="com.yourpackage.MessageReceiver" /> </intent-filter> </receiver> </application> </manifest>

最满意答案

我找到了解决方案。现在我的应用程序总是向我显示新的消息信息，即使没有UI运行。

这是修复此问题的解决方案。

MainActivity.java

@Override protected void onResume() { super.onresume(); serviceIntent = new Intent(getApplicationContext(), MessageService.class); startService(serviceIntent); /* COMMENTED OUT LINE BELOW */ //registerReceiver(messageReceiver, new IntentFilter(MessageService.MESSAGES_BROADCAST_ACTION)); }

MessageService.java

@Override public void onCreate() { super.onCreate(); updater = new Updater(); context = getApplicationContext(); /* AND ADDED THAT LINE HERE AND */ registerReceiver(messageReceiver, new IntentFilter(MESSAGES_BROADCAST_ACTION)); intent = new Intent(MESSAGES_BROADCAST_ACTION); Toast.makeText(this, "Message Service Created", Toast.LENGTH_LONG).show(); }

I've found the solution. Now my application is always showing me new messages info even without UI running.

Here is solution to fix this problem.

MainActivity.java

@Override protected void onResume() { super.onresume(); serviceIntent = new Intent(getApplicationContext(), MessageService.class); startService(serviceIntent); /* COMMENTED OUT LINE BELOW */ //registerReceiver(messageReceiver, new IntentFilter(MessageService.MESSAGES_BROADCAST_ACTION)); }

MessageService.java

@Override public void onCreate() { super.onCreate(); updater = new Updater(); context = getApplicationContext(); /* AND ADDED THAT LINE HERE AND */ registerReceiver(messageReceiver, new IntentFilter(MESSAGES_BROADCAST_ACTION)); intent = new Intent(MESSAGES_BROADCAST_ACTION); Toast.makeText(this, "Message Service Created", Toast.LENGTH_LONG).show(); }

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如何在ui线程关闭后让Android应用程序推送通知(How to get Android Application to push notifications after ui thread is closed)

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如何在ui线程关闭后让Android应用程序推送通知(How to get Android Application to push notifications after ui thread is closed)

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