Andriod版Demo增加前台服务，提升保活能力

demo_src/TCP_Client/MobileIMSDK4aDemo_tcp/app/build.gradle

@@ -7,7 +7,7 @@ android {
         minSdkVersion 14
         targetSdkVersion 29
         versionCode 104
-        versionName "v5.0b200917.1"
+        versionName "v5.0b201015.3"
         //testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

demo_src/TCP_Client/MobileIMSDK4aDemo_tcp/app/src/main/AndroidManifest.xml

@@ -5,6 +5,8 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+    <!-- Android 9.0中需要此权限的添加，不然崩溃 -->
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
     <application
         android:allowBackup="true"
@@ -13,7 +15,7 @@
         android:theme="@style/AppTheme"
         tools:ignore="GoogleAppIndexingWarning">
         <activity
-            android:name="net.x52im.mobileimsdk.android.demo.SplashScreenActivity"
+            android:name=".SplashScreenActivity"
             android:label="@string/app_name"
             android:screenOrientation="portrait"
             android:theme="@style/AppThemeBlackBar"
@@ -25,21 +27,24 @@
             </intent-filter>
         </activity>
         <activity
-            android:name="net.x52im.mobileimsdk.android.demo.LoginActivity"
+            android:name=".LoginActivity"
             android:configChanges="screenSize|keyboardHidden|orientation"
             android:screenOrientation="portrait"
             tools:ignore="LockedOrientationActivity"
             android:theme="@style/AppTheme"
             android:windowSoftInputMode="adjustUnspecified|stateHidden" >
         </activity>
         <activity
-            android:name="net.x52im.mobileimsdk.android.demo.MainActivity"
+            android:name=".MainActivity"
             android:configChanges="screenSize|keyboardHidden|orientation"
             android:screenOrientation="portrait"
             tools:ignore="LockedOrientationActivity"
             android:theme="@style/AppTheme"
             android:windowSoftInputMode="adjustUnspecified|stateHidden">
         </activity>
-    </application>
 
+        <!-- 一个为了Demo能更好保活的前台服务 -->
+        <service android:name=".service.GeniusService" />
+
+    </application>
 </manifest>

demo_src/TCP_Client/MobileIMSDK4aDemo_tcp/app/src/main/java/net/x52im/mobileimsdk/android/demo/LoginActivity.java

@@ -22,7 +22,6 @@
 import net.x52im.mobileimsdk.android.conf.ConfigEntity;
 import net.x52im.mobileimsdk.android.core.LocalDataSender;
 import net.x52im.mobileimsdk.android.core.LocalSocketProvider;
-import net.x52im.mobileimsdk.android.demo.R;
 
 import android.app.Activity;
 import android.app.AlertDialog;

demo_src/TCP_Client/MobileIMSDK4aDemo_tcp/app/src/main/java/net/x52im/mobileimsdk/android/demo/MainActivity.java

@@ -25,12 +25,16 @@
 
 import net.x52im.mobileimsdk.android.ClientCoreSDK;
 import net.x52im.mobileimsdk.android.core.LocalDataSender;
-import net.x52im.mobileimsdk.android.demo.R;
+import net.x52im.mobileimsdk.android.demo.service.GeniusService;
 
+import android.content.ComponentName;
 import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
 import android.graphics.Color;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.os.IBinder;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -77,6 +81,10 @@ protected void onCreate(Bundle savedInstanceState)
 		initViews();
 		initListeners();
 		initOthers();
+
+		// 启动前台服务（注意：该服务仅用于提升Demo的运行优先级，确保在高版本
+		// Andriod系统上进程保活和网络保活，此服务与SDK本身无关，也不是必须的）
+		doBindService();
 	}
 
 	/** 
@@ -87,19 +95,23 @@ public void onBackPressed()
 	{
 		super.onBackPressed();
 
-		// ** 注意：Android程序要么就别处理，要处理就一定
-		//			要退干净，否则会有意想不到的问题哦！
+		// ** 注意：Android程序要么就别处理，要处理就一定要退干净，否则会有意想不到的问题哦！
 		// 退出登陆
 		doLogout();
 		// 退出程序
 		doExit();
 	}
-
+
+	@Override
 	protected void onDestroy()
 	{
 		// 释放IM占用资源
 		IMClientManager.getInstance(this).release();
-		//
+
+		// 解绑前台服务（注意：该服务仅用于提升Demo的运行优先级，确保在高版本
+		// Andriod系统上进程保活和网络保活，此服务与SDK本身无关，也不是必须的）
+		doUnbindService();
+
 		super.onDestroy();
 	}
 
@@ -357,4 +369,44 @@ public enum ChatInfoColorType
     	green,
     }
 	//--------------------------------------------------------------- inner classes END
+
+	//--------------------------------------------------------------- 前台服务相关代码 START
+	/** 前台服务对象（绑定MobileIMSDK的Demo后，确保Demo能常驻内存，因为Andriod高版本对于进程保活、网络保活现在限制非常严格） */
+	private GeniusService boundService;
+
+	/** 绑定时需要使用的连接对象 */
+	private ServiceConnection serviceConnection = new ServiceConnection()
+	{
+		public void onServiceConnected(ComponentName className, IBinder service)
+		{
+			boundService = ((GeniusService.LocalBinder)service).getService();
+		}
+
+		public void onServiceDisconnected(ComponentName className)
+		{
+			boundService = null;
+		}
+	};
+
+	/**
+	 * 将本activity与后台服务绑定起来.
+	 */
+	protected void doBindService()
+	{
+		this.getApplicationContext().bindService(new Intent(this.getApplicationContext(), GeniusService.class), serviceConnection, Context.BIND_AUTO_CREATE);
+	}
+
+	/**
+	 * 解绑服务（服务将失去功能，随时会被系统回收）.
+	 */
+	protected void doUnbindService()
+	{
+		try{
+			this.getApplicationContext().unbindService(serviceConnection);
+		}
+		catch (Exception e){
+//			Log.w(TAG, e);
+		}
+	}
+	//--------------------------------------------------------------- 前台服务相关代码 END
 }

demo_src/TCP_Client/MobileIMSDK4aDemo_tcp/app/src/main/java/net/x52im/mobileimsdk/android/demo/SplashScreenActivity.java

@@ -28,8 +28,6 @@
 import android.view.animation.Animation;
 import android.view.animation.Animation.AnimationListener;
 
-import net.x52im.mobileimsdk.android.demo.R;
-
 /**
  * 应用程序启动类：显示闪屏界面并跳转到主界面.
  * 

demo_src/TCP_Client/MobileIMSDK4aDemo_tcp/app/src/main/java/net/x52im/mobileimsdk/android/demo/service/GeniusService.java

@@ -0,0 +1,153 @@
+package net.x52im.mobileimsdk.android.demo.service;
+
+import android.app.Application;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Color;
+import android.os.Binder;
+import android.os.IBinder;
+import android.util.Log;
+
+import net.x52im.mobileimsdk.android.demo.R;
+import net.x52im.mobileimsdk.android.demo.SplashScreenActivity;
+
+import androidx.core.app.NotificationCompat;
+
+/**
+ * 一个用于演示的前台服务实现类（本类代码，来自于RainbowChat产品：http://www.52im.net/thread-19-1-1.html）。
+ * <p>
+ * 目前的唯一作用是：作为前台服务，提升Demo的运行优先级，确保在高版本Andriod系统上进程保活和网络保活.
+ *
+ * 注意：该服务与MobileIMSDK本身无关，也不是必须的！
+ * 
+ * @author Jack Jiang(http://www.52im.net/space-uid-1.html)
+ * @version 1.0
+ */
+public class GeniusService extends Service
+{
+	final static String TAG = GeniusService.class.getSimpleName();
+
+	private NotificationManager mNM;
+
+	/**
+	 * Class for clients to access. Because we know this service always runs in
+	 * the same process as its clients, we don't need to deal with IPC.
+	 */
+	public class LocalBinder extends Binder
+	{
+		public GeniusService getService()
+		{
+			return GeniusService.this;
+		}
+	}
+
+	@Override
+	public void onCreate()
+	{
+		mNM = getNotificationManager(this);
+
+		// Display a notification about us starting. We put an icon in the status bar.
+		showNotification();
+	}
+
+	@Override
+	public void onDestroy()
+	{
+		//将service从前台移除，并允许随时被系统回收
+		this.stopForeground(true);
+		// Tell the user we stopped.
+		Log.d(TAG, "服务Destroy了哦！");
+	}
+
+	@Override
+	public IBinder onBind(Intent intent)
+	{
+		return mBinder;
+	}
+
+	// This is the object that receives interactions from clients. See RemoteService for a more complete example.
+	private final IBinder mBinder = new LocalBinder();
+
+	/**
+	 * Show a notification while this service is running.
+	 */
+	private void showNotification()
+	{
+		Application app = (Application)this.getApplicationContext();
+
+        Intent intent = new Intent(Intent.ACTION_MAIN);
+        intent.addCategory(Intent.CATEGORY_LAUNCHER);
+        intent.setClass(this, SplashScreenActivity.class);
+        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
+
+        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, 0);
+
+        String appName = this.getResources().getString(R.string.app_name);
+
+        // 创建一个Notification
+        Notification notification = createNotification(app , contentIntent, appName+" 正在运行中 ..."
+				, "点击回到 "+appName+" 的Demo", R.drawable.icon);
+
+		// 让service在前台执行
+		this.startForeground(999, notification);
+	}
+
+	public static NotificationManager getNotificationManager(Context context)
+	{
+		NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
+
+		// 以下代码，解决在Android 8及以上代码中，无法正常显示Notification或报"Bad notification for startForeground"等问题
+		NotificationChannel notificationChannel = null;
+		if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
+		{
+			notificationChannel = new NotificationChannel("default_1", "Default Channel", NotificationManager.IMPORTANCE_HIGH);
+			notificationChannel.enableLights(true);
+
+			notificationChannel.setLightColor(Color.RED);
+			notificationChannel.setShowBadge(true);
+			notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
+
+			manager.createNotificationChannel(notificationChannel);
+		}
+
+		return manager;
+	}
+
+	/**
+	 * 兼容地方法创建Notification方法。
+	 *
+	 * @param context
+	 * @param pendingIntent
+	 * @param title
+	 * @param text
+	 * @param iconId
+	 * @return
+	 */
+	public static Notification createNotification(Context context, PendingIntent pendingIntent, String title, String text, int iconId)
+	{
+		// 创建一个Notification Builder，使用NotificationCompat可以更好的兼容Android各系统版本，
+		// 有关Android Notitication的兼容性、详细设置等，参见：https://www.cnblogs.com/travellife/p/Android-Notification-xiang-jie.html
+		NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "default_1")
+				.setContentTitle(title)
+				.setContentText(text)
+				.setContentIntent(pendingIntent)
+				// 设置显示在手机最上边的状态栏的图标
+				.setSmallIcon(iconId);
+
+		// 通知的显示等级（Android5.0开始，通知可以显示在锁屏上）：
+		// - VISIBILITY_PRIVATE : 显示基本信息，如通知的图标，但隐藏通知的全部内容
+		// - VISIBILITY_PUBLIC : 显示通知的全部内容
+		// - VISIBILITY_SECRET : 不显示任何内容，包括图标
+		builder.setVisibility(NotificationCompat.VISIBILITY_PUBLIC);
+
+		// 创建一个Notification
+		Notification notification = builder.build();
+
+		return notification;
+	}
+}

demo_src/UDP_Client/MobileIMSDK4aDemo_udp/app/build.gradle

@@ -7,7 +7,7 @@ android {
         minSdkVersion 14
         targetSdkVersion 29
         versionCode 105
-        versionName "v5.0b200917.1"
+        versionName "v5.0b201015.1"
         //testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {

demo_src/UDP_Client/MobileIMSDK4aDemo_udp/app/src/main/AndroidManifest.xml

@@ -5,6 +5,8 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+    <!-- Android 9.0中需要此权限的添加，不然崩溃 -->
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
     <application
         android:allowBackup="true"
@@ -39,6 +41,9 @@
             android:windowSoftInputMode="adjustUnspecified|stateHidden"
             tools:ignore="LockedOrientationActivity">
         </activity>
-    </application>
 
+        <!-- 一个为了Demo能更好保活的前台服务 -->
+        <service android:name=".service.GeniusService" />
+
+    </application>
 </manifest>