Android 後臺Service : 向伺服器傳送心跳包
阿新 • • 發佈:2019-02-14
帶有心跳包的簡單Demo,包括伺服器
http://git.oschina.net/fengcunhan/SocketTest/blob/master/SocketTestService/src/com/mina/MinaServer.java?dir=0&filepath=SocketTestService%2Fsrc%2Fcom%2Fmina%2FMinaServer.java&oid=599789369632a6a2e8a31297c0cf10f85605a82c&sha=debc947b8ffa9433064384eacc01065b73aaa7b1
http://blog.csdn.net/dreamer0924/article/details/7705144
[java]
public class HeartbeatService extends Service implements Runnable { private Thread mThread; public int count = 0; private boolean isTip = true; private static String mRestMsg; private static String KEY_REST_MSG = "KEY_REST_MSG"; @Override public void run() { while (true) { try { if (count > 1) { Log.i("@qi", "offline"); count = 1; if (isTip) { //判斷應用是否在執行 ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); List<RunningTaskInfo> list = am.getRunningTasks(3); for (RunningTaskInfo info : list) { if (info.topActivity.getPackageName().equals("org.yhn.demo")) { //通知應用,顯示提示“連線不到伺服器” Intent intent = new Intent("org.yhn.demo"); intent.putExtra("msg", true); sendBroadcast(intent); break; } } isTip = false; } } if (mRestMsg != "" && mRestMsg != null) { //向伺服器傳送心跳包 sendHeartbeatPackage(mRestMsg); count += 1; } Thread.sleep(1000 * 3); } catch (InterruptedException e) { e.printStackTrace(); } } } private void sendHeartbeatPackage(String msg) { HttpGet httpGet = new HttpGet(msg); DefaultHttpClient httpClient = new DefaultHttpClient(); // 傳送請求 HttpResponse httpResponse = null; try { httpResponse = httpClient.execute(httpGet); } catch (Exception e) { e.printStackTrace(); } if (httpResponse == null) { return; } // 處理返回結果 final int responseCode = httpResponse.getStatusLine().getStatusCode(); if (responseCode == HttpStatus.SC_OK) { //只要伺服器有迴應就OK count = 0; isTip = true; } else { Log.i("@qi", "responseCode " + responseCode); } } @Override public IBinder onBind(Intent intent) { return null; } @Override public void onCreate() { super.onCreate(); } @Override public void onDestroy() { super.onDestroy(); } public void onStart(Intent intent, int startId) { Log.i("@qi", "service onStart"); //從本地讀取伺服器的URL,如果沒有就用傳進來的URL mRestMsg = getRestMsg(); if (mRestMsg == null || mRestMsg == "") { mRestMsg = intent.getExtras().getString("url"); } setRestMsg(mRestMsg); mThread = new Thread(this); mThread.start(); count = 0; super.onStart(intent, startId); } public String getRestMsg() { SharedPreferences prefer = getSharedPreferences("settings.data", Context.MODE_PRIVATE); Log.i("@qi", "getRestMsg() " + prefer.getString(KEY_REST_MSG, "")); return prefer.getString(KEY_REST_MSG, ""); } public void setRestMsg(String restMsg) { SharedPreferences prefer = getSharedPreferences("settings.data", Context.MODE_PRIVATE); SharedPreferences.Editor editor = prefer.edit(); editor.putString(KEY_REST_MSG, restMsg); editor.commit(); } } public class HeartbeatService extends Service implements Runnable { private ThreadmThread; public intcount= 0; private booleanisTip= true; private static StringmRestMsg; private static StringKEY_REST_MSG= "KEY_REST_MSG"; @Override public void run() { while (true) { try { if (count > 1) { Log.i("@qi", "offline"); count = 1; if (isTip) { //判斷應用是否在執行 ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); List<RunningTaskInfo> list = am.getRunningTasks(3); for (RunningTaskInfo info : list) { if (info.topActivity.getPackageName().equals("org.yhn.demo")) { //通知應用,顯示提示“連線不到伺服器” Intent intent = new Intent("org.yhn.demo"); intent.putExtra("msg", true); sendBroadcast(intent); break; } } isTip = false; } } if (mRestMsg != "" && mRestMsg != null) { //向伺服器傳送心跳包 sendHeartbeatPackage(mRestMsg); count += 1; } Thread.sleep(1000 * 3); } catch (InterruptedException e) { e.printStackTrace(); } } } private void sendHeartbeatPackage(String msg) { HttpGet httpGet = new HttpGet(msg); DefaultHttpClient httpClient = new DefaultHttpClient(); // 傳送請求 HttpResponse httpResponse = null; try { httpResponse = httpClient.execute(httpGet); } catch (Exception e) { e.printStackTrace(); } if (httpResponse == null) { return; } // 處理返回結果 final int responseCode = httpResponse.getStatusLine().getStatusCode(); if (responseCode == HttpStatus.SC_OK) { //只要伺服器有迴應就OK count = 0; isTip = true; } else { Log.i("@qi", "responseCode " + responseCode); } } @Override public IBinder onBind(Intent intent) { return null; } @Override public void onCreate() { super.onCreate(); } @Override public void onDestroy() { super.onDestroy(); } public void onStart(Intent intent, int startId) { Log.i("@qi", "service onStart"); //從本地讀取伺服器的URL,如果沒有就用傳進來的URL mRestMsg = getRestMsg(); if (mRestMsg == null || mRestMsg == "") { mRestMsg = intent.getExtras().getString("url"); } setRestMsg(mRestMsg); mThread = new Thread(this); mThread.start(); count = 0; super.onStart(intent, startId); } public String getRestMsg() { SharedPreferences prefer = getSharedPreferences("settings.data", Context.MODE_PRIVATE); Log.i("@qi", "getRestMsg() " + prefer.getString(KEY_REST_MSG, "")); return prefer.getString(KEY_REST_MSG, ""); } public void setRestMsg(String restMsg) { SharedPreferences prefer = getSharedPreferences("settings.data", Context.MODE_PRIVATE); SharedPreferences.Editor editor = prefer.edit(); editor.putString(KEY_REST_MSG, restMsg); editor.commit(); } } 啟動Service: [java] Intent serviceIntent = new Intent("HeartbeatService"); serviceIntent.putExtra("url",url); startService(serviceIntent); Intent serviceIntent = new Intent("HeartbeatService"); serviceIntent.putExtra("url",url); startService(serviceIntent); 最後別忘了註冊Server和GET_TASKS [html] <service android:name=".demo.HeartbeatService" android:label="QServer" android:persistent="true" > <intent-filter> <action android:name="HeartbeatService" /> </intent-filter> </service> <service android:name=".demo.HeartbeatService" android:label="QServer" android:persistent="true" > <intent-filter> <action android:name="HeartbeatService" /> </intent-filter> </service>[html] view plaincopyprint? <uses-permission android:name="android.permission.GET_TASKS" /> <uses-permission android:name="android.permission.GET_TASKS" /> 執行效果: