Android 如何判斷一個應用在運行
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Android 如何判斷一個應用在運行 在一個應用中，或一個Service 、Receiver中判斷一個應用是否正在運行，以便進行一些相關的處理。這個時候我們需要得到一個ActivityManager，這個Manager顧名思意就是管理Activity的，它有一個方法叫getRunningTasks，可以得到當前系統正在啟動並執行Task的列表，代碼如下： ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE); List<RunningTaskInfo> list = am.getRunningTasks(100); for (RunningTaskInfo info : list) { if (info.topActivity.getPackageName().equals(MY_PKG_NAME) && info.baseActivity.getPackageName().equals(MY_PKG_NAME)) { isAppRunning = true; //find it, break break; } }100表示取的最大的任務數，info.topActivity表示當前正在啟動並執行Activity，info.baseActivity表系統後台有此進程在運行，具體要做如何判斷就看自已的業務需求。這個類還有更多的方法可以取得系統啟動並執行服務、記憶體使用量情況等的方法，請各位自行尋找。有一點要注意，如果想正常運行此方法，請在你的 AndroidManifest.xml 中加入:<uses-permission android:name="android.permission.GET_TASKS" />否則可能會有exception拋出。=====================================//判斷應用是否在運行 ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);List<RunningTaskInfo> list = am.getRunningTasks(100);boolean isAppRunning = false;String MY_PKG_NAME = "com.cyberblue.iitag";for (RunningTaskInfo info : list) {if (info.topActivity.getPackageName().equals(MY_PKG_NAME) || info.baseActivity.getPackageName().equals(MY_PKG_NAME)) {isAppRunning = true;Log.i(TAG,info.topActivity.getPackageName() + " info.baseActivity.getPackageName()="+info.baseActivity.getPackageName());break;}}//運行中才去重啟藍芽，否則會導致安裝了這個應用後藍芽無法關閉if(isAppRunning){BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();if (!mBluetoothAdapter.isEnabled()) {// enable()開啟藍芽，這個方法開啟藍芽不會彈出提示mBluetoothAdapter.enable();}}================================================Android系統內部狀態資訊的相關api：得到ActivityManager ：ActivityManager activityManager = (ActivityManager)this.getSystemService(ACTIVITY_SERVICE)這個位查到底是什麼資訊： ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo(); 擷取進程記憶體狀態的資訊：Debug.MemoryInfo[] processMemoryInfo = activityManager.getProcessMemoryInfo(processIds); 擷取當前啟動並執行service資訊：List<RunningServiceInfo> runningServiceInfos = activityManager.getRunningServices(MaxValue); 擷取當前啟動並執行任務資訊：List<RunningTaskInfo> runningTaskInfos = activityManager.getRunningTasks(MaxValue);其中runningTaskInfos 的 topActivity就是當前Task的活躍Activity在getRunningTasks()所返回的Task隊列中系統會根據這些Task的活躍度有一個排序，越活躍越是靠前。第一個就是當前活動的Task/*** 檢測某ActivityUpdate是否在當前Task的棧頂*/public boolean isTopActivy(String cmdName){ ActivityManager manager = (ActivityManager) context.getSystemService(ACTIVITY_SERVICE); List<RunningTaskInfo> runningTaskInfos = manager.getRunningTasks(1); String cmpNameTemp = null; if(null != runningTaskInfos){ cmpNameTemp=(runningTaskInfos.get(0).topActivity).toString); Log.e("cmpname","cmpname:"+cmpName); } if(null == cmpNameTemp)return false; return cmpNameTemp.equals(cmdName);}最後在應用中添加所需的許可權：<uses-permission android:name="android.permission.GET_TASKS"/>[java] view plaincopy /**get the launcher status */ private boolean isLauncherRunnig(Context context) { boolean result = false ; List<String> names = getAllTheLauncher(); ActivityManager mActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE) ; List<ActivityManager.RunningAppProcessInfo> appList = mActivityManager.getRunningAppProcesses() ; for (RunningAppProcessInfo running : appList) { if (running.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) { for (int i = 0; i < names.size(); i++) { if (names.get(i).equals(running.processName)) { result = true ; break; } } } } return result ; } [java] view plaincopy private List<String> getAllTheLauncher(){ List<String> names = null; PackageManager pkgMgt = this.getPackageManager(); Intent it = new Intent(Intent.ACTION_MAIN); it.addCategory(Intent.CATEGORY_HOME); List<ResolveInfo> ra =pkgMgt.queryIntentActivities(it,0); if(ra.size() != 0){ names = new ArrayList<String>(); } for(int i=0;i< ra.size();i++) { String packageName = ra.get(i).activityInfo.packageName; names.add(packageName); } return names; } android 取當前顯示的activity是什麼ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);ComponentName cn = am.getRunningTasks(1).get(0).topActivity;Log.d("", "pkg:"+cn.getPackageName());Log.d("", "cls:"+cn.getClassName());android 如何判斷程式是否在前台運行[java] view plaincopy private boolean isTopActivity(){ List<RunningTaskInfo> tasksInfo = activityManager.getRunningTasks(1); if(tasksInfo.size() > 0){ //應用程式位於堆棧的頂層 if(packageName.equals(tasksInfo.get(0).topActivity.getPackageName())){ return true; } } return false; }
