android

• 判断应用是否在前台 使用activityManager与当前页面线程对比
  • Code:

    /** 
    * 需要权限:android.permission.GET_TASKS 
    * 
    * @param context 
    * @return 
    */
    public boolean isApplicationBroughtToBackground(Context context) 
    { 
     ActivityManager am = (ActivityManager) context 
           .getSystemService(Context.ACTIVITY_SERVICE); 
     List<RunningTaskInfo> tasks = am.getRunningTasks(1); 
     if (tasks != null && !tasks.isEmpty()) 
     { 
       ComponentName topActivity = tasks.get(0).topActivity; 
       Debug.i(TAG, "topActivity:" + topActivity.flattenToString()); 
       Debug.f(TAG, "topActivity:" + topActivity.flattenToString()); 
       if(!topActivity.getPackageName().
             equals(context.getPackageName())) 
       { 
         return true; 
       } 
     } 
     return false; 
    } 
    链接：http://www.jb51.net/article/67656.htm