Android 判斷當前的界面是否是桌面的方法

    /**  
       * 判斷當前界面是否是桌面  
       */    
      private boolean isHome() {    
          ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);    
          List<RunningTaskInfo> rti = mActivityManager.getRunningTasks(1);    
          return getHomes().contains(rti.get(0).topActivity.getPackageName());    
      }    

      /**  
       * 獲得屬于桌面的應用的應用包名稱  
       *   
       * @return 返回包含所有包名的字符串列表  
       */    
      private List<String> getHomes() {    
          List<String> names = new ArrayList<String>();    
          PackageManager packageManager = this.getPackageManager();    
          Intent intent = new Intent(Intent.ACTION_MAIN);    
          intent.addCategory(Intent.CATEGORY_HOME);    
          List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities(intent,    
                  PackageManager.MATCH_DEFAULT_ONLY);    
          for (ResolveInfo ri : resolveInfo) {    
              names.add(ri.activityInfo.packageName);    
          }    
          return names;    
      }