android - 无法从类型中对非静态方法 getSystemService(String) 进行静态引用

Question

我有这个功能哪个网络连接

public boolean isNetworkConnected() {
    ConnectivityManager conManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
   NetworkInfo netInfo = conManager.getActiveNetworkInfo();

   if (netInfo == null) {
       // There are no active networks.
       return false;
   } else {
       return true;
   }
}

但是当我试图让它静态化以便我可以在它抛出的每个 Activity 中使用它时:

Cannot make a static reference to the non-static method getSystemService(String) from the type

不想每次都创建类的对象。

Answer 1

添加非静态依赖作为参数:

public static boolean isNetworkConnected(Context c) {
      ConnectivityManager conManager = (ConnectivityManager) c.getSystemService(Context.CONNECTIVITY_SERVICE);
      NetworkInfo netInfo = conManager.getActiveNetworkInfo();
      return ( netInfo != null && netInfo.isConnected() );
}