inconvertiable類型，無法施展，片段

Question

private void changeCity(String city) 
{ 
WeatherFragment wf =(WeatherFragment)getSupportFragmentManager().findFragmentById(R.id.container); 
wf.changeCity(city); 
} 

這是我的錯誤：

Inconvertible type; cannot cast 'android.support.v4.app.Fragment'to'. Can you give me a solution? Thanks in advance.

Answer 1

在您的應用程序可以顯示 「進口」？

我認爲在WeatherFragment擴展Fragment。您必須

import android.support.v4.app.Fragment;