Question

阅读＆＃34; Head First Android Programming＆＃34;，它有点过时了，所以本书中显示的代码也已经过时了。 My Code

Android Studio说：错误的第二个参数类型。找到：com.xfunny.workout.WorkoutDetailFragment＆＃39;，required：android.app.Fragment＆＃39;

CREATE VIEW QueryV5 AS 
SELECT DISTINCT 
    C.Name, P.Name AS PlanetName, SUM(T.[Time of Departure] - T.[Time of Arrival]) AS TotalTime 
FROM cmpt354_starwars.dbo.TimeTable T 
JOIN cmpt354_starwars.dbo.Characters C ON C.Name = T.CharacterName
JOIN cmpt354_starwars.dbo.Planets P ON P.Name = T.PlanetName
WHERE P.Affiliation = 'neutral' 
GROUP BY C.Name, P.Name

}

Answer 1

做这样的事情

android.app.Fragment details = new WorkoutDetailFragment();

而不是

WorkoutDetailFragment details = new WorkoutDetailFragment();

Answer 2

由于您使用的是AppCompatActivity，因此您需要使用支持库中的Fragment，即import android.support.v4.app.Fragment

当然，如果您切换到支持片段，则需要使用getSupportFragmentManager()代替getFragmentManager()

错误的第二个参数类型与片段

2 个答案: