分段交易與列表片段

Question

我想實現一個導航抽屜。 「片段1」是一個列表片段：

public class Fragment1 extends ListFragment { 
private List<String> musicList; 

public static ListFragment newInstance(Context context) { 
    Fragment1 f = new Fragment1(); 

    return f; 
} 

但是我不能使用fragmenttransaction替換片段中的主要活動：

public class MainActivity extends AbstractNavDrawerActivity { 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    if (savedInstanceState == null) { 
     getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, new Fragment1()).commit(); 
    } 
} 


@Override 
protected void onNavItemSelected(int id) { 
    switch ((int)id) { 
    case 101: 
     getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, new Fragment1()).commit(); 
     break; 
    case 102: 
     getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, new Fragment2()).commit(); 
     break; 
    } 
} 

}

的替換方法具有其下一個紅線並說：

The method replace(int, Fragment) in the type FragmentTransaction is not applicable for the arguments (int, Fragment1)"

我該怎麼辦？

Answer 1

getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.content_frame,  new Fragment1()).commit(); 

國際海事組織你應該避免在方法代碼之後有方法調用這樣長的代碼，這很麻煩，很難理解！也許嘗試：

FragmentTransaction transaction = getActivity().getSupportFragmentManager() 
        .beginTransaction(); 
Fragment newFragment = new Fragment1(); 
transaction.add(R.id.content_frame, newFragment); 
transaction.addToBackStack(null); 
transaction.commit();