Android用另一个 fragment 替换当前 fragment

Question

我刚开始为 HoneyComb 设计 fragment 。我创建了两个 fragment 。当我单击左侧 fragment 中的按钮时，会在右侧创建一个新 fragment 。同时，当我单击右侧 fragment 中的按钮时(即，我下面代码中的 DetialsFragment 应该被另一个 fragment 替换。main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
    <fragment class="com.fragment.example.Titles"
        android:id="@+id/titles" android:layout_weight="1"
        android:layout_width="0px"
        android:layout_height="match_parent" />
    <FrameLayout android:id="@+id/details" android:layout_weight="1"
        android:layout_width="0px"
        android:layout_height="match_parent" />

</LinearLayout>

FragmentExample.java

public class FragmentExample extends Activity {
/** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

Titles.java

public class Titles extends Fragment {
    public FragmentTransaction ft;
    @Override
    public View onCreateView(LayoutInflater inflater,
        ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.main1, null);
        Button button1 = (Button)v.findViewById(R.id.button1);
        button1.setText("santhosh");
        button1.setOnClickListener(new OnClickListener() {



            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                 DetailsFragment details = (DetailsFragment)
                            getFragmentManager().findFragmentById(R.id.details);
                    if (details == null || details.getShownIndex() != 1) {
                        // Make new fragment to show this selection.
                        details = DetailsFragment.newInstance(1);

                        // Execute a transaction, replacing any existing
                        // fragment with this one inside the frame.
                        ft
                                = getFragmentManager().beginTransaction();
                        ft.add(R.id.details, details, "detail");
                        ft.setTransition(
                                FragmentTransaction.TRANSIT_FRAGMENT_FADE);
                        ft.commit();
                    }
            }

        });
        return v;
    }
}

DetailsFragment.java

public class DetailsFragment extends Fragment {
    /**
     * Create a new instance of DetailsFragment, initialized to
     * show the text at 'index'.
     */
    Titles title = new Titles();
    String[] titles = {"Title1", "Title2", "Title3", "Title4"};
    public static DetailsFragment newInstance(int index) {
        DetailsFragment f = new DetailsFragment();

        // Supply index input as an argument.
        Bundle args = new Bundle();
        args.putInt("index", index);
        f.setArguments(args);

        return f;
    }

    public int getShownIndex() {
        return getArguments().getInt("index", 0);
    }

    @Override
    public View onCreateView(LayoutInflater inflater,
        ViewGroup container, Bundle savedInstanceState) {
        if (container == null) {
            // Currently in a layout without a container, so no
            // reason to create our view.
            return null;
        }
        Button button = new Button(getActivity());
        button.setText("Next");
        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
            }
        });
        return button;
    }
}

Answer 1

然后，如果您的按钮正在显示并且点击事件被触发，您可以在您的点击事件中调用以下内容:

final FragmentTransaction ft = getFragmentManager().beginTransaction(); 
ft.replace(R.id.details, new NewFragmentToReplace(), "NewFragmentTag"); 
ft.commit(); 

如果您想在单击返回时返回 DetailsFragment，请确保将上述事务添加到后台堆栈，即

ft.addToBackStack(null);

或者我错过了什么？或者，有些人建议您的 Activity 获取按钮的单击事件，并负责替换详细信息 Pane 中的 fragment 。