Question

我想在android中实现以下概念： -

Tab A -> Fragment A -> Fragment 1 -> Fragment 2
Tab B -> Fragment B
Tab C -> Fragment C
Tab D -> Fragment D

我在视图寻呼机上添加了标签，并且能够实现直到

Tab A -> Fragment A
Tab B -> Fragment B
Tab C -> Fragment C
Tab D -> Fragment D

我试过

FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(android.R.id.content, fragment1);
ft.addToBackStack(null);
ft.commit();

但无法在Fragment A上添加其他片段。

它会在Fragment A上添加片段1，但Fragment A在后台仍然可见。所以请提供一些建议来完成上述任务。在此先感谢。

Answer 1

这是我的。希望它有用。

首先，你需要为4个标签A，B，C，D创建ContentFragment，如下所示：

public class ContentFragmentA extends BaseFragment {
private static Context context;

@SuppressWarnings("static-access")
public ContentFragmentA(Context context) {
    super();
    this.context = context;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // TODO Auto-generated method stub

    View view = inflater.inflate(R.layout.content_frame_a, container, false);

    this.setFragmentManager(getChildFragmentManager());
    this.setContainerId(R.id.content_frame_a);

    this.replaceFragmentIntoStack(new FragmentOne(context), "FragmentOne");

    return view;
}

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
}}

然后，创建content_fragment_a.xml文件

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/content_frame_a"
android:layout_width="match_parent"
android:layout_height="match_parent" >

然后，对于每个新片段，您应该扩展 BaseFragment 。如果您想将新片段放入选项卡，只需使用 addFragmentIntoStack（）或 replaceFragmentIntoStack（）。

public class BaseFragment extends Fragment{

private FragmentManager fragmentManager;


private int containerId;
private boolean doubleBackToExit = false;
/**
 * @param containerId the containerId to set
 */
public void setContainerId(int containerId) {
    this.containerId = containerId;
}

/**
 * @param fragmentManager the fragmentManager to set
 */
public void setFragmentManager(FragmentManager fragmentManager) {
    this.fragmentManager = fragmentManager;
}

/**
 * 
 */
public BaseFragment() {
    super();
    // TODO Auto-generated constructor stub
    BarddyApplication.getInstance().baseFragment = BaseFragment.this;
}

public void addFragmentIntoStack(BaseFragment newContent, String tagName) {
    newContent.setFragmentManager(fragmentManager);
    newContent.setContainerId(containerId);

    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.add(containerId, newContent, tagName);
    fragmentTransaction.addToBackStack(tagName);

    fragmentTransaction.commitAllowingStateLoss();
}

public void popFragment() {
    fragmentManager.popBackStack();
}

public void replaceFragmentIntoStack(BaseFragment newContent, String tagName) {
    newContent.setFragmentManager(fragmentManager);
    newContent.setContainerId(containerId);

    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.replace(containerId,newContent,tagName);
    fragmentTransaction.addToBackStack(null);

    fragmentTransaction.commitAllowingStateLoss();
}}

在另一个片段上添加片段

1 个答案: