Question

我有一个包含导航抽屉的活动，在该类中我的导航项指向片段类，在其中一个片段类中我使用动态视图寻呼机来显示项目，但我如何使用片段的片段管理器class作为视图寻呼机的参数，需要片段活动或活动的片段参数，需要一些解决方案。

Answer 1

我现在正在做类似的事情。我只有导航抽屉下面的ViewPager，但是如果你有一个更复杂的布局，那么相同的主体应该可以工作。

首先，我有活动布局（大部分是由Android Studio生成的）

<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.you.yourapp.YourActivity">

    <FrameLayout android:id="@+id/your_container" android:layout_width="match_parent"
    android:layout_height="match_parent" />

    <fragment android:id="@+id/navigation_drawer"
    android:layout_width="@dimen/navigation_drawer_width" android:layout_height="match_parent"
    android:layout_gravity="start"
    android:name="com.example.you.yourapp.NavigationDrawerFragment"
    tools:layout="@layout/fragment_navigation_drawer" />

</android.support.v4.widget.DrawerLayout>

活动使用FragmentManager将包含ViewPager的另一个片段交换到FrameLayout

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_your);

    ...

    Fragment fragment = YourFragment.newInstance(Bundle args);
    getSupportFragmentManager()
            .beginTransaction().replace(R.id.your_container, fragment)
            .commit();
}

拥有ViewPager的Fragment很简单

<android.support.v4.view.ViewPager android:id="@+id/your_view_pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

在YourFragment.java中实现你的FragmentPagerAdapter（你可以把它作为一个内部类，但是我遇到了静态分配的问题，加上这个更干净了）

public class YourFragment extends android.support.v4.app.Fragment {

    private ViewPager mPager;

    public YourFragment() {

}

public static TaskFragment newInstance(Uri uri, String outlineText) {
    TaskFragment fragment = new YourFragment();

    Bundle args = new Bundle();
    //set args
    fragment.setArguments(args);

    return fragment;
}

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

    ...
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                          Bundle savedInstanceState)
{
    View rootView = inflater.inflate(R.layout.fragment_your, null);
    mPager = (ViewPager) rootView.findViewById(R.id.your_view_pager);

    TaskPagerAdapter adapter = new TaskPagerAdapter(getFragmentManager());
    mPager.setAdapter(adapter);

    return rootView;
}

...

private class YourPagerAdapter extends FragmentStatePagerAdapter {

    public YourPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public int getCount() {
        return count; //however you get the count
    }

    @Override
    public android.support.v4.app.Fragment getItem(int position) {
        //set the arguments for your page
        return PageFragment.newInstance(args);
    }

}

}

ETA：所以现在为导航抽屉回调实现自定义界面

...
private NavigationDrawerCallbacks mCallbacks

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    mCallbacks = (NavigationDrawerCallbacks) activity;
}

...

@Override
public void onClick(View view) { //whatever your click listener is
    Fragment fragment = getFragmentSomehow(); //get your fragment
    mCallbacks.onNavigationItemSelected(fragment);
}

...

public static interface NavigationDrawerCallbacks {
    void onNavigationDrawerItemSelected(Fragment fragment);
}

现在让YourActivity实现此接口

public class YourFragment extends Activity
        implements NavigationDrawerCallbacks
{

...

    @Override
    public void onNavigationDrawerItemSelected(Fragment fragment) {
        getSupportFragmentManeger()
            .beginTransaction()
            .replace(R.id.you_container, fragment)
            .commit();
    }
...
}

我认为这就是你的意思。希望这有帮助

如何在viewpager中显示片段，在片段类中？

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