Question

我有一个NavigationDrawer，在单击一个菜单项时会在MainActivity中显示片段。

其中一个片段称为MainFragment，它使用TabHost显示标签。标签是另外两个片段（FragmentOne和FragmentTwo）。

一切正常，但我无法对WhatsApp标签之类的滑动功能和效果进行编码。我搜索了许多示例/教程，但所有这些都展示了如何使用活动进行操作，而且我无法使用片段实现它。我希望你能帮助我。谢谢。

我的只有一个片段需要标签。

MainFragment：

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTabHost;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.podtest.R;

public class MainFragment extends Fragment {

    private FragmentTabHost mTabHost;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        mTabHost = new FragmentTabHost(getActivity());
        mTabHost.setup(getActivity(), getChildFragmentManager(), R.layout.fragment_main);

        Bundle arg1 = new Bundle();
        arg1.putInt("Arg for Frag1", 1);
        mTabHost.addTab(mTabHost.newTabSpec("Tab1").setIndicator("Frag Tab1"),
                FragmentOne.class, arg1);

        Bundle arg2 = new Bundle();
        arg2.putInt("Arg for Frag2", 2);
        mTabHost.addTab(mTabHost.newTabSpec("Tab2").setIndicator("Frag Tab2"),
                FragmentTwo.class, arg2);

        return mTabHost;

    }
}

MainActivity：

    import android.support.v4.app.FragmentManager;
    import android.os.Bundle;
    import android.support.design.widget.FloatingActionButton;
    import android.support.design.widget.Snackbar;
    import android.view.View;
    import android.support.design.widget.NavigationView;
    import android.support.v4.view.GravityCompat;
    import android.support.v4.widget.DrawerLayout;
    import android.support.v7.app.ActionBarDrawerToggle;
    import android.support.v7.app.AppCompatActivity;
    import android.support.v7.widget.Toolbar;
    import android.view.Menu;
    import android.view.MenuItem;

    import com.podtest.fragments.ImportFragment;
    import com.podtest.fragments.MainFragment;

    public class MainActivity extends AppCompatActivity
            implements NavigationView.OnNavigationItemSelectedListener {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
            setSupportActionBar(toolbar);

            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                            .setAction("Action", null).show();
                }
            });

            DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
            ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                    this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
            drawer.addDrawerListener(toggle);
            toggle.syncState();

            NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
            navigationView.setNavigationItemSelectedListener(this);

            FragmentManager fm = getSupportFragmentManager();
            fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit();
        }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {

        FragmentManager fm = getSupportFragmentManager();

        int id = item.getItemId();

        if (id == R.id.nav_camera) {
            fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit();
        } else if (id == R.id.nav_gallery) {
            fm.beginTransaction().replace(R.id.content_frame, new ImportFragment()).commit();
        } else if (id == R.id.nav_slideshow) {

        } else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

Answer 1

对于滑动功能，您最好使用与TabLayout配对的ViewPager。两者都在设计支持库中提供。

你可以在这里看到一个有效的例子： http://blog.grafixartist.com/material-design-tabs-with-android-design-support-library/

上面的例子在一个Activity中，但我使用了类似的

使用tabhost在片段内滑动选项卡

1 个答案: