从带有某些片段的导航抽屉中选择滑动选项卡菜单项

Question

我有一个使用库 (https://github.com/mikepenz/MaterialDrawer) 的项目导航抽屉，其中包含 3 个片段（HomeFragment、LiveFragment、MovieFragment）的滑动选项卡。

我是在 MainActivity.class 中创建导航抽屉的，其中有一些项目（主页、直播电视、电影）。当我从导航抽屉中单击项目主页然后转到 HomeFragment 时，我想要。我尝试使用下面的代码但是当我从导航抽屉中单击项目主页时没有任何反应。请帮我解决这个问题。谢谢 :)

这是我的MainAactivity.class

public class MainActivity extends AppCompatActivity{
public final static int NAV_ID_FRAG_ONE = 1;
public final static int NAV_ID_FRAG_TWO = 2;
public final static int NAV_ID_FRAG_THREE = 3;
public final static int NAV_ID_ABOUT_ACTIVITY = 6;

Toolbar toolbar;
private SlidingTabLayout mSlidingTabLayout;
private ViewPager mViewPager;
private Drawer result;
private AccountHeader headerResult;


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


    mViewPager = (ViewPager) findViewById(R.id.vp_tabs);
    mViewPager.setAdapter(new TabAdapter(getSupportFragmentManager(), this));

    mSlidingTabLayout = (SlidingTabLayout) findViewById(R.id.st1_tabs);
    mSlidingTabLayout.setDistributeEvenly(true);//meratakan posisi icon
    mSlidingTabLayout.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
    mSlidingTabLayout.setSelectedIndicatorColors(getResources().getColor(R.color.slidingcolor));
    mSlidingTabLayout.setCustomTabView(R.layout.tab_view, R.id.tv_tab);
    mSlidingTabLayout.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }

        @Override
        public void onPageSelected(int position) {

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });

    mSlidingTabLayout.setViewPager(mViewPager);
    //Navigation Drawer
    //Header
    AccountHeader headerResult = new AccountHeaderBuilder()
            .withActivity(this)
            .withCompactStyle(false)
            .withSavedInstance(savedInstanceState)
            .withThreeSmallProfileImages(false)
            .withHeaderBackground(R.drawable.header)
            .build();

    //List Drawer
    Drawer result = new DrawerBuilder()
            .withActivity(this)
            .withToolbar(toolbar)
            .withDisplayBelowStatusBar(true)
            .withActionBarDrawerToggleAnimated(true)
            .withDrawerGravity(Gravity.LEFT)
            .withSavedInstance(savedInstanceState)
            .withAccountHeader(headerResult)
            .withHasStableIds(true)
            .withAccountHeader(headerResult) //set the AccountHeader we created earlier for the header
            .addDrawerItems(//set item drawer
                    new PrimaryDrawerItem().withName("Home").withDescription("Beranda").withIcon(R.drawable.ic_home_black_48dp).withIdentifier(NAV_ID_FRAG_ONE).withSelectable(false),
                    new PrimaryDrawerItem().withName("Live TV").withDescription("Siaran Televisi").withIcon(R.drawable.ic_live_tv_black_48dp).withIdentifier(NAV_ID_FRAG_TWO).withSelectable(false),
                    new PrimaryDrawerItem().withName("Movies").withDescription("Film-film").withIcon(R.drawable.ic_local_movies_black_48dp).withIdentifier(NAV_ID_FRAG_THREE).withSelectable(false),
                    new ExpandableDrawerItem().withName("Categories").withLevel(2).withIdentifier(4).withSelectable(false).withSubItems(
                            new SecondaryDrawerItem().withName("Action").withLevel(3).withIdentifier(2000),
                            new SecondaryDrawerItem().withName("Comedy").withLevel(3).withIdentifier(2001)
                    ),
                    new SectionDrawerItem().withName("Others"),
                    new SecondaryDrawerItem().withName("Account").withIcon(R.drawable.ic_account_box_black_48dp).withIdentifier(5).withSelectable(false),
                    new SecondaryDrawerItem().withName("About").withIcon(R.drawable.ic_info_black_48dp).withIdentifier(NAV_ID_ABOUT_ACTIVITY).withSelectable(false),
                    new SecondaryDrawerItem().withName("Logout").withIcon(R.drawable.ic_exit_to_app_black_48dp).withIdentifier(7).withSelectable(false)
            )
            .withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
                @Override
                public boolean onItemClick(View view, int i, IDrawerItem drawerItem) {
                    Fragment fragment = null;

                    switch ((int) drawerItem.getIdentifier()) {
                        case NAV_ID_FRAG_ONE:
                            fragment = new HomeFragment();
                            break;
                        case NAV_ID_FRAG_TWO:
                            fragment = new LiveFragment();
                            break;
                        case NAV_ID_FRAG_THREE:
                            fragment = new MovieFragment();
                            break;
                        case NAV_ID_ABOUT_ACTIVITY:
                            Intent intent = new Intent(MainActivity.this, AboutActivity.class);
                            startActivity(intent);
                            break;
                    }

                    return false;
                }
            })
            .withSelectedItem(1)
            .withFireOnInitialOnClick(true)
            // add the items we want to use with our Drawer
            .build();

    new RecyclerViewCacheUtil<IDrawerItem>().withCacheSize(2).apply(result.getRecyclerView(), result.getDrawerItems());

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.action_settings:
            // User chose the "Settings" item, show the app settings UI...
            Intent in = new Intent("com.ajjunaedi.jmnanywhere.AboutActivity");
            startActivity(in);
            return true;

        default:
            return super.onOptionsItemSelected(item);
    }
}

}

Answer 1

您需要将 FragmentManager 添加到 add/remove/replace 片段。

        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.beginTransaction().replace(R.id.fragment,fragment).commit();

getSupportFragmentManager() = Return FragmentManager 用于与与此 activity 关联的片段进行交互。

.beginTransaction() = 对与此 FragmentManager 关联的 Fragment 开始一系列编辑操作。

R.id.fragment 是您放置片段的容器的 ID。

有关更多信息，请参阅此 post -

编辑： 您将在 switch 语句之后添加它。希望这就是您要找的答案。

将此添加到您的 xml 文件中。在基本布局内

<RelativeLayout
    android:id="@+id/fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

根据您的需要调整大小。或者您可以简单地将行 android:id="@+id/fragment" 添加到您的基本布局中。

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