带有片段选项卡中的导航抽屉

我正在制作一个安卓应用程序。我正在使用导航抽屉，我使用导航抽屉膨胀的一些片段包含选项卡布局，有些是带有文本视图的普通片段。

我面临 2 个问题，当

我打开带有选项卡的导航抽屉项目，之后它会自动将这些选项卡保留在视图中，即使对于没有选项卡的片段也是如此。
当我第二次或更多次打开带有选项卡的片段时.它复制了选项卡。我的意思是，如果第一次没有选项卡是 3，那么下次当我打开片段时没有。的选项卡加倍。

使用导航抽屉的活动

public class MainFeedActivity extends FragmentActivity {
public DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mDrawertitles;
LinearLayout drawerll;
String username;
TextView t;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_mainfeed);
    username = getIntent().getExtras().getString("username").toString();
    t = (TextView) findViewById(R.id.drawer_uname_tv);
    t.setText(username);
    mTitle = mDrawerTitle = getTitle();
    mDrawertitles = getResources().getStringArray(R.array.array);
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerList = (ListView) findViewById(R.id.left_drawer);
    drawerll = (LinearLayout) findViewById(R.id.drawerll);
    // set a custom shadow that overlays the main content when the drawer
    // opens
    mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
            GravityCompat.START);
    mDrawerList.setAdapter(new ArrayAdapter<String>(this,
            R.layout.drawer_list_item, mDrawertitles));
    mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
    getActionBar().setDisplayHomeAsUpEnabled(true);
    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.drawable.ic_drawer, R.string.drawer_open,
            R.string.drawer_close) {
        public void onDrawerClosed(View view) {
            getActionBar().setTitle(mTitle);
            invalidateOptionsMenu(); // creates call to
                                        // onPrepareOptionsMenu()
        }
        public void onDrawerOpened(View drawerView) {
            getActionBar().setTitle(mDrawerTitle);
            invalidateOptionsMenu(); // creates call to
                                        // onPrepareOptionsMenu()
        }
    };
    mDrawerLayout.setDrawerListener(mDrawerToggle);
    if (savedInstanceState == null) {
        selectItem(2);
    }
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // The action bar home/up action should open or close the drawer.
    // ActionBarDrawerToggle will take care of this.
    if (mDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }
    return true;
}
private class DrawerItemClickListener implements
        ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        selectItem(position);
    }
}
private void selectItem(int position) {
    if (position == 0) {
        Fragment fragment = new Home();
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.content_frame, fragment).commit();
        mDrawerList.setItemChecked(position, true);
        mDrawerLayout.closeDrawer(drawerll);
    }
    else if (position == 1) {
        Fragment fragment = new Statistics();
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.content_frame, fragment).commit();
        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);
        mDrawerLayout.closeDrawer(drawerll);
    } else {
        Fragment fragment = new Help();
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.content_frame, fragment).commit();
        // update selected item and title, then close the drawer
        mDrawerLayout.closeDrawer(drawerll);
    }
}
/*
 * 
 * protected boolean isOnline() { ConnectivityManager cm =
 * (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
 * NetworkInfo netInfo = cm.getActiveNetworkInfo(); if (netInfo != null &&
 * netInfo.isConnectedOrConnecting()) { return true; } else { return false;
 * } }
 */
@Override
public void setTitle(CharSequence title) {
    mTitle = title;
    getActionBar().setTitle(mTitle);
}
/**
 * When using the ActionBarDrawerToggle, you must call it during
 * onPostCreate() and onConfigurationChanged()...
 */
@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
    mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    mDrawerToggle.onConfigurationChanged(newConfig);
}
/**
 * Fragment that appears in the "content_frame", shows a planet
 */

}

碎片

  public class Home extends Fragment {
ActionBar.Tab Tab1, Tab2, Tab3;
Fragment fragmentTab1 = new Connected();
Fragment fragmentTab2 = new Disconnected();
Fragment fragmentTab3 = new AllDevices();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_tabs, container, false);
    ActionBar actionBar = getActivity().getActionBar();
    actionBar.setDisplayShowHomeEnabled(true);
    // Hide Actionbar Title
    actionBar.setDisplayShowTitleEnabled(true);
    // Create Actionbar Tabs
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
    Tab1 = actionBar.newTab().setText("Tab1");
    Tab2 = actionBar.newTab().setText("Tab2");
    Tab3 = actionBar.newTab().setText("Tab3");
    Tab1.setTabListener(new TabListener(fragmentTab1));
    Tab2.setTabListener(new TabListener(fragmentTab2));
    Tab3.setTabListener(new TabListener(fragmentTab3));
    actionBar.addTab(Tab1);
    actionBar.addTab(Tab2);
    actionBar.addTab(Tab3);
    return view;
}

}

碎片：

public class Help  extends Fragment {

Button b;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.help, container, false);
    setHasOptionsMenu(false);
        return rootView;
}

}

我得到了我的问题的解决方案：

丹佛编码器的帮助下解决的第一个问题9

当位置！= 1时，您需要更改操作栏导航模式...。安卓动作栏：动态显示/隐藏标签？– 丹佛编码器9

第二个问题的解决方案是我需要使用这个

ActionBar actionBar = getActivity（）.getActionBar（）;

    actionBar.removeAllTabs();
    actionBar.setDisplayShowHomeEnabled(true);
    actionBar.setDisplayShowTitleEnabled(true);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

在家.java类

这解决了选项卡重复的问题。

感谢Stackoverflow帮助我:)

我遇到了同样的问题，所以解决方案很简单。

答1：如果您不希望特定片段中的选项卡，则可以将导航栏设置为

actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);

Ans 2：每次选择它时，要么从主片段中删除选项卡，要么可以检查那里是否已经存在所需的选项卡，然后不要像这样在其中添加更多选项卡

int tabCount= actionBar.getTabCount();
if(tabCount!=3){
Tab1 = actionBar.newTab().setText("Tab1");
    Tab2 = actionBar.newTab().setText("Tab2");
    Tab3 = actionBar.newTab().setText("Tab3");
    Tab1.setTabListener(new TabListener(fragmentTab1));
    Tab2.setTabListener(new TabListener(fragmentTab2));
    Tab3.setTabListener(new TabListener(fragmentTab3));
    actionBar.addTab(Tab1);
    actionBar.addTab(Tab2);
    actionBar.addTab(Tab3);
}
return view;

希望它能解决您的问题

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