如何在android

Question

我检查了以下问题并没有解决我的问题：

How to add Run Time Tabs into TabHost in Android?

Create TabView at runtime?

adding tabs dynamically in android

// MainActivity.java

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class MainActivity extends ActionBarActivity implements
        android.support.v7.app.ActionBar.TabListener {
    ViewPager viewPager;

    // Using appcompat action bar
    private android.support.v7.app.ActionBar actionBar;

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

        viewPager = (ViewPager) findViewById(R.id.pager);
        FragmentManager fragmnetManager = getSupportFragmentManager();
        viewPager.setAdapter(new MyAdapter(fragmnetManager));

        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener()
        {
            @Override
            public void onPageSelected(int pos)
            {
                actionBar.setSelectedNavigationItem(pos);
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2)
            {

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {

            }
        });

        // Getting actionbar
        actionBar = getSupportActionBar();

        // Setting navigation mode to actionbar
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        // Now adding a new tab to action bar and setting title, icon and
        // implementing listener
        android.support.v7.app.ActionBar.Tab tab1 = actionBar.newTab();
        tab1.setText("TAB1");
        // tab1.setIcon(R.drawable.ic_launcher);
        tab1.setTabListener(this);

        android.support.v7.app.ActionBar.Tab tab2 = actionBar.newTab();
        tab2.setText("TAB2");
        tab2.setTabListener(this);

        android.support.v7.app.ActionBar.Tab tab3 = actionBar.newTab();
        tab3.setText("TAB3");
        tab3.setTabListener(this);

        // Now finally adding all tabs to actionbar
        actionBar.addTab(tab1);
        actionBar.addTab(tab2);
        actionBar.addTab(tab3);

    }

    @Override
    public void onTabReselected(android.support.v7.app.ActionBar.Tab arg0,
                                FragmentTransaction arg1)
    {

    }

    @Override
    public void onTabSelected(android.support.v7.app.ActionBar.Tab tab,
                              FragmentTransaction arg1)
    {

        // Setting current position of tab to view pager
        viewPager.setCurrentItem(tab.getPosition());
    }

    @Override
    public void onTabUnselected(android.support.v7.app.ActionBar.Tab arg0,
                                FragmentTransaction arg1) {

    }

}

// My adapter i.e. custom adapter for displaying fragments over view pager
class MyAdapter extends FragmentPagerAdapter {
    public MyAdapter(FragmentManager fm) {
        super(fm);

    }

    @Override
    public Fragment getItem(int i) {

        // Getting fragments according to selected position
        Fragment fragment = null;
        if (i == 0) {
            fragment = new FragmentA();
        }
        if (i == 1) {
            fragment = new FragmentB();
        }
        if (i == 2) {
            fragment = new FragmentC();
        }

        // and finally returning fragments
        return fragment;
    }

    @Override
    public int getCount() {

        // Returning no. of counts of fragments
        return 3;
    }
}

此代码可以提供3个带有Fragments的选项卡，我也可以添加更多选项卡。但我的问题是选项卡的数量应该取决于用户输入。那么我该如何添加或删除标签？是否可以在运行时添加更多选项卡？

Answer 1

我解决了我的问题新代码：

公共类MainActivity扩展了AppCompatActivity {

typeahead

}