Question

我实施了一个有三个标签的TabLayout。当我刷页面一切正常工作时，它也适用于我只使用标签点击导航。但是，当我滑动页面并单击任何先前选择的选项卡时，问题就出现了，只有选项卡指示符更改为新选项卡，但文本突出显示并且页面没有更改。

我检查了TabLayout的点击监听器，它在上述情况下没有执行。

更多信息：

minSdk:16
targetSdk:24

我尝试过支持库24.0.0和24.1.1

TabSelectedListener。

        tabs.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            tabPages.setCurrentItem(tab.getPosition());
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {

        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {

        }
    });

PagerAdapter

public class TabPageAdapter extends FragmentStatePagerAdapter {
public TabPageAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {
    Fragment f1 = new Fragment1();
    Fragment f2 = new Fragment2();
    Fragment f3 = new Fragment3();

    switch (position) {
        case 0:
            return f1;
        case 1:
            return f2;
        case 2:
            return f3;
    }
    return null;
}


@Override
public int getCount() {
    return 3;
}

}

Answer 1

您可以完全避免OnTabSelectedListener，TabLayout有convenience method：

tabs.setupWithViewPager(tabPages);

Answer 2

TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
        tabLayout.addTab(tabLayout.newTab().setText("Comparison"));
        tabLayout.addTab(tabLayout.newTab().setText("Details"));
        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

        final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
        final PagerAdapter adapter = new PagerAdapter
                (getSupportFragmentManager(), tabLayout.getTabCount());
        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
        tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });

在活动中插入此代码。在活动xml文件中添加以下代码

<android.support.design.widget.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorM3signin"
        app:tabSelectedTextColor="@color/com_facebook_button_background_color_pressed"
        app:tabTextColor="@color/com_facebook_button_background_color_pressed"
        android:elevation="6dp"
        android:inputType="textCapCharacters"
        app:tabTextAppearance="@android:style/TextAppearance.Widget.TabWidget"
        app:tabIndicatorColor="@color/com_facebook_button_background_color_pressed"
        app:tabIndicatorHeight="5dp"
        android:minHeight="?attr/actionBarSize"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        android:layout_below="@+id/toolbar" />

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:layout_below="@id/tab_layout"/>

检查此PagerAdapeter类。

public class PagerAdapter extends FragmentStatePagerAdapter {
    int mNumOfTabs;

    public PagerAdapter(FragmentManager fm, int NumOfTabs) {
        super(fm);
        this.mNumOfTabs = NumOfTabs;
    }

    @Override
    public Fragment getItem(int position) {

        switch (position) {
            case 0:
                TabFragmentOne tab1 = new TabFragmentOne();
                return tab1;
            case 1:
                TabFragmentTwo tab2 = new TabFragmentTwo();
                return tab2;

            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        return mNumOfTabs;
    }
}

使用Android TabLayout选项卡面临问题单击

2 个答案: