Question

我在活动上设置滑动选项卡视图，但是问题是活动的操作栏在标签视图之前出现时消失了。请指导我如何在标签视图顶部再次显示操作栏。

MainActivity：

public class MainActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Get the view from activity_main.xml
        setContentView(R.layout.activity_main);

Toolbar myToolbar = (Toolbar) findViewById(R.id.tool_bar);
        setSupportActionBar(myToolbar);

        // Locate the viewpager in activity_main.xml
        ViewPager viewPager = (ViewPager) findViewById(R.id.pager);

        ((ViewPager.LayoutParams) (findViewById(R.id.tab_strip)).getLayoutParams()).isDecor = true;

        // Set the ViewPagerAdapter into ViewPager
        viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
    }

}

Tab1：tab2和tab3的simlar 公共类FragmentTab1扩展了Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // Get the view from fragmenttab1.xml
        View view = inflater.inflate(R.layout.fragmenttab1, container, false);
        return view;
    }

}

ViewPageAdapter：

public class ViewPagerAdapter extends FragmentPagerAdapter {

    final int PAGE_COUNT = 3;
    // Tab Titles
    private String tabtitles[] = new String[] { "Tab1", "Tab2", "Tab3" };
    Context context;

    public ViewPagerAdapter(FragmentManager fm) {
        super(fm);
    }

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

    @Override
    public Fragment getItem(int position) {
        switch (position) {

            // Open FragmentTab1.java
        case 0:
            FragmentTab1 fragmenttab1 = new FragmentTab1();
            return fragmenttab1;

            // Open FragmentTab2.java
        case 1:
            FragmentTab2 fragmenttab2 = new FragmentTab2();
            return fragmenttab2;

            // Open FragmentTab3.java
        case 2:
            FragmentTab3 fragmenttab3 = new FragmentTab3();
            return fragmenttab3;
        }
        return null;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return tabtitles[position];
    }
}

Styles.xml：

<!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
        <item name="windowActionBar">true</item>
        <item name="windowNoTitle">false</item>
    </style>

清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.zohaibsiddique.myapplication">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity android:name=".MainActivity" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.Toolbar
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/tool_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:elevation="10dp"
        app:theme="@style/ThemeOverlay.AppCompat.Dark"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
        android:minHeight="?attr/actionBarSize" />

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v4.view.PagerTabStrip
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tab_strip"
        android:layout_gravity="top"
        android:paddingBottom="10dp"
        android:paddingTop="10dp"
        android:textColor="#000000" />

</android.support.v4.view.ViewPager>
   </LinearLayout>

Answer 1

添加PagerTabStrip以显示页面标题：

<android.support.v4.view.ViewPager
   android:id="@+id/vpPager"
   android:layout_width="match_parent"
   android:layout_height="wrap_content">

   <android.support.v4.view.PagerTabStrip
        android:id="@+id/pager_header"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:paddingBottom="4dp"
        android:paddingTop="4dp" />

</android.support.v4.view.ViewPager>

有关详细信息，请参阅此链接：

https://github.com/codepath/android_guides/wiki/ViewPager-with-FragmentPagerAdapter

Answer 2

我自己解决了我的问题。我只是将MainActivity扩展到AppCompatActivity并重新显示操作栏。

滑动选项卡视图上的操作栏消失

2 个答案: