2

I want to add some proper navigation to my app. I have two fragments and I want to make a title strip tabs (similar to the one in Play Newsstand or the Play Store with material design) that switches between the two fragments. I don't have a very good understanding of the ViewPager or PagerAdapter. I'm also trying to use this library. I don't know where to get started. Thanks in advance.

4

2 回答 2

7

实际上，我自己曾经做过一次。好的。

首先，将库添加到build.gradle文件中的依赖项中。

dependencies {
    compile 'com.jpardogo.materialtabstrip:library:1.0.6'
}

这就是我的activity_main.xml的样子。我从支持库中添加了PagerSlidingTabStrip（使用我自己的自定义，请参阅Github 存储库了解更多信息）和我的。ViewPager

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity"
tools:ignore="MergeRootFrame"
android:fitsSystemWindows="true" >

<include layout="@layout/toolbar" />

<com.astuetz.PagerSlidingTabStrip
    android:id="@+id/tabs"
    android:layout_width="match_parent"
    android:layout_height="60dp"
    android:background="#33B5E5"
    android:textColor="#FFFFFF"
    app:pstsIndicatorColor="#FFFFFF"
    app:pstsPaddingMiddle="true" />

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

接下来，我在MainActivity.javaonCreate()的方法中执行了以下步骤：

    // Initialize the ViewPager and set an adapter
    ViewPager pager = (ViewPager) findViewById(R.id.pager);
    pager.setAdapter(new PagerAdapter(getSupportFragmentManager()));

    // Bind the tabs to the ViewPager
    PagerSlidingTabStrip tabs = (PagerSlidingTabStrip) findViewById(R.id.tabs);
    tabs.setViewPager(pager);

最后是FragmentPagerAdapter类，也在MainActivity.java中。注意Fragment getItem()方法；这是我使用选项卡的位置在我的片段之间切换的地方。

class PagerAdapter extends FragmentPagerAdapter {

private final String[] TITLES = {"Regular Tenses", "Perfect Tenses"};

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

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

@Override
public int getCount() {
    return TITLES.length;
}

@Override
public Fragment getItem(int position) {
    switch (position) {
        case 0:
            return new MainFragment();
        case 1:
            return new PerfectFragment();
    }

    return null;
   }
}
于 2014-11-27T00:07:42.833 回答
0

如果你的应用有一个 ActionBar，你可以使用setNavigationMode(NAVIGATION_MODE_TABS). 这里有一个片段代码示例和解释，在添加导航选项卡副标题下。 这里是带有 ActionBar 的可滑动标签。

于 2014-11-27T08:53:09.557 回答