3

我正在查看有关如何使用 TabLayout 的指南。这就是他们显示附加 PagerAdapter 类的方式。

public class MainActivity extends FragmentActivity {

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

    // Get the ViewPager and set it's PagerAdapter so that it can display items
    ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
    viewPager.setAdapter(new SampleFragmentPagerAdapter(getSupportFragmentManager(), 
        MainActivity.this));

    // Give the TabLayout the ViewPager
    TabLayout tabLayout = (TabLayout) findViewById(R.id.sliding_tabs);
    tabLayout.setupWithViewPager(viewPager);
}

但是,他们的 TabLayout 在 Activity 中,而我的在 Fragment 中。我无法根据我的用例调整他们的代码,因为我不完全理解活动和片段之间的实际差异。现在,当我尝试在标签之间滑动时,什么也没有发生。这是我的代码:

public class CandidateListFragment extends Fragment {
public static final String TAG = "candidates";

@InjectView(R.id.tabLayout) TabLayout tabLayout;

public CandidateListFragment() {
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_candidatelist, container, false);
    initInstances(v);
    return v;
}

private void initInstances(View v){
    //TODO: Change to support below API level 21
    getActivity().findViewById(R.id.toolbar_actionbar).setElevation(R.dimen.toolbar_candidatelist_elevation);
    ViewPager viewPager = (ViewPager) v.findViewById(R.id.viewpager);
    viewPager.setAdapter(new TabsFragmentPagerAdapter(getActivity().getSupportFragmentManager(),
            getActivity()));
    ButterKnife.inject(this, v);
    tabLayout.setupWithViewPager(viewPager);
}

@Override public void onDestroyView() {
    super.onDestroyView();
    ButterKnife.reset(this);
}
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1 回答 1

3

我想到了!!!我将片段的 xml 布局文件设置为 RelativeLayout 而不是 LinearLayout,因此我的 ViewPager 不在屏幕上,这意味着我无法滑动。是简单的错误让我

于 2015-06-27T19:12:42.490 回答