Question

当片段发生变化时，我想阻止videoView在viewPager中播放。代码中的问题是当我改变或进入下一个片段时视频仍在播放。

以下是Main Activity类的代码

private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new FragmentStepOne(), "1");
adapter.addFragment(new FragmentStepTwo(), "2");
viewPager.setAdapter(adapter);
}

class ViewPagerAdapter extends FragmentStatePagerAdapter {

private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();

public ViewPagerAdapter(FragmentManager manager) {

    super(manager);
}

@Override
public Fragment getItem(int position) {
    return mFragmentList.get(position);
}

@Override
public int getCount() {

    return mFragmentList.size();
}


public void addFragment(Fragment fragment, String title) {
    mFragmentList.add(fragment);
    mFragmentTitleList.add(title);
}

这是Fragment类的代码

public class FragmentStepOne extends Fragment{

public FragmentStepOne() {
}


VideoView video;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                     Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView =  inflater.inflate(R.layout.fragment_step_two, container,        false);

video = (VideoView) rootView.findViewById(R.id.videoView);

Uri uri = Uri.parse("android.resource://"+ getActivity().getPackageName()+"/"+ R.raw.video);
video.setVideoURI(uri);

MediaController mc=new MediaController(getContext());
mc.setAnchorView(video);
video.setMediaController(mc);
video.requestFocus();



return rootView;
}

请提前帮助谢谢

Answer 1

在您的片段中覆盖<div class="form-inline">

因为在override fun setUserVisibleHint(isVisibleToUser: Boolean)之前调用了setUserVisibleHint，所以请确保检查视图是否不为空（以便避免出现空指针异常）。

这是我实施我的方法：

onCreateView

我正在扩展片段override fun setUserVisibleHint(isVisibleToUser: Boolean) { super.setUserVisibleHint(isVisibleToUser) if (view != null) if (!isVisibleToUser) if (videoView.isPlaying) { videoView.stopPlayback() } }

如何在更改片段时停止Videoview在viewPager内播放

1 个答案: