Question

我必须在视图寻呼机内播放3个视频，我使用PagerAdapter转到不同的页面。我遇到了一些问题：第一次，第一个视频没有渲染，它显示黑屏。我的第二个视频仅在访问时第一次运行。当我访问该页面时，其他视频会再次运行。以下是我正在使用的课程

enter code here
public class VideoPagerAdapter extends PagerAdapter {

    Context context;
    static int[] arrayvid;
    private VideoView videoView;
    LayoutInflater inflater;
    View layout;
    TextView message;


    public VideoPagerAdapter(Context context, int[] arrayvid) {
        this.context = context;
        this.arrayvid = arrayvid;
        inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        ((ViewPager) container).removeView((View) object);
    }

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

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        layout = inflater.inflate(R.layout.video_layout, container, false);
        videoView = (VideoView)layout.findViewById(R.id.video_view);
        message = (TextView)layout.findViewById(R.id.message);

        MediaController mediaController = new MediaController(context, false);
        mediaController.setAnchorView(videoView);
        ((ViewPager) container).addView(layout);
        return layout;

    }

    private Uri getPath(int id) {
        Log.i("Video", "num" + id);

        return Uri.parse("android.resource://com.example.videoviewpager/raw/video_" + id);
    }

    public void play(int position) {
        videoView.setVideoURI(getPath(position+1));
        videoView.requestFocus();

        videoView.start();

    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view==(View)object;
    }


public class MainActivity extends AppCompatActivity {

    ViewPager viewPager;
    PagerAdapter adapter;
    private int[] ids = {R.raw.video_1, R.raw.video_2,R.raw.video_3};


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(
                WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);

        viewPager = (ViewPager) findViewById(R.id.video_pager);

        // Pass results to ViewPagerAdapter Class
        adapter = new VideoPagerAdapter(MainActivity.this,ids);
        viewPager.setAdapter(adapter);

        viewPager.setCurrentItem(0);
        //((VideoPagerAdapter) adapter).play(0);

        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                if(position==0){
                    ((VideoPagerAdapter) adapter).play(position);


                }
                if(position==1){

                    ((VideoPagerAdapter) adapter).play(position);
                }
                if(position==2){
                    ((VideoPagerAdapter) adapter).play(position);
                }
            }
//
            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }

    private Uri getPath(int id) {
        Log.i("Video", "num" + id);

        return Uri.parse("android.resource://com.example.videoviewpager/raw/video_" + id);
    }
}

Answer 1

在viewpager中显示视频的最简单方法是使用FragmentStatePagerAdapter代替PagerAdapter。

在getItem的{{1}}下，创建片段实例，您将在其中显示视频。视频的播放和暂停/停止功能应在Fragment的FragmentStatePagerAdapter＆amp; onStart生命周期方法

在视图寻呼机内播放视频

1 个答案: