如何在andorid中获取所有视频文件

问题描述

我正在尝试访问手机上的所有视频 onRefresh() 但手机管理器中新添加的视频没有添加到应用程序的 recylerview 中。 OnRefresh()，显示相同的旧视频。这是过程

swipeRefreshLayout.setonRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                getVideos(this);
              }

        });
 
 @RequiresApi(api = Build.VERSION_CODES.Q)
    public List<Items> getVidoes(@NotNull Context context){
        List<Items> tempVideos = new ArrayList<>();
        Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
        String [] projection = {
                MediaStore.Video.Media._ID,MediaStore.Video.Media.DATA,MediaStore.Video.Media.TITLE,};
        Cursor cursor = context.getContentResolver().query(uri,projection,null,null);
        if (cursor != null){
            while (cursor.movetoNext()){
                String id = cursor.getString(0);
                String path = cursor.getString(1);
                String title = cursor.getString(2);

                Items items= new Items(id,path,title);
                
                tempVideos.add(videoFiles);
            }
            cursor.close();
        }
        return tempVideos;

    myAdapter = new MyAdapter(getActivity(),items);
    recyclerView.setLayoutManager(new linearlayoutmanager(getContext(),RecyclerView.VERTICAL,false));

    recyclerView.setAdapter(myAdapter);

    }

我不知道它为什么会这样。感谢您的任何建议。

解决方法

请尝试以下方式使用 Asynchtask doinbackground 并在 onpostexecute 的 recycleview 上显示列表

private String PROJECTION = String(
                    MediaStore.Files.FileColumns._ID,MediaStore.MediaColumns.DATA,MediaStore.MediaColumns.MIME_TYPE,MediaStore.MediaColumns.WIDTH,MediaStore.MediaColumns.HEIGHT,DURATION
            );


            Cursor cursor = context.getContentResolver().query(uri,PROJECTION,null,null);
            if (cursor != null){
                while (cursor.moveToNext()){
                    long id = cursor.getLong(cursor.getColumnIndexOrThrow(PROJECTION[0]));
                    String path = ""
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                        String uri = QUERY_URI.buildUpon().appendPath(id.toString()).build().toString()
                        String filePathColumn[] = arrayOf(MediaStore.MediaColumns.DATA);
                        Cursor pathCursor = contentResolver.query(
                                Uri.parse(uri),filePathColumn,null
                        );
                        pathCursor.moveToFirst();
                        int columnIndex = pathCursor?.getColumnIndex(filePathColumn[0]) ?: 0 ;
                        path = pathCursor?.getString(columnIndex) ?: "" ;
                        pathCursor.close();
                    } else {
                        path = cursor.getString(cursor.getColumnIndexOrThrow(PROJECTION[1]));
                    }
                    String pictureType =
                            cursor.getString(cursor.getColumnIndexOrThrow(PROJECTION[2]))
                    int duration =
                            cursor.getInt(cursor.getColumnIndexOrThrow(PROJECTION[5]))
                    int width =
                            cursor.getInt(cursor.getColumnIndexOrThrow(PROJECTION[3]))
                    int height =
                            cursor.getInt(cursor.getColumnIndexOrThrow(PROJECTION[4]))
                    Item item = Item(0,path,pictureType,width,height)
                    list.add(item)
                }
                cursor.close();
            }

希望能帮到你