/**  * 從本地的sdcard得到數(shù)據(jù)  * //1.遍歷sdcard,后綴名  * //2.從內(nèi)容提供者里面獲取視頻  * //3.如果是6.0的系統(tǒng)，動態(tài)獲取讀取sdcard的權(quán)限  */ private void getDataFromLocal() {  new Thread(){   @Override   public void run() {    super.run();//    isGrantExternalRW((Activity) context);//    SystemClock.sleep(2000);    mediaItems = new ArrayList<>();    ContentResolver resolver = context.getContentResolver();    Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;    String[] objs = {      MediaStore.Video.Media.DISPLAY_NAME,//視頻文件在sdcard的名稱      MediaStore.Video.Media.DURATION,//視頻總時長      MediaStore.Video.Media.SIZE,//視頻的文件大小      MediaStore.Video.Media.DATA,//視頻的絕對地址      MediaStore.Video.Media.ARTIST,//歌曲的演唱者    };    Cursor cursor = resolver.query(uri, objs, null, null, null);    if(cursor != null){     while (cursor.moveToNext()){      MediaItem mediaItem = new MediaItem();      mediaItems.add(mediaItem);//寫在上面      String name = cursor.getString(0);//視頻的名稱      mediaItem.setName(name);      long duration = cursor.getLong(1);//視頻的時長      mediaItem.setDuration(duration);      long size = cursor.getLong(2);//視頻的文件大小      mediaItem.setSize(size);      String data = cursor.getString(3);//視頻的播放地址      mediaItem.setData(data);      String artist = cursor.getString(4);//藝術(shù)家      mediaItem.setArtist(artist);     }     cursor.close();    }    //Handler發(fā)消息    handler.sendEmptyMessage(10);   }  }.start(); } /**  * 解決安卓6.0以上版本不能讀取外部存儲權(quán)限的問題  * @param activity  * @return  */ public static boolean isGrantExternalRW(Activity activity) {  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && activity.checkSelfPermission(    Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {   activity.requestPermissions(new String[]{     Manifest.permission.READ_EXTERNAL_STORAGE,     Manifest.permission.WRITE_EXTERNAL_STORAGE   }, 1);   return false;  }  return true; }