Clever Geek Handbook

MediaRetriever for an executor returning null

artist is only gettiing initialized value but not artistextracted using PLZ metadata suggest me wath wrong i am doing

 Strng artist="";
        void onCreate(){
            metaRetriver1 = new MediaMetadataRetriever();
            metaRetriver1.setDataSource("/storage/sdcard0/Tu+Jo+Hain.mp3");

            artist=metaRetriver1.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST);

        }
+3


source to share


2 answers


listFiles

returns null

if file is not a directory or an I / O error occurs, so you should check for possible nulls.

Environment.getExternalStorageDirectory () already returns the path to your external storage directory. Therefore, instead of

 String root_sd = Environment.getExternalStorageDirectory().toString();
 file = new File( root_sd + "/external_sd" ) ;       
 File list[] = file.listFiles();


you can just

File list[] = Environment.getExternalStorageDirectory().listFiles();

remember from api level 19 you must add READ_EXTERNAL_STORAGE to your AndroidManifest.xml file

+1


source


add null check to your list

if(list!=null){
            for (int i = 0; i < list.length; i++) {
                myList.add(list[i].getName());
            }
        }


also check if the directory you are getting the files from exists.

+1


source






More articles:


All Articles