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I want to play audio files which are stored on internal storage of my application from a user device: here below are the full code of extracting and showing list of those audio files=

//variables of retrieving audio file from internal storage
ListView listView_phone_calls;
ArrayList<File> phone_call_list;
ArrayAdapter<File> adapter;

//variables of playing an audio file
MediaPlayer player;

    listView_phone_calls=(ListView)findViewById(R.id.listView_phone_calls);
    phone_call_list=new ArrayList<>();

    File[] file=getApplicationContext().getFilesDir().listFiles();
    for (int i=0;i<file.length;i++){
        phone_call_list.add(file[i]);
    }

    adapter=new ArrayAdapter<>(PhoneCall_Player.this,android.R.layout.simple_list_item_activated_1,phone_call_list);
    listView_phone_calls.setAdapter(adapter);

    listView_phone_calls.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            //This is what should happen when a user clicks on a one item
            player=new MediaPlayer();
            File call_rec=(File) listView_phone_calls.getItemAtPosition(position);
            try {
                player.setDataSource(String.valueOf(call_rec));
            } catch (IOException e) {
                e.printStackTrace();
                Toast.makeText(PhoneCall_Player.this,"Sorry! File not found! "+e.getMessage(),Toast.LENGTH_SHORT).show();
            }catch (IllegalArgumentException e){
                e.printStackTrace();
                Toast.makeText(PhoneCall_Player.this,"Sorry! Something is wrong!, "+e.getMessage(),Toast.LENGTH_SHORT).show();
            }

            player.setAudioStreamType(AudioManager.STREAM_MUSIC);

            try {
                player.prepare();
            } catch (IOException e) {
                e.printStackTrace();
                Toast.makeText(PhoneCall_Player.this,"Player couldn't be prepared to play! "+e.getMessage(),Toast.LENGTH_SHORT).show();
            }
            player.start();

            player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    player.release();
                    player=null;
                }
            });
        }
    });

Whenever I click on an item, the toast of player couldn't be prepared to play keeps appearing; I think there is no problem with setDataSource(); so what is wrong with my codes. Is there any error that I am putting that I don't see? Or I am not calling MediaPlayer well?

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1 回答 1

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为您的路径添加前缀，file://以便您的路径变为file:///data/user/0/com.example.mypackagename/files/audio00001.mp3

于 2018-05-20T11:38:22.510 回答