从设备内部存储播放音频文件。它不断在 void prepare() 上抛出 IOException

Question

我想从用户设备播放存储在我的应用程序内部存储器中的音频文件：下面是提取和显示这些音频文件列表的完整代码=

//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;
                }
            });
        }
    });

每当我点击一个项目时，播放器无法准备播放的吐司一直出现；我觉得setDataSource();没有问题那么我的代码有什么问题。有没有我没有看到的错误？还是我调用MediaPlayer不好？

Answer 1

在你的路径前加上 file:// 这样你的路径就变成了 file:///data/user/0/com.example.mypackagename/files/audio00001.mp3

从设备内部存储播放音频文件。它不断在 void prepare() 上抛出 IOException

Playing audio files from device internal storage. It keeps throwing IOException on void prepare()

android

media-player

android-internal-storage