如何使用文件浏览器Android Studio将歌曲添加到我的歌曲播放列表中?

时间:2018-10-02 18:25:51

标签: java android android-studio

嗨,我正在开发音乐播放器,其中一项功能是您必须按下按钮并打开文件浏览器,然后在选择歌曲时,它需要添加到当前播放列表中,但我不知道如何添加。其实我只有路径,却不知道如何将歌曲添加到我的列表中

该应用从原始目录中提取了3首歌曲,当我在文件浏览器中单击另一首歌曲时,需要添加

这是我的代码,文件浏览器工作正常,并提供了文件路径

public void openFile(View view){
new ChooserDialog().with(this)
        .withFilter(false, false, "mp3", "wma", "wav", "jpg")// para agregar mas formatos solo agregar un nuevo elemento despues de "wav" eje: "wav", "mp4" ....
        .withStartFile(Environment.getExternalStorageDirectory().getPath()) // ruta en la que inicia el buscador
        .withChosenListener(new ChooserDialog.Result() {
            @Override
            public void onChoosePath(String path, File pathFile) {

                Toast.makeText(Explorador.this, "FILE: " + path, Toast.LENGTH_SHORT).show();
            }
        })
        .build()
        .show();

}

这是我的变量和onCreate方法

ListView listaCanciones;
List<String> list;
ListAdapter adapter;

MediaPlayer mp;


int posicion = 0;
Button play_pause, btn_repetir;
SeekBar positionBar;
TextView TiempoInicio, TiempoFinal, titulo;
int totalTime;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_explorador);

play_pause = (Button)findViewById(R.id.btnPlay_Pause);
listaCanciones = findViewById(R.id.lv);
TiempoInicio = (TextView)findViewById(R.id.txtTiempoInicio);
TiempoFinal = (TextView)findViewById(R.id.txtTiempoFinal);
titulo = (TextView)findViewById(R.id.txtTitulo);


registerForContextMenu(listaCanciones);

list = new ArrayList<>();

//Agregar a la lista las canciones de la carpeta raw
Field[] fields = R.raw.class.getFields();
for (int i = 0; i < fields.length; i++){
    list.add(fields[i].getName());
}


adapter = new ArrayAdapter<>(this, R.layout.list_view_configuracion, list);
listaCanciones.setAdapter(adapter);

listaCanciones.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
        if(mp != null ){
            mp.stop();
            mp.release();
        }

        int resID = getResources().getIdentifier(list.get(i), "raw", getPackageName());
        mp = MediaPlayer.create(Explorador.this, resID);
        mp.start();
        play_pause.setBackgroundResource(R.drawable.pausa);
        //Toast.makeText(getApplicationContext(), "Reproduciendo", Toast.LENGTH_SHORT).show();

        //Poner el nombre de la cancion
        titulo.setText(listaCanciones.getItemAtPosition(i).toString());



    }
});

}

1 个答案:

答案 0 :(得分:3)

首先创建以下类:

abstract class Song{
    public void play();
    public void stop();
}


class StorageSong extends Song{
    private String pathName; //with getter and setter

    public void stop(){//stop the local storage song file}
    public void play(){//play the local storage song file}
}


class RawSong extends Song{
    private String rawName; //with getter and setter

    public void stop(){//stop the raw song file}
    public void play(){//play the raw song file}
}

现在更改这些行:

Field[] fields = R.raw.class.getFields();
for (int i = 0; i < fields.length; i++){
    list.add(fields[i].getName());
}

对这些人:

Field[] fields = R.raw.class.getFields();
for (int i = 0; i < fields.length; i++){
    list.add(new RawSong(fields[i].getName()));
}

然后,当您要添加本地存储文件时,请执行以下操作:

list.add(new StorageSong(file_path));

并在您的适配器或活动中将列表视为的ArrayList。我的建议清楚吗?有什么问题吗?