我从 android 开始，我用 ListView 制作了一个应用程序。ListView 的每个元素都有一个不同的 Mediaplayer，当您按下按钮时会播放。
它在模拟器中可以正常工作，但是当我在我的手机（Acer E140）上尝试它时，它只能再现最初可见的元素的声音。当我向下滚动并尝试重现任何其他内容时，应用程序崩溃了。正如我所说，它在模拟器上正常工作。
有任何想法吗？
非常感谢你！
这是代码的相关部分：
public class SoundsActivity extends Activity {
Dialog dialog;
final int DIALOGO_ALERTA=1;
final int DIALOGO_SALIR=2;
final int DIALOGO_NEW=3;
final int DIALOGO=4;
private static final int MNU_OPC1 = 1;
private static final int MNU_OPC2 = 2;
Elem[] datos = new Elem[50];
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
setContentView(R.layout.main);
datos[0]=new Elem ("1.","Rin", MediaPlayer.create(SoundsActivity.this, R.raw.rin));
datos[1]=new Elem ("2.","Shirou", MediaPlayer.create(SoundsActivity.this, R.raw.shirou));
datos[2]=new Elem ("3.","Assasin", MediaPlayer.create(SoundsActivity.this, R.raw.assasin));
datos[3]=new Elem ("4.","Avenger", MediaPlayer.create(SoundsActivity.this, R.raw.avenger));
datos[4]=new Elem ("5.","Rider", MediaPlayer.create(SoundsActivity.this, R.raw.rider));
datos[5]=new Elem ("6.","Berseker", MediaPlayer.create(SoundsActivity.this, R.raw.berseker));
datos[6]=new Elem ("7.","Caster", MediaPlayer.create(SoundsActivity.this, R.raw.caster));
datos[7]=new Elem ("8.","Lancer", MediaPlayer.create(SoundsActivity.this, R.raw.lancer));
datos[8]=new Elem ("9.","Archer", MediaPlayer.create(SoundsActivity.this, R.raw.archer));
datos[9]=new Elem ("10.","Saber", MediaPlayer.create(SoundsActivity.this, R.raw.saber));
SharedPreferences settingss = getSharedPreferences("perfil", MODE_PRIVATE);
String empty = "";
for(int i=0; i<datos.length; i++){
empty= empty+ "F";
}
String info = settingss.getString("save", empty);
salvada(info);
class Adaptador extends ArrayAdapter {
private MediaPlayer mp=null;
Activity context;
Adaptador(Activity context) {
super(context, R.layout.listitem_titular, datos);
this.context = context;
}
public View getView(final int position, View convertView, final ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View item = inflater.inflate(R.layout.listitem_titular, null);
final TextView lblTitulo = (TextView)item.findViewById(R.id.Nombre);
final String nom= datos[position].getNombre();
lblTitulo.setText(nom);
TextView numer = (TextView)item.findViewById(R.id.Number);
final String num= datos[position].getNum();
//numer.setText(num);
String g= "" +position;
numer.setText(g);
final ImageView img = (ImageView)item.findViewById(R.id.tick);
final Button btnn = (Button)item.findViewById(R.id.Check);
final ToggleButton bss = (ToggleButton)item.findViewById(R.id.Play);
if(datos[position].getGuessed()==true){
lblTitulo.setVisibility(View.VISIBLE);
btnn.setVisibility(View.INVISIBLE);
img.setVisibility(View.VISIBLE);
notifyDataSetChanged();
}
bss.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mp!= null && mp.isPlaying()){
mp.pause();
mp.seekTo(0);
}
mp=datos[position].mp;
mp.start();
}
});
btnn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Bundle b = new Bundle();
b.putString("Numero", num);
b.putString("Nombre", nom);
b.putInt("Posicion", position);
showDialog(DIALOGO_ALERTA, b);
}
});
return(item);
}
}
Adaptador adaptador = new Adaptador(this);
ListView lstOpciones = (ListView)findViewById(R.id.LstOpciones);
lstOpciones.setAdapter(adaptador);
}