安卓的onClick沒有找到方法的列表視圖

Question

我有一個xml文件與ImageView與android:onClick="playSound"的propiety的可點擊的元素中，並能正常工作在第一加載列表視圖中我Activity：當我點擊這個ImageView它位於listview的每一行，方法playSound運行。

問題是我在這個Activity的頂部有一個EditText來過濾listview中加載的內容，過濾元素/行，按名稱搜索（如字典）。當我寫的東西，和listview有更少的元素，如果我點擊到任何行的同一ImageView，出現強制關閉例外：NoSuchMethodException: playSound

看來onClick找不到方法playSound的Activity內，但它在那兒。

的Activity

public class ListaCaracteres extends Activity{ 

private Context context; 
private Cursor c; 
private SQLiteDatabase hanyuDB; 
private HanyuSQLHelper hanyuDBHelper; 
private AdapterListaCaracteres adapter; 
private ListView listaCaracteres; 
private EditText buscador; 
private ImageView play; 
private MediaPlayer mediaPlayer; 
private String texto = null; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(es.hsk.ap.R.layout.lista_caracteres); 

    /* 
    * Query a la base de datos, obtenemos todos los lugares en Cursor 
    */ 
    try{ 
     hanyuDBHelper = new HanyuSQLHelper(this); 
     hanyuDB = hanyuDBHelper.getReadableDatabase(); 
     c = hanyuDB.rawQuery(" SELECT * FROM Caracteres ", null); 
    } 
    catch(SQLiteException ex) 
    { 
     Toast mensajeError=Toast.makeText(getApplicationContext(), "Error accediendo a los datos", Toast.LENGTH_SHORT); 
     mensajeError.show(); 
     Log.e("LogLugares", "Error en getReadableDatabase()", ex); 
    }  


    /* 
    * Utilizamos nuestro Adapter AdapterListaCaracteres con el contenido del Cursor 
    */ 
    adapter = new AdapterListaCaracteres(this,c, true); 
    listaCaracteres = (ListView)findViewById(es.hsk.ap.R.id.listaCaracteres); 
    listaCaracteres.setAdapter(adapter);  

    /* 
    * Localizamos y damos funciona al buscador 
    */ 
    buscador = (EditText)findViewById(R.id.buscador); 

    buscador.setOnKeyListener(new OnKeyListener() { 

     @Override 
     public boolean onKey(View v, int keyCode, KeyEvent event) { 
      // TODO Auto-generated method stub 
      texto = buscador.getText().toString(); 

      c = hanyuDB.rawQuery(
        " SELECT * FROM Caracteres WHERE significado LIKE '%" 
          + texto + "%'", null); 

      AdapterListaCaracteres adapter2 = new AdapterListaCaracteres(getApplicationContext(), c, false); 
      listaCaracteres.setAdapter(adapter2); 

      return false; 
     } 
    }); 

    /* 
    * Ponemos acción al clic sobre un elemento del listview 
    */ 
    listaCaracteres.setOnItemClickListener(new OnItemClickListener(){ 
     public void onItemClick(AdapterView<?> parent, View view, int position, long id){ 

      /* 
      * Al hacer clic se inicia activity MostrarCaracter 
      * El Intent enviado lleva como parámetro el id del objeto a mostrar 
      */ 
      if(texto!=null){ 
       c = hanyuDB.rawQuery(
         " SELECT * FROM Caracteres WHERE significado LIKE '%" 
           + texto + "%'", null); 
       c.moveToPosition(position); 
       position=c.getInt(0)-1; 
      } 


      Intent intent=new Intent(); 
      intent.setClass(getApplicationContext(), MostrarCaracter.class);      

      intent.putExtra("idObjeto", position); 
      startActivity(intent); 
     } 
    }); 
} 


/* 
* Método para reproducir sonido de carácter 
*/ 
public void playSound(View view){ 
    int posicion=listaCaracteres.getPositionForView(view); 
    if(texto!=null){ 
     c = hanyuDB.rawQuery(
       " SELECT * FROM Caracteres WHERE significado LIKE '%" 
         + texto + "%'", null); 
     c.moveToPosition(posicion); 
     posicion=c.getInt(0)-1; 
    } 

    c = hanyuDB.rawQuery(" SELECT audio FROM Caracteres WHERE _id="+(posicion+1), null); 
    c.moveToFirst(); 
    String audio=c.getString(0); 
    int resID = getResources().getIdentifier(audio, "raw", "es.hsk.ap"); 
    mediaPlayer = MediaPlayer.create(this, resID); 
    mediaPlayer.start(); 
} 

在我的適配器xml膨脹的文件，誰擁有ImageView (id play)是可以點擊的，與onClick行動

<TableRow 
    android:id="@+id/tableRow1" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:paddingTop="5dp" > 

<TextView 
    android:id="@+id/caracter" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center_horizontal" 
    android:paddingLeft="5dp" 
    android:paddingRight="15dp" 
    android:paddingBottom="5dp" 
    android:textSize="28dp" /> 

<TextView 
    android:id="@+id/pinyin" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textSize="24dp" /> 

<LinearLayout 
    android:id="@+id/linearLayout1" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical" 
    android:gravity="right" > 

    <ImageView 
     android:id="@+id/play" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:contentDescription="@string/icono" 
     android:paddingRight="7dp" 
     android:onClick="playSound" 
     android:src="@drawable/speaker" /> 
</LinearLayout> 

</TableRow> 

<TableRow 
    android:id="@+id/tableRow2" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:paddingBottom="5dp" > 

<TextView 
    android:id="@+id/significado" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:paddingLeft="5dp" 
    android:textSize="16dp" /> 

</TableRow> 

的logcat：

04-04 21:36:07.144: E/AndroidRuntime(5569): Uncaught handler: thread main exiting due to uncaught exception 
04-04 21:36:07.164: E/AndroidRuntime(5569): java.lang.IllegalStateException: Could not find a method reproducir(View) in the activity 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.View$1.onClick(View.java:2020) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.View.performClick(View.java:2364) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.View.onTouchEvent(View.java:4179) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.View.dispatchTouchEvent(View.java:3709) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.app.Activity.dispatchTouchEvent(Activity.java:2061) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1691) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.os.Looper.loop(Looper.java:123) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.app.ActivityThread.main(ActivityThread.java:4363) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at java.lang.reflect.Method.invoke(Method.java:521) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at dalvik.system.NativeStart.main(Native Method) 
04-04 21:36:07.164: E/AndroidRuntime(5569): Caused by: java.lang.NoSuchMethodException: reproducir 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at java.lang.ClassCache.findMethodByName(ClassCache.java:308) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at java.lang.Class.getMethod(Class.java:1014) 
04-04 21:36:07.164: E/AndroidRuntime(5569):  at android.view.View$1.onClick(View.java:2017) 

我的自定義適配器：

public class AdapterListaCaracteres extends CursorAdapter{ 

private Context mContext; 
private Cursor datos; 
private boolean aRequery; 
private LayoutInflater inflater; 

/* 
* Constructor de la clase 
*/ 
public AdapterListaCaracteres(Context context, Cursor c, boolean autoRequery){ 
    super(context, c, autoRequery); 
    this.mContext = context; 
    this.datos = c; 
    this.aRequery=autoRequery; 
} 

public void reproducir(View view){ 
} 

/* 
* Métodos 
*/ 
@Override 
public int getCount() { 
    // TODO Auto-generated method stub 
    return datos.getCount(); 
} 

@Override 
public Object getItem(int position) { 
    // TODO Auto-generated method stub 
    return datos.getString(position); 
} 

@Override 
public long getItemId(int position) { 
    // TODO Auto-generated method stub 
    return 0; 
} 

public View getView(int position, View convertView, ViewGroup parent) { 
    // TODO Auto-generated method stub 

    View item = convertView; 
    ViewHolder holder; 

    inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    datos.moveToPosition(position); 

    //Comprobamos si el item existe para reaprovecharlo 
    if(item==null){ 
     try{ 
      item = inflater.inflate(es.hsk.ap.R.layout.caracter, null); 
     } 
     catch(InflateException ex) 
     { 
      // lo que querais hacer en este caso,mostrar un toast o lo que sea 
     } 


     holder = new ViewHolder(); 
     holder.caracter = (TextView)item.findViewById(es.hsk.ap.R.id.caracter); 
     holder.pinyin = (TextView)item.findViewById(es.hsk.ap.R.id.pinyin); 
     holder.significado = (TextView)item.findViewById(es.hsk.ap.R.id.significado); 
     holder.audio = (ImageView)item.findViewById(es.hsk.ap.R.id.play); 

     item.setTag(holder); 
    } 
    else{ 
     holder = (ViewHolder)item.getTag(); 
    }   

    holder.caracter.setText(datos.getString(2));    
    holder.pinyin.setText(datos.getString(3)); 
    holder.significado.setText(datos.getString(4)); 

    return item; 

} 



/* 
* Utilizamos clase ViewHolder para obtener IDs de objetos View inflados anteriormente 
* (objetos hijos del objeto convertView) y así reparovecharlos para ahorrar recursos 
* y batería al hacer scroll. Se localizan mediante la propiedad Tag 
*/ 
static class ViewHolder{ 
    TextView caracter; 
    TextView pinyin; 
    TextView significado; 
    ImageView audio; 
} 



@Override 
public void bindView(View view, Context context, Cursor cursor) { 
    // TODO Auto-generated method stub 

} 

@Override 
public View newView(Context context, Cursor cursor, ViewGroup parent) { 
    // TODO Auto-generated method stub 
    return null; 
} 

}

Answer 1

的onClick將尋找在Context實例的方法。確保用於擴充ListView項目的上下文是您的活動。