我得到異常，不知道爲什麼

這就是我現在做的事：我得到異常，不知道爲什麼

public class AndroidTestToSpeechActivity extends Activity implements 
     TextToSpeech.OnInitListener { 
    /** Called when the activity is first created. */ 

    private TextToSpeech tts; 
    private Button btnSpeak; 
    private EditText txtText; 
    private ArrayList<String> itemsList; 
    private Spinner spinner; 
    private String contry_name; 
    private ArrayAdapter<String> dataAdapter; 
    private TextView textview; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     Log.i("----------",Arrays.toString(Locale.getAvailableLocales())); 
     itemsList = new ArrayList<String>(); 
     itemsList.add(Arrays.toString(Locale.getAvailableLocales())); 
     spinner = (Spinner)findViewById(R.id.spinner1); 
     spinner.setOnItemSelectedListener((OnItemSelectedListener) this); 
     dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,itemsList); 
     dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spinner.setAdapter(dataAdapter); 
     textview = (TextView)findViewById(R.id.textView1); 

     tts = new TextToSpeech(this, this); 
     btnSpeak = (Button) findViewById(R.id.btnSpeak); 
     txtText = (EditText) findViewById(R.id.txtText); 

     // button on click event 
     btnSpeak.setOnClickListener(new View.OnClickListener() { 

      public void onClick(View arg0) { 
       speakOut(); 
      } 

     }); 
    } 

    @Override 
    public void onDestroy() { 
     // Don't forget to shutdown tts! 
     if (tts != null) { 
      tts.stop(); 
      tts.shutdown(); 
     } 
     super.onDestroy(); 
    } 

    public void onInit(int status) { 

     if (status == TextToSpeech.SUCCESS) { 

      int result = tts.setLanguage(Locale.ENGLISH); 

      if (result == TextToSpeech.LANG_MISSING_DATA 
        || result == TextToSpeech.LANG_NOT_SUPPORTED) { 
       Log.e("TTS", "This Language is not supported"); 
      } else { 
       btnSpeak.setEnabled(true); 
       speakOut(); 

      } 

     } else { 
      Log.e("TTS", "Initilization Failed!"); 
     } 

    } 

    private void speakOut() { 

     String text = txtText.getText().toString(); 
     tts.speak(text, TextToSpeech.QUEUE_FLUSH, null); 
    } 

    public void onItemSelected(AdapterView<?> parent, View v, int position, long id) { 

     textview.setText(itemsList.get(position)); 
    } 



}

我枕着logcat的，但我不明白什麼是錯的。我添加了textView和textView1之後纔開始拋出異常，但我找不出問題所在。

這是從logcat的誤差：

06-07 00:12:58.119: E/AndroidRuntime(12887): FATAL EXCEPTION: main 
06-07 00:12:58.119: E/AndroidRuntime(12887): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.testotspeech/com.testotspeech.AndroidTestToSpeechActivity}: java.lang.ClassCastException: com.testotspeech.AndroidTestToSpeechActivity 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2787) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2803) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.app.ActivityThread.access$2300(ActivityThread.java:135) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2136) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.os.Handler.dispatchMessage(Handler.java:99) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.os.Looper.loop(Looper.java:144) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.app.ActivityThread.main(ActivityThread.java:4937) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at java.lang.reflect.Method.invokeNative(Native Method) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at java.lang.reflect.Method.invoke(Method.java:521) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at dalvik.system.NativeStart.main(Native Method) 
06-07 00:12:58.119: E/AndroidRuntime(12887): Caused by: java.lang.ClassCastException: com.testotspeech.AndroidTestToSpeechActivity 
06-07 00:12:58.119: E/AndroidRuntime(12887): at com.testotspeech.AndroidTestToSpeechActivity.onCreate(AndroidTestToSpeechActivity.java:41) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1069) 
06-07 00:12:58.119: E/AndroidRuntime(12887): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2751) 
06-07 00:12:58.119: E/AndroidRuntime(12887): ... 11 more

來源

2012-06-06 user1434011

41行：spinner.setOnItemSelectedListener((OnItemSelectedListener) this);
在該線，您將您當前的活動（this）設置爲OnItemSelectedListener給微調器，但您的活動未執行NT界面。

來源

2012-06-06 21:23:39 thomasg

spinner.setOnItemSelectedListener（（OnItemSelectedListener）this）;對，我只是現在使用調試，發現有例外。我該怎麼辦？如果我刪除「this」，那麼即使在（）中的OnItemSelectedListener出現錯誤， – user1434011

改變這一行：textview.setText(itemsList<position>);
成：textview.setText(itemsList.get(position));
這裏是DOC：ArrayList.get(...)

來源

2012-06-06 21:03:19 thomasg

我改變了沒有錯誤，但當即時通訊運行應用程序即時獲取異常。我不知道是什麼問題。現在只有當我添加這個textView時纔會出現異常。我將用例外編輯我的問題。 – user1434011

我得到異常，不知道爲什麼

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