Question

在我的应用程序中，我有一个ListView，显示我设置的值（例如联系人列表）。当我点击任何值时，我的应用程序崩溃了。但是在代码中没有OnItemClickListener甚至没有给我一个解决问题的理由。

logcat的：

10-08 20:14:07.453: E/AndroidRuntime(261): FATAL EXCEPTION: main
10-08 20:14:07.453: E/AndroidRuntime(261): java.lang.IllegalStateException: get field slot from row 0 col -1 failed
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.database.CursorWindow.getString_native(Native Method)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.database.CursorWindow.getString(CursorWindow.java:329)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:49)
10-08 20:14:07.453: E/AndroidRuntime(261):  at com.example.mensagem.Mensagenssalvas$1.onItemClick(Mensagenssalvas.java:59)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.widget.AdapterView.performItemClick(AdapterView.java:284)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.widget.ListView.performItemClick(ListView.java:3382)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.os.Handler.handleCallback(Handler.java:587)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.os.Handler.dispatchMessage(Handler.java:92)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.os.Looper.loop(Looper.java:123)
10-08 20:14:07.453: E/AndroidRuntime(261):  at android.app.ActivityThread.main(ActivityThread.java:4627)
10-08 20:14:07.453: E/AndroidRuntime(261):  at java.lang.reflect.Method.invokeNative(Native Method)
10-08 20:14:07.453: E/AndroidRuntime(261):  at java.lang.reflect.Method.invoke(Method.java:521)
10-08 20:14:07.453: E/AndroidRuntime(261):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-08 20:14:07.453: E/AndroidRuntime(261):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-08 20:14:07.453: E/AndroidRuntime(261):  at dalvik.system.NativeStart.main(Native Method)

我的.java代码:(不包含OnItemClickListener）

public class Mensagenssalvas extends Activity {

    public SQLiteDatabase db;

    ArrayList<String> list = null;
    Cursor c;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mensagenssalvas);

    db = openOrCreateDatabase("banco.db", Context.MODE_WORLD_WRITEABLE, null);

    Mensagens();
}

private void Mensagens() {
    // TODO Auto-generated method stub

    ListView user = (ListView) findViewById(R.id.lvMensagens);
    String[] campos = new String[] {"mensagenssalvas", "mensagemsalva"};

    list = new ArrayList<String>();
    c = db.query( "mensagens", campos, null, null, null, null, null);
    c.moveToFirst();
    if(c.getCount() > 0) {
        while(true) {
           list.add(c.getString(c.getColumnIndex("mensagenssalvas")).toString());
            if(!c.moveToNext()) break;
        }
    }

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1, list);

    user.setAdapter(adapter);


   }
 }

如果我的代码中甚至没有OnItemClickListener，为什么会显示错误？

在ListView中的ItemClicked时，应用程序崩溃

0 个答案: