Java Android中的非法状态例外？

我的活动中有微调器和列表视图

我正在从中的SQLite数据库表中检索平均值为的所有列 我的列表视图

我在原始查询中使用了带有GROUPBY子句的average函数

当我运行应用程序时，我的应用程序崩溃

我收到空指针异常：

Bad request for field slot 0,-1. numRows = 1, numColumns = 6 and java.lang.IllegalStateException: get field slot from row 0 col -1 failed.

谁能帮帮我吗。提前谢谢

这是我的活动代码

public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.performance_details);
        databaseHelper = new DatabaseHelper(this);
        databaseHelper.onOpen(db);

        spinneEmployeeName = (Spinner)findViewById(R.id.spinnerPerformance_EmployeeName);
        loadSerachEmpName();
        spinneEmployeeName.setOnItemSelectedListener(new OnItemSelectedListener()
        {

            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
                // TODO Auto-generated method stub
                selectedEmployeeName = spinneEmployeeName.getSelectedItem().toString().trim();
                System.out.println("selectedEmployeeName " + selectedEmployeeName);

                String[] separated = selectedEmployeeName.split(" ");
                strSeparated_Id = separated[0].trim();
                Log.e("strSeparated_Id  = ",""+strSeparated_Id);
                System.out.println("strSeparated_Id  = " +strSeparated_Id);

                strSeparated_EmpName = separated[1].trim();
                Log.e("strSeparated_EmpName  = ",""+strSeparated_EmpName);
                System.out.println("strSeparated_EmpName = " +strSeparated_EmpName);


                 showPerformanceDetails();


            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
                // TODO Auto-generated method stub

            }
        });

}

    private void showPerformanceDetails()
    {
         list_PerformanceDetails = (ListView)findViewById(R.id.list_PerformanceDetails);

        ArrayList<Performance_Pojo> Performance_PojoList = new ArrayList<Performance_Pojo>();  
        Performance_PojoList.clear();   

        SQLiteDatabase sqlDatabase = databaseHelper.getWritableDatabase();
        Log.e("strSeparated_Id  = ",""+strSeparated_Id);
        Log.d("Tag", strSeparated_Id);
        Cursor cursor = sqlDatabase.rawQuery("SELECT performance_month, AVG(performance_rate_one),  AVG(performance_rate_two),  AVG(performance_rate_three),  AVG(performance_rate_four),  AVG(performance_rate_five)  FROM performance where "+ "Emp_id" + " = ? " 
                +" GROUP BY performance_month",new String[]{String.valueOf(strSeparated_Id)});

        if (cursor != null && cursor.getCount() != 0) 
        { 
            if (cursor.moveToFirst())
            {
                do
                {
                    Performance_Pojo Performance_PojoListItems = new Performance_Pojo();  

                    Performance_PojoListItems.set_strPerformanceMonth(cursor.getString(cursor.getColumnIndex("performance_month")));
                    Performance_PojoListItems.set_strPerformance_rate_one(cursor.getString(cursor.getColumnIndex("performance_rate_one")));
                    Performance_PojoListItems.set_strPerformance_rate_two(cursor.getString(cursor.getColumnIndex("performance_rate_two")));
                    Performance_PojoListItems.set_strPerformance_rate_three(cursor.getString(cursor.getColumnIndex("performance_rate_three")));
                    Performance_PojoListItems.set_strPerformance_rate_four(cursor.getString(cursor.getColumnIndex("performance_rate_four")));
                    Performance_PojoListItems.set_strPerformance_rate_five(cursor.getString(cursor.getColumnIndex("performance_rate_five")));

                    Performance_PojoList.add(Performance_PojoListItems);     

                }while (cursor.moveToNext());   
            }
            sqlDatabase.close();
            cursor.close();
        }



        PerformanceList_Adapter performanceList_Adapter = new PerformanceList_Adapter(Performance_Details.this, Performance_PojoList); 
        list_PerformanceDetails.setAdapter(performanceList_Adapter);


    }

这是我的日志猫错误信息

07-01 16:43:31.746: E/CursorWindow(15747): Bad request for field slot 0,-1. numRows = 1, numColumns = 6
07-01 16:43:31.746: D/AndroidRuntime(15747): Shutting down VM
07-01 16:43:31.746: W/dalvikvm(15747): threadid=1: thread exiting with uncaught exception (group=0x40015560)
07-01 16:43:31.766: E/AndroidRuntime(15747): FATAL EXCEPTION: main
07-01 16:43:31.766: E/AndroidRuntime(15747): java.lang.IllegalStateException: get field slot from row 0 col -1 failed
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.database.CursorWindow.getString_native(Native Method)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.database.CursorWindow.getString(CursorWindow.java:329)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:49)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.sqlitedemo.Performance_Details.showPerformanceDetails(Performance_Details.java:92)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.sqlitedemo.Performance_Details.access$0(Performance_Details.java:70)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.sqlitedemo.Performance_Details$1.onItemSelected(Performance_Details.java:56)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.widget.AdapterView.fireOnSelected(AdapterView.java:871)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.widget.AdapterView.access$200(AdapterView.java:42)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:837)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.os.Handler.handleCallback(Handler.java:587)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.os.Handler.dispatchMessage(Handler.java:92)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.os.Looper.loop(Looper.java:123)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.app.ActivityThread.main(ActivityThread.java:3683)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at java.lang.reflect.Method.invokeNative(Native Method)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at java.lang.reflect.Method.invoke(Method.java:507)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at dalvik.system.NativeStart.main(Native Method)

---

发生这种情况是因为您正在获取值

AVG（performance\u rate\u one）

并在搜索名为

performance\u rate\u one

的列时。因此getColumnIndex将返回-1，因此您将得到错误

在查询中使用

别名

，或者在获取时将列名用作

AVG（performance\u rate\u one）

编辑

例如：如果在查询中选择字段作为

AVG（performance\u rate\u one）作为col1

然后在获取时，您应该编写

cursor.g‌​etColumnIndex（“col1”）

---

希望这有帮助。

是否有与您的sqlite查询条件相匹配的记录？我使用别名来列，但仍然得到java.lang.IllegalStateException的相同错误：从第0行获取字段槽col-1失败您使用了什么别名？例如=Cursor Cursor=sqlDatabase.rawQuery（“选择性能\月，平均性能\费率\一）作为col1，平均（performance_rate_two）作为col2，AVG（performance_rate_two）作为col3，AVG（performance_rate_two）作为col4，AVG（performance_rate_two）作为col5，其中“+”Emp_id“+”=？“+”按性能分组“月”，新字符串[]{String.valueOf（stresparated_id）}）；以及获取部分，请在代码行=Performance_PojoListItems.set_strPerformanceMonth（cursor.getString（cursor.getColumnIndex（“Performance_month”））处获取相同的错误和异常；

  Performance_PojoListItems.set_strPerformance_rate_one(cursor.getString(cursor.getColumnIndex("performance_rate_one")));

07-01 16:43:31.746: E/CursorWindow(15747): Bad request for field slot 0,-1. numRows = 1, numColumns = 6
07-01 16:43:31.746: D/AndroidRuntime(15747): Shutting down VM
07-01 16:43:31.746: W/dalvikvm(15747): threadid=1: thread exiting with uncaught exception (group=0x40015560)
07-01 16:43:31.766: E/AndroidRuntime(15747): FATAL EXCEPTION: main
07-01 16:43:31.766: E/AndroidRuntime(15747): java.lang.IllegalStateException: get field slot from row 0 col -1 failed
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.database.CursorWindow.getString_native(Native Method)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.database.CursorWindow.getString(CursorWindow.java:329)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:49)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.sqlitedemo.Performance_Details.showPerformanceDetails(Performance_Details.java:92)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.sqlitedemo.Performance_Details.access$0(Performance_Details.java:70)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.sqlitedemo.Performance_Details$1.onItemSelected(Performance_Details.java:56)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.widget.AdapterView.fireOnSelected(AdapterView.java:871)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.widget.AdapterView.access$200(AdapterView.java:42)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:837)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.os.Handler.handleCallback(Handler.java:587)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.os.Handler.dispatchMessage(Handler.java:92)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.os.Looper.loop(Looper.java:123)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at android.app.ActivityThread.main(ActivityThread.java:3683)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at java.lang.reflect.Method.invokeNative(Native Method)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at java.lang.reflect.Method.invoke(Method.java:507)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-01 16:43:31.766: E/AndroidRuntime(15747):    at dalvik.system.NativeStart.main(Native Method)