IllegalStateException：无法从cursorWindow读取第0行，col -1。我是新手android我看了smiller问题确实解决了我的问题帮助请提前致谢。
这里是我的代码：
// function to add data in to db
public void CreatExpenses(View view)
{
mCategory = (Spinner )findViewById(R.id.spCategory);
EditText edittext2 = (EditText )findViewById(R.id.AmountEditText);
EditText edittext3 = (EditText )findViewById(R.id.PayTypeEditText);
EditText edittext4 = (EditText )findViewById(R.id.DateEditText);
category =mCategory.getSelectedItem().toString();
Amount =edittext2.getText().toString();
PaymentType =edittext3.getText().toString();
Date =edittext4.getText().toString();
db.execSQL("INSERT INTO Expenses VALUES('"+category+"','"+Amount+"','"+PaymentType+"','"+Date+"');");
Toast.makeText(getBaseContext(),
"Your info is saved successfully!",
Toast.LENGTH_SHORT).show();
}
public void ShowExpens(View view)
{
Cursor c=db.rawQuery("SELECT * from Expenses", null);
int count= c.getCount();
c.moveToFirst();
TableLayout tableLayout = new TableLayout(getApplicationContext());
tableLayout.setVerticalScrollBarEnabled(true);
TableRow tableRow;
TextView textView,textView1,textView2,textView3,textView4,textView5,textView6;
tableRow = new TableRow(getApplicationContext());
textView=new TextView(getApplicationContext());
textView.setText("Expense_Category");
textView.setTextColor(Color.RED);
textView.setTypeface(null, Typeface.BOLD);
textView.setPadding(20, 20, 20, 20);
tableRow.addView(textView);
textView4=new TextView(getApplicationContext());
textView4.setText("Amount");
textView4.setTextColor(Color.GREEN);
textView4.setTypeface(null, Typeface.BOLD);
textView4.setPadding(20, 20, 20, 20);
tableRow.addView(textView4);
textView5=new TextView(getApplicationContext());
textView5.setText("PaymentType");
textView5.setTextColor(Color.RED);
textView5.setTypeface(null, Typeface.BOLD);
textView5.setPadding(20, 20, 20, 20);
tableRow.addView(textView5);
textView6 = new TextView(getApplicationContext());
textView6.setText("Date");
textView6.setTextColor(Color.RED);
textView6.setTypeface(null, Typeface.BOLD);
textView6.setPadding(20, 20, 20, 20);
tableRow.addView(textView6);
tableLayout.addView(tableRow);
for (Integer j = 0; j < count; j++)
{
tableRow = new TableRow(getApplicationContext());
textView1 = new TextView(getApplicationContext());
textView1.setText(c.getString(c.getColumnIndex("Expense_Category ")));
textView2 = new TextView(getApplicationContext());
textView2.setText(c.getString(c.getColumnIndex("Amount")));
textView3 = new TextView(getApplicationContext());
textView3.setText(c.getString(c.getColumnIndex("PaymentType")));
textView4 = new TextView(getApplicationContext());
textView4.setText(c.getString(c.getColumnIndex("Date")));
textView1.setPadding(20, 20, 20, 20);
textView2.setPadding(20, 20, 20, 20);
textView3.setPadding(20, 20, 20, 20);
textView4.setPadding(20, 20, 20, 20);
tableRow.addView(textView1);
tableRow.addView(textView2);
tableRow.addView(textView3);
tableRow.addView(textView4);
tableLayout.addView(tableRow);
c.moveToNext() ;
}
setContentView(tableLayout);
db.close();
}
public void close(View view)
{
System.exit(0);
}
}
这是LogCat
11-12 09:50:01.978: E/CursorWindow(871): Failed to read row 0, column -1 from a CursorWindow which has 1 rows, 4 columns.
11-12 09:50:01.988: D/AndroidRuntime(871): Shutting down VM
11-12 09:50:01.988: W/dalvikvm(871): threadid=1: thread exiting with uncaught exception (group=0x41465700)
11-12 09:50:02.148: E/AndroidRuntime(871): FATAL EXCEPTION: main
11-12 09:50:02.148: E/AndroidRuntime(871): java.lang.IllegalStateException: Could not execute method of the activity
11-12 09:50:02.148: E/AndroidRuntime(871): at android.view.View$1.onClick(View.java:3633)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.view.View.performClick(View.java:4240)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.view.View$PerformClick.run(View.java:17721)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.os.Handler.handleCallback(Handler.java:730)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.os.Handler.dispatchMessage(Handler.java:92)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.os.Looper.loop(Looper.java:137)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.app.ActivityThread.main(ActivityThread.java:5103)
11-12 09:50:02.148: E/AndroidRuntime(871): at java.lang.reflect.Method.invokeNative(Native Method)
11-12 09:50:02.148: E/AndroidRuntime(871): at java.lang.reflect.Method.invoke(Method.java:525)
11-12 09:50:02.148: E/AndroidRuntime(871): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-12 09:50:02.148: E/AndroidRuntime(871): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-12 09:50:02.148: E/AndroidRuntime(871): at dalvik.system.NativeStart.main(Native Method)
11-12 09:50:02.148: E/AndroidRuntime(871): Caused by: java.lang.reflect.InvocationTargetException
11-12 09:50:02.148: E/AndroidRuntime(871): at java.lang.reflect.Method.invokeNative(Native Method)
11-12 09:50:02.148: E/AndroidRuntime(871): at java.lang.reflect.Method.invoke(Method.java:525)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.view.View$1.onClick(View.java:3628)
11-12 09:50:02.148: E/AndroidRuntime(871): ... 11 more
11-12 09:50:02.148: E/AndroidRuntime(871): Caused by: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
11-12 09:50:02.148: E/AndroidRuntime(871): at android.database.CursorWindow.nativeGetString(Native Method)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.database.CursorWindow.getString(CursorWindow.java:434)
11-12 09:50:02.148: E/AndroidRuntime(871): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
11-12 09:50:02.148: E/AndroidRuntime(871): at com.info.househouldexpcalulator.MainActivity.ShowExpens(MainActivity.java:113)
11-12 09:50:02.148: E/AndroidRuntime(871): ... 14 more
11-12 09:50:02.308: D/dalvikvm(871): GC_FOR_ALLOC freed 178K, 8% free 2841K/3076K, paused 54ms, total 89ms
答案 0 :(得分：0)
您提供的列名称不存在。
getColumnIndex(String columnName)
返回给定列名的从零开始的索引，如果列不存在，则返回-1。
错误在于代码的以下任何部分：
c.getString(c.getColumnIndex("Expense_Category ")); //notice the space after Expense_Category
c.getString(c.getColumnIndex("Amount"));
c.getString(c.getColumnIndex("PaymentType"));
c.getString(c.getColumnIndex("Date"));
如果您希望该列存在 改为使用getColumnIndexOrThrow（String），这将使错误更加清晰。