mardi 17 février 2015

Getting Data from Cursor

What I need to do is get the Points for a certain User in a certain Shop, I run this;



Cursor cursor1 = myDB.checkPointss(email, name);
String one = cursor1.getString(cursor1.getColumnIndex("POINTS"));

scanText.setText("barcode resueeeelt " + one);


This is the Method;



public Cursor checkPointss(String email, String name) {
Cursor c = db.rawQuery("SELECT * FROM compdata WHERE EMAIL= ? AND NAME=?", new String[] {email, name});
if (c != null) {
c.moveToFirst();
}
return c;

}


Everytime I try Login to the page, it crashes over trying to get the points? I've tried so many different codes but none seem to work.


So I just want it to find the points for the row that contains that username and shop name, then add a certain amount to the points and update the database.



02-18 20:07:42.694 15570-15570/com.adventorious.quickrewards E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.adventorious.quickrewards, PID: 15570
java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
at android.database.CursorWindow.nativeGetString(Native Method)
at android.database.CursorWindow.getString(CursorWindow.java:439)
at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
at com.adventorious.quickrewards.Scan$3.onPreviewFrame(Scan.java:155)
at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1016)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)


THIS WORKS;



public boolean checkPoints(String email, String name){
Cursor c = db.rawQuery("SELECT POINTS FROM compdata WHERE EMAIL= ? AND NAME=?", new String[] {email, name});
if(c.moveToFirst()) {
return true;
} else {
return false;

}
}


So why doesn't it work to get the data?


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