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POWhat's wrong with my code?
 

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  1. POWhat's wrong with my code?
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    <p>There is a null error, and i've been trying to solve it for 2 days.</p> <p>Booking.java</p> <pre><code>package one.two; import android.app.Activity; import android.database.Cursor; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.SimpleCursorAdapter; import android.widget.Spinner; import android.widget.TextView; import android.widget.AdapterView.OnItemSelectedListener; public class Booking extends Activity { private DBAdapter db; private Spinner colourSpinner; public Cursor myCursor; public TextView txtArrival; /** Called when the activity is first created. */ public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); db = new DBAdapter(this); this.setContentView(R.layout.booking); txtArrival = (TextView) findViewById(R.id.txtArrival); // Member assignment colourSpinner = (Spinner) findViewById(R.id.myspinner); // Member assignment db.open(); fillData(); db.close(); colourSpinner.setOnItemSelectedListener(new MyOnItemSelectedListener()); } private void fillData() { myCursor = db.getSpinnerData(); startManagingCursor(myCursor); String[] from = new String[]{DBAdapter.KEY_ARRIVAL}; int[] to = new int[]{android.R.id.text1}; SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,R.layout.booking, myCursor, from, to ); adapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item ); // Removed this line, since members is set in onCreate colourSpinner.setAdapter(adapter); } public class MyOnItemSelectedListener implements OnItemSelectedListener { public void onItemSelected(AdapterView&lt;?&gt; arg0, View v,int position, long id) { boolean result = Booking.this.myCursor.moveToPosition(position); if (result) { String title=Booking.this.myCursor.getString(1); Booking.this.txtArrival.setText(title); } } @Override public void onNothingSelected(AdapterView&lt;?&gt; arg0) { // TODO Auto-generated method stub } }; } </code></pre> <p>LogCat</p> <pre><code>08-10 03:45:06.467: ERROR/AndroidRuntime(750): Uncaught handler: thread main exiting due to uncaught exception 08-10 03:45:06.567: ERROR/AndroidRuntime(750): java.lang.NullPointerException 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at one.two.Booking$MyOnItemSelectedListener.onItemSelected(Booking.java:54) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at android.widget.AdapterView.fireOnSelected(AdapterView.java:856) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at android.widget.AdapterView.access$200(AdapterView.java:41) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:827) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at android.os.Handler.handleCallback(Handler.java:587) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at android.os.Handler.dispatchMessage(Handler.java:92) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at android.os.Looper.loop(Looper.java:123) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at android.app.ActivityThread.main(ActivityThread.java:3948) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at java.lang.reflect.Method.invokeNative(Native Method) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at java.lang.reflect.Method.invoke(Method.java:521) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) 08-10 03:45:06.567: ERROR/AndroidRuntime(750): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Thank you.</p>
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    1. PO
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    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USUser358218
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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    1. This table or related slice is empty.
    1. CO`txtArrival` is null?
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      1. POWhat's wrong with my code?
      1. USmsandiford
    2. COYes, i am supposed to put data from database into the textview.
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      1. POWhat's wrong with my code?
      1. USUser358218
    3. COBooking.this? Seems very odd syntax; am I missing something?
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      1. POWhat's wrong with my code?
      1. USArmand
 

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