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POHelp with showing data on spinner
 

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  1. POHelp with showing data on spinner
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    <p>i would like to show data from my database onto a spinner. how would that be possible? As there is an null error in my logcat.</p> <p>Booking.java</p> <pre><code>public class Booking extends Activity { private DBAdapter db; private Spinner colourSpinner; private String txtArrival; /** Called when the activity is first created. */ public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); db = new DBAdapter(this); db.open(); setContentView(R.layout.booking); Cursor c = db.getSpinnerData(); startManagingCursor(c); String[] from = new String[]{txtArrival}; int[] to = new int[]{android.R.id.text1}; SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, c, from, to ); adapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item ); Spinner colourSpinner = (Spinner) findViewById( R.id.spinner ); colourSpinner.setAdapter(adapter); } } </code></pre> <p>DBAdapter.java</p> <pre><code>public Cursor getSpinnerData() throws SQLException { Cursor mCursor = db.query(DATABASE_TABLE_2, new String[] { KEY_ROWID2, KEY_ARRIVAL,}, null, null, null, null, null); if (mCursor != null) { mCursor.moveToFirst(); } return mCursor; } </code></pre> <p>Logcat</p> <pre><code>08-02 08:39:27.123: ERROR/AndroidRuntime(746): Uncaught handler: thread main exiting due to uncaught exception 08-02 08:39:27.174: ERROR/AndroidRuntime(746): java.lang.RuntimeException: Unable to start activity ComponentInfo{one.two/one.two.Booking}: java.lang.NullPointerException 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2268) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2284) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.app.ActivityThread.access$1800(ActivityThread.java:112) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.os.Handler.dispatchMessage(Handler.java:99) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.os.Looper.loop(Looper.java:123) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.app.ActivityThread.main(ActivityThread.java:3948) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at java.lang.reflect.Method.invokeNative(Native Method) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at java.lang.reflect.Method.invoke(Method.java:521) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at dalvik.system.NativeStart.main(Native Method) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): Caused by: java.lang.NullPointerException 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.database.sqlite.SQLiteCursor.getColumnIndex(SQLiteCursor.java:311) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.database.AbstractCursor.getColumnIndexOrThrow(AbstractCursor.java:312) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.widget.SimpleCursorAdapter.findColumns(SimpleCursorAdapter.java:336) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.widget.SimpleCursorAdapter.&lt;init&gt;(SimpleCursorAdapter.java:88) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at one.two.Booking.onCreate(Booking.java:27) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2231) 08-02 08:39:27.174: ERROR/AndroidRuntime(746): ... 11 more </code></pre> <p>Thank you.</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USUser358218
    1. USUser358218
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    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. PTAnswer
    1. This table or related slice is empty.
    1. COIt would help very much if you could also post your logcat output. Please edit it into your original question.
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      1. POHelp with showing data on spinner
      1. USJanusz
    2. COOk sure, i'll add it in
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      1. POHelp with showing data on spinner
      1. USUser358218
 

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