Spinner macht probleme

1package de.android.spinnernew;
2
3import android.app.Activity;
4import android.os.Bundle;
5import android.view.View;
6import android.widget.AdapterView;
7import android.widget.AdapterView.OnItemSelectedListener;
8import android.widget.ArrayAdapter;
9import android.widget.Spinner;
10import android.widget.Toast;
11
12public class MainActivity extends Activity implements OnItemSelectedListener{
13 Spinner spinner;
14 @Override
15 public void onCreate(Bundle savedInstanceState) {
16 super.onCreate(savedInstanceState);
17 setContentView(R.layout.activity_main);
18 spinner = (Spinner) findViewById(R.id.spinner);
19
20 //Register a callback to be invoked when an item in this AdapterView has been selected.
21 //The argument is the callback that will return
22
23 spinner.setOnItemSelectedListener(MainActivity.this);
24
25 // Adapter for spinner
26 ArrayAdapter<?> adapter = ArrayAdapter.createFromResource(getApplicationContext(), R.array.spinnerItems, android.R.layout.simple_spinner_dropdown_item);
27 // Sets the layout resource to create the drop down views
28 adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
29
30 //The Adapter is used to provide the data which backs this Spinner.
31 spinner.setAdapter(adapter);
32 }
33 //Hier kommt dann der Error
34 @Override
35 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
36
37 // On selecting a spinner item
38 String item = parent.getItemAtPosition(position).toString();
39
40 // showing a toast on selecting an item
41 Toast.makeText(parent.getContext(), item, Toast.LENGTH_LONG).show();
42
43 }
44
45 public void onNothingSelected(AdapterView<?> arg0) {
46
47 }
48
49}

1<?xml version="1.0" encoding="utf-8"?>
2<LinearLayout
3 android:layout_width="fill_parent"
4 android:layout_height="fill_parent"
5 android:orientation="vertical" >
6
7 <Spinner
8 android:id="@+id/spinner"
9 android:layout_width="273dp"
10 android:layout_height="wrap_content"
11 android:layout_marginLeft="10px"
12 android:layout_marginRight="10px"
13 android:layout_marginTop="25dip"
14 android:drawSelectorOnTop="true"
15 android:prompt="@string/spin" />
16
17</LinearLayout>

1<?xml version="1.0" encoding="utf-8"?>
2<resources>
3<string-array name="spinnerItems">
4 <item></item>
5 <item>Books</item>
6 <item>Novels</item>
7 <item>eBooks</item>
8 <item>Android App</item>
9 <item>Learn Android</item>
10 </string-array>
11
12</resources>