demande help spinner sur android Studio

bonjour

Veuillez SVP m indiquer ou se trouve l ' erreur sur le code suivant

l exécution a échoué : unfortunelay , code has stop
Code:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
package com.example.code;
 
import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
 
 
 
public  class MainActivity extends Activity implements AdapterView.OnItemSelectedListener {
 
 
 
    private Spinner spinner;
	private ArrayAdapter<CharSequence> adapter;
 
 
 
 
	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
 
        spinner = (Spinner) findViewById(R.id.spinner1);
        adapter = ArrayAdapter.createFromResource(this, R.array.planets, android.R.layout.simple_spinner_item);
 
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
 
        spinner.setAdapter(this.adapter);
 
        spinner.setOnItemSelectedListener(this);
 
    }
 
 
 
 
	@Override
	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
			long arg3) {
		// TODO Auto-generated method stub
 
	}
 
 
 
 
	@Override
	public void onNothingSelected(AdapterView<?> arg0) {
		// TODO Auto-generated method stub
 
	}