ANDROID adapter in a spinner

Question

I have a little question about the use of spinners and adapter, i would like to search all the file in a directory and put the file's name in a spinner. this is my code :

File repertoire = new File(Environment.getExternalStorageDirectory()+"/androidtest/vente")  ;


    String[] tabFile = repertoire.list();

    if (tabFile==null){

        Log.d("file null","testdfed");  
    }
    Log.d("//","///////////");
    for (int i = 0; i < tabFile.length; i++) {
        Log.d("Tableau",tabFile[i].toString());
    }

    ArrayList<String> list = new ArrayList<String>();
    for(int i=0; i<tabFile.length; i++) {
        list.add(tabFile[i]);

    }

//for checking in the logcat if my code have found all the files        
   for (String s : list) {

       Log.d("Liste",s);
   }


//creation of the adapter   
    ArrayAdapter<String> adapter = new ArrayAdapter<String> (this,
            android.R.layout.simple_spinner_item, list);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    sp.setAdapter(adapter);

//finally the listener
    sp.setOnItemSelectedListener(new OnItemSelectedListener() {

    public void onItemSelected(AdapterView<?> arg0, View view, int position, long id) {
        int item = sp.getSelectedItemPosition();
        Toast.makeText(getBaseContext(),
                "You have selected 222 : " + item,
                Toast.LENGTH_SHORT).show();

    }
    public void onNothingSelected(AdapterView<?> arg0) { }
});

My code crash at sp.setAdapter(adapter); Thanks you ! :)

I'm new in SOF sso i have to edit my text: For the answer of Mukesh Kumar already done,i initialise before onCreate

public class OfflineActivity extends FragmentActivity {

private PagerAdapter mPagerAdapter;
private Spinner sp = (Spinner)findViewById(R.id.spinm);

protected void onCreate(Bundle savedInstanceState) {

so i replace like you would

public class OfflineActivity extends FragmentActivity {

private PagerAdapter mPagerAdapter;
private Spinner sp;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    super.setContentView(R.layout.viewpager);
    sp = (Spinner)findViewById(R.id.spinm);

bu my code crash for the same reason :/

Answer 1

As you told My code crash at sp.setAdapter(adapter);

It may be you have not initialised sp , . First initialise it befor use. ie In onCreate() of your Activity write this code.

sp= (Spinner)findViewById(R.id.Spinner_id_in_your_xml);

Answer 2

This will works for a spinner

spinner1 = (Spinner) findViewById(R.id.spinner1);
    List<String> list = new ArrayList<String>();
    list.add("Android");
    list.add("Java");
    list.add("Spinner Data");
    list.add("Spinner Adapter");
    list.add("Spinner Example");

    ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,list);
    dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner1.setAdapter(dataAdapter);

Answer 3

That may be because you are passing the fragment instead of the context try replacing ArrayAdapter<String> adapter = new ArrayAdapter<String> (this, android.R.layout.simple_spinner_item, list);

with

ArrayAdapter<String> adapter = new ArrayAdapter<String> (getActivity(),
        android.R.layout.simple_spinner_item, list);