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Android 2.2 requestFocus() and spinners
spinner.setFocusable(true);
spinner.setFocusableInTouchMode(true);

import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;

public class dynamic_spinner_main extends Activity {

    private Spinner m_myDynamicSpinner;
    private EditText m_addItemText;
    private ArrayAdapter<CharSequence> m_adapterForSpinner;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_spinner);

        ///////////////////////////////////////////////////////////////
        //grab our UI elements so we can manipulate them (in the case of the Spinner)
        //    or add listeners to them (in the case of the buttons)
        m_myDynamicSpinner = (Spinner)findViewById(R.id.dynamicSpinner);
        m_addItemText = (EditText)findViewById(R.id.newSpinnerItemText);
        Button addButton = (Button)findViewById(R.id.AddBtn);
        Button clearButton = (Button)findViewById(R.id.ClearBtn);

        ////////////////////////////////////////////////////////////////
        //create an arrayAdapter an assign it to the spinner
        m_adapterForSpinner = new ArrayAdapter(this, android.R.layout.simple_spinner_item);
        m_adapterForSpinner.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        m_myDynamicSpinner.setAdapter(m_adapterForSpinner);
        m_adapterForSpinner.add("gr");
        m_myDynamicSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                // your code here
                Intent mIntent=new Intent(dynamic_spinner_main.this,sampleLocalization.class);
                mIntent.putExtra("lang", m_myDynamicSpinner.getItemIdAtPosition(position));
                System.out.println("Spinner value...."+m_myDynamicSpinner.getSelectedItem().toString());
                startActivity(mIntent);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parentView) {
                // your code here
            }

        });
        ////////////////////////////////////////////////////////////////
        //add listener for addButton
        addButton.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                addNewSpinnerItem();
            }
        });

        ////////////////////////////////////////////////////////////////
        //add listener for addButton
        clearButton.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                clearSpinnerItems();
            }
        });
    }

    private void addNewSpinnerItem() {
        CharSequence textHolder = "" + m_addItemText.getText();
        m_adapterForSpinner.add(textHolder);
    }

    private void clearSpinnerItems() {
        m_adapterForSpinner.clear();
        m_adapterForSpinner.add("dummy item");
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <EditText android:layout_height="wrap_content"
            android:layout_margin="4px"
            android:id="@+id/newSpinnerItemText"
            android:layout_width="fill_parent"></EditText>
    <Button android:layout_height="wrap_content"
            android:id="@+id/AddBtn"
            android:layout_margin="4px"
            android:layout_width="fill_parent"
            android:text="Add To Spinner"></Button>
    <Button android:layout_height="wrap_content"
            android:id="@+id/ClearBtn"
            android:layout_margin="4px"
            android:layout_width="fill_parent"
            android:text="Clear Spinner Items"></Button>
    <Spinner android:layout_height="wrap_content"
            android:id="@+id/dynamicSpinner"
            android:layout_margin="4px"
            android:layout_width="fill_parent"></Spinner>
</LinearLayout>

<Spinner
    android:id="@+id/spinner"
    android:focusable="true"
    android:layout_width="wrap_conten"
    android:layout_height="wrap_content" />

findViewById(R.id.spinner).setFocusable(true);