Spinner Hint Example

package com.example.spinnerhint;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.BaseAdapter;
import android.widget.Spinner;
import android.widget.SpinnerAdapter;
import android.widget.TextView;

public class MainActivity extends Activity {

    private String TAG = "SpinnerHint";

    private Spinner typeSpinner;

    private LayoutInflater mInflator;
    private boolean selected;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initUI();
    }

    private void initUI() {
        selected = false;
        typeSpinner = (Spinner) findViewById(R.id.id_type_spinner);
        typeSpinner.setAdapter(typeSpinnerAdapter);
        typeSpinner.setOnItemSelectedListener(typeSelectedListener);
        typeSpinner.setOnTouchListener(typeSpinnerTouchListener);
        mInflator = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
        Log.d(TAG, "UI Initialized");
    }

    private SpinnerAdapter typeSpinnerAdapter = new BaseAdapter() {

        private TextView text;
        private String[] data = { "Selection 1", "Selection 2", "Selection 3" };
        private int count = 3;

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = mInflator.inflate(R.layout.row_spinner, null);
            }
            text = (TextView) convertView.findViewById(R.id.spinnerTarget);
            if (!selected) {
                text.setText("Please select a value");
            } else {
                text.setText(data[position]);
            }
            return convertView;
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public Object getItem(int position) {
            return data[position];
        }

        @Override
        public int getCount() {
            return count;
        }

        public View getDropDownView(int position, View convertView,
                ViewGroup parent) {
            if (convertView == null) {
                convertView = mInflator.inflate(
                        android.R.layout.simple_spinner_dropdown_item, null);
            }
            text = (TextView) convertView.findViewById(android.R.id.text1);
            text.setText(data[position]);
            return convertView;
        };
    };

    private OnItemSelectedListener typeSelectedListener = new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> parent, View view,
                int position, long id) {
            Log.d(TAG, "user selected : "
                    + typeSpinner.getSelectedItem().toString());

        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    };

    private OnTouchListener typeSpinnerTouchListener = new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            selected = true;
            ((BaseAdapter) typeSpinnerAdapter).notifyDataSetChanged();
            return false;
        }
    };

}


Layout(activity_main)
-------------
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="3dip"
            android:text="Spinner" >
        </TextView>

        <Spinner
            android:id="@+id/id_type_spinner"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/textView2"
            android:layout_below="@+id/textView2"
            android:layout_marginTop="3dip" >
        </Spinner>
    </RelativeLayout>

</RelativeLayout>


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

    <TextView
        android:id="@+id/spinnerTarget"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="left"
        android:paddingBottom="3dip"
        android:paddingLeft="6dip"
        android:paddingRight="6dip"
        android:paddingTop="3dip"
        android:text="TextView"
        android:textColor="#000000"
        android:textSize="16dp" >
    </TextView>

</LinearLayout>