CalendarView - Android Widgets Example

package com.myapp;

import android.os.Bundle;
import android.app.Activity;
import android.widget.CalendarView;
import android.content.Intent;

public class myCalendarView  extends Activity {
	
    private int mYear;
    private int mMonth;
    private int mDay;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        CalendarView calendar = new CalendarView(this);
        calendar.setOnDateChangeListener(mDateSetListener);
        setContentView(calendar);

    }

    // the callback received when the user "sets" the date in the dialog
    private CalendarView.OnDateChangeListener mDateSetListener =
        new CalendarView.OnDateChangeListener() {

        public void onSelectedDayChange(CalendarView view, int year, 
                int monthOfYear, int dayOfMonth) {
            mYear = year;
            mMonth = monthOfYear;
            mDay = dayOfMonth;
            String selectedDate = new StringBuilder().append(mMonth + 1).append("-").append(mDay).append("-")
            .append(mYear).append(" ").toString();

            Bundle b = new Bundle();
            b.putString("dateSelected", selectedDate);

            //Add the set of extended data to the intent and start it
            Intent intent = new Intent();
            intent.putExtras(b);
            setResult(RESULT_OK,intent);       
            finish();
        }
    };

}

<activity android:name=".myCalendarView" android:theme="@style/AppTheme" />

package com.myapp;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Button;
import android.widget.EditText;
import android.view.View;
import java.util.Calendar;
import android.content.Intent;

public class MainActivity extends Activity {
	
    private EditText editT1;
    private Button btn1;

    private int mYear;
    private int mMonth;
    private int mDay;

    static final int CALENDAR_VIEW_ID = 1;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       
        
        // editText1
        editT1 = (EditText) findViewById(R.id.editText1);
        
        // button1
        btn1 = (Button) findViewById(R.id.button1);

        // add a click listener to the button
        btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, myCalendarView.class); 
                startActivityForResult(intent,CALENDAR_VIEW_ID); 
            }
        });
        
        // get the current date
        final Calendar c = Calendar.getInstance();
        mYear = c.get(Calendar.YEAR);
        mMonth = c.get(Calendar.MONTH);
        mDay = c.get(Calendar.DAY_OF_MONTH);

        // display the current date
        updateCurrentDate();
		
    }

    // updates the date we display in the TextView
    private void updateCurrentDate() {
    	editT1.setText(
            new StringBuilder()
                    // Month is 0 based so add 1
                    .append(mMonth + 1).append("-")
                    .append(mDay).append("-")
                    .append(mYear).append(" "));
    }
    
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        switch(requestCode) {
        case CALENDAR_VIEW_ID: 
            if (resultCode == RESULT_OK) {

                Bundle bundle = data.getExtras();
                editT1.setText(bundle.getString("dateSelected"));
                break;
            }
        }

    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
}