DatePickerDialog

package com.pingyijinren.helloworld.activity;

import android.app.DatePickerDialog;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.Toast;

import com.pingyijinren.helloworld.R;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private AlertDialog alertDialog;
    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button=(Button)findViewById(R.id.button);
        button.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        DatePickerDialog datePickerDialog=new DatePickerDialog(this,new DatePickerDialog.OnDateSetListener(){
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                monthOfYear++;
                Toast.makeText(MainActivity.this,year+"/"+monthOfYear+"/"+dayOfMonth,Toast.LENGTH_SHORT).show();
            }
        },2016,5,2);
        datePickerDialog.show();
    }
}