How to set the date in datepicker dialog in android?

This example demonstrates about how do I set the date in datepicker dialog in Android.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:id="@+id/rl"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="10dp"
   tools:context=".MainActivity"
   android:background="#f2f6f4">
   <TextView
      android:id="@+id/textView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Date"
      android:layout_above="@id/button"
      android:textSize="30dp"
      android:layout_centerHorizontal="true"
      android:layout_marginBottom="28dp"
      android:fontFamily="sans-serif-condensed"/>
   <Button
      android:id="@+id/button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Set Date"
      android:layout_centerVertical="true"
      android:layout_centerHorizontal="true"/>
</RelativeLayout>
Step 3 − Add the following code to res/layout/DatePickerFragment.java (Right click on the package, click new – Java Class)
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import java.util.Calendar;
public class DatePickerFragment extends DialogFragment {
   @NonNull
   @Override
   public Dialog onCreateDialog(Bundle savedInstanceState) {
      Calendar c = Calendar.getInstance();
      int year = c.get(Calendar.YEAR);
      int month = c.get(Calendar.MONTH);
      int day = c.get(Calendar.DAY_OF_MONTH);
      return new DatePickerDialog(getActivity(), (DatePickerDialog.OnDateSetListener)getActivity(), year, month, day);
   }
}
Step 4 − Add the following code to src/MainActivity.java
import android.app.DatePickerDialog;
import android.support.v4.app.DialogFragment;
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.TextView;
import java.text.DateFormat;
import java.util.Calendar;
public class MainActivity extends AppCompatActivity implements DatePickerDialog.OnDateSetListener {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      Button button = (Button) findViewById(R.id.button);
      button.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            DialogFragment datePicker = new DatePickerFragment();
            datePicker.show(getSupportFragmentManager(), "date picker");
         }
      });
   }
   public void onDateSet(DatePicker view, int year, int month, int dayOfMonth){
      Calendar c = Calendar.getInstance();
      c.set(Calendar.YEAR,year);
      c.set(Calendar.MONTH,month);
      c.set(Calendar.DAY_OF_MONTH,dayOfMonth);
      String currentDateString = DateFormat.getDateInstance(DateFormat.FULL).format(c.getTime());
      TextView textView = (TextView) findViewById(R.id.textView);
      textView.setText(currentDateString);
   }
}
Step 5 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
Click here to download the project code.