How to show DatePickerDialog on Button click? [closed]

I. In your build.gradle add latest appcompat library, at the time 24.2.1

dependencies {  
    compile 'com.android.support:appcompat-v7:X.X.X' 
    // where X.X.X version
}

II. Make your activity extend android.support.v7.app.AppCompatActivity and implement the DatePickerDialog.OnDateSetListener interface.

public class MainActivity extends AppCompatActivity  
    implements DatePickerDialog.OnDateSetListener {

III. Create your DatePickerDialog setting a context, the implementation of the listener and the start year, month and day of the date picker.

DatePickerDialog datePickerDialog = new DatePickerDialog(  
    context, MainActivity.this, startYear, starthMonth, startDay);

IV. Show your dialog on the click event listener of your button

((Button) findViewById(R.id.myButton))
    .setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        datePickerDialog.show();
    }
});