TimePickerActivity.java

package com.materialdoc.ui.activity;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TimePicker;
import com.materialdoc.R;

import java.util.Calendar;

public class TimePickerActivity extends AppCompatActivity implements TimePickerDialog.OnTimeSetListener {

    public static void start(@NonNull Activity activity) {
        Intent intent = new Intent(activity, TimePickerActivity.class);
        activity.startActivity(intent);
    }

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


    private void initViews() {
        findViewById(R.id.btnShow).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showTimePicker();
            }
        });

        findViewById(R.id.btnShowStyled).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showStyledTimePicker();
            }
        });
    }

    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

    }

    private void showTimePicker() {
        Calendar calendar = Calendar.getInstance();

        TimePickerDialog timePickerDialog = new TimePickerDialog(this, this,
                calendar.get(Calendar.HOUR_OF_DAY),
                calendar.get(Calendar.MINUTE),
                true);

        timePickerDialog.show();
    }

    private void showStyledTimePicker() {
        Calendar calendar = Calendar.getInstance();

        TimePickerDialog timePickerDialog = new TimePickerDialog(this, R.style.TimePickerTheme, this,
                calendar.get(Calendar.HOUR_OF_DAY),
                calendar.get(Calendar.MINUTE),
                true);

        timePickerDialog.show();
    }
}