Slip 16 - D) Create an Android Application that Demonstrate TimePickerand display Selected Time on TextView.

Solution:

Xml file

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_above="@+id/button1"

        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true"

        android:layout_marginBottom="102dp"

        android:layout_marginLeft="30dp"

        android:layout_marginStart="30dp"

        android:text="" />

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="20dp"

        android:text="Change Time" />

    <TimePicker

        android:id="@+id/timePicker"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_above="@+id/textView1"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="36dp" />

</RelativeLayout>

Main activity file

package com.example.slip16_timepicker;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import android.widget.TimePicker;

public class MainActivity extends AppCompatActivity {

    TextView textview1;

    TimePicker timepicker;

    Button changetime;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        textview1=(TextView)findViewById(R.id.textView1);

        timepicker=(TimePicker)findViewById(R.id.timePicker);

        //Uncomment the below line of code for 24 hour view

        timepicker.setIs24HourView(true);

        changetime=(Button)findViewById(R.id.button1);

        textview1.setText(getCurrentTime());

        changetime.setOnClickListener(new View.OnClickListener(){

            @Override

            public void onClick(View view) {

                textview1.setText(getCurrentTime());

            }

        });

    }

    public String getCurrentTime(){

        String currentTime="Current Time: "+timepicker.getCurrentHour()+":"+timepicker.getCurrentMinute();

        return currentTime;

    }

}