PROGRAM – 02 -- Create an application that will change wall paper time by time

 

Code:-

XML Code:-

<?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:id="@+id/homelayout"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@color/white"

    tools:context=".MainActivity">



    <TextView

        android:id="@+id/viewtime"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="200dp"

        android:gravity="center"

        android:textStyle="bold"

        android:text="This is Current Time "

        android:textSize="30sp" />

    <Button

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_below="@+id/viewtime"

        android:layout_marginTop="30dp"

        android:id="@+id/getDateTime"

        android:text="Get Date and  Time"

        />

</RelativeLayout>

 

Java Code:-

 

package com.example.mansamcapro2;



import androidx.appcompat.app.AppCompatActivity;

import androidx.constraintlayout.widget.ConstraintLayout;



import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.RelativeLayout;

import android.widget.TextView;

import android.widget.Toast;



import java.text.SimpleDateFormat;

import java.util.Calendar;



public class MainActivity extends AppCompatActivity {

    Calendar calendar;

    SimpleDateFormat simpleDateFormat;

    String Date;

    String Time;

    TextView showDateTime;

    Button btndatetime;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        showDateTime = (TextView)findViewById(R.id.viewtime);

        btndatetime = (Button)findViewById(R.id.getDateTime);



        Calendar c = Calendar.getInstance();

        simpleDateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");

        Date=simpleDateFormat.format(c.getTime());

        //Time=simpleDateFormat.format(c.getTime());

        int timeOfDay = c.get(Calendar.HOUR_OF_DAY);

        int dateOfMonth = c.get(Calendar.DAY_OF_MONTH);

        btndatetime.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {



                showDateTime.setText(Date);

                Toast.makeText(MainActivity.this,"Day: "+dateOfMonth+"\n"+"Time:"+timeOfDay,Toast.LENGTH_SHORT).show();

               }

        });



        RelativeLayout homeLayout = findViewById(R.id.homelayout);



        if(timeOfDay >= 8 && timeOfDay < 10 && dateOfMonth >= 1 && dateOfMonth < 8){



            homeLayout.setBackgroundResource(R.drawable.c);

        }else if(timeOfDay >= 10 && timeOfDay < 12 && dateOfMonth >= 8 && dateOfMonth < 20){



            homeLayout.setBackgroundResource(R.drawable.d);



        }else if(timeOfDay >= 13 && timeOfDay < 18 && dateOfMonth >= 20 && dateOfMonth < 25){



            homeLayout.setBackgroundResource(R.drawable.b);

        }else if(timeOfDay >= 18 && timeOfDay < 24 && dateOfMonth >= 25 && dateOfMonth < 30){



            homeLayout.setBackgroundResource(R.drawable.a);

        }

    }

}

Output:-