cameraApp

To create drawable files :
Option 1 - Harddisk - copy image. Right click drawablle - paste.
Option 2 - Right click drawable -> New -> Vector asset - Choose the asset and customise → click next → click finish

Activity_main.xml
<?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">
   <Button
       android:id="@+id/button1"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_alignParentBottom="true"
       android:layout_centerHorizontal="true"
       android:text="Take a Photo">
   </Button>
   <ImageView
       android:id="@+id/imageView1"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       android:layout_above="@+id/button1"
       android:layout_alignParentTop="true"
       android:src="@drawable/a">
   </ImageView>
</RelativeLayout>

package com.example.a23_implicitintent_camera;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
   private static final int CAMERA_REQUEST = 18;
   ImageView imageView;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       imageView = findViewById(R.id.imageView1);
       Button photoButton = findViewById(R.id.button1);
       photoButton.setOnClickListener(this);
   }
   @Override
   public void onClick(View v) {
       Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
       startActivityForResult(cameraIntent,CAMERA_REQUEST);
   }
   @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
       if (requestCode == CAMERA_REQUEST) {
           Bitmap photo = (Bitmap) data.getExtras().get("data");
           imageView.setImageBitmap(photo);
           //Toast.makeText(this,String.valueOf(resultCode), Toast.LENGTH_SHORT).show();
       }
   }
}