Take a picture from the camera set in the imageView Android

Output:

1/ Modify your activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/imgCamera"
        android:layout_width="400dp"
        android:layout_height="400dp"
        android:scaleType="fitXY"/>


    <Button
        android:id="@+id/btnCamera"
        android:layout_gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="21dp"
        android:text="Open Camera"/>


</LinearLayout>

2/Modify your MainActivity.java .

package com.tutorialb.takeapicturefromthecamera;

import android.annotation.SuppressLint;
import android.content.ContentValues;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import androidx.activity.EdgeToEdge;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class MainActivity extends AppCompatActivity {

    private final int CAMERA_REQ_CODE = 100;

    ImageView imgViewCamera;
    Button BTNcamera;

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

        imgViewCamera = findViewById(R.id.imgCamera);
        BTNcamera = findViewById(R.id.btnCamera);

        BTNcamera.setOnClickListener(new View.OnClickListener() {
            @SuppressLint("QueryPermissionsNeeded")
            @Override
            public void onClick(View v) {
                Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
                    startActivityForResult(takePictureIntent, CAMERA_REQ_CODE);
                }
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (resultCode == RESULT_OK && requestCode == CAMERA_REQ_CODE) {
            Bundle extras = data.getExtras();
            Bitmap imageBitmap = null;
            if (extras != null) {
                imageBitmap = (Bitmap) extras.get("data");
            }


            imgViewCamera.setImageBitmap(imageBitmap);

            // Save the image to the gallery
            if (imageBitmap != null) {
                saveImageToGallery(imageBitmap);
            }
        }
    }

    private void saveImageToGallery(Bitmap bitmap) {
        OutputStream fos;
        try {
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {

                ContentValues values = new ContentValues();
                values.put(MediaStore.Images.Media.RELATIVE_PATH, "Pictures/MyAppImages");
                values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
                values.put(MediaStore.Images.Media.IS_PENDING, true);

                Uri uri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
                fos = getContentResolver().openOutputStream(uri);
                bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
                fos.flush();
                fos.close();

                values.put(MediaStore.Images.Media.IS_PENDING, false);
                getContentResolver().update(uri, values, null, null);
                Toast.makeText(this, "Image saved to gallery", Toast.LENGTH_SHORT).show();
            } else {

                String imagesDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).toString() + "/MyAppImages";
                File file = new File(imagesDir);
                if (!file.exists()) {
                    file.mkdirs();
                }

                File imageFile = new File(file, System.currentTimeMillis() + ".jpg");
                fos = new FileOutputStream(imageFile);
                bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
                fos.flush();
                fos.close();


                Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                Uri contentUri = Uri.fromFile(imageFile);
                mediaScanIntent.setData(contentUri);
                this.sendBroadcast(mediaScanIntent);

                Toast.makeText(this, "Image saved to gallery", Toast.LENGTH_SHORT).show();
            }
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(this, "", Toast.LENGTH_SHORT).show();
        }



    }
}