Source Code of MainAcivity.java

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.Manifest;
import android.content.ContentValues;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private static final int PERMISSION_CODE = 1000;
    private static final int IMAGE_CAPTURE_CODE = 1001;

    Button mCaptureBtn;
    ImageView mImageView;

    Uri image_uri;

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

        mImageView = findViewById(R.id.image_view);
        mCaptureBtn = findViewById(R.id.capture_image_btn);

        //button click
        mCaptureBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //if system os is >= marshmallow, request runtime permission
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
                    if (checkSelfPermission(Manifest.permission.CAMERA) ==
                            PackageManager.PERMISSION_DENIED ||
                            checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) ==
                                    PackageManager.PERMISSION_DENIED){
                        //permission not enabled, request it
                        String[] permission = {Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE};
                        //show popup to request permissions
                        requestPermissions(permission, PERMISSION_CODE);
                    }
                    else {
                        //permission already granted
                        openCamera();
                    }
                }
                else {
                    //system os < marshmallow
                    openCamera();
                }
            }
        });
    }

    private void openCamera() {
        ContentValues values = new ContentValues();
        values.put(MediaStore.Images.Media.TITLE, "New Picture");
        values.put(MediaStore.Images.Media.DESCRIPTION, "From the Camera");
        image_uri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
        //Camera intent
        Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, image_uri);
        startActivityForResult(cameraIntent, IMAGE_CAPTURE_CODE);
    }

    //handling permission result
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        //this method is called, when user presses Allow or Deny from Permission Request Popup
        switch (requestCode){
            case PERMISSION_CODE:{
                if (grantResults.length > 0 && grantResults[0] ==
                        PackageManager.PERMISSION_GRANTED){
                    //permission from popup was granted
                    openCamera();
                }
                else {
                    //permission from popup was denied
                    Toast.makeText(this, "Permission denied...", Toast.LENGTH_SHORT).show();
                }
            }
        }
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        //called when image was captured from camera

        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            //set the image captured to our ImageView
            mImageView.setImageURI(image_uri);
        }
    }
}

Source Code of 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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    tools:context=".MainActivity">

   
    <ImageView
        android:id="@+id/image_view"
        android:scaleType="centerCrop"
        tools:srcCompat="@tools:sample/avatars"
        android:layout_width="200dp"
        android:layout_height="200dp" />

    
    <Button
        android:id="@+id/capture_image_btn"
        android:text="Capture Image"
        style="@style/Base.Widget.AppCompat.Button.Colored"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

​

Add Following permission in AndroidManifest.xml File

<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Click Here to Download The App

Source Code of MainAcivity.java

import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import java.io.IOException;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity2 extends AppCompatActivity {



    final private int PICK_IMAGE_REQUEST = 1;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        Button selectImage = findViewById(R.id.capture_image_btn1);

        selectImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                chooseImage();
            }
        });
    }

    public void chooseImage() {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
    }

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

        if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {

            Uri uri = data.getData();

            try {
                Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);


                ImageView imageView = findViewById(R.id.image_view1);
                imageView.setImageBitmap(bitmap);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

Source Code of 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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    tools:context=".MainActivity">


    <ImageView
        android:id="@+id/image_view1"
        android:scaleType="centerCrop"
        tools:srcCompat="@tools:sample/avatars"
        android:layout_width="200dp"
        android:layout_height="200dp" />


    <Button
        android:id="@+id/capture_image_btn1"
        android:text="Change Image"
        style="@style/Base.Widget.AppCompat.Button.Colored"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

​

Add Following permission in AndroidManifest.xml File

<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Click Here to Download The App