How to open the camera in Android studio.

Let’s Make an App that Opens the Camera Via Intent and Show in ImageView.

Steps to Make an App

Step 1 ➤

Let’s Make a Button and an ImageView in XML Button to open the camera and ImageView to show the captured Image.

<!-- add Camera Button to open the Camera -->
<Button
android:id="@+id/camera_button"
android:layout_width="100dp"
android:layout_height="50dp"
android:layout_marginLeft="140dp"
android:text="Camera" />
<!-- add ImageView to display the captured image -->
<ImageView
android:id="@+id/click_image"
android:layout_width="350dp"
android:layout_height="450dp"
android:layout_marginLeft="15dp"
android:layout_marginTop="70dp"
android:layout_marginBottom="10dp" />

Step 2 ➤

Now in the MainActivity file first We will instantiate the components made in the XML file (Camera Button, ImageView) using the findViewById() method. And define the variable pic_id which is the request-id of the clicked image.

private static final int pic_id = 123

After that Create the MediaStore-provided ACTION_IMAGE_CAPTURE Intent at this point. This Intent will assist in opening the camera so that the picture may be taken. With the requested pic_id, begin the intent.

Intent camera_intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
startActivityForResult(camera_intent, pic_id);

Use the onActivityResult() function to obtain the result.

protected void onActivityResult(int requestCode, int resultCode, Intent data) { }

Then set the image received as a result of Camera intent in the ImageView for display.

Bitmap photo = (Bitmap) data.getExtras().get("data");
image.setImageBitmap(photo);

This is the full code for opening the camera and setting the Image in ImageView.

import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.widget.Button;
import android.widget.ImageView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
// Define the pic id
 private static final int pic_id = 123;
 // Define the button and imageview type variable
 Button camera;
 ImageView image;
@Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
// By ID we can get each component which id is assigned in XML file get Buttons and imageview.
  camera = findViewById(R.id.camera_button);
  image = findViewById(R.id.click_image);
// Camera button is for open the camera and add the setOnClickListener in this button
  camera.setOnClickListener(v -> {
   // Create the camera_intent ACTION_IMAGE_CAPTURE it will open the camera for capture the image
   Intent camera_intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
   // Start the activity with camera_intent, and request pic id
   startActivityForResult(camera_intent, pic_id);
  });
 }
// This method will help to retrieve the image
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  // Match the request 'pic id with requestCode
  if (requestCode == pic_id) {
   // BitMap is data structure of image file which store the image in memory
   Bitmap photo = (Bitmap) data.getExtras().get("data");
   // Set the image in imageview for display
   image.setImageBitmap(photo);
  }
 }
}

Many thanks for your time.