How to work with Camera in an Android App?

This example demonstrates how to work with Camera in an Android App.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/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"
      >
   </ImageView>
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.java

package com.example.myapplication;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity {
   private static final int CAMERA_REQUEST=1888;
   ImageView imageView;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      imageView=(ImageView) this.findViewById(R.id.imageView1);
      Button photoButton=(Button) this.findViewById(R.id.button1);
      photoButton.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            Intent cameraIntent=new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(cameraIntent, CAMERA_REQUEST);
         }
      });
   }
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      if (requestCode == CAMERA_REQUEST) {
         Bitmap photo=(Bitmap) data.getExtras().get("data");
         imageView.setImageBitmap(photo);
      }
   }
}

Step 4 − Add the following code to Manifests/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.myapplication">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run   icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

Click here to download the project code

Azhar

Published on 30-Aug-2019 12:17:04