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Android Camera

  • Camera is mainly used to capture picture and video.
  • We can control the camera by using methods of camera api.
  • Android provides the facility to work on camera by 2 ways:
    1. By Camera Intent
    2. By Camera API

Understanding basic classes of Camera Intent and API

There are mainly four classes that we are going to discuss.

1. Intent

By the help of 2 constants of MediaStore class, we can capture picture and video without using the instance of Camera class.
  1. ACTION_IMAGE_CAPTURE
  2. ACTION_VIDEO_CAPTURE

2. Camera

It is main class of camera api, that can be used to take picture and video.

3. SurfaceView

It represents a surface view ore preview of live camera.

4. MediaRecorder

It is used to record video using camera.

Android camera app example by camera intent

1. activity_main.xml

File: activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    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/ic_launcher" >  
    </ImageView>  
</RelativeLayout>

2. Activity class

File: MainActivity.java

import android.app.Activity;  
import android.content.Intent;  
import android.graphics.Bitmap;  
import android.os.Bundle;  
import android.view.Menu;  
import android.view.View;  
import android.widget.Button;  
import android.widget.ImageView;  
  
public class MainActivity extends Activity {  
     private static final int CAMERA_REQUEST = 1888;  
     ImageView imageView;  
     public 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);  
      }  
   }  
  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        // Inflate the menu; this adds items to the action bar if it is present.  
        getMenuInflater().inflate(R.menu.activity_main, menu);  
        return true;  
    }  
  
} 

OUTPUT :