Android Camera App with Examples

In android, Camera is useful to capture the photos and videos in our applications. By using camera api we can control the functionalities of camera based on our requirements.

 

The android framework provides a two ways such as android.hardware.camera2 api and camera intent to capture the images and videos in our application.

android.hardware.camera2

It’s a primary API for controlling the device cameras. By using this we can take the pictures or videos from our application using camera.

Intent

By using intent action types either MediaStore.ACTION_IMAGE_CAPTURE or MediaStore.ACTION_VIDEO_CAPTURE, we can capture the photos or videos without directly using the Camera object.

 

The best way is to use an Intent to invoke an existing Android camera application to take pictures or videos in our application without writing a lot of extra code.

 

In android, By using startActivityForResult() method with intent action parameter MediaStore.ACTION_IMAGE_CAPTURE, we can take the pictures from our android applications.

 

Following is the code snippet to capture the pictures using intent object with action parameter MediaStore.ACTION_IMAGE_CAPTURE in android applications.

 

Intent cInt = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cInt,
Image_Capture_Code);

If you observe above code snippet, we used startActivityForResult() method with MediaStore.ACTION_IMAGE_CAPTURE intent action parameter to capture the photos. The second parameter Image_Capture_Code is a locally defined integer that must be greater than 0.

Android Camera App Example

Following is the example of using an existing camera app in our android applications to capture the photos on button click.

 

Create a new android application using android studio and give names as CameraExample. In case if you are not aware of creating an app in android studio check this article Android Hello World App.

 

Once we create an application, open activity_main.xml file from \res\layout folder path and write the code like as shown below.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   
android:layout_width="match_parent"
   
android:layout_height="match_parent"
   
android:paddingLeft="10dp"
   
android:paddingRight="10dp">
    <
Button
       
android:id="@+id/btnTakePicture"
       
android:layout_width="wrap_content"
       
android:layout_height="wrap_content"
       
android:text="Take a Photo"
       
android:textStyle="bold"
       
android:layout_centerHorizontal="true"
       
android:layout_alignParentBottom="true" />
    <
ImageView
       
android:layout_width="fill_parent"
       
android:layout_height="fill_parent"
       
android:id="@+id/capturedImage"
       
android:layout_above="@+id/btnTakePicture"/>
</
RelativeLayout>

Now open your main activity file MainActivity.java from \java\com.tutlane.cameraexample path and write the code like as shown below

MainActivity.java

package com.tutlane.cameraexample;
import android.content.Intent;
import android.graphics.Bitmap;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
   
private Button btnCapture;
   
private ImageView imgCapture;
   
private static final int Image_Capture_Code = 1;
   
@Override
   
protected void onCreate(Bundle savedInstanceState) {
       
super.onCreate(savedInstanceState);
        setContentView(R.layout.
activity_main);
       
btnCapture =(Button)findViewById(R.id.btnTakePicture);
       
imgCapture = (ImageView) findViewById(R.id.capturedImage);
       
btnCapture.setOnClickListener(new View.OnClickListener() {
           
@Override
           
public void onClick(View v) {
                Intent cInt =
new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(cInt,
Image_Capture_Code);
            }
        });
    }
   
@Override
   
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       
if (requestCode == Image_Capture_Code) {
           
if (resultCode == RESULT_OK) {
                Bitmap bp = (Bitmap) data.getExtras().get(
"data");
               
imgCapture.setImageBitmap(bp);
            }
else if (resultCode == RESULT_CANCELED) {
                Toast.makeText(
this, "Cancelled", Toast.LENGTH_LONG).show();
            }
        }
    }
}

If you observe above code snippet, we used startActivityForResult() method with MediaStore.ACTION_IMAGE_CAPTURE intent action parameter to capture the photos.

Output of Android Camera App Example

When we run above program in android studio we will get the result like as shown below.

 

Android Camera App Example Result

 

When we click on Take a Photo button, the camera will start and we can take the picture of whatever we want, the captured image will be shown in defined imageview.

 

This is how we can use camera in android applications to capture the photos or videos based on our requirements.