How do I access the camera on Android phones?

Question

I\'ve written a program in Java that takes in an image file and manipulates the image. Now I\'m trying to access the camera so that I can take the photo and give it to the image

Answer 1

There are two methods to take photo for your android application

1)Using Intent

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name

// start the image capture Intent
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

2) Creating a customized camera activity. For that you need following steps

 * Detect and Access Camera
 * Create a Preview Class
 * Build a Preview Layout 
 * Capture and Save Files
 * Release the Camera

You may also refer the following links:

http://developer.android.com/guide/topics/media/camera.html http://developer.android.com/reference/android/hardware/Camera.html

Answer 2

the most important method is:

Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
    public void onPictureTaken(byte[] imageData, Camera c) {

    }
};

This method is called when a picture is taken. Here is a good tutorial on this topic: http://www.brighthub.com/mobile/google-android/articles/43414.aspx

hmm... or maybe you need this one:

Camera mCamera;
...
public void onClick(View arg0) {
    mCamera.takePicture(null, mPictureCallback, mPictureCallback);
}

Here is one more example: http://snippets.dzone.com/posts/show/8683

Answer 3

there are many ways by which u can do this.... One of the better way which i think is the short and simple is to on Button Click u can call intent which opens ur inbuilt camera view... here is the sample code...

public class CameraDemo extends Activity {

Button ButtonClick;
int CAMERA_PIC_REQUEST = 2; 
int  TAKE_PICTURE=0;
Camera camera;


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ButtonClick =(Button) findViewById(R.id.Camera);
    ButtonClick.setOnClickListener(new OnClickListener (){
        @Override
        public void onClick(View view)
        {
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
        }
    });        
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) 
{
    super.onActivityResult(requestCode, resultCode, data);
    if( requestCode == CAMERA_PIC_REQUEST)
    {   
        Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
        ImageView image =(ImageView) findViewById(R.id.PhotoCaptured);
        image.setImageBitmap(thumbnail);
    }
    else 
    {
        Toast.makeText(demo.this, "Picture NOt taken", Toast.LENGTH_LONG);
    }

}
}

..............................................................

Go through it and, if u have any problem feel free to ask....

rakesh

Answer 4

Google is your best friend, here are some tutorials:

Using the camera

How-To Program The Google Android Camera To Take Pictures

Take Picture from Camera Emulator

camera

First edit your AndroidManifest.xml, add the camera permission:

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

Camera service has to be opened and closed:

Camera camera = Camera.open();
 //Do things with the camera
camera.release();

You can set camera settings, e.g.:

Camera.Parameters parameters = camera.getParameters();
parameters.setPictureFormat(PixelFormat.JPEG); 
camera.setParameters(parameters);

To take a picture:

private void takePicture() {
  camera.takePicture(shutterCallback, rawCallback, jpegCallback); 
}

ShutterCallback shutterCallback = new ShutterCallback() {
  public void onShutter() {
    // TODO Do something when the shutter closes.
  }
};

PictureCallback rawCallback = new PictureCallback() {
  public void onPictureTaken(byte[] _data, Camera _camera) {
    // TODO Do something with the image RAW data.
  }
};

PictureCallback jpegCallback = new PictureCallback() {
  public void onPictureTaken(byte[] _data, Camera _camera) {
    // TODO Do something with the image JPEG data.
  }
};

Do not forget to add the camera layout to your main layout xml.