Opening Camera from Application

The basic things for augmented reality are camera, Sensor to know the direction, and the GPS or network provider to get the current location details. Gradually, I will show you the Augmented Reality in Android. In this, showing you how to open a camera from application.

CameraPreview.java


 
class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {

SurfaceHolder holder;
Camera camera;

public CameraPreview(Context context) {
super(context);
holder = getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

@Override
public void surfaceChanged(SurfaceHolder holder2, int format, int w,
int h) {
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewSize(w, h);
camera.setParameters(parameters);
camera.startPreview();
}

@Override
public void surfaceCreated(SurfaceHolder holder1) {
try {
camera = Camera.open();
camera.setPreviewDisplay(holder1);
} catch (Exception e) {
Log.i("Exception surfaceCreated()", "e = " + e);
camera.release();
camera = null;
}

}

@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
camera.stopPreview();
camera.release();
camera = null;
}
}



Create an object of CameraPreview and using setContentView(), just display the camera

OpenCamera.java

 
public class OpenCamera extends Activity {

CameraPreview preview;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Hide the window title.
requestWindowFeature(Window.FEATURE_NO_TITLE);
preview = new CameraPreview(this);
setContentView(preview);
}
}


And ofcourse, the permission is needed,


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

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