import java.security.NoSuchAlgorithmException;

import java.security.MessageDigest;

import java.lang.reflect.*;

import java.net.*;

import java.io.*;

import javax.swing.*;

import java.util.regex.*;

import java.util.*;

import android.app.Activity;

import android.widget.*;

import android.graphics.*;

import android.hardware.Camera;

import android.view.*;

public class main {

  static Activity androidContext;

  public static void main(String[] args) throws Exception {

    System.out.println("Listing cameras...");

    androidContext.runOnUiThread(new Runnable() {

public void run() { try {

      int n = Camera.getNumberOfCameras();

      System.out.println("Cameras: " + n);

      final Camera cam = Camera.open(0/*n-1*/);

      Camera.Parameters p = cam.getParameters();

      p.setPreviewSize(100, 100);

      cam.setParameters(p);

      SurfaceView surfaceView = new SurfaceView(androidContext);

      SurfaceHolder surfaceHolder = surfaceView.getHolder();

      surfaceHolder.addCallback(new CamCallback());

      surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

      androidContext.setContentView(surfaceView);

      cam.setPreviewDisplay(surfaceHolder);

      cam.startPreview();

      System.out.println("Preview started.");

      /*surfaceView.post(new Runnable() {

public void run() { try {

        cam.takePicture(null, null, null, new JpegCallback());

} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}});

      System.out.println("Waiting for callback");*/

} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}});

  }

  static class CamCallback implements SurfaceHolder.Callback {

    public void surfaceChanged (SurfaceHolder holder, int format, int width, int height) {

      System.out.println("surfaceChanged");

    }

    public void surfaceCreated (SurfaceHolder holder) {

      System.out.println("surfaceCreated");

    }

    public void surfaceDestroyed (SurfaceHolder holder) {

      System.out.println("surfaceDestroyed");

    }

  }

  static class ShutterCallback implements Camera.ShutterCallback {

    public void onShutter() {

      System.out.println("Shutter!");

    }

  }

  static class JpegCallback implements Camera.PictureCallback {

    public void onPictureTaken (byte[] data, Camera cam) {

      TextView tv = new TextView(androidContext);

      tv.setText("Picture data: " + data.length);

      androidContext.setContentView(tv);

      System.out.println("Picture data: " + data.length);

      cam.release();

      System.out.println("Camera released.");

    }

  } 

}