!7

import android.app.Activity;
import android.widget.*;
import android.graphics.*;
import android.hardware.Camera;
import android.view.*;

p {
  print "Listing cameras..."
  
  runOnUiThread(runnable {
    final int n = Camera.getNumberOfCameras();
    print("Cameras: " + n);

    //final Camera cam = Camera.open(0/*n-1*/);
    
    TextureView mTextureView = new TextureView(androidContext());
    
    mTextureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
      Camera mCamera;
      
      public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
          mCamera = Camera.open(n-1);

          try {
              mCamera.setPreviewTexture(surface);
              mCamera.startPreview();
          } catch (IOException ioe) {
              // Something bad happened
          }
      }

      public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
          // Ignored, Camera does all the work for us
      }

      public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
          mCamera.stopPreview();
          mCamera.release();
          return true;
      }

      public void onSurfaceTextureUpdated(SurfaceTexture surface) {
          // Invoked every time there's a new Camera preview frame
      }        
    });
    
    androidShow(mTextureView);
  });
}

static class CamCallback implements SurfaceHolder.Callback {
  public void surfaceChanged (SurfaceHolder holder, int format, int width, int height) {
    print "surfaceChanged"
  }
  public void surfaceCreated (SurfaceHolder holder) {
    print "surfaceCreated"
  }
  public void surfaceDestroyed (SurfaceHolder holder) {
    print "surfaceDestroyed"
  }
}

static class ShutterCallback implements Camera.ShutterCallback {
  public void onShutter() {
    print "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);
    androidShow(tv);
    
    System.out.println("Picture data: " + data.length);
    cam.release();
    print "Camera released."
  }
}

Began life as a copy of #1000447