!636

!711 // runnable {

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

main {
  static Activity androidContext;
  
  psvm {
    print "Listing cameras..."
    
    androidContext.runOnUiThread(runnable {
      int n = Camera.getNumberOfCameras();
      System.out.println("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(0);
  
            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
        }        
      });
      
      androidContext.setContentView(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);
      androidContext.setContentView(tv);
      
      System.out.println("Picture data: " + data.length);
      cam.release();
      print "Camera released."
    }
  } 
}

Began life as a copy of #1000431

From example: http://developer.android.com/reference/android/view/TextureView.html