OpenTerrain

// copyright by Stefan Roettger, licensed under the "New BSD License"

package org.openterrain.example;

import org.openterrain.example.Main;
import android.hardware.Camera;
import java.lang.String;
import java.util.List;
import android.graphics.SurfaceTexture;
import android.util.Log;

public class Torch extends Main
{
    protected Camera cam;
    protected Camera.Parameters params;

    public void on()
    {
        try
        {
            cam = Camera.open();
            params = cam.getParameters();
            List<String> flashModes = params.getSupportedFlashModes();
            if (flashModes != null && flashModes.contains(Camera.Parameters.FLASH_MODE_TORCH))
                params.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
            else
                params.setFlashMode(Camera.Parameters.FLASH_MODE_ON);
            cam.setParameters(params);
            cam.setPreviewTexture(new SurfaceTexture(0));
            cam.startPreview();
            cam.autoFocus(new Camera.AutoFocusCallback() { public void onAutoFocus(boolean success, Camera cam) {} });
        }
        catch (Exception e)
        {
            Log.d("Example", "Torch.on: could not release camera");
        }
    }

    public void off()
    {
        try
        {
            params = cam.getParameters();
            params.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
            cam.setParameters(params);
            cam.stopPreview();
            cam.release();
        }
        catch (Exception e)
        {
            Log.d("Example", "Torch.off: could not acquire camera");
        }
    }
}