Camera camera = null;

Parameters parameters = null;

Handler handler = new Handler() {

@Override

public void handleMessage(Message msg) {

// TODO Auto-generated method stub

super.handleMessage(msg);

}

};

// 主开启

public void start() {

handler.post(startThread);

handler.post(closeThread);

}

// 关闭

public void close() {

handler.removeCallbacks(startThread);

handler.removeCallbacks(closeThread);

flashclose();

camera.stopPreview();

camera.release();

camera = null;

}

private void flashopen() {//开启灯

if (camera == null) {

camera = Camera.open();

}

parameters = camera.getParameters();

parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);

camera.setParameters(parameters);

camera.startPreview();

}

private void flashclose() {//关闭灯

if (camera == null) {

camera = Camera.open();

}

parameters = camera.getParameters();

parameters.setFlashMode(Parameters.FLASH_MODE_OFF);

camera.setParameters(parameters);

}

Runnable startThread = new Runnable() {

// 将要执行的操作写在线程对象的run方法当中

public void run() {

System.out.println("updateThread");

flashopen();

try {

Thread.sleep(100);

flashclose();

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

handler.post(startThread);

}

};

Runnable closeThread = new Runnable() {

// 将要执行的操作写在线程对象的run方法当中

public void run() {

flashclose();

try {

Thread.sleep(100);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

handler.post(closeThread);

}

};