Android 手电筒功能实现

1.使用carmear简单实现手电筒功能

初始值设置：

private Camera camera = null;
private boolean isOpen = false;

 onCreate中添加代码：

if (camera == null) {
    camera = Camera.open();
}

onDer中添加：

@Override
protected void onDestroy() {
	camera.release();
	camera = null;
	super.onDestroy();
}

 主要方法：

private void openFlashLight() {
	Camera.Parameters param = camera.getParameters();
	if (!isOpen) {
//            getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
		param.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
	} else {
		param.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
	}
	camera.setParameters(param);
	isOpen = !isOpen;
}