Unable to start receiver (Package name).Class On Camera.open() - runtime-error

Question

Creating an widget to turn on and off Flash light
Getting Error on turning off flash light
My Widget Class Code
Code In onRecieve
#Override
public void onReceive(Context context, Intent intent)
{
super.onReceive(context, intent);
if(SYNC_CLICKED.equals(intent.getAction()))
{
AppWidgetManager appWidgetManager=AppWidgetManager.getInstance(context);
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget__flash);
ComponentName componentName=new ComponentName(context,Widget_Flash.class);
if(Allowed_Flash) {
if (!Flash_Light_On) {
getCamera();
Turn_On_Flash_Light();
views.setImageViewResource(R.id.Widget_On_Off_Button, R.drawable.button2);
Flash_Light_On = true;
} else {
views.setImageViewResource(R.id.Widget_On_Off_Button, R.drawable.button1);
getCamera();
Turn_Off_Flash_Light();
}
Flash_Light_On = false;
}
}
appWidgetManager.updateAppWidget(componentName, views);
}
}
Get Camera
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
}
}
}
Turn On
private void Turn_On_Flash_Light()
{
params.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
}
Turn Off
private void Turn_Off_Flash_Light()
{
params.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.startPreview();
camera.release();
}
Error
E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start receiver
io.farooq.flash_light.Widget_Flash: java.lang.NullPointerException
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2287)
at android.app.ActivityThread.access$1600(ActivityThread.java:140)
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1313)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4921)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at
io.farooq.flash_light.Widget_Flash.Turn_Off_Flash_Light(Widget_Flash.java:143)
at io.farooq.flash_light.Widget_Flash.onReceive(Widget_Flash.java:74)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2280)
at android.app.ActivityThread.access$1600(ActivityThread.java:140) 
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1313) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:4921) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:511) 
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 
at dalvik.system.NativeStart.main(Native Method)
In Samsung J5 Prime (API 23) Code is working fine But in Tried it in (API 16) & (API 19) Flash Is Turning On But getting error while turning off