How to use ApplicationContext in Handler-CodePudding

i am really new to Android and i was trying to use the Thread class with a message handler, in there i need to use the ApplicationContext but when i try to run it it crashes, here is the code that makes the application crash

   if (!connected.isState()) {
                client = new MqttAndroidClient(myContext.context, SERVERURI, CLIENTID);
                try {
                    IMqttToken token = client.connect();
                    token.setActionCallback(new IMqttActionListener() {
                        @Override
                        public void onSuccess(IMqttToken asyncActionToken) {
                            //we are connected
                            connected.setState(true);
                        }

                        @Override
                        public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
                            //we are not connected
                        }
                    });
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return;    
           }

here is the myContext class

class myContext extends Application {

    public static Context context;

    @Override
    public void onCreate() {
        super.onCreate();
        context = getApplicationContext();
    }

} what can i do to fix the problem?

CodePudding user response：

You probably haven't told Android to use your custom Application class, so myContext.onCreate() isn't being called. To do this you need to add this to your <application> declaration in your manifest:

android:name=".myContext"

CodePudding user response：

OP here. in the end i solved it by sending a message containing the applicationContext in message.obj, here is the code now

if (!connected.isState()) {
            client = new MqttAndroidClient((Context) msg.obj, SERVERURI, CLIENTID);
            try {
                IMqttToken token = client.connect();
                token.setActionCallback(new IMqttActionListener() {
                    @Override
                    public void onSuccess(IMqttToken asyncActionToken) {
                        //we are connected
                        connected.setState(true);
                    }

                    @Override
                    public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
                        //we are not connected
                    }
                });
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return;
    }

thanks to everybody for the suggestions and for keeping up with my inexperience

:-)