Android：布尔变化的监听器

Question

I know that there is a lot of examples, but I can't still make it work.

I need to monitor Boolean value, which change to True, when phone is connected to proper wifi. Wifi connection and check is done in second thread. Maybe there is problem? I've tried many solutions, and can't get it done.

Wrapper class for variable:

import java.util.ArrayList;
import java.util.List;



public class ConnectivityStatus {
    private Boolean status = Boolean.FALSE;
    private ConnectivityListener listener;

    public Boolean getStatus(){
        return status;
    }

    public void setStatus(Boolean status){
        this.status = status;
        if(status) {
            listener.onChange();
        }
    }

    public void addConnectivityListener(ConnectivityListener l) {
        this.listener = l;
    }

    interface ConnectivityListener{
        void onChange();
    }

}

MainActivity:

public class MainActivity extends AppCompatActivity {

    ...
    private ConnectivityStatus mConnectionStatus;
    ...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ...
        mConnectionStatus = new ConnectivityStatus();
        ...

        connectButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startLoadingScreen();
                connectToCamera(mWifiManager);


                new Thread(new Runnable() {
                    public void run() {
                        long startTime = System.currentTimeMillis();
                        for(int i = 0; i<=6; i++) {
                            mConnectionStatus.setStatus(checkWifiSsid(mWifiManager, startTime));
                            if(mConnectionStatus.getStatus()) {
                                break;
                            }
                        }
                    }
                });
            }
        });

        mConnectionStatus.addConnectivityListener(new ConnectivityStatus.ConnectivityListener() {
            @Override
            public void onChange(){
                openWebView();
            }
        });


    }

Answer 1

I didn't notice earlier but, yes, you're missing something from your threading. You're creating a new thread but you're not telling it to start:

new Thread(new Runnable(){
    public void run(){
        // Optionally, you can also use log messages for debugging
        Log.d("MY_LOG_TAG", "Some message to look for in the log.");

        // ...
    }
}).start(); // Make sure to tell it to start