Question

我有一个包含四个标签的活动，这些标签由一个片段填充。在那个片段中我有四个开关。在运行时期间，我通过取消注册OncheckedChangeListener，然后更改其状态来以编程方式更改其状态，但我没有得到如何重新注册侦听器

这是代码

public class MainActivity extends AppCompatActivity {

private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
public static Fragment halFragment,bed1Fragment,bed2Fragment,kitFragment;
public static boolean hal_light1_flag=false,hal_light2_flag=false,hal_socket_flag=false,hal_fan_flag=false;
public static int hal_fanSpeed=2;
public static String location = "Hall";
int i;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    halFragment = new hallFragment();
    bed1Fragment = new hallFragment();
    bed2Fragment = new hallFragment();
    kitFragment = new kitchenFragment();

    toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    viewPager = (ViewPager) findViewById(R.id.viewpager);
    setupViewPager(viewPager);

    tabLayout = (TabLayout) findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(viewPager);
    connection.tcpClient.setDestination("hal");

    runThread();

    tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            int j = tab.getPosition();
            switch(j){
                case 0:
                    Log.d("tabs","Location hall");
                    location = "Hall";
                    connection.tcpClient.setDestination("hal");
                    break;

                case 1:
                    Log.d("tabs","Location bedroom1");
                    location = "Bedroom1";
                    connection.tcpClient.setDestination("be1");
                    break;

                case 2:
                    Log.d("tabs","Location bedroom2");
                    location = "Bedroom2";
                    connection.tcpClient.setDestination("be2");
                    break;

                case 3:
                    Log.d("tabs","Location kitchen");
                    location = "Kitchen";
                    connection.tcpClient.setDestination("kit");
                    break;

            }
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {

        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {

        }
    });
}

private void setupViewPager(ViewPager viewPager) {
    ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
    adapter.addFragment(halFragment, "HALL");
    adapter.addFragment(bed1Fragment, "ROOM1");
    adapter.addFragment(bed2Fragment, "ROOM2");
    adapter.addFragment(kitFragment, "KITCHEN");
    viewPager.setAdapter(adapter);
}

class ViewPagerAdapter extends FragmentPagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();

    public ViewPagerAdapter(FragmentManager manager) {
        super(manager);
    }

    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }

    @Override
    public int getCount() {
        return mFragmentList.size();
    }

    public void addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return mFragmentTitleList.get(position);
    }
}

private void runThread() {
    i = 0;
    new Thread() {
        public void run() {
            while (i++ < 1000) {
                try {
                    runOnUiThread(new Runnable() {

                        @Override
                        public void run() {
                            if(connection.tcpClient.status_flag) {
                                Log.d("status", "got Status");
                                connection.tcpClient.status_flag = false;
                                updateUI();
                            }
                        }
                    });
                    Thread.sleep(300);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }.start();
}

public void updateUI(){
    ((Switch)halFragment.getView().findViewById(R.id.lightSwitch)).setOnCheckedChangeListener(null);
    ((Switch)halFragment.getView().findViewById(R.id.lightSwitch)).setChecked(MainActivity.hal_light1_flag);
    ((Switch)halFragment.getView().findViewById(R.id.lightSwitch)).setOnCheckedChangeListener(/*what should be inserted here*/);

这里是片段代码

public class hallFragment extends Fragment implements CompoundButton.OnCheckedChangeListener, SeekBar.OnSeekBarChangeListener{

public static Switch light,cfl,socket,fan;
public SeekBar speed;
View view;

public static CompoundButton.OnCheckedChangeListener lightListener,cflListener,socketListener,fanListener;
SeekBar.OnSeekBarChangeListener speedListener;
int k;


public hallFragment() {
    // Required empty public constructor
}

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

@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

}

@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {

}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    view = inflater.inflate(R.layout.fragment_hall, container, false);

    light = (Switch) view.findViewById(R.id.lightSwitch);
    cfl = (Switch) view.findViewById(R.id.cflSwitch);
    socket = (Switch) view.findViewById(R.id.socketSwitch);
    fan = (Switch) view.findViewById(R.id.fanSwitch);

    speed = (SeekBar) view.findViewById(R.id.speedSeekbar);

    lightListener = new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean bChecked) {
            if(bChecked){
                Log.d("button",MainActivity.location +" light is on");
                connection.tcpClient.sendMessage("li1_1");
            }
            else{
                Log.d("Button",MainActivity.location +" light is off");
                connection.tcpClient.sendMessage("li1_0");
                speed.setProgress(0);
            }
        }
    };

    cflListener = new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean bChecked) {
            if(bChecked){
                Log.d("button",MainActivity.location + " cfl is on");
                connection.tcpClient.sendMessage("li2_1");
            }
            else{
                Log.d("Button",MainActivity.location + " cfl is off");
                connection.tcpClient.sendMessage("li2_0");
            }
        }
    };

    socketListener = new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean bChecked) {
            if(bChecked){
                Log.d("button",MainActivity.location + " socket is on");
                connection.tcpClient.sendMessage("soc_1");
            }
            else{
                Log.d("Button",MainActivity.location + " socket is off");
                connection.tcpClient.sendMessage("soc_0");
            }
        }
    };

    fanListener = new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean bChecked) {
            if(bChecked){
                Log.d("button",MainActivity.location + " fan is on");
                connection.tcpClient.sendMessage("fan_1");
            }
            else{
                Log.d("Button",MainActivity.location + " fan is off");
                connection.tcpClient.sendMessage("fan_0");
            }
        }
    };

    speedListener = new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
            k = i;
            Log.d("SeekBar","Progress Changed");
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            Log.d("SeekBar","started Touching");
        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            Log.d("SeekBar","Speed changed to " + Integer.toString(k));
            connection.tcpClient.sendMessage("fs_"+Integer.toString(k));
        }
    };

    light.setOnCheckedChangeListener(lightListener);
    cfl.setOnCheckedChangeListener(cflListener);
    socket.setOnCheckedChangeListener(socketListener);
    fan.setOnCheckedChangeListener(fanListener);
    speed.setOnSeekBarChangeListener(speedListener);
    return view;
}

}

Answer 1

((Switch)halFragment.getView().findViewById(R.id.lightSwitch))
        .setOnCheckedChangeListener(halFragment.lightListener);

如何在活动的片段中设置OnCheckedChangeListener

1 个答案: