哪位高手能帮本人看一下，监听类就是当前activity,sdk版本是分别是16和17.小弟刚开始学安卓，很多都不太懂，希望高手帮忙解答一下。
public class MainActivity extends FragmentActivity implements
OnPageChangeListener, OnCheckedChangeListener,
NsdManager.DiscoveryListener,NsdManager.ResolveListener,
NsdManager.RegistrationListener
{
private ViewPager pager;
private MainPageAdapter adapter;
public List<Fragment> fragments;
private RadioGroup group;
private RadioButton button0, button1, button2,button3;
private NsdManager mNsdManager;
private NsdManager.ResolveListener mResolveListener;
private String TAG = "NSD_LOG ";
private boolean isDescovering = false;
public boolean backtoroot = false;
public HashMap<String,Fragment> fragmentsMap = new HashMap<String,Fragment>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragments = new ArrayList<Fragment>();
fragments.add(new Fragment_A());
fragments.add(new ColorSelectOneActivity());
fragments.add(new Fragment_C());
fragments.add(new Fragment_D());
pager = (ViewPager) findViewById(R.id.pager);
adapter = new MainPageAdapter(getSupportFragmentManager(), fragments);
pager.setAdapter(adapter);
pager.setOffscreenPageLimit(fragments.size() - 1);
pager.setOnPageChangeListener(this);
group = (RadioGroup) findViewById(R.id.radioGroup1);
button0 = (RadioButton) findViewById(R.id.radio0);
button1 = (RadioButton) findViewById(R.id.radio1);
button2 = (RadioButton) findViewById(R.id.radio2);
button3 = (RadioButton) findViewById(R.id.radio3);
group.setOnCheckedChangeListener(this);
WifiSwitcher wifiSwitcher = new WifiSwitcher();
fragmentsMap.put("wifi_switcher",wifiSwitcher);
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork().penaltyLog().build());
StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectLeakedSqlLiteObjects().detectLeakedClosableObjects().penaltyLog().penaltyDeath().build());
//自动连接，先判断能否是AP，假如不是则连接mdns
AppDelegate delegate = (AppDelegate)getApplication();
try {
Socket socket = new Socket("192.168.1.1", 5001);
delegate.put("host","192.168.1.1");
delegate.put("port", 5001);
} catch (Exception e) {
e.printStackTrace();
// 开始自动发现网络服务
// 获取nsdmanager
try {
mNsdManager = (NsdManager)getSystemService(NSD_SERVICE);
//
// NsdServiceInfo serviceInfo = new NsdServiceInfo();
// serviceInfo.setServiceName("WokeSmart");
// serviceInfo.setServiceType("_socket._tcp");
// serviceInfo.setPort(5001);
//
//
// serviceInfo.setHost(InetAddress.getLocalHost());
//开始发现
// mNsdManager.discoverServices("_ipp._tcp.", mNsdManager.PROTOCOL_DNS_SD, this);
// mNsdManager.discoverServices("_http._tcp", mNsdManager.PROTOCOL_DNS_SD, this);
// mNsdManager.discoverServices("_socket._tcp.local", mNsdManager.PROTOCOL_DNS_SD, this);
mNsdManager.discoverServices("_socket._tcp", mNsdManager.PROTOCOL_DNS_SD, this);
// mNsdManager.registerService(serviceInfo,mNsdManager.PROTOCOL_DNS_SD,this);
}catch (Exception e1)
{
e1.printStackTrace();
}
}
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
Log.v("asdf", "onPageScrollStateChanged");
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
// Log.v("asdf", "onPageScrolled");
}
@Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
Log.v("asdf", "onPageSelected");
getTabState(arg0);
}
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch (checkedId) {
case R.id.radio0:
pager.setCurrentItem(0);
break;
case R.id.radio1:
pager.setCurrentItem(1);
break;
case R.id.radio2:
pager.setCurrentItem(2);
break;
case R.id.radio3:
pager.setCurrentItem(3);
break;
default:
break;
}
}
private void getTabState(int index) {
// TODO Auto-generated method stub
button0.setChecked(false);
button1.setChecked(false);
button2.setChecked(false);
button3.setChecked(false);
switch (index) {
case 0:
button0.setChecked(true);
break;
case 1:
button1.setChecked(true);
break;
case 2:
button2.setChecked(true);
break;
case 3:
button3.setChecked(true);
break;
default:
break;
}
}
public void onKeyBack(int i)
{
if (i>0)
i--;
else
return;
if (pager.getCurrentItem()==0)
{
Fragment_A fragment_a = (Fragment_A)fragments.get(pager.getCurrentItem());
ArrayList<Fragment> backStack = fragment_a.backStack;
if (backStack.size()==1)
{
getSupportFragmentManager().beginTransaction().hide(backStack.get(backStack.size()-1)).commit();
}
else
{
getSupportFragmentManager().beginTransaction().hide(backStack.get(backStack.size()-1)).show(backStack.get(backStack.size()-2)).commit();
}
backStack.remove(backStack.size()-1);
}
else if (pager.getCurrentItem()==1)
{
ColorSelectOneActivity fragment_b = (ColorSelectOneActivity)fragments.get(pager.getCurrentItem());
ArrayList<Fragment> backStack = fragment_b.backStack;
if (backStack.size()==1)
{
getSupportFragmentManager().beginTransaction().hide(backStack.get(backStack.size()-1)).commit();
}
else
{
getSupportFragmentManager().beginTransaction().hide(backStack.get(backStack.size()-1)).show(backStack.get(backStack.size()-2)).commit();
}
backStack.remove(backStack.size()-1);
}
onKeyBack(i);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK
&& event.getRepeatCount() == 0) {
onKeyBack(1);
return true;
}
return super.onKeyDown(keyCode, event);
}
/**
* 设备像素(dip,dp)转屏幕像素(px)
* px就是像素，假如用px,就会用实际像素画，比个如吧，用画一条长度为240px的横线，在480宽的模拟器上看就是一半的屏宽，而在320宽的模拟器上看就是2／3的屏宽了。
* 而dip，就是把屏幕的高分成480分，宽分成320分。例如你做一条160dip的横线，无论你在320还480的模拟器上，都是一半屏的长度。
* @param context
* @param dipValue
* @return
*/
public static int dip2px(Context context, float dipValue){
final float scale = context.getResources().getDisplayMetrics().density;
return (int)(dipValue * scale + 0.5f);
}
/**
* 将px值转换为sp值，保证文字大小不变
*
* @param pxValue
* @param pxValue
* （DisplayMetrics类中属性scaledDensity）
* @return
*/
public static int px2sp(Context context, float pxValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (pxValue / fontScale + 0.5f);
}
/**
* 将sp值转换为px值，保证文字大小不变
*
* @param spValue
* @param spValue
* （DisplayMetrics类中属性scaledDensity）
* @return
*/
public static int sp2px(Context context, float spValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (spValue * fontScale + 0.5f);
}
//实现网络发现接口
// Called as soon as service discovery begins.
@Override
public void onDiscoveryStarted(String regType) {
Log.d(TAG, "Service discovery started");
isDescovering = true;
}
@Override
public void onServiceFound(NsdServiceInfo service) {
// A service was found! Do something with it.
if (service.getServiceName().contains("WokeSmart")) {
// Service type is the string containing the protocol and
// transport layer for this service.
Log.d(TAG, "WokeSmart device found");
mNsdManager.resolveService(service, this);
}
}
@Override
public void onServiceLost(NsdServiceInfo service) {
// When the network service is no longer available.
// Internal bookkeeping code goes here.
Log.e(TAG, "service lost" + service);
}
@Override
public void onDiscoveryStopped(String serviceType) {
Log.i(TAG, "Discovery stopped: " + serviceType);
}
@Override
public void onStartDiscoveryFailed(String serviceType, int errorCode) {
Log.e(TAG, "Discovery failed: Error code:" + errorCode);
mNsdManager.stopServiceDiscovery(this);
}
@Override
public void onStopDiscoveryFailed(String serviceType, int errorCode) {
Log.e(TAG, "Discovery failed: Error code:" + errorCode);
mNsdManager.stopServiceDiscovery(this);
}
@Override
public void onServiceResolved(NsdServiceInfo arg0) {
// 可以再这里获取相应网络服务的地址及端口信息，然后决定能否要与之建立连接。
// 之后就是一些socket操作了
//获取IP
arg0.getHost();
//获取端口
arg0.getPort();
AppDelegate delegate = (AppDelegate)getApplication();
delegate.put("host", arg0.getHost().getAddress());
delegate.put("port", arg0.getPort());
}
@Override
public void onResolveFailed(NsdServiceInfo arg0, int arg1) {
Log.e(TAG, "ResolveFailed failed: Error code:" + arg1);
mNsdManager.stopServiceDiscovery(this);
}
@Override
public void onRegistrationFailed(NsdServiceInfo serviceInfo, int errorCode) {
Log.e(TAG, "register failed" + errorCode);
}
@Override
public void onUnregistrationFailed(NsdServiceInfo serviceInfo, int errorCode) {
Log.e(TAG, "unregister failed" + errorCode);
}
@Override
public void onServiceRegistered(NsdServiceInfo serviceInfo) {
Log.e(TAG, "registed");
}
@Override
public void onServiceUnregistered(NsdServiceInfo serviceInfo) {
Log.e(TAG, "unregisted");
}
}
解决方案：20分
应该不是重启，而是虚拟机挂掉了
解决方案：80分
大哥,你写的代码也太坑了..你这桌子项目本人在接手,求指导决这个NsdManager – –
CodeBye 版权所有丨如未注明 , 均为原创丨本网站采用BY-NC-SA协议进行授权 , 转载请注明调用NsdService相关api导致手机重启（随机）！
