网络状态监听

定义一个广播接收器和状态变化接口

1. publicclassNetBroadcastReceiverextendsBroadcastReceiver{
2. publicstaticArrayList<NetEventHandler> mListeners =newArrayList<NetEventHandler>();
3. privatestaticString NET_CHANGE_ACTION ="android.net.conn.CONNECTIVITY_CHANGE";
5. @Override
6. publicvoid onReceive(Context context,Intent intent){
7. Log.i("dsc","dsc");
8. if(intent.getAction().equals(NET_CHANGE_ACTION)){
9. MainActivity.mNetWorkState =NetUtil.getNetworkState(context);
10. if(mListeners.size()>0)//通知接口完成加载
11. for(NetEventHandler handler : mListeners){
12. handler.onNetChange();
13. }
14. }
15. }
17. publicinterfaceNetEventHandler{
18. publicvoid onNetChange();
19. }
20. }

网络状态工具类

1. publicclassNetUtil{
2. publicstaticfinalint NETWORN_NONE =0;
3. publicstaticfinalint NETWORN_WIFI =1;
4. publicstaticfinalint NETWORN_MOBILE =2;
6. publicstaticint getNetworkState(Context context){
7. ConnectivityManager connManager =(ConnectivityManager) context
8. .getSystemService(Context.CONNECTIVITY_SERVICE);
9. // Wifi
10. State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
11. .getState();
12. if(state ==State.CONNECTED || state ==State.CONNECTING){
13. return NETWORN_WIFI;
14. }
16. // 3G
17. state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
18. .getState();
19. if(state ==State.CONNECTED || state ==State.CONNECTING){
20. return NETWORN_MOBILE;
21. }
22. return NETWORN_NONE;
23. }
24. }

主要实现

1. publicclassMainActivityextendsAppCompatActivityimplementsNetBroadcastReceiver.NetEventHandler{
2. publicstaticint mNetWorkState;
3. privateNetBroadcastReceiver netReceiver;//网络状态监测
4. privateboolean netState =false;
6. @Override
7. protectedvoid onCreate(Bundle savedInstanceState){
8. super.onCreate(savedInstanceState);
9. setContentView(R.layout.activity_main);
10. //注册网络监听广播
11. regist();
12. }
14. @Override
15. publicvoid onDestroy(){
16. super.onDestroy();
17. Log.e("myLog","TaskListFragment执行销毁");
18. unregisterReceiver(netReceiver);
19. }
21. /**
22. * 注册广播
23. */
24. privatevoid regist(){
25. netReceiver =newNetBroadcastReceiver();
26. IntentFilter filter =newIntentFilter();
27. filter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
28. registerReceiver(netReceiver, filter);
29. NetBroadcastReceiver.mListeners.add(this);
30. }
32. @Override
33. publicvoid onNetChange(){
34. if(getApplicationContext()==null){
35. return;
36. }
37. if(NetUtil.getNetworkState(this)==NetUtil.NETWORN_NONE){//没有网络
38. netState =false;
39. Toast.makeText(this,"你的网络已断开连接,请检查网络！",Toast.LENGTH_SHORT).show();
40. }elseif(NetUtil.getNetworkState(this)==NetUtil.NETWORN_WIFI){//wifi网络
41. netState =true;
42. Toast.makeText(this,"你目前是wifi网络！",Toast.LENGTH_SHORT).show();
43. }else{//手机网络
44. netState =true;
45. Toast.makeText(this,"你目前是手机网络！",Toast.LENGTH_SHORT).show();
46. }
47. }
48. }

AndroidManifest注册

1. <receiverandroid:name=".NetBroadcastReceiver"/>

网络状态监听