android 如何分辨移动wap网络，3G网络，WIFI网络

1. 有直接的api来分辨：
3. ConnectivityManager connectivityManager=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
   
4. try{
   
5. ConnectivityManager connectivityManager=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
   
6. if(connectivityManager!=null){
   
7. NetworkInfo networkInfo= connectivityManager.getActiveNetworkInfo();
   
8. 
   
9. if(networkInfo!=null){
   
10. netType = networkInfo.getType();
    
11. Log.d("Log","connetion is available");
    
12. }else{
    
13. Log.d("Log","connetion is not available");
    
14. return networkStatus;
    
15. }
    
16. 
    
17. // if(networkInfo.isAvailable()){ // Old one
18. 1. if(networkInfo.isAvailable()&& networkInfo.isConnected()){// New change added here
       
    2. if(netType==ConnectivityManager.TYPE_WIFI)
       
    3. {}
       
    4. elseif(netType==ConnectivityManager.TYPE_MOBILE)
       
    5. {}
       
    6. }
       
    7. }
       
    8. }catch(Exception e){
       
    9. Log.d("Log","checkNetworkConnection"+ e.toString());
       
    10. return networkStatus;