Android中判断详细的网络

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package com.example.networkjudgewangluopanduan;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.os.Bundle;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.telephony.TelephonyManager;import android.util.Log;import android.widget.Toast;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        checkMobileNet();    }    public void checkMobileNet() {        // 1.检测手机是否处于联网状态        // 1.得到系统服务ConnectivityManager        ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);        // 2.得到网络信息类对象        NetworkInfo networkInfo = manager.getActiveNetworkInfo();        // 3.进行判断        if (networkInfo != null && networkInfo.isConnected()) {            Toast.makeText(this, "已连接互联网!",Toast.LENGTH_LONG).show();            // 检测手机的网络类型            int type = networkInfo.getType();// 得到网络类型            switch (type) {                case ConnectivityManager.TYPE_WIFI:// wifi网络                    Toast.makeText(this, "wifi!",Toast.LENGTH_LONG).show();                    break;                case ConnectivityManager.TYPE_MOBILE:// 移动数据                    Toast.makeText(this, "移动数据!",Toast.LENGTH_LONG).show();                    // 2g 3g 4g                    getDetailMobileNetType(networkInfo);                    break;            }        } else {            Toast.makeText(this, "未连接互联网!" ,Toast.LENGTH_LONG).show();            AlertDialog.Builder buider=new AlertDialog.Builder(this);            buider.setTitle("网络连接设置");            buider.setMessage("未连接网络，是否要进行设置？");            buider.setPositiveButton("设置", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface arg0, int arg1) {                    //跳转到系统设置网络的界面                    Intent intent=new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);                    startActivity(intent);                }            });            buider.setNegativeButton("取消",  new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface arg0, int arg1) {                }            });            buider.create().show();        }    }    // 得到详细的网络类型 wap 2G/3G/4G网络    public void getDetailMobileNetType(NetworkInfo netInfo) {        String strNetworkType = "";        // 得到整数类型        int subtype = netInfo.getSubtype();        // 得到名子        String _strSubTypeName = netInfo.getSubtypeName();        switch (subtype) {            case TelephonyManager.NETWORK_TYPE_GPRS:// 联通2G            case TelephonyManager.NETWORK_TYPE_EDGE:// 移动2G            case TelephonyManager.NETWORK_TYPE_CDMA:// 电信2G            case TelephonyManager.NETWORK_TYPE_1xRTT:            case TelephonyManager.NETWORK_TYPE_IDEN: // api<8 : replace by 11                strNetworkType = "2G";                break;            case TelephonyManager.NETWORK_TYPE_UMTS:            case TelephonyManager.NETWORK_TYPE_EVDO_0:            case TelephonyManager.NETWORK_TYPE_EVDO_A:            case TelephonyManager.NETWORK_TYPE_HSDPA:            case TelephonyManager.NETWORK_TYPE_HSUPA:            case TelephonyManager.NETWORK_TYPE_HSPA:            case TelephonyManager.NETWORK_TYPE_EVDO_B: // api<9 : replace by 14            case TelephonyManager.NETWORK_TYPE_EHRPD: // api<11 : replace by 12            case TelephonyManager.NETWORK_TYPE_HSPAP: // api<13 : replace by 15                strNetworkType = "3G";                break;            case TelephonyManager.NETWORK_TYPE_LTE: // api<11 : replace by 13                strNetworkType = "4G";                break;            default:                // http://baike.baidu.com/item/TD-SCDMA 中国移动 联通 电信 三种3G制式                if (_strSubTypeName.equalsIgnoreCase("TD-SCDMA")                        || _strSubTypeName.equalsIgnoreCase("WCDMA")                        || _strSubTypeName.equalsIgnoreCase("CDMA2000")) {                    strNetworkType = "3G";                } else {                    strNetworkType = _strSubTypeName;                }                break;        }        Log.d("zzz", "网络类型是：" + strNetworkType);    }}
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