在Android中,获取网络制式可以通过TelephonyManager类来实现,以下是详细的步骤和小标题:
需要在AndroidManifest.xml文件中添加访问电话服务的权限:
<usespermission android:name="android.permission.ACCESS_NETWORK_STATE" />
<usespermission android:name="android.permission.READ_PHONE_STATE" />
在需要获取网络制式的Activity或Fragment中,通过以下方式获取TelephonyManager实例:
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
使用TelephonyManager的getNetworkType()方法可以获取当前连接的网络制式,该方法返回一个整数值,表示网络制式的类型,以下是常见的网络制式及其对应的整数值:
网络制式 | 整数值 |
---|---|
GSM | 0 |
CDMA | 1 |
WCDMA | 2 |
LTE | 4 |
EvDO | 5 |
HSPA+ | 6 |
HSPA | 7 |
HSPAPRoaming | 8 |
GSM/UMTS/HSPA+/DCHSDPA/HSUPA | 9 |
GSM/UMTS/LTE/CDMA/EvDo/HSPA+/HSDPA/HSUPA | 10 |
根据获取到的整数值,可以将网络制式转换为相应的名称,以下是将整数值转换为网络制式的示例代码:
int networkType = telephonyManager.getNetworkType();
String networkTypeName = "未知";
switch (networkType) {
case TelephonyManager.NETWORK_TYPE_GPRS:
networkTypeName = "GSM";
break;
case TelephonyManager.NETWORK_TYPE_EDGE:
networkTypeName = "EDGE";
break;
case TelephonyManager.NETWORK_TYPE_CDMA:
networkTypeName = "CDMA";
break;
case TelephonyManager.NETWORK_TYPE_EVDO_0:
case TelephonyManager.NETWORK_TYPE_EVDO_A:
networkTypeName = "EVDO";
break;
case TelephonyManager.NETWORK_TYPE_HSPAP:
networkTypeName = "HSPA+";
break;
case TelephonyManager.NETWORK_TYPE_HSDPA:
networkTypeName = "HSDPA";
break;
case TelephonyManager.NETWORK_TYPE_HSUPA:
networkTypeName = "HSUPA";
break;
case TelephonyManager.NETWORK_TYPE_UMTS:
networkTypeName = "UMTS";
break;
case TelephonyManager.NETWORK_TYPE_UNKNOWN:
networkTypeName = "未知";
break;
default:
networkTypeName = "未知";
break;
}
网络制式 | 获取方法 |
---|---|
2G (GSM/EDGE) | TelephonyManager.NETWORK_TYPE_GPRS 或 TelephonyManager.NETWORK_TYPE_EDGE |
3G (UMTS) | TelephonyManager.NETWORK_TYPE_UMTS |
4G (LTE) | TelephonyManager.NETWORK_TYPE_LTE |
5G | TelephonyManager.NETWORK_TYPE_NR (需要Android API 29+) |
以下是相关代码示例:
import android.telephony.TelephonyManager;
// 获取TelephonyManager实例
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
// 获取网络类型
int networkType = telephonyManager.getNetworkType();
// 根据不同的网络类型进行判断
switch (networkType) {
case TelephonyManager.NETWORK_TYPE_GPRS:
case TelephonyManager.NETWORK_TYPE_EDGE:
// 2G网络
break;
case TelephonyManager.NETWORK_TYPE_UMTS:
// 3G网络
break;
case TelephonyManager.NETWORK_TYPE_LTE:
// 4G网络
break;
case TelephonyManager.NETWORK_TYPE_NR: