android 網路實時監聽網路狀態變化 及 網路型別判斷
阿新 • • 發佈：2019-01-28
android 中 我們經常需要判斷 各種網路型別 然後需要給使用者做出相應的提示，一般網路型別有 2g ,3g,4g ,wifi，無網路等等。
1. 網路型別判斷
TelephonyManager 中 定義常量值public static final int NETWORK_TYPE_1xRTT = 7; public static final int NETWORK_TYPE_CDMA = 4; public static final int NETWORK_TYPE_EDGE = 2; public static final int NETWORK_TYPE_EHRPD = 14; public static final int NETWORK_TYPE_EVDO_0 = 5; public static final int NETWORK_TYPE_EVDO_A = 6; public static final int NETWORK_TYPE_EVDO_B = 12; public static final int NETWORK_TYPE_GPRS = 1; public static final int NETWORK_TYPE_HSDPA = 8; public static final int NETWORK_TYPE_HSPA = 10; public static final int NETWORK_TYPE_HSPAP = 15; public static final int NETWORK_TYPE_HSUPA = 9; public static final int NETWORK_TYPE_IDEN = 11; public static final int NETWORK_TYPE_LTE = 13; public static final int NETWORK_TYPE_UMTS = 3; public static final int NETWORK_TYPE_UNKNOWN = 0;
public static int getNetworkType(Context context) { ConnectivityManager connectMgr = (ConnectivityManager) context.getSystemService( Context.CONNECTIVITY_SERVICE); NetworkInfo info = connectMgr.getActiveNetworkInfo(); if (info != null) { if (info.getType() == ConnectivityManager.TYPE_MOBILE) { switch (info.getSubtype()) { case TelephonyManager.NETWORK_TYPE_CDMA: // telcom case TelephonyManager.NETWORK_TYPE_1xRTT: // telecom case TelephonyManager.NETWORK_TYPE_GPRS: // unicom case TelephonyManager.NETWORK_TYPE_EDGE: // cmcc return NETWORK_TYPE_2G; case TelephonyManager.NETWORK_TYPE_EHRPD: // telecom case TelephonyManager.NETWORK_TYPE_EVDO_0: // telecom case TelephonyManager.NETWORK_TYPE_EVDO_A: // telecom 3.5G case TelephonyManager.NETWORK_TYPE_EVDO_B: // telecom 3.5G case TelephonyManager.NETWORK_TYPE_HSPA: // unicom case TelephonyManager.NETWORK_TYPE_HSPAP: // unicom case TelephonyManager.NETWORK_TYPE_HSDPA: // unicom 3.5G case TelephonyManager.NETWORK_TYPE_HSUPA: // unicom 3.5G case TelephonyManager.NETWORK_TYPE_UMTS: // unicom return NETWORK_TYPE_3G; case TelephonyManager.NETWORK_TYPE_LTE: return NETWORK_TYPE_4G; } } else if (info.getType() == ConnectivityManager.TYPE_WIFI) { return NETWORK_TYPE_WIFI; } } return NETWORK_TYPE_NONE; }
public static final int NETWORK_TYPE_NONE = 0; public static final int NETWORK_TYPE_2G = 2; public static final int NETWORK_TYPE_3G = 3; public static final int NETWORK_TYPE_4G = 4; public static final int NETWORK_TYPE_WIFI = 10; private String getNetType() { int type = getNetworkType(mContext); String netType = ""; switch (type) { case Utils.NETWORK_TYPE_NONE: netType = ""; break; case Utils.NETWORK_TYPE_2G: netType = "2G"; break; case Utils.NETWORK_TYPE_3G: netType = "3G"; break; case Utils.NETWORK_TYPE_4G: netType = "4G"; break; case Utils.NETWORK_TYPE_WIFI: netType = "wifi"; break; } return netType; }
2.實時監聽網路切換
實現監聽網路的功能主要依靠 廣播監聽 。不多說 看程式碼。回撥中邏輯改成自己的就可以了。
oncreate中 需要註冊一下 廣播
mNetworkReceiver = new NetTypeReceiver();
registerReceiver(mNetworkReceiver, intent);
ondestory中需要將廣播銷燬
if (mNetworkReceiver != null) {
unregisterReceiver(mNetworkReceiver);
mNetworkReceiver = null;
}
private class NetTypeReceiver extends BroadcastReceiver {
String type = "";
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(
Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isAvailable()) {
String name = networkInfo.getTypeName();
switch (networkInfo.getType()) {
case 0://移動 網路
if (TextUtils.isEmpty(type)) {
type = name;
}
break;
case 1:wifi網路
if (TextUtils.isEmpty(type)) {
type = name;
}
break;
}
} else {// 無網路
//network was unavailable, stop the streamer, and show a dialog
showNetworkInvalidView(R.string.network_error_message);
type = "";
}
}
}
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