Android 9.0 修改WLAN热点名称为MAC地址后四位

这个需求主要是读取mac地址,mac地址一般是用写号工具写入到NVRAM,所以需要从NVRAM读取准确的地址。

• 导入nvram操作用到的库：

frameworks/opt/net/wifi/service/Android.mk

LOCAL_STATIC_JAVA_LIBRARIES := \vendor.mediatek.hardware.nvram-V1.0-java

• 读取wifi mac地址并设置热点名称和密码：

frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiApConfigStore.java

//mh.add
import vendor.mediatek.hardware.nvram.V1_0.INvram;
import android.os.RemoteException;
//mh.endprivate WifiConfiguration getDefaultApConfiguration() {WifiConfiguration config = new WifiConfiguration();config.apBand = WifiConfiguration.AP_BAND_2GHZ;//mh.@{/*config.SSID = mContext.getResources().getString(R.string.wifi_tether_configure_ssid_default) + "_" + getRandomIntForDefaultSsid();*/String mMac = getMacAddress();mMac = mMac.replace(":", "");mMac = mMac.substring(mMac.length() - 4, mMac.length());config.SSID = "CloboticsAP_" + mMac;//mh.@}config.allowedKeyManagement.set(KeyMgmt.WPA2_PSK);String randomUUID = UUID.randomUUID().toString();//first 12 chars from xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxxconfig.preSharedKey = "Cbs_123456";/*randomUUID.substring(0, 8) + randomUUID.substring(9, 13);*///mh.modifyreturn config;
}//mh.add
private static final String DEFAULT_MAC_ADDRESS = "01:02:03:04:05:06";
private static final String MAC_ADDRESS_FILENAME = "/mnt/vendor/nvdata/APCFG/APRDEB/WIFI";
private static final int MAC_ADDRESS_OFFSET = 4;
private static final int MAC_ADDRESS_DIGITS = 6;
//读取mac地址的方法
public String getMacAddress() {String result = DEFAULT_MAC_ADDRESS;StringBuffer nvramBuf = new StringBuffer();try {int i = 0;String buff = null;INvram agent = INvram.getService();if (agent != null) {buff = agent.readFileByName(MAC_ADDRESS_FILENAME, MAC_ADDRESS_OFFSET + MAC_ADDRESS_DIGITS);// Log.i(TAG, "Raw data:" + encryptMessage(buff));if (buff.length() >= 2 * (MAC_ADDRESS_OFFSET + MAC_ADDRESS_DIGITS)) {// Remove the \0 special character.int macLen = buff.length() - 1;for (i = MAC_ADDRESS_OFFSET * 2; i < macLen; i += 2) {if ((i + 2) < macLen) {nvramBuf.append(buff.substring(i, i + 2));nvramBuf.append(":");} else {nvramBuf.append(buff.substring(i));}}result = nvramBuf.toString();} else {Log.e(TAG, "Fail to read mac address");}} else {Log.e(TAG, "Nvram is null");}} catch (RemoteException e) {e.printStackTrace();}if (result.length() > DEFAULT_MAC_ADDRESS.length()) {// remove extra characters if length longer than expectedresult = result.substring(0, DEFAULT_MAC_ADDRESS.length());} else if (result.length() < DEFAULT_MAC_ADDRESS.length()) {// set to default if length shorted than expectedresult = DEFAULT_MAC_ADDRESS;}//Log.d(TAG, "result: " + encryptMessage(result));return result;
}
//mh.add end