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google提供的android2.3里面，只能在gsm/wcdma情况下才能从“设置”->“无线和网络”->“移动网络”->“接入点名称”中选择不同的apn帐号进行拨号连接，而cdma/evdo则没有这个功能。最近看了一下代码，简单实现了这个功能。
1、默认的cdma/evdo里面连apn列表都不显示，要先把这个挖出来。
修改packages/apps/phone/res/xml/cdma_options.xml
添加如下内容
<preferencescreen
android:key="button_apn_key"
android:title="@string/apn_settings"
android:persistent="false">
<intent android:action="android.intent.action.main"
android:targetpackage="com.android.settings"
android:targetclass="com.android.settings.apnsettings" />
</preferencescreen>
还有development/data/etc/apns-conf.xml的version值改为原来的加1，原因代码里面找。
2、修改frameworks/base/telephony/java/com/android/internal/telephony/cdma/cdmadataconnectiontracker.java的setupdata函数
private boolean setupdata(string reason) {
cdmadataconnection conn = findfreedataconnection();
if (conn == null) {
if (dbg) log("setupdata: no free cdmadataconnection found!");
return false;
}
mactivedataconnection = conn;
string[] types;
if (mrequestedapntype.equals(phone.apn_type_dun)) {
types = new string[1];
types[0] = phone.apn_type_dun;
} else {
types = mdefaultapntypes;
}
//mactiveapn = new apnsetting(0, "", "", "", "", "", "", "", "", "", "",
// 0, types, "ip", "ip");
uri preferred_apn_uri = uri.parse("content://telephony/carriers/preferapn");
contentresolver cresolver = phone.getcontext().getcontentresolver();
cursor cr = cresolver.query(preferred_apn_uri, null, null, null, null);
cr.movetofirst();
string user = cr.getstring(cr.getcolumnindex("user"));
string pass = cr.getstring(cr.getcolumnindex("password"));
string apn = cr.getstring(cr.getcolumnindex("apn"));
log.e(log_tag, "get apn : apn=" + apn + ", user=" + user + ", password=" + pass);
mactiveapn = new apnsetting(0, "", "", apn, "", "", "", "", "", user, pass,
, types, "ip", "ip");
message msg = obtainmessage();
msg.what = event_data_setup_complete;
msg.obj = reason;
conn.connect(msg, mactiveapn);
setstate(state.initing);
phone.notifydataconnection(reason);
return true;
}
3、修改frameworks/base/telephony/java/com/android/internal/telephony/cdma/cdmadataconnection.java的onconnect函数：
phone.mcm.setupdatacall(
integer.tostring(rilconstants.setup_data_tech_cdma),
integer.tostring(dataprofile),
//null, null, null, //原来传进拨号的参数都是空的！！！
cp.apn.apn, cp.apn.user, cp.apn.password,
integer.tostring(rilconstants.setup_data_auth_pap_chap),
rilconstants.setup_data_protocol_ip, msg);
4、修改frameworks/base/telephony/java/com/android/internal/telephony/gsm/apnsetting.java中对apnsetting的定义，将其成员类型全部设为public
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