项目用的是全志T3 Android4.4平台,首先在系统中增加专用apn,在android\out\target\product\XXX\system\etc目录下,可以看到apns-conf.xml配置文件,这就是android系统里面的默认所有apn列表,源码则在android/device/softwinner/common/rild/apns-conf_sdk.xml 中修改,将新增的专用apn增加到这文件里即可。源码中加载所有apn是在android/package/providers/TelephonyProvider/src/com/android/providers/telephony/TelephonyProvider.java加载:
/*
* Loads apns from xml file into the database
*
* @param db the sqlite database to write to
* @param parser the xml parser
*
*/
private void loadApns(SQLiteDatabase db, XmlPullParser parser) {
if (parser != null) {
try {
db.beginTransaction();
XmlUtils.nextElement(parser);
while (parser.getEventType() != XmlPullParser.END_DOCUMENT) {
ContentValues row = getRow(parser);
if (row == null) {
throw new XmlPullParserException("Expected 'apn' tag", parser, null);
}
insertAddingDefaults(db, CARRIERS_TABLE, row);
XmlUtils.nextElement(parser);
}
db.setTransactionSuccessful();
} catch (XmlPullParserException e) {
Log.e(TAG, "Got XmlPullParserException while loading apns.", e);
} catch (IOException e) {
Log.e(TAG, "Got IOException while loading apns.", e);
} catch (SQLException e) {
Log.e(TAG, "Got SQLException while loading apns.", e);
} finally {
db.endTransaction();
}
}
}
这方法将解释出一个个apn,然后能过insertAddingDefaults把apn存储到数据库中,也就是我们可以在使用专用网络的时候,在这方法做动作,除专用网络对应的apn入库,其余不入库即可:
private void insertAddingDefaults(SQLiteDatabase db, String table, ContentValues row) {
// Initialize defaults if any
if (row.containsKey(Telephony.