我在Android v4.2中读取APNs时遇到了问题(是读取而不是写入APNS),它会抛出一个安全异常:
没有写入APN设置的权限:用户10068和当前进程都没有android.permission.WRITE_APN_SETTINGS权限。
相同的代码在所有先前的平台上都可以工作,请问有没有任何方法来解决这个问题?
谢谢!
Cursor c = getContentResolver().query(Uri.withAppendedPath(Telephony.Carriers.CONTENT_URI, "current"), null, null, null, null);
对于 Android 4.2 及以上版本,请使用以下代码:
private static final String[] APN_PROJECTION = {
Telephony.Carriers.TYPE, // 0
Telephony.Carriers.MMSC, // 1
Telephony.Carriers.MMSPROXY, // 2
Telephony.Carriers.MMSPORT // 3
};
并且这一行:
final Cursor apnCursor =SqliteWrapper.query(context, this.context.getContentResolver(), Uri.withAppendedPath(Carriers.CONTENT_URI, "current"), APN_PROJECTION, null, null, null);
SQLiteWrapperClass被隐藏了(在互联网上发现了这个类)
import android.database.sqlite.SqliteWrapper;
我的英语不太好,对此感到抱歉。
private boolean getSettingsFromApnsFile(Context context, String apnName) {
FileReader reader = null;
boolean sawValidApn = false;
try {
reader = new FileReader("/etc/apns-conf.xml");
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput(reader);
TelephonyManager telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
String simOperator = telephonyManager.getSimOperator();
if (TextUtils.isEmpty(simOperator)) {
logger.warn("unable to get sim operator - so unable to get mms config");
return false;
}
int eventType = xpp.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG && xpp.getName().equals("apn")) {
HashMap<String, String> attributes = new HashMap<String, String>();
for (int i=0; i<xpp.getAttributeCount(); i++) {
attributes.put(xpp.getAttributeName(i), xpp.getAttributeValue(i));
}
if (attributes.containsKey("mcc") && attributes.containsKey("mnc") && simOperator.equals(attributes.get("mcc")+attributes.get("mnc"))) {
if (!TextUtils.isEmpty(apnName) && !apnName.trim().equals(attributes.get("apn"))) {
eventType = xpp.next();
continue;
}
if (isValidApnType(attributes.get("type"), PhoneConstants.APN_TYPE_MMS)) {
sawValidApn = true;
String mmsc = attributes.get("mmsc");
if (mmsc == null) {
eventType = xpp.next();
continue;
}
mServiceCenter = NetworkUtil.trimV4AddrZeros(mmsc.trim());
mProxyAddress = NetworkUtil.trimV4AddrZeros(
attributes.get("mmsproxy"));
if (isProxySet()) {
String portString = attributes.get("mmsport");
try {
mProxyPort = Integer.parseInt(portString);
} catch (NumberFormatException e) {
if (TextUtils.isEmpty(portString)) {
logger.warn("mms port not set!");
} else {
logger.error("Bad port number format: " + portString, e);
}
}
}
}
}
}
eventType = xpp.next();
}
} catch (Exception e) {
logger.warn("unable to get mmsc config from apns-conf file", e);
} finally {
if (reader != null) {
try {
reader.close();
} catch (Exception e) {
}
}
}
return sawValidApn;
}
@Override
protected void onResume() {
super.onResume();
//mWebView.loadUrl("file:///android_asset/95306.html");
new LoadUrlTask().execute("file:///android_asset/95306.html");
}
...
class LoadUrlTask extends AsyncTask<String, Integer , String> {
// progressDialog = new ProgressDialog(LoadActivity.this);
@Override
protected String doInBackground(String... strings) {
mWebView.loadUrl(strings[0]);
return "";
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
//progressDialog.dismiss();
}
@Override
protected void onPreExecute() {
super.onPreExecute();
//progressDialog.setMessage("loading...");
//progressDialog.show();
}
}
我通过以下方式修复它:
@Override
protected void onResume() {
super.onResume();
mWebView.loadUrl("file:///android_asset/95306.html");
//new LoadUrlTask().execute("file:///android_asset/95306.html");
}
READ_APN_SETTINGS
权限)。我没有看到对此问题进行的记录,如果你能创建一个可以重现该错误的项目,请将其发布在 http://b.android.com 上,并提供说明。 - CommonsWare