package com.android.settings.widget;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.BaseColumns;
/**
* Utility class for changing APN state
*/
public class ApnUtils { private static final String SUFFIX_APN = "_suffix_apn"; // type 1
private static final String MMS = "mms";
private static final String COLUMN_ID = BaseColumns._ID;
private static final String COLUMN_APN = "apn";
private static final String COLUMN_TYPE = "type";
private static final String COLUMN_APN_ID = "apn_id"; // for preferred APN
private static final String[] PROJECTION = new String[] { COLUMN_ID, COLUMN_APN, COLUMN_TYPE };
private static final Uri CURRENT_APNS = Uri
.parse("content://telephony/carriers/current"); private static final Uri PREFERRED_APN = Uri
.parse("content://telephony/carriers/preferapn");
/**
* Gets the state of APN
*
* @param context
* @return true if enabled
*/
public static boolean getApnState(Context context) {
ContentResolver resolver = context.getContentResolver();
int counter = 0;
Cursor cursor = null;
try { cursor = resolver.query(CURRENT_APNS, PROJECTION, null, null, null);
int typeIndex = cursor.getColumnIndex(COLUMN_TYPE);
cursor.moveToNext();
while (!cursor.isAfterLast()) { String type = cursor.getString(typeIndex);
if (isDisabled(type)) { return false; // no need to continue
}
if (!isMms(type) || /* this is MMM and we */shouldDisableMms()) { counter++;
}
cursor.moveToNext();
}
} finally { if (cursor != null) { cursor.close();
}
}
return counter != 0;
}
private static boolean isMms(String type) { return type != null && type.toLowerCase().endsWith(MMS);
}
private static boolean shouldDisableMms() { // TODO Auto-generated method stub
return false;
}
private static boolean isDisabled(String value) { return value != null && value.endsWith(SUFFIX_APN);
}
/**
* Set APN State
*
* @param context
* @param enabled
*/
public static void setApnState(Context context, boolean enabled) { boolean shouldDisableMms = shouldDisableMms();
ContentResolver resolver = context.getContentResolver();
ContentValues values = new ContentValues();
Cursor cursor = null;
String[] args = new String[1];
try { // COLUMN_ID{0}, COLUMN_APN{1}, COLUMN_TYPE{2} cursor = resolver.query(CURRENT_APNS, PROJECTION, null, null, null);
int idIndex = cursor.getColumnIndex(COLUMN_ID);
int apnIndex = cursor.getColumnIndex(COLUMN_APN);
int typeIndex = cursor.getColumnIndex(COLUMN_TYPE);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
String typeValue = cursor.getString(typeIndex);
if (!enabled // we should disable
&& isMms(typeValue) // and this is MMS
&& !shouldDisableMms) { // but users disallow us to // disable MMS
// ignore
cursor.moveToNext();
continue;
}
args[0] = String.valueOf(cursor.getInt(idIndex)); // id
values.put(COLUMN_APN, getAdaptedValue(cursor.getString(apnIndex), enabled));
values.put(COLUMN_TYPE, getAdaptedValue(typeValue, enabled));
resolver.update(CURRENT_APNS, values, COLUMN_ID + "=?", args);
// move to next
cursor.moveToNext();
}
} catch (Exception e) { throw new RuntimeException(e);
} finally { if (cursor != null) { cursor.close();
}
}
}
private static String getAdaptedValue(String value, boolean enable) {
final String modifier = SUFFIX_APN;
// handle null-value
if (value == null) return enable ? value : modifier;
// remove any modifier so that value becomes enabled in any case
value = removeModifiers(value);
if (!enable) { // add required modifier value = addModifier(value);
}
return value;
}
private static String removeModifiers(String value) { if (value.endsWith(SUFFIX_APN))
return value.substring(0, value.length() - SUFFIX_APN.length());
else
return value;
}
private static String addModifier(String value) { return value + SUFFIX_APN;
}
}