获取当前APN，更改APN

1.获取APN

ConnectivityManager conManager =    (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);  NetworkInfo ni = conManager.getActiveNetworkInfo(); //获取网络接入点，中国移动:cmwap和cmnet; 中国电信ctwap，ctnetString apn = ni.getExtraInfo();

获取接入点方式，需要权限:

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>

2.如何更改APN接入点呢?

//---->android4.0 后无法修改APNpublic int updateCurrentAPN(ContentResolver resolver, String newAPN) {         Cursor cursor = null;         try {             //get new apn id from list 4.2后只限系统应用有权限使用(query当前APN)            cursor = resolver.query(APN_LIST_URI, null, " apn = ? and current = 1", new String[]{newAPN.toLowerCase()}, null);             String apnId = null;             if (cursor != null && cursor.moveToFirst()) {                 apnId = cursor.getString(cursor.getColumnIndex("_id"));             }             cursor.close();                         //set new apn id as chosen one             if (apnId != null) {                 ContentValues values = new ContentValues();                 values.put("apn_id", apnId);                 resolver.update(CURRENT_APN_URI, values, null, null);                                 //通知apn已经更改                IntentFilter upIntentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);                 registerReceiver(new NetworkChangeReceiver (), upIntentFilter);                              } else {                 //apn id not found, return 0.                 return 0;             }         } catch (SQLException e) {         } finally {             if (cursor != null) {                 cursor.close();             }         }                 //update success         return 1; }

更改APN需要的权限为:

<uses-permission android:name="android.permission.WRITE_APN_SETTINGS"></uses-permission>

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