android 设置APN

android4.0之后，需要系统签名，并把apk放在system/app下面

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

 package com.lenovo.testapn;

 import android.app.Activity;
 import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Context;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.telephony.TelephonyManager;
 import android.util.Log;
 import android.view.Menu;

 public class MainActivity extends Activity {

     private static final String TAG = "MainActivity";

     public static final Uri APN_URI = Uri.parse("content://telephony/carriers");

     // public static final Uri PREFERRED_APN_URI
     // =Uri.parse("PREFERRED_APN_URI  PREFERRED_APN_URI ");
     public static final Uri CURRENT_APN_URI = Uri
             .parse("content://telephony/carriers/preferapn");

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         Log.d(TAG, "onCreate");
         checkAPN();
         // SetAPN(addAPN());
     }

     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
         getMenuInflater().inflate(R.menu.activity_main, menu);
         return true;
     }

     public void checkAPN() {
         // 检查当前连接的APN
         Cursor cr = getContentResolver().query(APN_URI, null, null, null, null);

         Log.d(TAG, "cr" + cr);
         while (cr != null && cr.moveToNext()) {

             // if(cr.getString(cr.getColumnIndex("_id")))

             // APN id
             String id = cr.getString(cr.getColumnIndex("_id"));

             Log.d(TAG, "id" + id);

 //          String apn_id= cr.getString(cr.getColumnIndex("apn_id"));
 //
 //          Log.d(TAG, "apn_id" + apn_id);
             // APN name
             String apn = cr.getString(cr.getColumnIndex("apn"));

             Log.d(TAG, apn);
             // Toast.makeText(getApplicationContext(),
             // "当前 id:" + id + " apn:" + apn, Toast.LENGTH_LONG).show();
         }

     }

     // 新增一个cmnet接入点
     public int addAPN() {
         int id = -1;

         Log.d(TAG, "添加一个新的apn");

         String NUMERIC = getSIMInfo();

         Log.d(TAG, "NUMERIC" + NUMERIC);

         if (NUMERIC == null) {

             return -1;
         }

         ContentResolver resolver = this.getContentResolver();
         ContentValues values = new ContentValues();

         SIMCardInfo siminfo = new SIMCardInfo(MainActivity.this);
         // String user = siminfo.getNativePhoneNumber().substring(start);

         values.put("name", "专用APN"); // apn中文描述
         values.put("apn", "myapn"); // apn名称
         values.put("type", "default,supl");
         values.put("numeric", NUMERIC);
         values.put("mcc", NUMERIC.substring(0, 3));
         values.put("mnc", NUMERIC.substring(3, NUMERIC.length()));
         values.put("proxy", "");
         values.put("port", "");
         values.put("mmsproxy", "");
         values.put("mmsport", "");
         values.put("user", "");
         values.put("server", "");
         values.put("password", "");
         values.put("mmsc", "");

         Cursor c = null;
         Uri newRow = resolver.insert(APN_URI, values);
         if (newRow != null) {
             c = resolver.query(newRow, null, null, null, null);
             int idIndex = c.getColumnIndex("_id");
             c.moveToFirst();
             id = c.getShort(idIndex);
         }
         if (c != null)
             c.close();
         return id;
     }

     protected String getSIMInfo() {
         TelephonyManager iPhoneManager = (TelephonyManager) this
                 .getSystemService(Context.TELEPHONY_SERVICE);
         return iPhoneManager.getSimOperator();
     }

     // 设置接入点
     public void SetAPN(int id) {
         ContentResolver resolver = this.getContentResolver();
         ContentValues values = new ContentValues();
         values.put("apn_id", id);
         resolver.update(CURRENT_APN_URI, values, null, null);

         // resolver.delete(url, where, selectionArgs)
     }

 }