原创：Android APN 设置之 cmnet 改 cmwap（一）

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package com.android.set.net.apn;

import java.util.ArrayList;
import java.util.HashMap;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.net.Uri;
import android.util.Log;

public class ChangeCurrentAPN {

public static final Uri APN_TABLE_URI = Uri.parse("content://telephony/carriers");//所有的APN配配置信息位置

public static final Uri PREFERRED_APN_URI = Uri.parse("content://telephony/carriers/preferapn");//当前的APN配置信息位置

public static final String TAG = "ouyangpin";

// int apnId;

Cursor cursor_current;
Cursor cursor_need;
Context context;

public HttpReqConnect http;
int newCreateAPNSet_Id;
public ChangeCurrentAPN(Context context, HttpReqConnect http) {
this.context = context;
this.http = http;
boolean isCmwap = getDefaultAPN();
if (!isCmwap) {//当前的接入点不是cmwap接入点
if (!checkWapAPN()) {//检查当前所有接入点中是否存在cmwap接入点，如果不存在任何cmwap接入点，则创建一个新的
// 创建一个新的cmwap接入点并返回该新创建的接入点的id值
newCreateAPNSet_Id = addCmwapAPN();
Log.d("chenjianli", "info: newCreateAPNSet_Id is " + newCreateAPNSet_Id);
boolean fResult = SetDefaultAPN(newCreateAPNSet_Id);//设置该新创建的接入点为当前接入点
Log.d("chenjianli", "info: fResult = " + fResult);//立刻查询fResult的值为false还是true来判断当前接入点是否改变是没有意义的，因为手机改变当前接入点需要一段时间
Log.d("chenjianli", "info: current apn set is cmnet,and not have cmwap APN,we create new cmwap APN and then set it to mobile.");
} else {
//从所有满足条件的接入点中选择合适的接入点并设置
for(int i = 0;i != cmwapArrayList.size();i++) {
String type = cmwapArrayList.get(i).get("type");
String proxy = cmwapArrayList.get(i).get("proxy");
String port = cmwapArrayList.get(i).get("port");
if ( !type.equals("mms")
&&(proxy.equals("10.0.0.172")||proxy.equals("010.000.000.172"))
&&port.equals("80"))
{
String id = cmwapArrayList.get(i).get("_id");
SetDefaultAPN(Integer.parseInt(id));
Log.d("chenjianli", "info: current apn set is cmwap,and have cmwap set that we need,do not need to create new cmwap APN,just changed .");
return;
}
}
}
try {
Thread.sleep(10000);//因为系统更改APN设置需要一定的时间，但是目前我还不清楚当系统的APN被改变之后系统给出什么提示（到底是发广播还是什么，目前只知道会在通知栏通知一下），所以我这里暂时的让它睡眠10秒，让系统有足够的时间去更改APN，之后我们再去进行联网的操作。
} catch (InterruptedException e) {
e.printStackTrace();
}
} else {//当前的接入点已经是cmwap接入点
//什么都不做!
Log.d("chenjianli", "info: current apn set is cmnet,do not need to change .");
}

}

String mobileInitalAPNSet_Id;
// 获取当前apn属性
private boolean getDefaultAPN() {
cursor_current = context.getContentResolver().query(PREFERRED_APN_URI,null, null, null, null);
if (cursor_current.moveToFirst()) {
String proxy = cursor_current.getString(cursor_current.getColumnIndex("proxy"));
String apn = cursor_current.getString(cursor_current.getColumnIndex("apn"));
String port = cursor_current.getString(cursor_current.getColumnIndex("port"));
String current = cursor_current.getString(cursor_current.getColumnIndex("current"));
if (proxy.equals("10.0.0.172")|| proxy.equals("010.000.000.172")&&port.equals("80")&&apn.equals("cmwap")&&current.equals("1")) {
mobileInitalAPNSet_Id = cursor_current.getString(cursor_current.getColumnIndex("_id"));
return true;
}
}
return false;
}

public boolean SetDefaultAPN(int id) {
boolean res = false;
ContentResolver resolver = context.getContentResolver();
ContentValues values = new ContentValues();
values.put("apn_id", id);
try {
resolver.update(PREFERRED_APN_URI, values, null, null);
Cursor c = resolver.query(PREFERRED_APN_URI, new String[] { "name","apn" }, "_id=" + id, null, null);
if (c != null) {
res = true;
c.close();
}
} catch (SQLException e) {
Log.d(TAG, "-----" + e.getMessage());
}
return res;
}

private ArrayList<HashMap<String, String>> cmwapArrayList = new ArrayList<HashMap<String, String>>();
// 检测是否存在cmwap接入点
private boolean checkWapAPN() {
Cursor cursor_need = context.getContentResolver().query(APN_TABLE_URI,null, "apn = \'cmwap\' and current = 1", null, null);
if (cursor_need != null) {
while(cursor_need.moveToNext()){
HashMap<String, String> map = new HashMap<String, String>();
map.put("type", cursor_need.getString(cursor_need.getColumnIndex("type")));
map.put("_id", cursor_need.getString(cursor_need.getColumnIndex("_id")));
map.put("proxy", cursor_need.getString(cursor_need.getColumnIndex("proxy")));
map.put("port", cursor_need.getString(cursor_need.getColumnIndex("port")));
cmwapArrayList.add(map);
}
return true;//表示存在cmwap接入点
} else {
return false;//表示不存在cmwap接入点
}
}

private int addCmwapAPN() {
ContentResolver cr = context.getContentResolver();
ContentValues cv = new ContentValues();
cv.put("name", "mycmwap");
cv.put("apn", "cmwap");
cv.put("numeric", "46000");
cv.put("mcc", "460");
cv.put("mnc", "00");
cv.put("proxy", "10.0.0.172");
cv.put("port", "80");
cv.put("mmsc", "http://moternet.com.cn/");
cv.put("current", 1);

Cursor c = null;
try {
Uri newRow = cr.insert(APN_TABLE_URI, cv);
if (newRow != null) {
c = cr.query(newRow, null, null, null, null);
c.moveToFirst();
String id = c.getString(c.getColumnIndex("_id"));
return Integer.parseInt(id);//返回新创建的cmwap接入点的id
}
} catch (SQLException e) {
Log.d(TAG, e.getMessage());
}

if (c != null)
c.close();
return 0;
}

}

这里在放一个查看当前手机接入点的所有信息，大家可以做个打印：

String[] names = cursor_current.getColumnNames();
if (names != null) {
sb.append("当前接入点配置信息：");
for (int i = 0; i < names.length; ++i) {
String value = cursor_current.getString(cursor_current.getColumnIndex(names[i]));
sb.append(names[i]+" = "+value+"\n");
}
}

另外很重要的一点就是要配置好权限：

<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.INTERNET"></uses-permission>

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