android手机客户端在上传文件时,有时候会一直失败,其可能的原因是APN的设置。wap下的成功率极低,所以在进行文件上传时最好设置下 apn为net形式。下面是我在网上找的一些代码,是由wap转net的,当然net转wap稍微修改下就可以。经测试是可用的,分享一下:
PS:apn的切换过程需要时间,不是立即生效。
- package com.android.couples;
- import java.util.ArrayList;
- import android.content.ContentResolver;
- import android.content.ContentValues;
- import android.content.Context;
- import android.database.Cursor;
- import android.net.Uri;
- import android.text.TextUtils;
- import android.util.Log;
- public class APNManager {
- private static String TAG = "APNManager";
- private static final Uri APN_TABLE_URI = Uri
- .parse("content://telephony/carriers");// 所有的APN配配置信息位置
- private static final Uri PREFERRED_APN_URI = Uri
- .parse("content://telephony/carriers/preferapn");// 当前的APN
- private static String[] projection = { "_id", "apn", "type", "current",
- "proxy", "port" };
- private static String APN_NET_ID = null;
- //切换成NETAPN
- public static boolean ChangeNetApn(final Context context) {
- final String wapId = getWapApnId(context);
- String apnId = getCurApnId(context);
- // 若当前apn是wap,则切换至net
- if (wapId.equals(apnId)) {
- APN_NET_ID = getNetApnId(context);
- setApn(context, APN_NET_ID);
- // 切换apn需要一定时间,先让等待几秒,与机子性能有关
- try {
- Thread.sleep(3000);
- } catch (InterruptedException e) {
- e.printStackTrace();
- }
- Log.d("xml", "setApn");
- return true;
- }
- return true;
- }
- //获取当前APN
- public static String getCurApnId(Context context) {
- ContentResolver resoler = context.getContentResolver();
- // String[] projection = new String[] { "_id" };
- Cursor cur = resoler.query(PREFERRED_APN_URI, projection, null, null,
- null);
- String apnId = null;
- if (cur != null && cur.moveToFirst()) {
- apnId = cur.getString(cur.getColumnIndex("_id"));
- }
- Log.i("xml","getCurApnId:"+apnId);
- return apnId;
- }
- public static APN getCurApnInfo(final Context context) {
- ContentResolver resoler = context.getContentResolver();
- // String[] projection = new String[] { "_id" };
- Cursor cur = resoler.query(PREFERRED_APN_URI, projection, null, null,
- null);
- APN apn = new APN();
- if (cur != null && cur.moveToFirst()) {
- apn.id = cur.getString(cur.getColumnIndex("_id"));
- apn.apn = cur.getString(cur.getColumnIndex("apn"));
- apn.type = cur.getString(cur.getColumnIndex("type"));
- }
- return apn;
- }
- public static void setApn(Context context, String id) {
- ContentResolver resolver = context.getContentResolver();
- ContentValues values = new ContentValues();
- values.put("apn_id", id);
- resolver.update(PREFERRED_APN_URI, values, null, null);
- Log.d("xml", "setApn");
- }
- //获取WAP APN
- public static String getWapApnId(Context context) {
- ContentResolver contentResolver = context.getContentResolver();
- // 查询cmwapAPN
- Cursor cur = contentResolver.query(APN_TABLE_URI, projection,
- "apn = \'cmwap\' and current = 1", null, null);
- // wap APN 端口不为空
- if (cur != null && cur.moveToFirst()) {
- do {
- String id = cur.getString(cur.getColumnIndex("_id"));
- String proxy = cur.getString(cur.getColumnIndex("proxy"));
- if (!TextUtils.isEmpty(proxy)) {
- Log.i("xml","getWapApnId"+id);
- return id;
- }
- } while (cur.moveToNext());
- }
- return null;
- }
- public static String getNetApnId(Context context) {
- ContentResolver contentResolver = context.getContentResolver();
- Cursor cur = contentResolver.query(APN_TABLE_URI, projection,
- "apn = \'cmnet\' and current = 1", null, null);
- if (cur != null && cur.moveToFirst()) {
- return cur.getString(cur.getColumnIndex("_id"));
- }
- return null;
- }
- //获取所有APN
- public static ArrayList<APN> getAPNList(final Context context) {
- ContentResolver contentResolver = context.getContentResolver();
- Cursor cr = contentResolver.query(APN_TABLE_URI, projection, null,
- null, null);
- ArrayList<APN> apnList = new ArrayList<APN>();
- if (cr != null && cr.moveToFirst()) {
- do{
- Log.d(TAG,
- cr.getString(cr.getColumnIndex("_id")) + ";"
- + cr.getString(cr.getColumnIndex("apn")) + ";"
- + cr.getString(cr.getColumnIndex("type")) + ";"
- + cr.getString(cr.getColumnIndex("current"))+ ";"
- + cr.getString(cr.getColumnIndex("proxy")));
- APN apn = new APN();
- apn.id = cr.getString(cr.getColumnIndex("_id"));
- apn.apn = cr.getString(cr.getColumnIndex("apn"));
- apn.type = cr.getString(cr.getColumnIndex("type"));
- apnList.add(apn);
- }while(cr.moveToNext());
- cr.close();
- }
- return apnList;
- }
- //获取可用的APN
- public static ArrayList<APN> getAvailableAPNList(final Context context) {
- // current不为空表示可以使用的APN
- ContentResolver contentResolver = context.getContentResolver();
- Cursor cr = contentResolver.query(APN_TABLE_URI, projection,
- "current is not null" , null, null);
- ArrayList<APN> apnList = new ArrayList<APN>();
- if (cr != null && cr.moveToFirst()) {
- do{
- Log.d(TAG,
- cr.getString(cr.getColumnIndex("_id")) + ";"
- + cr.getString(cr.getColumnIndex("apn")) + ";"
- + cr.getString(cr.getColumnIndex("type")) + ";"
- + cr.getString(cr.getColumnIndex("current"))+ ";"
- + cr.getString(cr.getColumnIndex("proxy")));
- APN apn = new APN();
- apn.id = cr.getString(cr.getColumnIndex("_id"));
- apn.apn = cr.getString(cr.getColumnIndex("apn"));
- apn.type = cr.getString(cr.getColumnIndex("type"));
- apnList.add(apn);
- }while (cr.moveToNext());
- cr.close();
- }
- return apnList;
- }
- //自定义APN包装类
- static class APN {
- String id;
- String apn;
- String type;
- public String toString() {
- return "id=" + id + ",apn=" + apn + ";type=" + type;
- }
- }
- }