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在有中国特色的 GPRS 接入方式背景下,时至今日,我们仍然不得不考虑 cmwap 用户上网的问题;虽然我们暂时找不到关于统计cmwap用户的确切使用比例,但是可以确定的是一些做的比较好的 Android 手机应用绝对不会出现换了 cmwap 就无法网络通信的问题,要解决这个问题其实很简单,考虑两个步骤:1、检测用户手机的设置是否打开了 cmwap。2、使用 Android HttpClient 的代理模式上 cmwap。具体的实现代码如下,希望对有需要的朋友有所帮助。 1、以下是检测手机上网类型的工具类:import android.content.Context;import android.database.Cursor;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.net.Uri;public class HttpUtil { static public int WAP_INT = 1; static public int NET_INT = 2; static public int WIFI_INT = 3; static public int NONET_INT = 4; static private Uri APN_URI = null; static public int getNetType (Context ctx) { // has network ConnectivityManager conn = (ConnectivityManager) ctx.getSystemService(Context.CONNECTIVITY_SERVICE); if (conn == null) { return HttpUtil.NONET_INT; } NetworkInfo info = conn.getActiveNetworkInfo(); if (info == null){ return HttpUtil.NONET_INT; } // check use wifi String type = info.getTypeName(); if (type.equals("WIFI")) { return HttpUtil.WIFI_INT; } // check use wap APN_URI = Uri.parse("content://telephony/carriers/preferapn"); Cursor uriCursor = ctx.getContentResolver().query(APN_URI, null, null, null, null); if (uriCursor != null && uriCursor.moveToFirst()) { String proxy = uriCursor.getString(uriCursor.getColumnIndex("proxy")); String port = uriCursor.getString(uriCursor.getColumnIndex("port")); String apn = uriCursor.getString(uriCursor.getColumnIndex("apn")); if (proxy != null && port != null && apn != null && apn.equals("cmwap") && port.equals("80") && (proxy.equals("10.0.0.172") || proxy.equals("010.000.000.172"))) { return HttpUtil.WAP_INT; } } return HttpUtil.NET_INT; } }2、以下是我自己封装 HttpClient 的 AppClient 类的部分代码:
... ...public class AppClient { private String apiUrl; private HttpParams httpParams; private HttpClient httpClient; ... ... public AppClient (String url) { initClient(url); } ... ... private void initClient (String url) { // initialize API URL this.apiUrl = url; // set client timeout httpParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpParams, timeoutConnection); HttpConnectionParams.setSoTimeout(httpParams, timeoutSocket); // init client httpClient = new DefaultHttpClient(httpParams); } public void useWap () { HttpHost proxy = new HttpHost("10.0.0.172", 80, "http"); httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy); } public String get () throws Exception { try { HttpGet httpGet = headerFilter(new HttpGet(this.apiUrl)); HttpResponse httpResponse = httpClient.execute(httpGet); if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { String httpResult = resultFilter(httpResponse.getEntity()); return httpResult; } else { return null; } } catch (ConnectTimeoutException e) { throw new Exception(C.err.network); } catch (Exception e) { e.printStackTrace(); } return null; } ... ...}使用的时候,先用 HttpUtil.getNetType() 获取用户上网方式,如果是 HttpUtil.WAP_INT 的话,则在使用 AppClient 的时候多调用一个 useWap() 方法。示例代码如下:
... ...AppClient ac = new AppClient(url);if (HttpUtil.WAP_INT == HttpUtil.getNetType(this)) { ac.useWap();}... ...
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