3、通信工具编写HttpClient

一、是否设置代理的工具类

public class NetUtil {
/**
* 检查用户的网络:是否有网络
*/
public static boolean checkNet(Context context) {
// 判断：WIFI链接
boolean isWIFI = isWIFIConnection(context);
// 判断：Mobile链接
boolean isMOBILE = isMOBILEConnection(context);


// 如果Mobile在链接，判断是哪个APN被选中了
if (isMOBILE) {
// APN被选中,的代理信息是否有内容，如果有wap方式
readAPN(context);// 判断是哪个APN被选中了
}


if (!isWIFI && !isMOBILE) {
return false;
}


return true;
}


/**
* APN被选中,的代理信息是否有内容，如果有wap方式
* 
* @param context
*/
private static void readAPN(Context context) {
Uri PREFERRED_APN_URI = Uri.parse("content://telephony/carriers/preferapn");//4.0模拟器屏蔽掉该权限


// 操作联系人类似
ContentResolver resolver = context.getContentResolver();
// 判断是哪个APN被选中了
Cursor cursor = resolver.query(PREFERRED_APN_URI, null, null, null, null);

if(cursor!=null&&cursor.moveToFirst())
{
GlobalParams.PROXY=cursor.getString(cursor.getColumnIndex("proxy"));
GlobalParams.PORT=cursor.getInt(cursor.getColumnIndex("port"));
}



}


/**
* 判断：Mobile链接
* 
* @param context
* @return
*/
private static boolean isMOBILEConnection(Context context) {
ConnectivityManager manager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);


NetworkInfo networkInfo = manager
.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if (networkInfo != null) {
return networkInfo.isConnected();
}
return false;
}


/**
* 判断：WIFI链接
* 
* @param context
* @return
*/
private static boolean isWIFIConnection(Context context) {
ConnectivityManager manager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);


NetworkInfo networkInfo = manager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (networkInfo != null) {
return networkInfo.isConnected();
}
return false;
}
}

二、连接网络的工具类

public class HttpClientUtil {
private HttpClient client;


private HttpPost post;
private HttpGet get;


public HttpClientUtil() {
client = new DefaultHttpClient();
// 判断是否需要设置代理信息
if (StringUtils.isNotBlank(GlobalParams.PROXY)) {
// 设置代理信息
HttpHost host = new HttpHost(GlobalParams.PROXY, GlobalParams.PORT);
client.getParams()
.setParameter(ConnRoutePNames.DEFAULT_PROXY, host);
}
}


/**
* 向指定的链接发送xml文件
* 
* @param uri
* @param xml
*/
public InputStream sendXml(String uri, String xml) {
post = new HttpPost(uri);


try {
StringEntity entity = new StringEntity(xml, ConstantValue.ENCONDING);
post.setEntity(entity);


HttpResponse response = client.execute(post);


// 200
if (response.getStatusLine().getStatusCode() == 200) {
return response.getEntity().getContent();
}


} catch (Exception e) {
e.printStackTrace();
}


return null;


}


}