代码分享第四弹，URL生成函数。其实这真的是闲的蛋疼的需求才会用到的函数，将各种形式组织的数据做成带?和&的链接，闲的蛋疼才会用这个，正常都用POST来做，具体的方法可以看我前一篇文章 Android获取网页数据的方法总结 里面有POST的用法。一会儿会放出GET的方法，往下看就是了
对于几个没太大用处的类就不多说啥了，看官随便看看：
/**
* @param params
* @return
*/
public static String urlCombiner(Map<string , String> params) {
if (params != null && !params.isEmpty()) {
StringBuilder url = new StringBuilder();
boolean first = true;
for (String key : params.keySet()) {
if (first) {
first = false;
url.append('?');
}
else {
url.append('&');
}
url.append(key + '=' + params.get(key));
}
return url.toString();
}
return "";
}
/**
* @param nameValuePairs
* @return
*/
public static String urlCombiner(ArrayList<namevaluepair> nameValuePairs) {
if (nameValuePairs != null && !nameValuePairs.isEmpty()) {
StringBuilder url = new StringBuilder();
int len = nameValuePairs.size();
for (int i = 0; i < len; i++) {
if (i == 0) {
url.append('?');
}
else {
url.append('&');
}
url.append(nameValuePairs.get(i).getName() + '=' + nameValuePairs.get(i).getValue());
}
return url.toString();
}
return "";
}
/**
* @param params
* @return
*/
public static String urlCombiner(Bundle params) {
if (params == null)
return "";
StringBuilder sb = new StringBuilder();
boolean first = true;
for (String key : params.keySet()) {
if (first) {
first = false;
sb.append("?");
}
else {
sb.append("&");
}
sb.append(key + "=" + params.getString(key));
}
return sb.toString();
}
下面是GET的函数，随便看下，用的HTTPGET，里面就用了上面三个函数中的某个，见代码。
/**
* @param nameValuePairs
* @param url
* @return
*/
public static InputStream doGet(ArrayList<namevaluepair> nameValuePairs, String url) {
HttpClient httpclient = new DefaultHttpClient();
try {
String target = url + urlCombiner(nameValuePairs);
HttpGet httpget = new HttpGet(target);
HttpResponse response = httpclient.execute(httpget);
if (response.getStatusLine().getStatusCode() == HttpURLConnection.HTTP_OK) {
return response.getEntity().getContent();
}
} catch (Exception e) {
e.printStackTrace();
}/*finally {
httpclient.getConnectionManager().shutdown();
}*/
return null;
}