网络传输，edittext被输入法盖过等一些小问题的解决方法

package com.example.dinnermanager;


import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;


import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;


import android.util.Log;


public class HttpUtils {


public static String requestServer(String requestUri,
Map<String, String> paramsMap) {
if (requestUri == null) {
return null;
}


String responseMsg = null;
// 使用apache HTTP客户端实现


HttpUriRequest request;


request = new HttpPost(requestUri);
// 如果传递参数多的话，可以丢传递的参数进行封装
List<NameValuePair> params = new ArrayList<NameValuePair>();
if (paramsMap != null && !paramsMap.isEmpty()) {
Iterator<String> it = paramsMap.keySet().iterator();
while (it.hasNext()) {
String key = (String) it.next();
String value = paramsMap.get(key);
params.add(new BasicNameValuePair(key, value));
}
}
// 设置请求参数项
try {
((HttpPost) request).setEntity(new UrlEncodedFormEntity(params,
HTTP.UTF_8));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}


try {


HttpClient client = new DefaultHttpClient();
// 设置请求超时
client.getParams().setParameter(
CoreConnectionPNames.CONNECTION_TIMEOUT, 15 * 1000);
client.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,
15 * 1000);
// 执行请求返回相应
HttpResponse response = client.execute(request);


// 判断是否请求成功
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
// 获得响应信息
responseMsg = EntityUtils.toString(response.getEntity());
} else {
responseMsg = "false";
Log.d("jia", "status code:"
+ response.getStatusLine().getStatusCode());
}
} catch (Exception e) {
e.printStackTrace();
}
Log.d("jia", "responseMsg:" + responseMsg);
return responseMsg;
}

}

上面是一个使用http post方法的方法

每次使用调用 传入参数pth string 和 params

edittext输入框被输入法挡住问题 解决方法 在edittext的外层布局外加一层scrollview

点击listview 对点击的那一栏样式改变，在adapter里写一个变量checked id ，通过onItemclick 方法的position对checked id赋值 ，然后在adapter的getview方法中if position = checked id  那么setbackground 等等操作，但是因为用到viewholder缓存机制，需要同时if position！=checked id 要对其他item进行恢复处理。

字符串之间值的比较使用.equals

对有些异常抛出需要进行处理，否则程序会达不到你想要的结果