转自 https://www.cnblogs.com/you411305469/p/5212479.html
里面介绍了实用的两种
要特别注意，向php请求数据是表单类型的数据
application/x-www-form-urlencoded
import android.os.AsyncTask;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Map;
/**
* @author Admin
* @version $Rev$
* @des ${TODO}
* @updateAuthor $Author$
* @updateDes ${TODO}
*/
public class HttpConnection {
/**
* 升级版接口
*
* @param url
* @param method
* @param successCallback
* @param failCallback
* @param map
*/
public HttpConnection(final String url, final HttpMethod method,
final SuccessCallback successCallback,
final FailCallback failCallback, final Map<String, String> map) {
new AsyncTask<Void, Void, String>() {
@Override
protected String doInBackground(Void... params) {
StringBuffer sb = new StringBuffer();
String realString = "";
for (Map.Entry<String, String> entry : map.entrySet()) {
sb.append(entry.getKey()).append("=")
.append(entry.getValue()).append("&");
}
realString = sb.toString().substring(0,
sb.toString().length() - 1);
try {
URLConnection uc;
switch (method) {
case POST:
uc = new URL(url).openConnection();
uc.setDoOutput(true);
uc.setConnectTimeout(5000);
BufferedWriter bw = new BufferedWriter(
new OutputStreamWriter(uc.getOutputStream(),
"utf-8"));
bw.write(realString);
bw.flush();
break;
default:
uc = new URL(url + "?" + realString).openConnection();
uc.setConnectTimeout(5000);
uc.setRequestProperty("apikey",
"2f50fafc573e93a725e277b073d9c5dd");
break;
}
System.out.println("Request url:" + uc.getURL());
System.out.println("Request date:" + realString);
System.out.println("Result status:"
+ ((HttpURLConnection) uc).getResponseCode());
if (((HttpURLConnection) uc).getResponseCode() == 200) {
BufferedReader br = new BufferedReader(
new InputStreamReader(uc.getInputStream(),
"utf-8"));
StringBuffer result = new StringBuffer();
String line = "";
while ((line = br.readLine()) != null) {
result.append(line);
}
System.out.println("Result:" + result);
return result.toString();
} else {
System.out.println("Result:"
+ ((HttpURLConnection) uc).getResponseCode());
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
if (result != null) {
try {
JSONObject json = new JSONObject(result);
if (successCallback != null) {
successCallback.onSuccess(result);
}
} catch (Exception e) {
e.printStackTrace();
}
} else {
if (failCallback != null) {
failCallback.onFail();
}
}
super.onPostExecute(result);
}
}.execute();
}
/**
* json型接口升级版
*
* @param url
* @param successCallback
* @param failCallback
* @param json map
*/
public HttpConnection(final String url,
final SuccessCallback successCallback,
final FailCallback failCallback, final String json) {
new AsyncTask<Void, Void, String>() {
@Override
protected String doInBackground(Void... params) {
try {
HttpURLConnection uc = (HttpURLConnection) new URL(url)
.openConnection();
//打开输出流
uc.setDoOutput(true);
//打开输入流
uc.setDoInput(true);
uc.setInstanceFollowRedirects(true);
//post方式
uc.setRequestMethod("POST");
//超时
uc.setConnectTimeout(5000);
//禁止使用缓存
uc.setUseCaches(false);
//接收字符串类型数据用json
uc.setRequestProperty("Accept", "application/json");
//请求的内容为表单类型数据
uc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
//设置utf8
uc.setRequestProperty("Charset", "UTF-8");
// BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(uc.getOutputStream(),"utf-8"));
// bw.write(json);
// bw.flush();
/**
* 请求数据（表单类型的或json类型的数据）
*/
OutputStreamWriter writer = new OutputStreamWriter(uc.getOutputStream());
//发送参数
writer.write(json);
//清理当前编辑器的左右缓冲区，并使缓冲区数据写入基础流
writer.flush();
System.out.println("Request url:" + uc.getURL());
System.out.println("Request date:" + json);
//判断接收数据，为json格式
if (uc.getResponseCode() == 200) {
BufferedReader br = new BufferedReader(
new InputStreamReader(uc.getInputStream(),
"utf-8"));
StringBuffer result = new StringBuffer();
String line = "";
while ((line = br.readLine()) != null) {
result.append(line);
}
System.out.println("Result:" + result);
return result.toString();
} else {
System.out.println("uc.getResponseCode()=="
+ uc.getResponseCode());
System.out.println("uc.getResponseMessage()=="
+ uc.getResponseMessage());
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
if (result != null) {
if (successCallback != null) {
successCallback.onSuccess(result);
}
} else {
if (failCallback != null) {
failCallback.onFail();
}
}
super.onPostExecute(result);
}
}.execute();
}
public static interface SuccessCallback {
void onSuccess(String result);
}
public static interface FailCallback {
void onFail();
}
}
以上类需要用到HttpMethod
public enum HttpMethod {
POST,GET
}
以上的类就是http访问接口的类，以下就来举些例子吧：
/**
* 积分商品列表
*/
private void initData(int flag) {
private String url = "http://192.168.1.11/xxx";
Map<String, String> params = new HashMap<String, String>();
params.put("types", "0");
params.put("isonsail", "0");
params.put("rowStart", "0");
params.put("rowEnd", "20");
new NetConnection(url, "post",
new NetConnection.SuccessCallback() {
@Override
public void onSuccess(String result) {
}
}, new NetConnection.FailCallback() {
@Override
public void onFail() {
}
}, params);
}
还有一种是json型的入参的：
/**
* 发起全车诊断 接口描述：该接口用于向 iOBD设备下发诊断指令
*/
public void check() {
JSONObject param = new JSONObject();
try {
param.put("appkey", Config.getAppKey(this));
param.put("imei", Config.getImei(this));
} catch (Exception e) {
e.printStackTrace();
}
new NetConnection(Config.SERVER_URL + "diagnosis/trigge",
new NetConnection.SuccessCallback() {
@Override
public void onSuccess(String result) {
}
}, new NetConnection.FailCallback() {
@Override
public void onFail() {
}
}, param.toString());
}