1. HTTP request encapsulation tool class source code
Support GET, POST request.
import android.util.Log;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class HttpUtility {
private static final int BUFFER_SIZE = 4096;
private static final String TAG = "HttpUtility";
public static void get(final String requestUrl, final OnRequestCallBack callBack) {
new Thread() {
public void run() {
getRequest(requestUrl, callBack);
}
}.start();
}
public static void post(final String requestUrl, final String params, final OnRequestCallBack callBack) {
new Thread() {
public void run() {
postRequest(requestUrl, params, callBack);
}
}.start();
}
private static void getRequest(String requestUrl, OnRequestCallBack callBack) {
boolean isSuccess = false;
String message;
InputStream inputStream = null;
ByteArrayOutputStream baos = null;
try {
URL url = new URL(requestUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(50000);
connection.setReadTimeout(50000);
// User-Agent IE9的标识
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0;");
connection.setRequestProperty("Accept-Language", "zh-CN");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Charset", "UTF-8");
/*
* 当我们要获取我们请求的http地址访问的数据时就是使用connection.getInputStream().read()方式时我们就需要setDoInput(true)，
* 根据api文档我们可知doInput默认就是为true。我们可以不用手动设置了，如果不需要读取输入流的话那就setDoInput(false)。
* 当我们要采用非get请求给一个http网络地址传参 就是使用connection.getOutputStream().write() 方法时我们就需要setDoOutput(true), 默认是false
*/
// 设置是否从httpUrlConnection读入，默认情况下是true;
connection.setDoInput(true);
// 设置是否向httpUrlConnection输出，如果是post请求，参数要放在http正文内，因此需要设为true, 默认是false;
//connection.setDoOutput(true);//Android 4.0 GET时候 用这句会变成POST 报错java.io.FileNotFoundException
connection.setUseCaches(false);
connection.connect();//
int contentLength = connection.getContentLength();
if (connection.getResponseCode() == 200) {
inputStream = connection.getInputStream();//会隐式调用connect()
baos = new ByteArrayOutputStream();
int readLen;
byte[] bytes = new byte[1024];
while ((readLen = inputStream.read(bytes)) != -1) {
baos.write(bytes, 0, readLen);
}
String result = baos.toString();
message = "result:" + result;
isSuccess = true;
} else {
message = "get request err code :" + connection.getResponseCode();
}
Log.i(TAG,message);
} catch (MalformedURLException e) {
message = e.getMessage();
e.printStackTrace();
} catch (IOException e) {
message = e.getMessage();
e.printStackTrace();
} finally {
try {
if (baos != null) {
baos.close();
}
if (inputStream != null) {
inputStream.close();
}
} catch (IOException e) {
message = e.getMessage();
e.printStackTrace();
}
}
if (isSuccess) {
callBack.onSuccess(message);
} else {
callBack.onError(message);
}
}
private static void postRequest(String requestUrl, String params, OnRequestCallBack callBack) {
boolean isSuccess = false;
String message;
InputStream inputStream = null;
ByteArrayOutputStream baos = null;
try {
URL url = new URL(requestUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
// 设定请求的方法为"POST"
connection.setRequestMethod("POST");
connection.setConnectTimeout(50000);
connection.setReadTimeout(50000);
// User-Agent IE9的标识
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0;");
connection.setRequestProperty("Accept-Language", "zh-CN");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Charset", "UTF-8");
/*
* 当我们要获取我们请求的http地址访问的数据时就是使用connection.getInputStream().read()方式时我们就需要setDoInput(true)，
* 根据api文档我们可知doInput默认就是为true。我们可以不用手动设置了，如果不需要读取输入流的话那就setDoInput(false)。
* 当我们要采用非get请求给一个http网络地址传参 就是使用connection.getOutputStream().write() 方法时我们就需要setDoOutput(true), 默认是false
*/
// 设置是否从httpUrlConnection读入，默认情况下是true;
connection.setDoInput(true);
// 设置是否向httpUrlConnection输出，如果是post请求，参数要放在http正文内，因此需要设为true, 默认是false;
connection.setDoOutput(true);
connection.setUseCaches(false);
// set params three way OutputStreamWriter
OutputStreamWriter out = new OutputStreamWriter(
connection.getOutputStream(), "UTF-8");
// 发送请求params参数
out.write(params);
out.flush();
connection.connect();
int contentLength = connection.getContentLength();
if (connection.getResponseCode() == 200) {
// 会隐式调用connect()
inputStream = connection.getInputStream();
baos = new ByteArrayOutputStream();
int readLen;
byte[] bytes = new byte[1024];
while ((readLen = inputStream.read(bytes)) != -1) {
baos.write(bytes, 0, readLen);
}
String backStr = baos.toString();
message = backStr;
isSuccess = true;
} else {
message = "post request err code :" + connection.getResponseCode();
}
Log.i(TAG,message);
} catch (MalformedURLException e) {
message = e.getMessage();
e.printStackTrace();
} catch (IOException e) {
message = e.getMessage();
e.printStackTrace();
} finally {
try {
if (baos != null) {
baos.close();
}
if (inputStream != null) {
inputStream.close();
}
} catch (IOException e) {
message = e.getMessage();
e.printStackTrace();
}
}
if (isSuccess) {
callBack.onSuccess(message);
} else {
callBack.onError(message);
}
}
public interface OnRequestCallBack {
void onSuccess(String json);
void onError(String errorMsg);
}
}
2. Use cases
HttpUtility.get(SERVER_URL,new HttpUtility.OnRequestCallBack() {
@Override
public void onSuccess(String json) {
Log.d(TAG,json);
}
@Override
public void onError(String errorMsg) {
Log.e(TAG,errorMsg);
}
});