Android Http请求方法汇总

public String executeHttpPost() {

String result = null;

URL url = null;

HttpURLConnection connection = null;

InputStreamReader in = null;

try {

url = new URL(“http://10.0.2.2:8888/data/post/”);

connection = (HttpURLConnection) url.openConnection();

connection.setDoInput(true);

connection.setDoOutput(true);

connection.setRequestMethod(“POST”);

connection.setRequestProperty(“Content-Type”, “application/x-www-form-urlencoded”);

connection.setRequestProperty(“Charset”, “utf-8”);

DataOutputStream dop = new DataOutputStream(

connection.getOutputStream());

dop.writeBytes(“token=alexzhou”);

dop.flush();

dop.close();

in = new InputStreamReader(connection.getInputStream());

BufferedReader bufferedReader = new BufferedReader(in);

StringBuffer strBuffer = new StringBuffer();

String line = null;

while ((line = bufferedReader.readLine()) != null) {

strBuffer.append(line);

}

result = strBuffer.toString();

} catch (Exception e) {

e.printStackTrace();

} finally {

if (connection != null) {

connection.disconnect();

}

if (in != null) {

try {

in.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

return result;

}

如果参数中有中文的话，可以使用下面的方式进行编码解码：

1	URLEncoder.encode("测试","utf-8")

2	URLDecoder.decode("测试","utf-8");

2.使用Apache的HttpClient访问网络资源

(1)get请求

public String executeGet() {

String result = null;

BufferedReader reader = null;

try {

HttpClient client = new DefaultHttpClient();

HttpGet request = new HttpGet();

request.setURI(new URI(

“http://10.0.2.2:8888/data/get/?token=alexzhou”));

HttpResponse response = client.execute(request);

reader = new BufferedReader(new InputStreamReader(response

.getEntity().getContent()));

StringBuffer strBuffer = new StringBuffer(“”);

String line = null;

while ((line = reader.readLine()) != null) {

strBuffer.append(line);

}

result = strBuffer.toString();

} catch (Exception e) {

e.printStackTrace();

} finally {

if (reader != null) {

try {

reader.close();

reader = null;

} catch (IOException e) {

e.printStackTrace();

}

}

}

return result;

}

（2）post请求

public String executePost() {

String result = null;

BufferedReader reader = null;

try {

HttpClient client = new DefaultHttpClient();

HttpPost request = new HttpPost();

request.setURI(new URI(“http://10.0.2.2:8888/data/post/”));

List postParameters = new ArrayList();

postParameters.add(new BasicNameValuePair(“token”, “alexzhou”));

UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(

postParameters);

request.setEntity(formEntity);

HttpResponse response = client.execute(request);

reader = new BufferedReader(new InputStreamReader(response

.getEntity().getContent()));

StringBuffer strBuffer = new StringBuffer(“”);

String line = null;

while ((line = reader.readLine()) != null) {

strBuffer.append(line);

}

result = strBuffer.toString();

} catch (Exception e) {

e.printStackTrace();

} finally {

if (reader != null) {

try {

reader.close();

reader = null;

} catch (IOException e) {

e.printStackTrace();

}

}

}

return result;

}

3.服务端代码实现

上面是采用两种方式的get和post请求的代码，下面来实现服务端的代码编写，使用python+flask真的非常的简单，就一个文件，前提是你得搭建好python+flask的环境，代码如下：

#coding=utf-8

import json

from flask import Flask,request,render_template

app = Flask(name)

def send_ok_json(data=None):

if not data:

data = {}

ok_json = {‘ok’:True,‘reason’:‘’,‘data’:data}

return json.dumps(ok_json)

@app.route(‘/data/get/’,methods=[‘GET’])

def data_get():

token = request.args.get(‘token’)

ret = ‘%s**%s’ %(token,‘get’)

return send_ok_json(ret)

@app.route(‘/data/post/’,methods=[‘POST’])

def data_post():

token = request.form.get(‘token’)

ret = ‘%s**%s’ %(token,‘post’)

return send_ok_json(ret)

if name == “main”:

app.run(host=“localhost”,port=8888,debug=True)

运行服务器，如图：

4. 编写单元测试代码

右击项目：new–》Source Folder取名tests，包名是：com.alexzhou.androidhttp.test（随便取，没有要求），结构如图：

在该包下创建测试类HttpTest，继承自AndroidTestCase。编写这四种方式的测试方法，代码如下:

public class HttpTest extends AndroidTestCase {

@Override

protected void setUp() throws Exception {

Log.e(“HttpTest”, “setUp”);

}

@Override

protected void tearDown() throws Exception {

Log.e(“HttpTest”, “tearDown”);

}

public void testExecuteGet() {

Log.e(“HttpTest”, “testExecuteGet”);

HttpClientTest client = HttpClientTest.getInstance();

String result = client.executeGet();

Log.e(“HttpTest”, result);

}

public void testExecutePost() {

Log.e(“HttpTest”, “testExecutePost”);

HttpClientTest client = HttpClientTest.getInstance();

String result = client.executePost();

Log.e(“HttpTest”, result);

}

public void testExecuteHttpGet() {

Log.e(“HttpTest”, “testExecuteHttpGet”);

HttpClientTest client = HttpClientTest.getInstance();

String result = client.executeHttpGet();

Log.e(“HttpTest”, result);

}

public void testExecuteHttpPost() {

Log.e(“HttpTest”, “testExecuteHttpPost”);

HttpClientTest client = HttpClientTest.getInstance();

String result = client.executeHttpPost();

Log.e(“HttpTest”, result);

}

}

附上HttpClientTest.java的其他代码：

public class HttpClientTest {

private static final Object mSyncObject = new Object();

private static HttpClientTest mInstance;

private HttpClientTest() {

}

public static HttpClientTest getInstance() {

synchronized (mSyncObject) {

if (mInstance != null) {

return mInstance;

}

mInstance = new HttpClientTest();

}

return mInstance;

}

/**…上面的四个方法…*/

}

现在还需要修改Android项目的配置文件AndroidManifest.xml，添加网络访问权限和单元测试的配置，AndroidManifest.xml配置文件的全部代码如下：

<manifest xmlns:android=“http://schemas.android.com/apk/res/android”

package=“com.alexzhou.androidhttp”

android:versionCode=“1”

android:versionName=“1.0” >

<uses-sdk

android:minSdkVersion=“8”

android:targetSdkVersion=“15” />

<application

android:icon=“@drawable/ic_launcher”

android:label=“@string/app_name”

android:theme=“@style/AppTheme” >

<activity

android:name=“.MainActivity”

android:label=“@string/title_activity_main” >

<instrumentation

android:name=“android.test.InstrumentationTestRunner”

android:targetPackage=“com.alexzhou.androidhttp” />

id:icon=“@drawable/ic_launcher”

android:label=“@string/app_name”

android:theme=“@style/AppTheme” >

<activity

android:name=“.MainActivity”

android:label=“@string/title_activity_main” >

<instrumentation

android:name=“android.test.InstrumentationTestRunner”

android:targetPackage=“com.alexzhou.androidhttp” />