Android Http请求方法汇总

推荐整理分享Android Http请求方法汇总，希望有所帮助，仅作参考，欢迎阅读内容。

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这篇文章主要实现了在Android中使用JDK的HttpURLConnection和Apache的HttpClient访问网络资源，服务端采用python&#;flask编写，使用Servlet太麻烦了。关于Http协议的相关知识，可以在网上查看相关资料。代码比较简单，就不详细解释了。

1. 使用JDK中HttpURLConnection访问网络资源

(1)get请求

?publicString executeHttpGet() { String result = null; URL url = null; HttpURLConnection connection = null; InputStreamReader in = null; try{ url = newURL(" connection = (HttpURLConnection) url.openConnection(); in = newInputStreamReader(connection.getInputStream()); BufferedReader bufferedReader = newBufferedReader(in); StringBuffer strBuffer = newStringBuffer(); 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(); } } } returnresult; }

注意：因为是通过android模拟器访问本地pc服务端，所以不能使用localhost和.0.0.1，使用.0.0.1会访问模拟器自身。Android系统为实现通信将PC的IP设置为.0.2.2

(2)post请求

?publicString executeHttpPost() { String result = null; URL url = null; HttpURLConnection connection = null; InputStreamReader in = null; try{ url = newURL(" 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 = newDataOutputStream( connection.getOutputStream()); dop.writeBytes("token=alexzhou"); dop.flush(); dop.close(); in = newInputStreamReader(connection.getInputStream()); BufferedReader bufferedReader = newBufferedReader(in); StringBuffer strBuffer = newStringBuffer(); 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(); } } } returnresult; }

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：

?URLEncoder.encode("测试","utf-8")URLDecoder.decode("测试","utf-8");

2.使用Apache的HttpClient访问网络资源(1)get请求

?publicString executeGet() { String result = null; BufferedReader reader = null; try{ HttpClient client = newDefaultHttpClient(); HttpGet request = newHttpGet(); request.setURI(newURI( " HttpResponse response = client.execute(request); reader = newBufferedReader(newInputStreamReader(response .getEntity().getContent())); StringBuffer strBuffer = newStringBuffer(""); 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(); } } } returnresult; }

（2）post请求

?publicString executePost() { String result = null; BufferedReader reader = null; try{ HttpClient client = newDefaultHttpClient(); HttpPost request = newHttpPost(); request.setURI(newURI(" List<NameValuePair> postParameters = newArrayList<NameValuePair>(); postParameters.add(newBasicNameValuePair("token", "alexzhou")); UrlEncodedFormEntity formEntity = newUrlEncodedFormEntity( postParameters); request.setEntity(formEntity); HttpResponse response = client.execute(request); reader = newBufferedReader(newInputStreamReader(response .getEntity().getContent())); StringBuffer strBuffer = newStringBuffer(""); 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(); } } } returnresult; }

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 importjsonfromflask importFlask,request,render_template app =Flask(__name__) defsend_ok_json(data=None): ifnot data: data ={} ok_json ={'ok':True,'reason':'','data':data} returnjson.dumps(ok_json) @app.route('/data/get/',methods=['GET'])defdata_get(): token =request.args.get('token') ret ='%s**%s' %(token,'get') returnsend_ok_json(ret) @app.route('/data/post/',methods=['POST'])defdata_post(): token =request.form.get('token') ret ='%s**%s' %(token,'post') returnsend_ok_json(ret) if__name__ =="__main__": app.run(host="localhost",port=,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:

?publicclass HttpTest extendsAndroidTestCase { @Override protectedvoid setUp() throwsException { Log.e("HttpTest", "setUp"); } @Override protectedvoid tearDown() throwsException { Log.e("HttpTest", "tearDown"); } publicvoid testExecuteGet() { Log.e("HttpTest", "testExecuteGet"); HttpClientTest client = HttpClientTest.getInstance(); String result = client.executeGet(); Log.e("HttpTest", result); } publicvoid testExecutePost() { Log.e("HttpTest", "testExecutePost"); HttpClientTest client = HttpClientTest.getInstance(); String result = client.executePost(); Log.e("HttpTest", result); } publicvoid testExecuteHttpGet() { Log.e("HttpTest", "testExecuteHttpGet"); HttpClientTest client = HttpClientTest.getInstance(); String result = client.executeHttpGet(); Log.e("HttpTest", result); } publicvoid 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：

?publicclass HttpClientTest { privatestatic final Object mSyncObject = newObject(); privatestatic HttpClientTest mInstance; privateHttpClientTest() { } publicstatic HttpClientTest getInstance() { synchronized(mSyncObject) { if(mInstance != null) { returnmInstance; } mInstance = newHttpClientTest(); } returnmInstance; } /**...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：

?<manifestxmlns:android=" package="com.alexzhou.androidhttp" android:versionCode="1" android:versionName="1.0"> <uses-permissionandroid:name="android.permission.INTERNET"/> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion=""/> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme"> <uses-libraryandroid:name="android.test.runner"/> <activity android:name=".MainActivity" android:label="@string/title_activity_main"> <intent-filter> <actionandroid:name="android.intent.action.MAIN"/> <categoryandroid:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> <instrumentation android:name="android.test.InstrumentationTestRunner" android:targetPackage="com.alexzhou.androidhttp"/> </manifest>

注意：android:name=”android.test.InstrumentationTestRunner”这部分不用更改android:targetPackage=”com.alexzhou.androidhttp”，填写应用程序的包名

5.测试结果展开测试类HttpTest，依次选中这四个测试方法，右击：Run As–》Android Junit Test。(1)运行testExecuteHttpGet，结果如图：(2)运行testExecuteHttpPost，结果如图：(3)运行testExecuteGet，结果如图：(4)运行testExecutePost，结果如图：

转载请注明来自：Alex Zhou，本文链接：

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