Android HTTP Programming notes

Template file

<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:tools= "http// Schemas.android.com/tools "android:id=" @+id/container "android:orientation=" vertical "android:layout_width=" match _parent "android:layout_height=" match_parent "><textview android:id=" @+id/tv_user "android:layout_width=" WR Ap_content "android:layout_height=" wrap_content "android:text=" user name "/><edittext android:id=" @+id/et_use R "android:layout_width=" Fill_parent "android:layout_height=" wrap_content "android:hint=" please fill in the user name "/><Text View android:id= "@+id/tv_pass" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" Andro id:text= "Password"/><edittext android:id= "@+id/et_pass" android:layout_width= "Fill_parent" android:layout_he ight= "wrap_content" android:hint= "please fill in the password"/><button android:id= "@+id/button" android:layout_width= "Fill_ Parent "android:layout_height=" Wrap_content "    android:text= "Get Login" android:onclick= "GetLogin"/><button android:id= "@+id/button2" Android:layout_ Width= "Fill_parent" android:layout_height= "wrap_content" android:text= "Post Login" android:onclick= "PostLogin"/&G T;<button android:layout_width= "fill_parent" android:layout_height= "wrap_content" android:text= "HttpClientGet Login "android:onclick=" Clientgetlogin "/><button android:layout_width=" fill_parent "Android:layout_height" = "Wrap_content" android:text= "httpclientpost Login" android:onclick= "Clientpostlogin"/></linearlayout>

Mainactivity

Package Com.http.action;import Com.login.service.loginservice;import Android.app.activity;import Android.app.actionbar;import Android.app.fragment;import Android.os.bundle;import Android.os.Handler;import Android.os.message;import Android.view.layoutinflater;import Android.view.menu;import Android.view.MenuItem; Import Android.view.view;import Android.view.viewgroup;import Android.widget.edittext;import Android.widget.textview;import Android.widget.toast;import Android.os.build;public class MainActivity extends Activity {protected static final int login_success = 1;protected static final int login_error = 2;private EditText et_user ;p rivate EditText et_pass;private Handler Handler = new Handler () {public void Handlemessage (Android.os.Message Message) { Switch (message.what) {case LOGIN_SUCCESS:Toast.makeText (mainactivity.this, (String) message.obj, Toast.length_short ). Show (); Break;case LOGIN_ERROR:Toast.makeText (mainactivity.this, "Login Failed", Toast.length_short). Show (); break;}}; @OverrideproteCTED void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.activity _main); et_user = (EditText) Findviewbyid (r.id.et_user); et_pass = (EditText) Findviewbyid (R.id.et_pass);} /** * Login * @param view */public void GetLogin (view view) {Final String user = Et_user.gettext (). toString (). Trim (); final Str ing pass = et_pass.gettext (). toString (). Trim (); new Thread () {public void run () {String res = loginservice.bygetlogin (user , pass), if (res! = NULL) {message msg = new Message (); msg.what = Login_success;msg.obj = Res;handler.sendmessage (msg);} El SE {message msg = new Message (); msg.what = Login_error;handler.sendmessage (msg);}}}. Start ();} /** * Post Method submitted * @param view */public void Postlogin (view view) {Final String user = Et_user.gettext (). toString (). Trim (); f Inal String pass = Et_pass.gettext (). toString (). Trim (); new Thread () {public void run () {String Text = Loginservice.bypostlogin (user, pass), if (text! = null) {message msg = new Message (); msg.what = Login_sucCess;msg.obj = Text;handler.sendmessage (msg);} else {message msg = new Message (); msg.what = Login_error;handler.sendmessage (msg);}}}. Start ();} /** * Client Get login * @param view */public void Clientgetlogin (view view) {Final String user = Et_user.gettext (). Tostrin g (). Trim (); final String pass = Et_pass.gettext (). toString (). Trim (); new Thread () {public void run () {String res = Loginservice.httpclientgetlogin (user, pass); if (res! = NULL) {message msg = new Message (); msg.what = Login_success;msg.ob j = res;handler.sendmessage (msg);} else {message msg = new Message (); msg.what = Login_error;handler.sendmessage (msg);}}}. Start ();} /** * Client Post login * @param view */public void Clientpostlogin (view view) {Final String user = Et_user.gettext (). tostr ing (). Trim (); final String pass = Et_pass.gettext (). toString (). Trim (); new Thread () {public void run () {String res = Loginservice.httpclientpostlogin (user, pass); if (res! = NULL) {message msg = new Message (); msg.what = LOGIN_SUCCESS;MSG.O BJ = Res;handler.sEndmessage (msg);} else {message msg = new Message (); msg.what = Login_error;handler.sendmessage (msg);}}}. Start ();}}

Loginservice

Package Com.login.service;import Java.io.inputstream;import Java.io.outputstream;import Java.io.unsupportedencodingexception;import Java.net.httpurlconnection;import java.net.MalformedURLException; Import Java.net.url;import java.util.arraylist;import Java.util.list;import Org.apache.http.httpconnection;import Org.apache.http.httpresponse;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.impl.client.defaulthttpclient;import Org.apache.http.message.basicnamevaluepair;import Com.stream.utils.stream;public class LoginService {/** * submitted by Get method * @param user * @param pass * @return */static public string Bygetlogin (string user, String pass) {string path = "Http://19 2.168.0.105/index.php?user= "+user+" &pass= "+pass;try {URL url = new URL (path); HttpURLConnection conn = (httpurlconnection) url.opEnconnection (); Conn.setreadtimeout () Conn.setrequestmethod ("GET"); int code = Conn.getresponsecode (); SYSTEM.OUT.PRINTLN (code), if (code = =) {InputStream is = Conn.getinputstream (); String Text = stream.istostring (is); return text;} else {return null;}} catch (Exception e) {//TODO auto-generated catch Blocke.printstacktrace (); return null;}}  /** * Submit via Post * @param user * @param pass * @return */static public string Bypostlogin (string user, String pass) {string Path = "http://192.168.0.105/index.php"; try {URL url = new URL (path); HttpURLConnection conn = (httpurlconnection) url.openconnection (); Conn.setrequestmethod ("POST"); String data = "user=" +user+ "&pass=" +pass;conn.setrequestproperty ("Content-type", "application/ X-www-form-urlencoded "); Conn.setrequestproperty (" Content-length ", data.length () +" "); Conn.setdooutput (true); O Utputstream OS = Conn.getoutputstream (); Os.write (Data.getbytes ()); int code = Conn.getresponsecode (); if (code = = 200) { InputStream is = Conn.getinputstream (); RETUrn stream.istostring (IS); } else {return null;}} catch (Exception e) {e.printstacktrace (); return null;}} /** * with HttpClient get submit * @param user * @param pass * @return */static public string Httpclientgetlogin (string user, Str ing pass) {String path = "http://192.168.0.105/index.php?user=" +user+ "&pass=" +pass;try {HttpClient client = new Defaulthttpclient (); HttpGet get = new HttpGet (path); HttpResponse response = Client.execute (get), int code = Response.getstatusline (). Getstatuscode (); if (code = = 200) { InputStream is = Response.getentity (). getcontent (); String Text = stream.istostring (is); return text;} return null;} catch (Exception e) {//TODO auto-generated catch Blocke.printstacktrace (); return null;}} /** * HttpClient Post Method submitted * @param user * @param pass * @return */static public string Httpclientpostlogin (string user, S Tring Pass) {String path = "http://192.168.0.105/index.php"; HttpClient client = new Defaulthttpclient (); HttpPost post = new HttpPost (path); List<namevaluepair> parAmeters = new arraylist<namevaluepair> ();p Arameters.add (New Basicnamevaluepair ("user", user);p Arameters.add ( New Basicnamevaluepair ("Pass", pass)), try {post.setentity (new urlencodedformentity (Parameters, "UTF-8")); HttpResponse response = Client.execute (post); int code = Response.getstatusline (). Getstatuscode (); if (code = = 200) { InputStream is = Response.getentity (). getcontent (); String Text = stream.istostring (is); return text;} return null;} catch (Exception e) {//TODO auto-generated catch Blocke.printstacktrace (); return null;}}}

Stream converts input flow to string

Package Com.stream.utils;import Java.io.bytearrayoutputstream;import Java.io.ioexception;import Java.io.inputstream;public class Stream {/** * turns an input stream into a string * @param is * @return * @throws ioexception */static public Str ing istostring (InputStream is) throws Ioexception{bytearrayoutputstream BAOs = new Bytearrayoutputstream (); int len = 0;by te[] buffer = new Byte[1024];while (len = is.read (buffer))! =-1) {baos.write (buffer);} Byte[] result = Baos.tobytearray (); Is.close (); Baos.close (); return new String (result);}}

Remember manifest file permissions

<uses-permission android:name= "Android.permission.INTERNET"/>

Android HTTP Programming notes