Data store--GET request mode for remote server storage--JDK

I. HTTP protocol

1. Hypertext Transfer Protocol

2. Support client/server-side mode

3. Content

1-Request Agreement

1> Request Message Format

1>-Request Line: Request Resource Name protocol version number;

2>-Request message Header

3>-Request Body

2> Request method

1>-post: Request content in the request body, in the form of key = value, key value pair with & interval, the length is unrestricted, the confidentiality is high.

2>-get: The request content is used after the URL? Starting with the key = value in the form of & interval between key-value pairs, the request message has no request, the length of the request data is limited by the browser, and the request data confidentiality is low.

2-Response Protocol: Response message Format

1> Response Status line: Describes the server processing result; The response status code is 200 successful.

2> Response message Header

3> Response Body

Two. Mode

1.JDK mode

2.Android mode

3. Frame mode

Get request mode code for JDK

Set Network access Permissions first:

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

1<?xml version= "1.0" encoding= "Utf-8"?>2<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"3Xmlns:tools= "Http://schemas.android.com/tools"4Android:layout_width= "Match_parent"5android:layout_height= "Match_parent"6android:paddingbottom= "@dimen/activity_vertical_margin"7android:paddingleft= "@dimen/activity_horizontal_margin"8android:paddingright= "@dimen/activity_horizontal_margin"9android:paddingtop= "@dimen/activity_vertical_margin"Tentools:context= "Com.hanqi.testapp3.TestActivity3" Oneandroid:orientation= "Vertical" > A  -<Button -Android:layout_width= "Match_parent" theandroid:layout_height= "Wrap_content" -android:text= "Jdk-get Way" -android:onclick= "Bt1_onclick"/> -  +<EditText -Android:layout_width= "Match_parent" +android:layout_height= "200DP" AAndroid:id= "@+id/et_2"/> at  -</LinearLayout>

. XML

1  Packagecom.hanqi.testapp3;2 3 ImportAndroid.app.ProgressDialog;4 Importandroid.support.v7.app.AppCompatActivity;5 ImportAndroid.os.Bundle;6 ImportAndroid.view.View;7 ImportAndroid.widget.EditText;8 ImportAndroid.widget.Toast;9 Ten ImportJava.io.InputStream; One Importjava.net.HttpURLConnection; A ImportJava.net.URL; -  -  Public classTestActivity3extendsappcompatactivity { the  -  - EditText et_2; -  + @Override -     protected voidonCreate (Bundle savedinstancestate) { +         Super. OnCreate (savedinstancestate); A Setcontentview (R.LAYOUT.ACTIVITY_TEST3); at  -Et_2=(EditText) Findviewbyid (r.id.et_2); -     } -  -     //get method for JDK -      Public voidBt1_onclick (View v) in     { -         //1. Progress dialog Box to         FinalProgressDialog ProgressDialog = Progressdialog.show ( This,NULL, "Loading, please later ..."); +  -         //2. Turn on the sub-thread to access the network the         NewThread () { *              Public voidRun () $             {Panax Notoginseng                 Try { -                 //1.URL theURL url =NewURL (Et_2.gettext (). toString () + "? Name=tom"); +  A                 //2.URL getting the connection theHttpURLConnection Huc =(HttpURLConnection) url.openconnection (); +  -                 //Request Method $Huc.setrequestmethod ("GET"); $  -                 //Set Timeout -Huc.setconnecttimeout (3000); theHuc.setreadtimeout (3000); - Wuyi                 //Connect and send requests the Huc.connect (); -  Wu                 //Receive -                 //determine the return status code About                 intCode =Huc.getresponsecode (); $  -                 if(Code = = 200) { -                     //Receive Data -                     //input Stream AInputStream is =Huc.getinputstream (); +  the                     //Read Stream -  $                     //1.byte Arrays the                     byte[] B =New byte[1024]; the  the                     //2. Read the length of the array the                     inti = 0; -  in                     //3. Data the                     FinalStringBuilder SBL =NewStringBuilder (); the  About                      while((i = Is.read (b)) > 0) { theSbl.append (NewString (b, 0, i)); the                     } the  +                     //Freeing Resources - is.close (); the Huc.disconnect ();Bayi  the                     //Displaying Information and closing dialog boxes via the main thread theRunonuithread (NewRunnable () { - @Override -                          Public voidrun () { the Et_2.settext (SBL); the  the Progressdialog.dismiss (); the                         } -                     }); the}Else { theToast.maketext (TestActivity3. This, "Connection error, return status code =" +code, Toast.length_short). Show (); the                 }94             } the                 Catch(Exception e) the                 { the e.printstacktrace ();98  About Progressdialog.dismiss (); -                 }101             }102 }.start ();103     }104}

. Java

Data store--GET request mode for remote server storage--JDK