Use of the Android post method

Java code

 PackageXidian.dy.com.chujia;ImportAndroid.os.Bundle;ImportAndroid.os.Handler;ImportAndroid.os.Message;Importandroid.support.v7.app.AppCompatActivity;ImportAndroid.util.Log;ImportAndroid.view.View;ImportAndroid.widget.Button;ImportAndroid.widget.EditText;ImportAndroid.widget.Toast;ImportJava.io.InputStream;ImportJava.io.OutputStream;Importjava.net.HttpURLConnection;ImportJava.net.URL; Public classMainactivityextendsappcompatactivity {String username;    String password; Handler Handler=NewHandler () {@Override Public voidhandlemessage (Message msg) {Toast.maketext (mainactivity. This, (String) msg.obj, Toast.length_short). Show ();    }    }; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Button Submit=(Button) Findviewbyid (r.id.submit); if(Submit! =NULL) Submit.setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (View v) {EditText Etuser=(EditText) Findviewbyid (r.id.username); EditText Etpass=(EditText) Findviewbyid (R.id.password); if(Etpass! =NULL&& Etuser! =NULL) {username=Etuser.gettext (). toString (); Password=Etpass.gettext (). toString (); LOG.I ("Login_username", username); LOG.I ("Login_password", password);            } login ();    }        }); }    Private voidLogin () {NewThread (NewRunnable () {@Override Public voidrun () {Try {URL url =NewURL ("http://192.168.0.162/test.php"); HttpURLConnection Conn=(HttpURLConnection) url.openconnection (); Conn.setrequestmethod ("POST"); Conn.setconnecttimeout (5000); Conn.setreadtimeout (5000); StringBuilder SB=NewStringBuilder (); Sb.append ("Username="). Append (username). Append ("&password=").). append (password); Conn.setrequestproperty ("Content-type", "application/x-www-form-urlencoded"); Conn.setrequestproperty ("Content-length", sb.length () + ""); //Open Input StreamConn.setdooutput (true); //Establish a connection//the sequence of connections and open streams cannot be confusedConn.connect (); OutputStream OS=Conn.getoutputstream ();                    Os.write (Sb.tostring (). GetBytes ()); //Get Server answer data                    if(Conn.getresponsecode () = = 200) {InputStream is=Conn.getinputstream (); String text=Utils.gettextfromstream (IS); Message msg=Handler.obtainmessage (); Msg.obj=text;                        Handler.sendmessage (msg);                    Is.close ();                } os.close (); } Catch(Exception e) {e.printstacktrace ();    }}). Start (); }}

Layout file

<?XML version= "1.0" encoding= "Utf-8"?><LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"android:orientation= "vertical"Tools:context= "Xidian.dy.com.chujia.MainActivity">        <RelativelayoutAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content">                <TextViewAndroid:id= "@+id/usr"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"android:textsize= "22SP"Android:text= "User name"/>                <EditTextAndroid:id= "@+id/username"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:layout_torightof= "@+id/usr"/>        </Relativelayout>        <RelativelayoutAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content">                <TextViewAndroid:id= "@+id/p"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"android:textsize= "22SP"Android:text= "Password"/>                <EditTextAndroid:id= "@+id/password"Android:inputtype= "Textpassword"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:layout_torightof= "@+id/p"/>        </Relativelayout>        <ButtonAndroid:id= "@+id/submit"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Submit"/></LinearLayout>

Tool class

 PackageXidian.dy.com.chujia;ImportJava.io.ByteArrayOutputStream;Importjava.io.IOException;ImportJava.io.InputStream;/*** Created by Dy on 2016/6/28.*/ Public classUtils { Public StaticString Gettextfromstream (InputStream is) {byte[] B =New byte[1024]; intLen = 0; //creates a byte array output stream and reads the text data of the input stream, synchronously writes the data to the array output streamBytearrayoutputstream BOS =NewBytearrayoutputstream (); Try {             while(len = Is.read (b))! =-1) {Bos.write (b,0, Len); }            //converts data in a byte array output stream into a byte arrayString Text =NewString (Bos.tobytearray ()); returntext; } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        return NULL; }}

Use of the Android post method