Android ile restful webservice kullanımını

By Mehmet Kılıç Last updated Jul 28, 2018

Merhaba arakdaşlar,

Bu yazımda android ile restful web servis kullanımını anlatacağım. İlk önce rest servis tarafını yazalım.

Servisi yazacağımız projemiz springboot olacaktır. Maven ile oluşturacağımız için kütüphanelerimizi pom.xml’e ekliyoruz.

pom.xml



<?xml version="1.0"?>
<project
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

	<modelVersion>4.0.0</modelVersion>
	<packaging>jar</packaging>
	<groupId>io.bilisim.message</groupId>
	<artifactId>AndroidRestCallService</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>AndroidRestCallService</name>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<java.version>1.8</java.version>
	</properties>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.3.6.RELEASE</version>
	</parent>

	<dependencies>

		
		<dependency>
			<groupId>javax.ws.rs</groupId>
			<artifactId>jsr311-api</artifactId>
			<version>1.1.1</version>
		</dependency>


		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		
		<dependency>
			<groupId>com.google.code.gson</groupId>
			<artifactId>gson</artifactId>
		</dependency>

	

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

<?xml version="1.0"?>

<project

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"

xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<groupId>io.bilisim.message</groupId>

<artifactId>AndroidRestCallService</artifactId>

<version>0.0.1-SNAPSHOT</version>

<name>AndroidRestCallService</name>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<java.version>1.8</java.version>

</properties>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.3.6.RELEASE</version>

</parent>

<groupId>javax.ws.rs</groupId>

</dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-test</artifactId>

</dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</dependency>

<groupId>com.google.code.gson</groupId>

</dependency>

</dependencies>

<build>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

</plugin>

</plugins>

</build>

</project>

Projemizde src/main/resources dizininin altına application.properties isminde proje konfigurasyonlarının olduğu bir dosya açıyoruz ve ilgili değerleri giriyoruz.Bu dosyada tomcat’in hangi port’u kullanacağını yaazıyoruz.

Application.properties



server.port=8095

server.port=8095

Android uygulamamızda ekrandan girilen bir text ‘i servisimizin endpointin’e bir object olarak post edeceğiz.Bu yüzden modelimiz şu şekidle olacaktır.
MessageObject.java



package io.bilisim.message.modal;

public class MessageObject {
	
	public String data;


	public String getData() {
		return data;
	}

	public void setData(String data) {
		this.data = data;
	}
}

package io.bilisim.message.modal;

public class MessageObject {

public String data;

public String getData() {

return data;

}

public void setData(String data) {

this.data = data;

}

Şimdi ise endpointimizi yazalım. Entpointimiz post edilen objenin çerisindeki data fieldini konsola yazsın.

MailServiceController.java



package io.bilisim.message.controller;

import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import org.apache.tomcat.util.codec.binary.Base64;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;


import io.bilisim.modal.MessageObject;




@RestController
@RequestMapping("/message")
public class MailServiceController {

	@Value("${mail.username}")
	String username;
	@Value("${mail.password}")
	String password;

	@RequestMapping(value = "/running", method = RequestMethod.GET)
	@Consumes({ MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML })
	@Produces({ MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML })
	public String running() {
        System.out.println("www.bilisim.io");
		return "true";
	}
	
	
	
	//Endpointimiz url+controller path+ method path şeklinde olacaktır.
	//localhost:8095/message
	@RequestMapping(value = "/showMessage", method = RequestMethod.POST)
	@Consumes({ MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML })
	@Produces({ MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML })
	public String showMessage(@RequestBody MessageObject messageObject) {
		System.out.println("www.bilisim.io");
		System.out.println("gelen mesaj : " + messageObject.getData());
		return messageObject.getData();
	}	
}

package io.bilisim.message.controller;

import javax.ws.rs.Consumes;

import javax.ws.rs.Produces;

import javax.ws.rs.core.MediaType;

import org.apache.tomcat.util.codec.binary.Base64;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.PropertySource;

import org.springframework.http.HttpStatus;

import org.springframework.http.ResponseEntity;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.RestController;

import io.bilisim.modal.MessageObject;

@RestController

@RequestMapping("/message")

public class MailServiceController {

@Value("${mail.username}")

String username;

@Value("${mail.password}")

String password;

@RequestMapping(value = "/running", method = RequestMethod.GET)

@Consumes({ MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML })

@Produces({ MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML })

public String running() {

System.out.println("www.bilisim.io");

return "true";

}

//Endpointimiz url+controller path+ method path şeklinde olacaktır.

//localhost:8095/message

@RequestMapping(value = "/showMessage", method = RequestMethod.POST)

@Consumes({ MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML })

@Produces({ MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML })

public String showMessage(@RequestBody MessageObject messageObject) {

System.out.println("www.bilisim.io");

System.out.println("gelen mesaj : " + messageObject.getData());

return messageObject.getData();

}

Projemiz SpringBoot olduğu için application sınıfımız şu şekilde olacaktır.

Application.java



package io.bilisim.message;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * mkilic
 *
 */
@SpringBootApplication
public class Application 
{
	 private static final Logger logger = LoggerFactory.getLogger(Application.class);
	    
		public static void main(String[] args) {
			logger.info("application start");
			SpringApplication.run(Application.class, args);
		}
}

package io.bilisim.message;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

/**

* mkilic

@SpringBootApplication

public class Application

{

private static final Logger logger = LoggerFactory.getLogger(Application.class);

public static void main(String[] args) {

logger.info("application start");

SpringApplication.run(Application.class, args);

}

Servisimizi test edelim ve url şu şekilde olacaktır.

http://localhost:8095/message/showMessage

——>

Şimdi ise android tarafına geçelim.

Android studio ile yeni bir proje oluşturuyoruz . İlk önce bağımlılıklarımızı projemize ekleyelim.
build.gradle



apply plugin: 'com.android.application'

android {
    compileSdkVersion 24
    buildToolsVersion "24.0.2"
    defaultConfig {
        applicationId "bilisim.io.restcallexample"
        minSdkVersion 10
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

android {
    useLibrary 'org.apache.http.legacy'
}


dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:24.2.1'
    compile 'com.android.support:design:24.2.1'
    compile 'org.apache.httpcomponents:httpcore:4.4.1'
    compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.0-alpha4'
    compile 'org.apache.httpcomponents:httpclient:4.5'
    compile 'com.google.android.gms:play-services-appindexing:8.4.0'
    compile group: 'org.json', name: 'json', version: '20090211'
    compile 'com.loopj.android:android-async-http:1.4.9'
    compile 'org.springframework.android:spring-android-rest-template:1.0.1.RELEASE'
    testCompile 'junit:junit:4.12'
}

apply plugin: 'com.android.application'

android {

compileSdkVersion 24

buildToolsVersion "24.0.2"

defaultConfig {

applicationId "bilisim.io.restcallexample"

minSdkVersion 10

targetSdkVersion 24

versionCode 1

versionName "1.0"

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

}

android {

useLibrary 'org.apache.http.legacy'

}

dependencies {

compile fileTree(dir: 'libs', include: ['*.jar'])

androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {

exclude group: 'com.android.support', module: 'support-annotations'

})

compile 'com.android.support:appcompat-v7:24.2.1'

compile 'com.android.support:design:24.2.1'

compile 'org.apache.httpcomponents:httpcore:4.4.1'

compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.0-alpha4'

compile 'org.apache.httpcomponents:httpclient:4.5'

compile 'com.google.android.gms:play-services-appindexing:8.4.0'

compile group: 'org.json', name: 'json', version: '20090211'

compile 'com.loopj.android:android-async-http:1.4.9'

compile 'org.springframework.android:spring-android-rest-template:1.0.1.RELEASE'

testCompile 'junit:junit:4.12'

}

Ekranımızda TextView ve butondan oluşmaktadır. TextView ‘e yazıdığımız metni butona bastığımızda sunucumuzdaki rest servise göndermesini isteyeceğiz.

Şimdi ise MainActivity.java sınıfımızı yazalım. Çok basit bir şekilde ekranda butona basıldığında textview da olan text’I sunucumuza post ediyor.

MainActivity.java



package bilisim.io.restcallexample;

import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;


import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class MainActivity extends AppCompatActivity {
    String url = "http://xxxxxxxxxxxx:8095/message/showMessage";
    String veri_string;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final EditText editText = (EditText) findViewById(R.id.editText);
        final  Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v)
            {
                String msg = editText.getText().toString();
				//Service post ettiğimiz yer
                sendWebservis(msg);
                Toast.makeText(getBaseContext(), "Mesaj gödnerildi : " + msg, Toast.LENGTH_LONG).show();
            }
        });
    }




    public void sendWebservis(String data){
        new HttpAsyncTaskPost().execute(url, data);

    }

    public String Post(String url,String message)
    {
        InputStream inputStream = null;
        String result = "";

        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);

        String json = "";

        JSONObject jsonObject = new JSONObject();

        try {
            //gönderilecek bilgilerin json objesine eklendiği kısım
            jsonObject.accumulate("data", message);


        } catch (JSONException e2) {
            e2.printStackTrace();
        }
        try {
            json = jsonObject.toString();

            StringEntity se = null;
            se = new StringEntity(json, "UTF-8");
            httppost.setEntity(se);
        } catch (Exception e23) {
            // TODO Auto-generated catch block
            e23.printStackTrace();
        }
        httppost.setHeader("Accept", "application/json");
        httppost.setHeader("Accept-Encoding", "utf-8");
        httppost.setHeader("Accept-Language", "tr-TR");
        httppost.setHeader("Content-Type", "application/json");
        HttpResponse httpResponse = null;
        try {
            httpResponse = httpclient.execute(httppost);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        if(httpResponse.getEntity() != null)
        {
            try {
                inputStream = httpResponse.getEntity().getContent();
            } catch (IllegalStateException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {

                e.printStackTrace();
            }
            if(inputStream != null)
            {
                try {
                    result = convertInputStreamToString(inputStream);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            else
            {
                result = "hata var!";
            }
        }

        return result;
    }

    private static String convertInputStreamToString(InputStream inputStream) throws IOException{
        BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
        String line = "";
        String result = "";
        while((line = bufferedReader.readLine()) != null)
            result += line;

        inputStream.close();
        return result;

    }
    private class HttpAsyncTaskPost extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... urls) {

            return Post(urls[0],urls[1]);
        }
    }
}

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package bilisim.io.restcallexample;

import android.os.AsyncTask;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

import org.apache.http.HttpResponse;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.DefaultHttpClient;

import org.json.JSONException;

import org.json.JSONObject;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

public class MainActivity extends AppCompatActivity {

String url = "http://xxxxxxxxxxxx:8095/message/showMessage";

String veri_string;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

final EditText editText = (EditText) findViewById(R.id.editText);

final Button button = (Button) findViewById(R.id.button);

button.setOnClickListener(new View.OnClickListener() {

public void onClick(View v)

{

String msg = editText.getText().toString();

//Service post ettiğimiz yer

sendWebservis(msg);

Toast.makeText(getBaseContext(), "Mesaj gödnerildi : " + msg, Toast.LENGTH_LONG).show();

}

});

}

public void sendWebservis(String data){

new HttpAsyncTaskPost().execute(url, data);

}

public String Post(String url,String message)

{

InputStream inputStream = null;

String result = "";

HttpClient httpclient = new DefaultHttpClient();

HttpPost httppost = new HttpPost(url);

String json = "";

JSONObject jsonObject = new JSONObject();

try {

//gönderilecek bilgilerin json objesine eklendiği kısım

jsonObject.accumulate("data", message);

} catch (JSONException e2) {

e2.printStackTrace();

}

try {

json = jsonObject.toString();

StringEntity se = null;

se = new StringEntity(json, "UTF-8");

httppost.setEntity(se);

} catch (Exception e23) {

// TODO Auto-generated catch block

e23.printStackTrace();

}

httppost.setHeader("Accept", "application/json");

httppost.setHeader("Accept-Encoding", "utf-8");

httppost.setHeader("Accept-Language", "tr-TR");

httppost.setHeader("Content-Type", "application/json");

HttpResponse httpResponse = null;

try {

httpResponse = httpclient.execute(httppost);

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

if(httpResponse.getEntity() != null)

{

try {

inputStream = httpResponse.getEntity().getContent();

} catch (IllegalStateException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

if(inputStream != null)

{

try {

result = convertInputStreamToString(inputStream);

} catch (IOException e) {

e.printStackTrace();

}

else

{

result = "hata var!";

}

return result;

}

private static String convertInputStreamToString(InputStream inputStream) throws IOException{

BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));

String line = "";

String result = "";

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

result += line;

inputStream.close();

return result;

}

private class HttpAsyncTaskPost extends AsyncTask<String, Void, String> {

@Override

protected String doInBackground(String... urls) {

return Post(urls[0],urls[1]);

}

Şimdi ise test edelim. Telefonumuzdan gönder dediğimizde sunucu konsoluna post ettiğimiz text düşecekmi gözlemleyelim.

Gördüğünüz üzere konsola yazımız ulaştı.
Umarım yararlı olmuştur.

iyi Çalışmalar