jeromq java sample

java/jeromq/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

java/jeromq/app/.gitignore

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+/build

java/jeromq/app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.example.jeromq"
+        minSdkVersion 26
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:appcompat-v7:28.0.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+
+    // https://mvnrepository.com/artifact/org.zeromq/jeromq
+    implementation group: 'org.zeromq', name: 'jeromq', version: '0.3.3'
+}

java/jeromq/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

java/jeromq/app/src/androidTest/java/com/example/jeromq/ExampleInstrumentedTest.java

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+package com.example.jeromq;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.example.jeromq", appContext.getPackageName());
+    }
+}

java/jeromq/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.jeromq">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+</manifest>

java/jeromq/app/src/main/java/com/example/jeromq/MainActivity.java

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+package com.example.jeromq;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.TextView;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class MainActivity extends AppCompatActivity {
+
+	private static final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mmZ");
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_main);
+
+		_textView = (TextView)findViewById(R.id.textView);
+		_editText = (EditText)findViewById(R.id.editText);
+
+		new Thread(new ZeroMQServer(_serverMessageHandler)).start();
+
+		findViewById(R.id.button).setOnClickListener(
+			new View.OnClickListener() {
+				@Override
+				public void onClick(View v) {
+					new ZeroMQMessageTask(_clientMessageHandler).execute(_editText.getText().toString());
+				}
+			}
+		);
+	}
+
+	private static String getTimeString() {
+		return DATE_FORMAT.format(new Date());
+	}
+
+	private final MessageListenerHandler _serverMessageHandler = new MessageListenerHandler(
+		new MessageListener() {
+			@Override
+			public void messageReceived(String messageBody) {
+				_textView.append(getTimeString() + " - server received: " + messageBody + "\n");
+			}
+		}, Util.MESSAGE_PAYLOAD_KEY
+	);
+
+	private final MessageListenerHandler _clientMessageHandler = new MessageListenerHandler(
+		new MessageListener() {
+			@Override
+			public void messageReceived(String messageBody) {
+				_textView.append(getTimeString() + " - client received: " + messageBody + "\n");
+			}
+		}, Util.MESSAGE_PAYLOAD_KEY
+	);
+
+	private TextView _textView;
+	private EditText _editText;
+}

java/jeromq/app/src/main/java/com/example/jeromq/MessageListener.java

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+package com.example.jeromq;
+
+public interface MessageListener {
+	void messageReceived(String messageBody);
+}

java/jeromq/app/src/main/java/com/example/jeromq/MessageListenerHandler.java

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+package com.example.jeromq;
+
+import android.os.Handler;
+import android.os.Message;
+
+public class MessageListenerHandler extends Handler {
+
+	public MessageListenerHandler(MessageListener messageListener, String payloadKey) {
+		_messageListener = messageListener;
+		_payloadKey = payloadKey;
+	}
+
+	@Override
+	public void handleMessage(Message msg) {
+		_messageListener.messageReceived(msg.getData().getString(_payloadKey));
+	}
+
+	private final MessageListener _messageListener;
+	private final String _payloadKey;
+}

java/jeromq/app/src/main/java/com/example/jeromq/Util.java

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+package com.example.jeromq;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+
+public class Util {
+
+	public static final String MESSAGE_PAYLOAD_KEY = "jeromq-service-payload";
+
+	public static char[] reverseInPlace(byte[] input){
+
+		char[] string = new char[input.length];
+		for(int i=0;i < input.length;i++){
+			string[i] = (char)input[i];
+		}
+
+		for(int i = 0, j = string.length - 1; i < string.length / 2; i++, j--) {
+			char c = string[i];
+			string[i] = string[j];
+			string[j] = c;
+		}
+		return string;
+	}
+
+	public static Message bundledMessage(Handler uiThreadHandler, String msg) {
+		Message m = uiThreadHandler.obtainMessage();
+		prepareMessage(m, msg);
+		return m;
+	}
+
+	public static void prepareMessage(Message m, String msg){
+		Bundle b = new Bundle();
+		b.putString(MESSAGE_PAYLOAD_KEY, msg);
+		m.setData(b);
+		return;
+	}
+}

java/jeromq/app/src/main/java/com/example/jeromq/ZeroMQMessageTask.java

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+package com.example.jeromq;
+
+import android.os.AsyncTask;
+import android.os.Handler;
+
+import org.zeromq.ZMQ;
+
+public class ZeroMQMessageTask extends AsyncTask<String, Void, String> {
+
+	public ZeroMQMessageTask(Handler uiThread) {
+		_uiThread = uiThread;
+	}
+
+	@Override
+	protected String doInBackground(String ... params) {
+		ZMQ.Context ctx = ZMQ.context(1);
+		ZMQ.Socket req = ctx.socket(ZMQ.REQ);
+		req.connect("tcp://127.0.0.1:5555");
+
+		req.send(params[0].getBytes(), 0);
+		String result = new String(req.recv(0));
+
+		req.close();
+		ctx.term();
+
+		return result;
+	}
+
+	@Override
+	protected void onPostExecute(String result) {
+		_uiThread.sendMessage(Util.bundledMessage(_uiThread, result));
+	}
+
+	private final Handler _uiThread;
+}

java/jeromq/app/src/main/java/com/example/jeromq/ZeroMQServer.java

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+package com.example.jeromq;
+
+import android.os.Handler;
+
+import org.zeromq.ZMQ;
+
+public class ZeroMQServer implements Runnable {
+
+	public ZeroMQServer(Handler uiThread) {
+		_uiThread = uiThread;
+	}
+
+	@Override
+	public void run() {
+		ZMQ.Context ctx = ZMQ.context(1);
+		ZMQ.Socket rep = ctx.socket(ZMQ.REP);
+		rep.bind("tcp://127.0.0.1:5555");
+
+		while (!Thread.currentThread().isInterrupted()) {
+			byte[] msg = rep.recv(0);
+			_uiThread.sendMessage(
+				Util.bundledMessage(_uiThread, new String(msg)));
+			rep.send(new String(Util.reverseInPlace(msg)), 0);
+		}
+
+		rep.close();
+		ctx.term();
+	}
+
+	private final Handler _uiThread;
+}

java/jeromq/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>