Update tools versions & prepare JNI work to reduce memory & CPU usage

.travis.yml

@@ -23,3 +23,9 @@ android:
     - 'google-gdk-license-.+'
     - 'android-sdk-preview-license-.+'
     - 'android-.*'
+
+before_install:
+  - wget https://dl.google.com/android/repository/android-ndk-r15c-linux-x86_64.zip > /dev/null
+  - mkdir -p /usr/local/android-sdk/ndk-bundle
+  - unzip android-ndk-r15c-linux-x86_64.zip -d /usr/local/android-sdk/ndk-bundle > /dev/null
+  - export ANDROID_NDK_HOME="/usr/local/android-sdk/ndk-bundle/android-ndk-r15c"

CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.5.0)
+
+set (SRC_FILES
+	${CMAKE_CURRENT_SOURCE_DIR}/src/main/cpp/httpclient.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/src/main/cpp/nativesms.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/src/main/cpp/smsbuffer.cpp
+)
+
+find_library(LOGGING_LIBRARY log)
+
+add_library(nativesms SHARED ${SRC_FILES})
+
+target_link_libraries(nativesms ${LOGGING_LIBRARY})

build.gradle

@@ -25,6 +25,17 @@ android {
         minSdkVersion 16
         targetSdkVersion 26
         maxSdkVersion 26
+        ndk {
+            // Specifies the ABI configurations of your native
+            // libraries Gradle should build and package with your APK.
+            abiFilters 'x86', 'x86_64', 'armeabi', 'armeabi-v7a',
+                    'arm64-v8a'
+        }
+        externalNativeBuild {
+            cmake {
+                cppFlags "-frtti -fexceptions -std=c++11"
+            }
+        }
     }
 
     buildTypes {
@@ -36,6 +47,11 @@ android {
     packagingOptions {
         exclude  'META-INF/LICENSE.txt'
     }
+    externalNativeBuild {
+        cmake {
+            path 'CMakeLists.txt'
+        }
+    }
 }
 
 repositories {

src/main/cpp/httpclient.cpp

@@ -0,0 +1,56 @@
+/**
+ *  Copyright (c) 2017, Loic Blot <loic.blot@unix-experience.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "httpclient.h"
+
+const char *HTTPClient::classPathName = "fr/unix_experience/owncloud_sms/engine/OCHttpClient";
+
+// See https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/types.html
+JNINativeMethod HTTPClient::methods[] =
+{
+        DECL_JNIMETHOD(getAllSmsIdsCall, "()Ljava/lang/String;")
+        DECL_JNIMETHOD(getLastMsgTimestamp, "()Ljava/lang/String;")
+        DECL_JNIMETHOD(getPushRoute, "()Ljava/lang/String;")
+        DECL_JNIMETHOD(getVersionCall, "()Ljava/lang/String;")
+};
+DECL_METHODSIZE(HTTPClient)
+
+// APIv1 calls
+#define RCALL_GET_VERSION "/index.php/apps/ocsms/get/apiversion?format=json"
+#define RCALL_GET_ALL_SMS_IDS "/index.php/apps/ocsms/get/smsidlist?format=json"
+#define RCALL_GET_LAST_MSG_TIMESTAMP "/index.php/apps/ocsms/get/lastmsgtime?format=json"
+#define RCALL_PUSH_ROUTE "/index.php/apps/ocsms/push?format=json"
+
+jstring HTTPClient::getVersionCall(JNIEnv *env, jobject)
+{
+    return env->NewStringUTF(RCALL_GET_VERSION);
+}
+
+jstring HTTPClient::getAllSmsIdsCall(JNIEnv *env, jobject)
+{
+    return env->NewStringUTF(RCALL_GET_ALL_SMS_IDS);
+}
+
+jstring HTTPClient::getLastMsgTimestamp(JNIEnv *env, jobject)
+{
+    return env->NewStringUTF(RCALL_GET_LAST_MSG_TIMESTAMP);
+}
+
+jstring HTTPClient::getPushRoute(JNIEnv *env, jobject)
+{
+    return env->NewStringUTF(RCALL_PUSH_ROUTE);
+}

src/main/cpp/httpclient.h

@@ -0,0 +1,34 @@
+/**
+ *  Copyright (c) 2017, Loic Blot <loic.blot@unix-experience.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <jni.h>
+#include "macro_helpers.h"
+
+class HTTPClient
+{
+public:
+    JNIEXPORT static jstring JNICALL getVersionCall(JNIEnv *env, jobject);
+    JNIEXPORT static jstring JNICALL getAllSmsIdsCall(JNIEnv *env, jobject);
+    JNIEXPORT static jstring JNICALL getLastMsgTimestamp(JNIEnv *env, jobject);
+    JNIEXPORT static jstring JNICALL getPushRoute(JNIEnv *env, jobject);
+
+    DECL_JNICLASSATTRS
+};
+
+

src/main/cpp/macro_helpers.h

@@ -0,0 +1,29 @@
+/**
+ *  Copyright (c) 2017, Loic Blot <loic.blot@unix-experience.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define DECL_JNIMETHOD(name, type) \
+    {#name, type, (void*) &name },
+
+#define DECL_METHODSIZE(T) \
+    int T::methods_size = sizeof(T::methods) / sizeof(T::methods[0]);
+
+#define DECL_JNICLASSATTRS \
+    static const char *classPathName; \
+    static JNINativeMethod methods[]; \
+    static int methods_size;

src/main/cpp/nativesms.cpp

@@ -0,0 +1,76 @@
+/**
+ *  Copyright (c) 2014-2017, Loic Blot <loic.blot@unix-experience.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <jni.h>
+#include <android/log.h>
+#include "httpclient.h"
+#include "smsbuffer.h"
+
+#define LOG_TAG "nativesms.cpp"
+
+/*
+ * Register several native methods for one class.
+ */
+static int registerNativeMethods(JNIEnv* env, const char* className,
+                                 JNINativeMethod* gMethods, int numMethods)
+{
+    jclass clazz;
+    clazz = env->FindClass(className);
+    __android_log_print(ANDROID_LOG_INFO, LOG_TAG, "Registering class '%s'", className);
+    if (clazz == NULL) {
+        __android_log_print(ANDROID_LOG_FATAL, LOG_TAG, "Native registration unable to find class %s", className);
+        return JNI_FALSE;
+    }
+    if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) {
+        __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, "RegisterNatives failed for %s", className);
+        return JNI_FALSE;
+    }
+    return JNI_TRUE;
+}
+
+static int registerNatives(JNIEnv* env)
+{
+    if (!registerNativeMethods(env,
+                               HTTPClient::classPathName,
+                               HTTPClient::methods,
+                               HTTPClient::methods_size)) {
+        return JNI_FALSE;
+    }
+
+    if (!registerNativeMethods(env,
+                               SmsBuffer::classPathName,
+                               SmsBuffer::methods,
+                               SmsBuffer::methods_size)) {
+        return JNI_FALSE;
+    }
+
+    return JNI_TRUE;
+}
+
+jint JNI_OnLoad(JavaVM* vm, void* reserved)
+{
+    __android_log_print(ANDROID_LOG_INFO, LOG_TAG, "NativeSMS library loading...");
+    JNIEnv* env;
+    if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
+        return -1;
+    }
+
+    registerNatives(env);
+
+    __android_log_print(ANDROID_LOG_INFO, LOG_TAG, "NativeSMS library loaded.");
+    return JNI_VERSION_1_6;
+}

src/main/cpp/smsbuffer.cpp

@@ -0,0 +1,94 @@
+/**
+ *  Copyright (c) 2017, Loic Blot <loic.blot@unix-experience.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <android/log.h>
+#include "smsbuffer.h"
+
+#define LOG_TAG "SmsBuffer"
+const char *SmsBuffer::classPathName = "fr/unix_experience/owncloud_sms/jni/SmsBuffer";
+
+// See https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/types.html
+JNINativeMethod SmsBuffer::methods[] =
+{
+    DECL_JNIMETHOD(createNativeObject, "()J")
+    DECL_JNIMETHOD(deleteNativeObject, "(J)V")
+    DECL_JNIMETHOD(push, "(JI)V")
+    DECL_JNIMETHOD(print, "(J)V")
+};
+DECL_METHODSIZE(SmsBuffer)
+
+jlong SmsBuffer::createNativeObject(JNIEnv *env, jobject self)
+{
+    return reinterpret_cast<jlong>(new SmsBuffer());
+}
+
+void SmsBuffer::deleteNativeObject(JNIEnv *env, jobject self, jlong ptr)
+{
+    __android_log_print(ANDROID_LOG_INFO, LOG_TAG, "deleteSmsBuffer");
+    delete reinterpret_cast<SmsBuffer *>(ptr);
+}
+
+SmsBuffer::SmsBuffer()
+{
+}
+
+void SmsBuffer::reset_buffer()
+{
+    m_buffer.clear();
+    m_buffer_empty = true;
+}
+void SmsBuffer::push(JNIEnv *env, jobject self, jlong ptr, jint mailbox_id)
+{
+    SmsBuffer *me = reinterpret_cast<SmsBuffer *>(ptr);
+    if (!me) {
+        __android_log_print(ANDROID_LOG_FATAL, LOG_TAG, "It's not a SmsBuffer!");
+        return;
+    }
+
+    me->_push(mailbox_id);
+}
+
+void SmsBuffer::_push(int mailbox_id)
+{
+    // If buffer is not empty, we are joining messages
+    if (!m_buffer_empty) {
+        m_buffer << ",";
+    }
+    // Else, we are starting array
+    else {
+        m_buffer << "[";
+        m_buffer_empty = true;
+    }
+
+    m_buffer << "{\"mbox\": " << mailbox_id << "}";
+}
+
+void SmsBuffer::print(JNIEnv *env, jobject self, jlong ptr)
+{
+    SmsBuffer *me = reinterpret_cast<SmsBuffer *>(ptr);
+    if (!me) {
+        __android_log_print(ANDROID_LOG_FATAL, LOG_TAG, "It's not a SmsBuffer!");
+        return;
+    }
+
+    me->_print();
+}
+
+void SmsBuffer::_print()
+{
+    __android_log_print(ANDROID_LOG_INFO, LOG_TAG, "SmsBuffer content: '%s'", m_buffer.str().c_str());
+}

src/main/cpp/smsbuffer.h

@@ -0,0 +1,44 @@
+/**
+ *  Copyright (c) 2017, Loic Blot <loic.blot@unix-experience.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <jni.h>
+#include <sstream>
+#include "macro_helpers.h"
+
+class SmsBuffer
+{
+public:
+    SmsBuffer();
+
+    JNIEXPORT static jlong JNICALL createNativeObject(JNIEnv *env, jobject self);
+    JNIEXPORT static void JNICALL deleteNativeObject(JNIEnv *env, jobject self, jlong ptr);
+
+    JNIEXPORT static void JNICALL push(JNIEnv *env, jobject self, jlong ptr, jint mailbox_id);
+    void _push(int mailbox_id);
+
+    JNIEXPORT static void JNICALL print(JNIEnv *env, jobject self, jlong ptr);
+    void _print();
+
+    DECL_JNICLASSATTRS
+
+private:
+    void reset_buffer();
+    std::stringstream m_buffer;
+    bool m_buffer_empty{true};
+};

src/main/java/fr/unix_experience/owncloud_sms/activities/OCSMSSettingsActivity.java

@@ -1,7 +1,7 @@
 package fr.unix_experience.owncloud_sms.activities;
 
 /*
- *  Copyright (c) 2014-2015, Loic Blot <loic.blot@unix-experience.fr>
+ *  Copyright (c) 2014-2017, Loic Blot <loic.blot@unix-experience.fr>
  *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU Affero General Public License as

src/main/java/fr/unix_experience/owncloud_sms/engine/AndroidSmsFetcher.java

@@ -26,6 +26,7 @@ import org.json.JSONException;
 import org.json.JSONObject;
 
 import fr.unix_experience.owncloud_sms.enums.MailboxID;
+import fr.unix_experience.owncloud_sms.jni.SmsBuffer;
 import fr.unix_experience.owncloud_sms.providers.SmsDataProvider;
 
 public class AndroidSmsFetcher {
@@ -56,6 +57,9 @@ public class AndroidSmsFetcher {
 				// Mailbox ID is required by server
 				entry.put("mbox", mbID.ordinal());
 				result.put(entry);
+				SmsBuffer buf = new SmsBuffer();
+				buf.push(mbID.ordinal());
+				buf.print();
 
 			} catch (JSONException e) {
 				Log.e(AndroidSmsFetcher.TAG, "JSON Exception when reading SMS Mailbox", e);

src/main/java/fr/unix_experience/owncloud_sms/engine/OCHttpClient.java

@@ -27,24 +27,32 @@ import org.apache.commons.httpclient.HttpClient;
 import org.apache.commons.httpclient.HttpMethod;
 import org.apache.commons.httpclient.HttpStatus;
 import org.apache.commons.httpclient.HttpVersion;
+import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
 import org.apache.commons.httpclient.URI;
 import org.apache.commons.httpclient.URIException;
-import org.apache.commons.httpclient.cookie.CookiePolicy;
-import org.apache.commons.httpclient.params.HttpClientParams;
-import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
 import org.apache.commons.httpclient.contrib.ssl.EasySSLProtocolSocketFactory;
+import org.apache.commons.httpclient.cookie.CookiePolicy;
 import org.apache.commons.httpclient.methods.GetMethod;
 import org.apache.commons.httpclient.methods.PostMethod;
 import org.apache.commons.httpclient.methods.StringRequestEntity;
+import org.apache.commons.httpclient.params.HttpClientParams;
+import org.apache.commons.httpclient.params.HttpMethodParams;
 import org.apache.commons.httpclient.protocol.Protocol;
 import org.apache.commons.httpclient.protocol.ProtocolSocketFactory;
-import org.apache.commons.httpclient.params.HttpMethodParams;
 
 import java.io.IOException;
 
 import fr.unix_experience.owncloud_sms.providers.AndroidVersionProvider;
 
 public class OCHttpClient extends HttpClient {
+	static {
+		System.loadLibrary("nativesms");
+	}
+
+	public static native String getAllSmsIdsCall();
+	public static native String getLastMsgTimestamp();
+	public static native String getPushRoute();
+	public static native String getVersionCall();
 
 	private static final String TAG = OCHttpClient.class.getCanonicalName();
 	private static final String PARAM_PROTOCOL_VERSION = "http.protocol.version";
@@ -52,12 +60,6 @@ public class OCHttpClient extends HttpClient {
 	private final String _username;
 	private final String _password;
 
-	// API v1 calls
-	private static final String OC_GET_VERSION = "/index.php/apps/ocsms/get/apiversion?format=json";
-	private static final String OC_GET_ALL_SMS_IDS = "/index.php/apps/ocsms/get/smsidlist?format=json";
-	private static final String OC_GET_LAST_MSG_TIMESTAMP = "/index.php/apps/ocsms/get/lastmsgtime?format=json";
-	private static final String OC_PUSH_ROUTE = "/index.php/apps/ocsms/push?format=json";
-
 	// API v2 calls
 	private static final String OC_V2_GET_PHONELIST = "/index.php/apps/ocsms/api/v2/phones/list?format=json";
 	private static final String OC_V2_GET_MESSAGES ="/index.php/apps/ocsms/api/v2/messages/[START]/[LIMIT]?format=json";
@@ -72,7 +74,7 @@ public class OCHttpClient extends HttpClient {
 		_username = accountName;
 		_password = accountPassword;
 		getParams().setParameter(HttpClientParams.ALLOW_CIRCULAR_REDIRECTS, true);
-		getParams().setParameter(PARAM_PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
+		getParams().setParameter(OCHttpClient.PARAM_PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
 		getParams().setCookiePolicy(CookiePolicy.IGNORE_COOKIES);
 		getParams().setParameter(HttpMethodParams.USER_AGENT,
 				"nextcloud-phonesync (" + new AndroidVersionProvider(context).getVersionCode() + ")");
@@ -84,15 +86,15 @@ public class OCHttpClient extends HttpClient {
 	}
 
 	GetMethod getAllSmsIds() {
-		return get(OCHttpClient.OC_GET_ALL_SMS_IDS);
+		return get(OCHttpClient.getAllSmsIdsCall());
 	}
 
 	public GetMethod getVersion() {
-		return get(OCHttpClient.OC_GET_VERSION);
+		return get(OCHttpClient.getVersionCall());
 	}
 
 	PostMethod pushSms(StringRequestEntity ent) {
-		PostMethod post = new PostMethod(_serverURI.toString() + OCHttpClient.OC_PUSH_ROUTE);
+		PostMethod post = new PostMethod(_serverURI.toString() + OCHttpClient.getPushRoute());
 		post.setRequestEntity(ent);
 		return post;
 	}
@@ -109,24 +111,24 @@ public class OCHttpClient extends HttpClient {
 	private int followRedirections(HttpMethod httpMethod) throws IOException {
 		int redirectionsCount = 0;
 		int status = httpMethod.getStatusCode();
-		while (redirectionsCount < 3 &&
-				(status == HttpStatus.SC_MOVED_PERMANENTLY ||
-						status == HttpStatus.SC_MOVED_TEMPORARILY ||
-						status == HttpStatus.SC_TEMPORARY_REDIRECT)
+		while ((redirectionsCount < 3) &&
+				((status == HttpStatus.SC_MOVED_PERMANENTLY) ||
+						(status == HttpStatus.SC_MOVED_TEMPORARILY) ||
+						(status == HttpStatus.SC_TEMPORARY_REDIRECT))
 				) {
 			Header location = httpMethod.getResponseHeader("Location");
 			if (location == null) {
 				location = httpMethod.getResponseHeader("location");
 			}
 			if (location == null) {
-				Log.e(TAG, "No valid location header found when redirecting.");
+				Log.e(OCHttpClient.TAG, "No valid location header found when redirecting.");
 				return 500;
 			}
 
 			try {
 				httpMethod.setURI(new URI(location.getValue()));
 			} catch (URIException e) {
-				Log.e(TAG, "Invalid URI in 302 FOUND response");
+				Log.e(OCHttpClient.TAG, "Invalid URI in 302 FOUND response");
 				return 500;
 			}
 
@@ -134,10 +136,10 @@ public class OCHttpClient extends HttpClient {
 			redirectionsCount++;
 		}
 
-		if (redirectionsCount >= 3 && status == HttpStatus.SC_MOVED_PERMANENTLY ||
-				status == HttpStatus.SC_MOVED_TEMPORARILY ||
-				status == HttpStatus.SC_TEMPORARY_REDIRECT) {
-			Log.e(TAG, "Too many redirection done. Aborting, please ensure your server is " +
+		if (((redirectionsCount >= 3) && (status == HttpStatus.SC_MOVED_PERMANENTLY)) ||
+				(status == HttpStatus.SC_MOVED_TEMPORARILY) ||
+				(status == HttpStatus.SC_TEMPORARY_REDIRECT)) {
+			Log.e(OCHttpClient.TAG, "Too many redirection done. Aborting, please ensure your server is " +
 					"correctly configured");
 			return 400;
 		}

src/main/java/fr/unix_experience/owncloud_sms/jni/SmsBuffer.java

@@ -0,0 +1,49 @@
+package fr.unix_experience.owncloud_sms.jni;
+
+/**
+ *  Copyright (c) 2014-2017, Loic Blot <loic.blot@unix-experience.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+public class SmsBuffer {
+	static {
+		System.loadLibrary("nativesms");
+	}
+
+	private long mHandle;
+
+	public SmsBuffer() {
+		mHandle = SmsBuffer.createNativeObject();
+	}
+
+	protected void finalize() throws Throwable {
+		SmsBuffer.deleteNativeObject(mHandle);
+		mHandle = 0;
+		super.finalize();
+	}
+
+	private static native long createNativeObject();
+	private static native void deleteNativeObject(long handle);
+
+	public static native void push(long handle, int mbid);
+	public void push(int mbid) {
+		SmsBuffer.push(mHandle, mbid);
+	}
+
+	public static native void print(long handle);
+	public void print() {
+		SmsBuffer.print(mHandle);
+	}
+}

src/main/java/fr/unix_experience/owncloud_sms/notifications/OCSMSNotificationUI.java

@@ -1,5 +1,22 @@
 package fr.unix_experience.owncloud_sms.notifications;
 
+/*
+ *  Copyright (c) 2014-2017, Loic Blot <loic.blot@unix-experience.fr>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 import android.annotation.TargetApi;
 import android.app.Notification;
 import android.app.NotificationManager;