Set up cross compile of syncthing to android (arm) and included it in an app.

Syncthing does not actually work yet, probably because paths are different.

.gitignore

@@ -0,0 +1,33 @@
+# built application files
+*.apk
+*.ap_
+
+# files for the dex VM
+*.dex
+
+# Java class files
+*.class
+
+# generated files
+bin/
+gen/
+libs/
+obj/
+
+# Local configuration file (sdk path, etc)
+local.properties
+project.properties
+
+# Eclipse project files
+.settings/
+.classpath
+.project
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# Intellij project files
+*.iml
+*.ipr
+*.iws
+.idea/

AndroidManifest.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+	package="com.nutomic.syncthingandroid"
+	android:versionCode="1"
+	android:versionName="1.0" >
+	<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="15" />
+	<application android:label="@string/app_name" >
+        	<activity
+				android:name="MainActivity" 
+				android:theme="@android:style/Theme.Holo.Light"
+				android:label="@string/app_name" >
+				<intent-filter>
+					<action android:name="android.intent.action.MAIN" />
+					<category android:name="android.intent.category.LAUNCHER" />
+				</intent-filter>
+		</activity>
+ 	</application>
+</manifest> 

README.md

@@ -0,0 +1,9 @@
+## syncthing-android
+
+A port of [syncthing](https://github.com/calmh/syncthing) to Android.
+
+## Building
+
+Setup [goandroid](https://github.com/eliasnaur/goandroid).
+
+To compile, run `./build.sh` (go cross compile) and `ant -f build.xml clean debug install run` (Android package).

build.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -e
+
+mkdir -p libs/armeabi-v7a
+mkdir -p obj/local/armeabi-v7a
+CC="$NDK_ROOT/bin/arm-linux-androideabi-gcc"
+CC=$CC GOOS=linux GOARCH=arm GOARM=7 CGO_ENABLED=1 ../go/bin/go install $GOFLAGS -v -ldflags="-android -shared -extld $CC -extldflags '-march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16'" -tags android github.com/calmh/syncthing
+cp $GOPATH/bin/linux_arm/syncthing libs/armeabi-v7a/libsyncthing.so
+cp $GOPATH/bin/linux_arm/syncthing obj/local/armeabi-v7a/libsyncthing.so

build.xml

@@ -0,0 +1,103 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project name="syncthing" default="help">
+
+    <!-- The local.properties file is created and updated by the 'android' tool.
+         It contains the path to the SDK. It should *NOT* be checked into
+         Version Control Systems. -->
+    <property file="local.properties" />
+
+    <!-- The ant.properties file can be created by you. It is only edited by the
+         'android' tool to add properties to it.
+         This is the place to change some Ant specific build properties.
+         Here are some properties you may want to change/update:
+
+         source.dir
+             The name of the source directory. Default is 'src'.
+         out.dir
+             The name of the output directory. Default is 'bin'.
+
+         For other overridable properties, look at the beginning of the rules
+         files in the SDK, at tools/ant/build.xml
+
+         Properties related to the SDK location or the project target should
+         be updated using the 'android' tool with the 'update' action.
+
+         This file is an integral part of the build system for your
+         application and should be checked into Version Control Systems.
+
+         -->
+    <property file="ant.properties" />
+
+    <!-- if sdk.dir was not set from one of the property file, then
+         get it from the ANDROID_HOME env var.
+         This must be done before we load project.properties since
+         the proguard config can use sdk.dir -->
+    <property environment="env" />
+    <condition property="sdk.dir" value="${env.ANDROID_HOME}">
+        <isset property="env.ANDROID_HOME" />
+    </condition>
+
+    <!-- The project.properties file is created and updated by the 'android'
+         tool, as well as ADT.
+
+         This contains project specific properties such as project target, and library
+         dependencies. Lower level build properties are stored in ant.properties
+         (or in .classpath for Eclipse projects).
+
+         This file is an integral part of the build system for your
+         application and should be checked into Version Control Systems. -->
+    <loadproperties srcFile="project.properties" />
+
+    <!-- quick check on sdk.dir -->
+    <fail
+            message="sdk.dir is missing. Make sure to generate local.properties using 'android update project' or to inject it through the ANDROID_HOME environment variable."
+            unless="sdk.dir"
+    />
+
+    <!--
+        Import per project custom build rules if present at the root of the project.
+        This is the place to put custom intermediary targets such as:
+            -pre-build
+            -pre-compile
+            -post-compile (This is typically used for code obfuscation.
+                           Compiled code location: ${out.classes.absolute.dir}
+                           If this is not done in place, override ${out.dex.input.absolute.dir})
+            -post-package
+            -post-build
+            -pre-clean
+    -->
+    <import file="custom_rules.xml" optional="true" />
+
+    <!-- Import the actual build file.
+
+         To customize existing targets, there are two options:
+         - Customize only one target:
+             - copy/paste the target into this file, *before* the
+               <import> task.
+             - customize it to your needs.
+         - Customize the whole content of build.xml
+             - copy/paste the content of the rules files (minus the top node)
+               into this file, replacing the <import> task.
+             - customize to your needs.
+
+         ***********************
+         ****** IMPORTANT ******
+         ***********************
+         In all cases you must update the value of version-tag below to read 'custom' instead of an integer,
+         in order to avoid having your file be overridden by tools such as "android update project"
+    -->
+    <!-- version-tag: 1 -->
+    <import file="${sdk.dir}/tools/ant/build.xml" />
+	
+    <target name="run">
+        <exec executable="adb">
+            <arg value="shell"/>
+            <arg value="am"/>
+            <arg value="start"/>
+            <arg value="-a"/>
+            <arg value="android.intent.action.MAIN"/>
+            <arg value="-n"/>
+            <arg value="com.nutomic.syncthingandroid/.MainActivity"/>
+        </exec>
+    </target>
+</project>

res/values/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Syncthing</string>
+</resources>

src/com/nutomic/syncthingandroid/MainActivity.java

@@ -0,0 +1,13 @@
+package com.nutomic.syncthingandroid;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+public class MainActivity extends Activity {
+
+    @Override public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+		System.loadLibrary("syncthing");
+	}
+	
+}