Moving Android defines to QGCCommon.pri

Added a preliminary android build environment file with some basic instructions. This is for Mac OS, easily modifiable for Linux but I wouldn't know where to begin getting this to run on Windows.

QGCApplication.pro

@@ -38,7 +38,7 @@ message(BASEDIR $$BASEDIR DESTDIR $$DESTDIR TARGET $$TARGET)
 LIBS += -L$${LOCATION_PLUGIN_DESTDIR}
 LIBS += -l$${LOCATION_PLUGIN_NAME}
 
-LinuxBuild|MacBuild {
+LinuxBuild|MacBuild|AndoidBuild {
     PRE_TARGETDEPS += $${LOCATION_PLUGIN_DESTDIR}/lib$${LOCATION_PLUGIN_NAME}.a
 }
 
@@ -81,11 +81,6 @@ QT += testlib
 # OS Specific settings
 #
 
-AndroidBuild {
-    DEFINES += __android__
-    DEFINES += __STDC_LIMIT_MACROS
-}
-
 MacBuild {
     QMAKE_INFO_PLIST = Custom-Info.plist
     ICON = $$BASEDIR/resources/icons/macx.icns

QGCCommon.pri

@@ -115,6 +115,11 @@ DEFINES += _TTY_NOWARN_
 # OS Specific settings
 #
 
+AndroidBuild {
+    DEFINES += __android__
+    DEFINES += __STDC_LIMIT_MACROS
+}
+
 MacBuild {
     CONFIG += x86_64
     CONFIG -= x86

android_environment.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+#----------------------------------------------------------
+# You will need:
+# - Qt 5.4 android_armv7 kit
+# - Android SDK
+# - Androig NDK
+# - Current Java
+# - ant
+#----------------------------------------------------------
+# Update with correct location for these
+export ANDROID_HOME=~/Library/Android/sdk
+export ANDROID_SDK_ROOT=~/Library/Android/sdk
+export ANDROID_NDK_ROOT=~/Library/Android/ndk
+export ANDROID_NDK_HOST=darwin-x86_64
+export ANDROID_NDK_PLATFORM=/android-9
+export ANDROID_NDK_TOOLCHAIN_PREFIX=arm-linux-androideabi
+export ANDROID_NDK_TOOLCHAIN_VERSION=4.9
+export ANDROID_NDK_TOOLS_PREFIX=arm-linux-androideabi
+#----------------------------------------------------------
+# To build it, run (replacing the path with where you have Qt installed)
+#
+# For a shadow build: (strongly recomended)
+#
+# >source android_environment.sh
+# cd ../
+# mkdir android_build
+# cd android_build
+# >~/local/Qt/5.4/android_armv7/bin/qmake -r -spec android-g++ CONFIG+=debug ../qgroundcontrol/qgroundcontrol.pro
+# >make -j24
+# >~/local/Qt/5.4/android_armv7/bin/androiddeployqt --input ./android-libqgroundcontrol.so-deployment-settings.json --output ./android-build --deployment bundled --android-platform android-22 --jdk /System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home --verbose --ant /opt/local/bin/ant
+#
+# For an in place build (not recomended)
+#
+# >source android_environment.sh
+# >~/local/Qt/5.4/android_armv7/bin/qmake -r -spec android-g++ CONFIG+=debug qgroundcontrol.pro
+# >make -j24
+# >~/local/Qt/5.4/android_armv7/bin/androiddeployqt --input ./android-libqgroundcontrol.so-deployment-settings.json --output ./android-build --deployment bundled --android-platform android-22 --jdk /System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home --verbose --ant /opt/local/bin/ant