This directory contains the Android-specific code for building xscreensaver.

It is preliminary, and very much a work in progress.

If you're messing with this, please let us know!

        dennis@panaceasupplies.com
        jwz@jwz.org


To build:

    Install JDK 7 (http://www.oracle.com/technetwork/java/javase/downloads/)
    Install Android Studio (http://developer.android.com/sdk/)
    Install Android NDK (http://developer.android.com/ndk/downloads)
      Rename or link the "android-ndk-*" directory to "ndk" inside your
      $ANDROID_HOME (the "sdk/" directory that is the parent of
      "build-tools/", etc.)  That is, it should be "sdk/ndk/".

    set $ANDROID_HOME to where your SDK is installed, or
    set "sdk.dir" in project/local.properties.
    On MacOS, the value you want is probably ~/Library/Android/sdk/
    Also set "ndk.dir" in project/local.properties.

    cd android
    make

    If it fails, try a "make clean" and then try make again.
    Make sure you have the needed Android SDK platform versions installed.

    Hopefully an "xscreensaver-debug.apk" file will appear in
    android/project/xscreensaver/build/outputs/apk/.

    Load that onto your device and go to:
      Settings / Display / Wallpaper / Live Wallpapers.

    To launch the emulator:
      $ANDROID_HOME/sdk/tools/emulator -avd Nexus_5_API_21_x86

    To load it into the currently-running emulator:
      $ANDROID_HOME/platform-tools/adb install -r \
        project/xscreensaver/build/outputs/apk/xscreensaver-debug.apk


The files in these subdirectories are source code, more or less:

        project/xscreensaver/*.xml
        project/xscreensaver/src/org/jwz/xscreensaver/
        project/GLWallpaperService/ (a third-party library, unchanged)

These directories are boilerplate for Android apps:

        project/xscreensaver/res/layout/
        project/xscreensaver/res/values/
        project/xscreensaver/res/xml/
        project/xscreensaver/res/drawable-ldpi/
        project/xscreensaver/res/drawable-mdpi/
        project/xscreensaver/res/drawable-hdpi/
        project/xscreensaver/res/drawable/thumbnail.png

These are files that we generate:

        project/xscreensaver/src/org/jwz/xscreensaver/gen/

These too (intermediate build files):

        .gradle/
        gen/
        project/GLWallpaperService/build/
        project/build/
        project/xscreensaver/build/
        project/xscreensaver/libs/
        project/xscreensaver/obj/
        project/xscreensaver/res/xml/

These are files that we *will* generate but don't yet:

        project/xscreensaver/res/drawable/*.png
        XScreenSaverView.c

When adding a new hack, edit:

        project/xscreensaver/jni/Android.mk
        project/xscreensaver/build.gradle
        generate_files.pl