2 This directory contains the Android-specific code for building xscreensaver.
4 It is preliminary, and very much a work in progress.
6 If you're messing with this, please let us know!
8 dennis@panaceasupplies.com
12 To set up your Android development environment:
14 Install JDK 7 (http://www.oracle.com/technetwork/java/javase/downloads/)
15 Install Android Studio (http://developer.android.com/sdk/)
16 Install Android NDK (http://developer.android.com/ndk/downloads)
17 Rename or link the "android-ndk-*" directory to "ndk" inside your
18 $ANDROID_HOME (the "sdk/" directory that is the parent of
19 "build-tools/", etc.) That is, it should be "sdk/ndk/".
21 set $ANDROID_HOME to where your SDK is installed, or
22 set "sdk.dir" in the file local.properties.
23 On MacOS, the value you want is probably ~/Library/Android/sdk/
24 Also set "ndk.dir" in local.properties.
32 Hopefully an "xscreensaver-debug.apk" file will appear in
33 android/xscreensaver/build/outputs/apk/.
35 Load that onto your device and go to:
36 Settings / Display / Daydream
37 or just click on the XScreenSaver icon, which is a shortcut to that.
39 To create and configure an emulator image, use the GUI tool and and
40 give the emulator a name (say, "Nexus_5").
42 $ANDROID_HOME/sdk/tools/android avd
44 E.g.: Nexus 5, Android 5, Intel Atom x86_64, RAM 2048 VM 64,
45 storage 200, use host GPU.
47 Configuration options are in $HOME/.android/avd/*.avd/config.ini
51 $ANDROID_HOME/sdk/tools/emulator -avd Nexus_5
53 Warning! On my system at least, the emulator runs out of memory
54 when trying to display the Daydream page if all of the savers are
55 loaded. This is troubling. You can work around this by editing
56 your *.avd/config.ini and setting vm.heapSize=128; or by editing
57 android/Makefile and paring down the $ANDROID_HACKS list to a
58 smaller subset (60 or so with the default heapSize).
61 To load it into the currently-running emulator or device:
62 $ANDROID_HOME/platform-tools/adb install -r \
63 xscreensaver/build/outputs/apk/xscreensaver-debug.apk
65 Extremely verbose log output, including stack traces:
66 $ANDROID_HOME/platform-tools/adb logcat
68 Non-fatal log output for only this app:
69 $ANDROID_HOME/platform-tools/adb logcat \
70 -s xscreensaver:d AndroidRuntime:d libEGL:d
72 Note that sometimes "logcat" will just sit there forever saying
73 "waiting for device". This is because the emulator is a piece of
74 shit and sometimes decides to just randomly not service connections.
75 If you restart the emulator, and wait minutes for the whole damned
76 thing to boot up again, it will probably work next time. Probably.
81 Boilerplate for the Java version of "make":
86 xscreensaver/*.properties
88 The other half of the Makefile:
92 xscreensaver/src/org/jwz/xscreensaver/*.java
93 xscreensaver/res/layout/*.xml
95 Other relevant source code is in ../jwxyz/ and ../hacks/.
98 xscreensaver/res/drawable-ldpi/
99 xscreensaver/res/drawable-mdpi/
100 xscreensaver/res/drawable/
102 Files that we generate:
105 xscreensaver/AndroidManifest.xml
106 xscreensaver/res/drawable/*.png
107 xscreensaver/res/values/settings.xml
108 xscreensaver/res/values/strings.xml
109 xscreensaver/res/xml/*.xml
110 xscreensaver/src/org/jwz/xscreensaver/gen/*.java
112 Other files generated as a part of the build process:
117 xscreensaver/build/outputs/apk/ -- app appears here
122 xscreensaver/res/drawable/
123 xscreensaver/res/values/
124 xscreensaver/res/xml/
125 xscreensaver/src/org/jwz/xscreensaver/gen/
127 When adding a new hack, edit android/Makefile, then "make clean" and "make".
130 TODO list, and known bugs:
132 - See the top of ../jwxyz/jwxyz-gl.c for a low level TODO list,
133 but here's what's wrong with the savers from a high level view:
135 - Rotation is wonky (on some devices?)
137 - The Android emulator is a piece of shit and crashes all the time,
138 so it's possible that some of these work fine on real devices.
139 I don't actually have an Android device, so I have no idea.
141 - As mentioned above, the Android emulator runs out of memory if
142 more than about 60 of the Daydreams are installed with the default
143 heapSize. Again, I don't know if this is an issue on real devices.
146 - The code that attempts to grab a screen shot before the Daydream begins
149 - When a saver exits abnormally, we catch the exception and attempt to
150 display the error message in a dialog. The catch works, but the dialog
153 antinspect renders incorrectly
154 apple2 text, images into pixmaps doesn't work
156 bsod pixmaps, XCopyArea problems
157 carousel images are corrupted
158 cityflow shading is wrong
159 endgame insanely slow
161 esper images don't load, no text
164 glblur grayscale instead of color
165 halftone XFillArc crash
166 jigglypuff incredibly slow
168 maze lines are not the same thickness (aliased?)
171 pacman images; launches really slowly
173 phosphor text; pixmaps
174 photopile text; images don't display
179 sonar does icmp work?
186 winduprobot dome is not transparent
188 xflame draws only upper left corner