An exploration into how to use ProGuard for Android obfuscation

http://stackoverflow.com/questions/6542631/android-obfuscate-app-using-proguard-keeps-obfuscating-library-jars-or-is-it

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Tasks for learning today: Android GUI, Graphics, Rendering etc

What is Linear Layout:

http://developer.android.com/resources/tutorials/views/hello-linearlayout.html

What is added advantage of GLSurfaceView over ImageView:

http://developer.android.com/resources/articles/glsurfaceview.html

How to layout using Layout (XML rules):

http://developer.android.com/resources/articles/layout-tricks-efficiency.html

http://developer.android.com/resources/articles/layout-tricks-stubs.html

http://developer.android.com/resources/articles/layout-tricks-merge.html

What is the difference between Canvas and SurfaceView?

http://developer.android.com/reference/android/view/SurfaceView.html

http://developer.android.com/reference/android/graphics/Canvas.html

How to blur an image:

http://stackoverflow.com/questions/6743969/blur-a-image-at-android

http://stackoverflow.com/questions/7115790/alpha-channel-blur

http://stackoverflow.com/questions/8997109/making-linear-layout-translucent-and-blurry/8997964#8997964

my-kid-livewallpaper – Rotating names of my children as my live wallpaper

https://code.google.com/p/my-kid-livewallpaper/

How to compile the Android NDK examples using command line tools

Complete information is from http://developer.android.com/guide/developing/projects/projects-cmdline.html, here is summarized just the bare minimum (but entirely self-sufficient) to get everything compiled, if you are lazy to read the more complete document.

Necessary tools needed prior to compilation:

1. “ant” (http://www.androidengineer.com/2010/06/using-ant-to-automate-building-android.html)

2. Android SDK (http://developer.android.com/sdk/index.html)

3. Android NDK (http://developer.android.com/sdk/ndk/index.html)

And the steps are as follows:

a. Due to the “awk” utility as provided by Android NDK is a 64-bit binary, it is necessary to first rename or delete it first (http://stackoverflow.com/questions/8116113/problems-with-android-ndk-7-and-awk).

b. Then traverse to the NDK’s samples directory, and further cd to any of the samples.

c. Then issue “../../ndk-build” to execute the ndk-build as provided by Android NDK.

d. Then issue the “android update” command (here my Android SDK is installed in the /opt directory):

/opt/android-sdk-linux/tools/android update project –path . –target android-10

The target to choose should match the Android version of the your phone: http://developer.android.com/guide/appendix/api-levels.html

For example, my Sony Ericsson Arc S is Android 2.3.4, so the target is “android-10” as above.

e. Next compile a debug version (you can compile a release version too, but that will require you to sign the application. (Please refer to http://developer.android.com/guide/publishing/app-signing.html for more info).

ant debug

f. Then after connecting the phone to the computer via USB, issue the following command to install the debug apk:

/opt/android-sdk-linux/platform-tools/adb install -r bin/xxxxxxx-debug.apk

where bin/xxxxxxx-debug.apk is the name of the apk generated in the “bin” subdirectory.

The full verbose output as follow:

../../ndk-build
+ dirname ../../ndk-build
+ PROGDIR=../..
+ cd ../..
+ pwd
+ PROGDIR=/opt/android-ndk-r7
+ [ -n /opt/android-ndk-r7/prebuilt/linux-x86/bin/make ]
+ which /opt/android-ndk-r7/prebuilt/linux-x86/bin/make
+ ABS_GNUMAKE=/opt/android-ndk-r7/prebuilt/linux-x86/bin/make
+ [ 0 != 0 ]
+ GNUMAKE=/opt/android-ndk-r7/prebuilt/linux-x86/bin/make
+ [ = cygwin ]
+ /opt/android-ndk-r7/prebuilt/linux-x86/bin/make -f /opt/android-ndk-r7/build/core/build-local.mk
Compile thumb : sanangeles <= importgl.c
Compile thumb : sanangeles <= demo.c
Compile thumb : sanangeles libs/armeabi/libsanangeles.so

+ /opt/android-sdk-linux/tools/android update project –path . –target android-10
Updated project.properties
Updated local.properties
Updated file ./proguard.cfg
+ ant debug
Buildfile: /opt/android-ndk-r7/samples/san-angeles/build.xml

-set-mode-check:

-set-debug-files:

-set-debug-mode:

-debug-obfuscation-check:

-setup:
[echo] Gathering info for DemoActivity…
[setup] Android SDK Tools Revision 16
[setup] Project Target: Android 2.3.3
[setup] API level: 10
[setup]
[setup] ——————
[setup] Resolving library dependencies:
[setup] No library dependencies.
[setup]
[setup] ——————
[setup]
[setup] WARNING: Attribute minSdkVersion in AndroidManifest.xml (4) is lower than the project target API level (10)

-build-setup:
[echo] Creating output directories if needed…

-pre-build:

-code-gen:
[echo] ———-
[echo] Handling aidl files…
[aidl] No AIDL files to compile.
[echo] ———-
[echo] Handling RenderScript files…
[renderscript] No RenderScript files to compile.
[echo] ———-
[echo] Handling Resources…
[aapt] No changed resources. R.java and Manifest.java untouched.

-pre-compile:

-compile:

-post-compile:

-obfuscate:

-dex:
[dex] No new compiled code. No need to convert bytecode to dalvik format.

-crunch:
[crunch] Crunching PNG Files in source dir: /opt/android-ndk-r7/samples/san-angeles/res
[crunch] To destination dir: /opt/android-ndk-r7/samples/san-angeles/bin/res
[crunch] Crunched 0 PNG files to update cache

-package-resources:
[aapt] No changed resources or assets. DemoActivity.ap_ remains untouched

-package:
[apkbuilder] No changes. No need to create apk.

-do-debug:
[zipalign] No changes. No need to run zip-align on the apk.
[echo] Debug Package: /opt/android-ndk-r7/samples/san-angeles/bin/DemoActivity-debug.apk

debug:
[propertyfile] Updating property file: /opt/android-ndk-r7/samples/san-angeles/bin/build.prop
[propertyfile] Updating property file: /opt/android-ndk-r7/samples/san-angeles/bin/build.prop
[propertyfile] Updating property file: /opt/android-ndk-r7/samples/san-angeles/bin/build.prop
[propertyfile] Updating property file: /opt/android-ndk-r7/samples/san-angeles/bin/build.prop

BUILD SUCCESSFUL
Total time: 1 second
+ /opt/android-sdk-linux/platform-tools/adb install -r bin/DemoActivity-debug.apk
453 KB/s (19858 bytes in 0.042s)
pkg: /data/local/tmp/DemoActivity-debug.apk
Success

Where to get ramdisk, kernel source, Android OS source, and general utilities like blktrace for Xperia Arc S (Or any Xperia series from Sony Ericsson)?

https://github.com/DooMLoRD/Xperia-2011-Official-Ramdisks/tree/master/ARC-S http://forum.xda-developers.com/showthread.php?t=1312692 This is one place to get all the kernel source and ramdisk image, in addition to that from Sony Ericsson: http://developer.sonyericsson.com/wp/2011/05/06/how-to-build-a-linux-kernel/ (where I can find kernel source, Android source, and many general utilities like blktrace, but not ramdisk?)