use the AOSP to learn android, use the android code to write your own code. Learn new api usages, o view how android works internally, for develop apps that run on your own android distribution.

1. Learning Android with AOSP
Jorge Juan Barroso Carmona
jorge@karumi.com
@flipper83
+JorgeJBarroso
Android expert

2. We embark on every project with a commitment to create something
elegant, enduring and effective. That is our heartbeat.
Our approach is uniquely simple and honest, we are a small
dedicated software studio, delivering outstanding work.
Karumi is the Rock Solid code software development studio.

3. Android Open Source Project

4. +450 projects
40Gb free space
16 Gb RAM
A lot of patience

5. Linux Kernel
Warelocks / Lowmem / Binder / Logger / Ram Console / …
Libraries
Bionic / OpenGL / WebKit …
Native
Daemons
HAL Init / toolbox
Dalvik / Android Runtime / Zygote
System Services
Power Manager / Package Manager / Windows Manager /…
android.*
Stock Android App
Launcher3 / Camera2 / Calculator…
java.*
Apache
Harmony
Your Apps /
Market Apps
App
API
Binder
JNI

6. platform/packages/apps
Samples:
Calculator
Camera2
Dialer
Launcher3

7. Review Manifests
<application
android:icon="@mipmap/ic_launcher_calculator"
android:label="@string/app_name"
android:theme="@style/CalculatorTheme">
<activity
android:name=".Calculator"
android:label="@string/app_name"
android:windowSoftInputMode="stateAlwaysHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
<category
android:name=“android.intent.category.APP_CALCULATOR"/>
</intent-filter>
</activity>
</application>

8. Review Manifests
Contacts/manifest:
android:supportsRtl=“true”
android:taskAffinity=“android.task.contacts"
<activity-alias/>
<data android:mimeType=“…” />
<original-package/>
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9. Review Manifests
Permissions:
normal
dangerous
signature
signatureOrSystem
android.permission.DELETE_PACKAGES:
Allows an application to delete packages. Not for
use by third-party applications.

10. Review Manifests
Permissions:
android:sharedUserId=“android.uid.system"
android:sharedUserId="android.uid.shared"
Apps in the /system folder. System is not mount
for write by default.
cat /proc/mounts
mount -o rw,remount -t ext4 <block-name> /system
Signed with the same Certificate

11. Review Manifests
Fun:
android.intent.category.TEST
android.intent.category.MONKEY
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android.intent.action.DEVICE_INITIALIZATION_WIZARD
intent priority
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12. Review Code
Sample Calculator Reveal:

13. Review Code
Sample Calculator Reveal:
private void reveal(View sourceView, int colorRes,
AnimatorListener listener) {
…
final Animator revealAnimator =
ViewAnimationUtils.createCircularReveal
(revealView,revealCenterX, revealCenterY, 0.0f,
revealRadius);
…
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}
!

14. Review Code
Using the framework:
new ChooseLockSettingsHelper(getActivity(), this)
.launchConfirmationActivity(KEYGUARD_REQUEST,"","");
if (resultCode == Activity.RESULT_OK && data != null) {
String password = data.getStringExtra
(ChooseLockSettingsHelper.EXTRA_KEY_PASSWORD);
}

15. Review Code
/*hide*/ :
smClass = Class.forName(“android.os.ServiceManager");
Method getService = smClass.getMethod("getService",
String.class);
IBinder binder = (IBinder) getService.invoke(null,
“power");
IPowerManager powerStub = IPowerManager.Stub.
asInterface(binder);
powerStub.shutdown(false, true);
provided files('providedLibs/layoutlib.jar')

16. !
Find meI am very social!
jorge@karumi.com
@flipper83
+JorgeJBarroso
Questions?

17. !