The document introduces a dedicated software studio, Karumi, specializing in Android development using the Android Open Source Project (AOSP). It discusses various aspects of Android architecture, code samples, and manifests, as well as essential permissions and application components. The document highlights the commitment to producing elegant and effective software solutions.

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/>
!
!

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
!
android.intent.action.DEVICE_INITIALIZATION_WIZARD
intent priority
!
!
!

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);
…
!
}
!

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. !