Learn Android with AOSP

Android Open Source Project contains all the code related to the Android SDK and most of the Android system applications. We can learn a lot about Android checking how the system is implemented. We can read the calculator app code to learn about material design, learn about how the Android Manifest works or review how different system activities are launched just reading the ASOP code.

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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 me I am very social! jorge@karumi.com @flipper83 +JorgeJBarroso Questions?