Android dev
toolbox II
AVGeeks, 2016

Shem Magnezi
@shemag8 | shem8.wordpress.com

Part 1 Libraries

Part 2 Tools

Why use external tools?
▣ Same as libraries-
don't reinvent the
wheel.

Why not?
▣ Proprietary solutions
(Outsource them,
Everything.me style!)

Systrace
Collects system and application process execution data and generates detailed, interactive reports from devices
http://developer.android.com/tools/performance/systrace/index.html

Allocation tracking
Monitor where objects are being allocated when you perform certain actions
http://developer.android.com/tools/studio/index.html#alloc-tracker

Trace view
Traceview can help you debug your application and profile its performance.
http://developer.android.com/tools/debugging/debugging-tracing.html

Hierarchy Viewer
Visualizes your app's view hierarchy and profiles the relative rendering speed for each view.
http://developer.android.com/tools/performance/hierarchy-viewer/index.html

Developer options
Realtime on device debugging.
http://developer.android.com/tools/device.html

Hugo
Annotation-triggered method call logging for your debug builds.
@DebugLog
public String getName(String first, String last) {
SystemClock.sleep(15); // Don't ever really do this!
return first + " " + last;
}
https://github.com/JakeWharton/hugo
V/Example: ⇢ getName(first="Jake", last="Wharton")
V/Example: ⇠ getName [16ms] = "Jake Wharton"

Leak Canary
A memory leak detection library for Android and Java.
public class ExampleApplication extends Application {
@Override public void onCreate() {
super.onCreate();
LeakCanary.install(this);
}
}
https://github.com/square/leakcanary

Phone Home
Standalone library that sends logs from remote Android devices to a central server for debugging.
PhoneHomeConfig.getInstance()
// enable or disable log flushing
.enabled(false)
// wait for this many log events before flushing ...
.batchSize(100)
// ... or until this many seconds have passed between flushes
.flushIntervalSeconds(1800)
// when developing, log all messages to logcat, then flush everything to the sink
.debugLogLevel(android.util.Log.VERBOSE)
// in production, only log INFO messages and above to logcat, then flush everything to the sink
.productionLogLevel(android.util.Log.INFO)
// specify the sink that receives flushed logs. Required if you enable log flushing
.logSink(new PhoneHomeSink() {
public void flushLogs(final List<PhoneHomeLogEvent> logEvents) {
// flush log events to your backend
}
});
https://github.com/nebulabsnyc/PhoneHome

Probe
Android applications performance testing tool.
python console.py --package your.package.name
--activity TheActivityToRunProbeOn --repeat-count x --
timeout y
https://github.com/EverythingMe/probe

Magneto
Magneto allows you to write smart and powerful tests for Android apps.
http://getmagneto.com/

Monkey testing
adb shell monkey -p your.package.name -v 500
http://developer.android.com/tools/help/monkey.html
The Monkey is a program that runs on your emulator or device and generates pseudo-random streams of user
events such as clicks, touches, or gestures, as well as a number of system-level events. You can use the
Monkey to stress-test applications that you are developing, in a random yet repeatable manner.

Stetho
A debug bridge for Android applications
http://facebook.github.io/stetho/

Espresso
APIs for writing UI tests to simulate user interactions within a single target app.
@Test
public void changeText_sameActivity() {
// Type text and then press the button.
onView(withId(R.id.editTextUserInput))
.perform(typeText(mStringToBetyped), closeSoftKeyboard());
onView(withId(R.id.changeTextBt)).perform(click());
// Check that the text was changed.
onView(withId(R.id.textToBeChanged))
.check(matches(withText(mStringToBetyped)));
}
http://developer.android.com/training/testing/ui-testing/espresso-testing.html

Robolectric
A unit test framework that de-fangs the Android SDK jar so you can test-drive the development of your Android
app
@RunWith(RobolectricTestRunner.class)
public class MyActivityTest {
@Test
public void clickingButton_shouldChangeResultsViewText() throws Exception {
MyActivity activity = Robolectric.setupActivity(MyActivity.class);
Button button = (Button) activity.findViewById(R.id.button);
TextView results = (TextView) activity.findViewById(R.id.results);
button.performClick();
assertThat(results.getText().toString()).isEqualTo("Robolectric Rocks!");
}
}
http://robolectric.org/

Part 3 Resources

Android Arsenal
http://android-arsenal.com/

Droid Toolbox
http://droid-toolbox.com/

MaterialUp
http://www.materialup.com/

Android For Devs
http://www.android4devs.com/

Android library statistics (By Appbrain)
http://www.appbrain.com/stats/libraries

Android Developers Blog
http://android-developers.blogspot.co.il/

Google Developers @Medium
https://medium.com/google-developers

The developer show
https://www.youtube.com/playlist?

Android Weekly
http://androidweekly.net/

Part 4 People

Nick Butcher
Design/Developer Advocate @ Google
@crafty
Chet Hasse
Android animator @ Google
@chethaase
Chiu-Ki Chan
Android developer, public speaker
@chiuki
Romain Guy
Working on awesome stuff at Google
@romainguy
Roman Nurik
Designer @ Google
@romannurik
Kelly Shuster
Android Engineer, Public speaker &
tech diversity advocate.
@kellyshuster

Ian Lake
Developer Advocate @ Google
@ianhlake
Joanna Smith
Developer Advocate @ Google
@dontmesswithjo
Yigit Boyar
UI toolkit team @Android/ Google
@yigitboyar
Lisa Wray
Android @ Genius (prev Google & NYT)
@lisawrayz
Jake Wharton
open source practitioner and contributor, @square
@jakewharton
Colt McAnlis
Developer Advocate @ Google
@duhroach

Thanks!
Any questions?
You can find this presentation at:
shem8.wordpress.com
smagnezi8@gmail.com
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