THE 2016 ANDROID DEVELOPER TOOLBOX - GAUTIER MECHLING

Whether your native Android app is a pet project or has millions of users, you probably need the right tools, during the development, to help you modify persisted data in real time, simulate an slow/unstable HTTP(s) connection, detect bugs as fast as possible, or create mock servers to anticipate the development of a feature. We'll make a demonstration of all the tools we use, in 2016, to write maintainable code and improve our productivity.

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1. #mobilization2016 THE 2016 ANDROID DEVELOPER TOOLBOX
2. @Nilhcem
3. #mobilization2016
4. THE 2016 ANDROID DEVELOPER TOOLBOX
6. "Use the right tools for the right job"
9. (with the Android Plugin for Gradle)
10. BUILD VARIANTS
11. U+2020 https://github.com/JakeWharton/u2020
12. DEBUG SCREEN Example from Google iosched
13. INTERNAL SETTINGS APP Similar to U+2020 Sample app Display build / device information Change endpoint (restart process with ) Show logs ( ) Allow easy bug report capturing ( ) Enable/Disable Takt / Stetho / Scalpel / Madge... JakeWharton/ProcessPhoenix pedrovgs/Lynx mattprecious/telescope
14. MOBILIZATION 2016 APPLICATION https://github.com/Nilhcem/mobilization-2016
15. MEASURING TOOLS
16. ANDROID STUDIO (Android Monitor tab)
18. DETECT MEMORY LEAKS
20. LEAK CANARY https://github.com/square/leakcanary
21. FRAME RATE build.gradle: MyApplication.java: https://github.com/wasabeef/Takt compile 'jp.wasabeef:takt:1.0.3' public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); Takt.stock(this).play(); } }
22. HUGO https://github.com/JakeWharton/hugo Prefix classes/methods with: @DebugLog Result: MobilizationApp V ⇢ onCreate() V ⇢ initGraph() V ⇠ initGraph [13ms] V ⇢ initLogger() V ⇠ initLogger [1ms] V ⇠ onCreate [73ms]
23. PIDCAT https://github.com/JakeWharton/pidcat $ pidcat com.nilhcem.mobilization
24. ANDROIDDEVMETRICS build.gradle: MyApplication.java: https://github.com/frogermcs/AndroidDevMetrics apply plugin: 'com.frogermcs.androiddevmetrics' public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); AndroidDevMetrics.initWith(this); } }
25. CODE STATIC ANALYSIS TOOLS Lint Error Prone (Google) Infer (Facebook)
29. SONARQUBE Dockerfile: FROM java:8 MAINTAINER Nilhcem RUN DEBIAN_FRONTEND=noninteractive apt update RUN DEBIAN_FRONTEND=noninteractive apt install -y wget unzip RUN wget -q https://sonarsource.bintray.com/Distribution/sonarqube/sonarqube-6.1.zip RUN unzip -qq sonarqube-6.1.zip -d /opt/ RUN rm sonarqube-6.1.zip EXPOSE 9000 CMD ["/opt/sonarqube-6.1/bin/linux-x86-64/sonar.sh", "console"] Then launch: $ docker build -t nilhcem/sonarqube . $ docker run -p 9000:9000 -d nilhcem/sonarqube
30. SONARQUBE GRADLE CONFIGURATION build.gradle: apply plugin: 'org.sonarqube' sonarqube { properties { def appProject = project(':app') def appProjectBuildDir = appProject.buildDir property 'sonar.projectKey', 'mobilization' property 'sonar.projectName', 'Mobilization 2016' property 'sonar.projectVersion', appProject.android.defaultConfig.versionName property 'sonar.host.url', 'http://localhost:9000' property 'sonar.sources', 'src' property 'sonar.sourceEncoding', 'UTF-8' property 'sonar.java.binaries', 'build/intermediates/classes/production/debug' property 'sonar.java.test.binaries', 'build/intermediates/classes/test/production/debug' property 'sonar.exclusions', 'src/test/java/**' property 'sonar.core.codeCoveragePlugin', 'jacoco' property 'sonar.jacoco.reportPath', "$appProjectBuildDir/jacoco/testProductionDebugUnitTest.exec" property 'sonar.junit.reportsPath', "$appProjectBuildDir/test-results/testProductionDebugUnitTest/productionDebug" } } Then launch: ./gradlew :app:assembleProductionDebug :app:testProductionDebugUnitTest :app:sonarqube
33. TESTING TOOLS
34. MOCK SERVER
35. NODEJS + EXPRESS /* Setup */ var fs = require('fs'); var express = require('express'); var app = express(); app.set('port', process.env.PORT || 8080); var port = app.get('port'); /* Speakers list */ app.get('/speakers', function(req, res) { res.type('application/json; charset=utf8'); res.status(200).send(fs.readFileSync('data/speakers.json', 'utf8')); }); /* Other web services */ // ... /* Starting the server */ app.listen(port, function () { console.log('Express server listening on port ' + port); });
36. NODEJS + EXPRESS Slow service sleep(2000); function sleep(durationMillis) { var now = new Date().getTime(); while (new Date().getTime() < now + durationMillis) { // do nothing } } // Please do not take pictures of this slide, // This is not something I am proud of
37. EXAMPLE Then, go to: https://github.com/Nilhcem/mobilization-2016 /tree/master/mockserver $ npm install $ npm start http://localhost:8990/
38. HOSTS EDITOR https://play.google.com/store/apps/details?id=com.nilhcem.hostseditor
39. HTTP DEBUGGING
40. HTTP DEBUGGING mitmproxy Fiddler Charles proxy
41. CHARLES PROXY Simulate a slow connection Repeat queries Check the responses Add some breakpoints to: Cancel an HTTP(s) call Edit a request Edit a response
42. ANDROID STATE RESTORING
43. DON'T KEEP ACTIVITIES
44. FILL RAM https://play.google.com/store/apps/details?id=com.tspoon.androidtoolbelt
45. ANDROID DEVICE MONITOR - STOP PROCESS
46. ANALYZING TOOLS
47. DEVELOPER OPTIONS
50. UIAUTOMATORVIEWER
51. ANIMATIONS Developer options -> Animation scale
52. ANIMATIONS Make a screencast (API 19+): VLC : $ adb shell screenrecord /sdcard/demo.mp4 $ adb pull /sdcard/demo.mp4 Press the keyboard 'E' key to see frames one by one
53. APKTOOL + DEX2JAR + JD-GUI http://ibotpeaches.github.io/Apktool https://github.com/pxb1988/dex2jar http://jd.benow.ca
54. JADX https://github.com/skylot/jadx
55. ANDROID STUDIO (Build > Analyze APK)
56. STETHO
57. STETHO - UI
58. STETHO - NETWORK
59. STETHO DUMPAPP
60. STETHO - DUMPAPP
61. SOME MORE DUMPAPP EXAMPLES $ dumpapp accessToken invalidate $ dumpapp accessToken show fce1235425dcdeadbeef8cafebabe42 $ dumpapp clipboard get Hello $ dumpapp clipboard set "Text to copy" $ dumpapp onTrimMemory $ dumpapp openIntent scheme://open/speaker/3 $ dumpapp gcmToken uHyMKnEQ:APA91bEHZ6afFLQQMzKgSDjp5y_0397usitPqj_Bp02 $ dumpapp geolocData Location[fused 22.5430883,114.1043205 acc=21 et=+21m5s492ms] $ dumpapp runningServices com.example.LocationService
62. STETHO - CUSTOM PLUGIN http://code.tutsplus.com/tutorials/debugging-android-apps-with-facebooks-stetho--cms-24205 class AppDumperPlugin implements DumperPlugin { @Override public String getName() { return "my_plugin_name"; } @Override public void dump(DumperContext dumpContext) throws DumpException { PrintStream writer = dumperContext.getStdout(); String commandName = (args.isEmpty()) ? "" : args.remove(0); if (commandName.equals("test")) { out.println("Hello, World!"); } } }
63. STETHO - CUSTOM PLUGIN
64. STETHO - DUMPAPP (EXAMPLE) (ActivityProvider in a dependency graph in debug) @Singleton public class ActivityProvider implements Application.ActivityLifecycleCallbacks { private Activity currentActivity; @Inject public ActivityProvider(Application app) { app.registerActivityLifecycleCallbacks(this); } public Activity getCurrentActivity() { return currentActivity; } @Override public void onActivityResumed(Activity activity) { currentActivity = activity; } @Override public void onActivityPaused(Activity activity) { currentActivity = null; } }
65. STETHO - DUMPAPP (EXAMPLE) AppDumperPlugin.java private void displayCurrentSessionData(PrintStream writer) { Activity activity = activityProvider.getCurrentActivity(); if (activity instanceof SessionDetailsActivity) { try { // Use reflection to access private "session" field Field field = SessionDetailsActivity.class.getDeclaredField("session"); field.setAccessible(true); Session session = (Session) field.get(activity); writer.println(new GsonBuilder().setPrettyPrinting().create().toJson(session)); } catch (Exception e) { writer.println(e.getMessage()); } } }
66. $#*!, I FORGOT THESE TOOLS!
67. ADB + SHELL # Open a deep linking intent adb shell am start -a android.intent.action.VIEW -d "scheme://app/deep/linking" # List running services adb shell dumpsys activity services # Get the path of an install application adb shell pm path app.package.name # Clear app data adb shell pm clean app.package.name # Take a screenshot adb shell screencap -p | perl -pe '\''s/\x0D\x0A/\x0A/g'\'' > screen.png # Paste text from your computer clipboard to your android device pbpaste | sed "s/%/%%/g" | sed "s/ /\%\s/g" | xargs adb shell input text
68. POSTMAN https://www.getpostman.com/
69. LOCKITO https://play.google.com/store/apps/details?id=fr.dvilleneuve.lockito
70. ACCESSIBILITY SCANNER https://play.google.com/store/apps/details?id=com.google.android.apps.accessibility.auditor
71. VYSOR http://www.vysor.io
72. AS A CONCLUSION...
73. CHOOSE ACCORDING TO YOUR NEEDS AND TASTES
74. THE 2016 ANDROID DEVELOPER TOOLBOX
75. (EXAMPLE OF AN) ANDROID DEVELOPER TOOLBOX
76. https://twitter.com/Nilhcem https://github.com/Nilhcem/mobilization-2016 http://www.slideshare.net/Nilhcem/the-2016-android-developer-toolbox-mobilization MASTER YOUR TOOLS TO BUILD BETTER APPS