Why Are Android Apps So Crash-Prone?

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WHY ARE ANDROID APPS SO CRASH-PRONE?

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JAMES SMITH loopj loopj

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android-async-http http://loopj.com/android-async-http

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CONGRATS ON LAUNCHING! …NOW WHAT?

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> 400,000 APPS IN THE PLAY STORE HAVE NEVER BEEN DOWNLOADED

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< 0.1% OF APPS HAVE 50,000 OR MORE DOWNLOADS

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CRASHES MATTER

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YOUR APP WILL LIVE OR DIE BASED ON ITS QUALITY — CUSTOMERS HAVE A CHOICE

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80 - 90% OF APPS ARE USED ONCE THEN DELETED

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84% OF USERS ABANDON AFTER TWO CRASHES

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WHY ARE ANDROID APPS SO CRASHY?

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THE CLIENT-SIDE IS THE WILD WEST

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1. FRAGMENTED HARDWARE 2. ROOTED PHONES 3. MULTIPLE ANDROID VERSIONS 4. VENDOR MODIFICATIONS 5. MULTIPLE APP VERSIONS LIVE 6. OUT OF MEMORY ERRORS

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1. FRAGMENTED HARDWARE

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https://developer.android.com/guide/topics/ manifest/uses-feature-element.html#hw-features DETECT FEATURES PRE-DOWNLOAD

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DETECT FEATURES AT RUNTIME import android.content.pm.PackageManager; PackageManager pm = context.getPackageManager(); if (pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)) { // Use the camera }

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2. ROOTED PHONES

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DETECT ROOTED DEVICES https://blog.netspi.com/android- root-detection-techniques/

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3. MULTIPLE ANDROID VERSIONS

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TRACK ANDROID PENETRATION https://developer.android.com/about/dashboards/index.html

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FOLLOW GOOGLE BEST-PRACTICES https://developer.android.com/training/ basics/supporting-devices/platforms.html ...

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4. VENDOR MODIFICATIONS

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¯\_(ツ)_/¯

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5. MULTIPLE APP VERSIONS LIVE

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VERSION YOUR APIS

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6. OUT OF MEMORY ERRORS

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java.lang.OutOfMemoryError at android.graphics.Bitmap.nativeCreate(Bitmap.java:-2) at android.graphics.Bitmap.createBitmap(Bitmap.java:689) at com.squareup.ui.SignView.createSignatureBitmap(SignView.java:121)

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USE LEAK CANARY https://github.com/square/leakcanary

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YOU AREN’T ALONE

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AVERAGE CRASH RATE BETWEEN 4% - 7%

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CHECK OUT BUGSNAG TO HELP YOU FIND + FIX THESE CRASHES!

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THANK YOU!

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QUESTIONS? @loopj • come and say hi at our booth - we’ll give you 2 months free • https://speakerdeck.com/loopj/