AirPods Pro + Android Low Volume Issue Can Be Solved by Resetting

Resetting AirPods Pro was the quickest fix for the low-volume issue when pairing them with an Android phone.

Amazon Mobile App Distribution Program Registration Method

Registering as a developer on the Amazon Mobile App Distribution Program to publish an Android app on the Amazon Appstore.

Solved Android 10 Tethering Issue

Fixing broken tethering on Android 10 by tweaking the IIJmio APN configuration.

[Android] How to Display Back Button in Action Bar to Return to Previous Activity

Reference links for adding an Up-navigation back button to the Android action bar.

[Android] ActionBarSherlock Jar mismatch! Fix your dependencies error

Fixing duplicate android-support-v4.jar conflicts when importing ActionBarSherlock.

[Android] IllegalStateException: Cannot add header view to list : setAdapter has already been called.

Call addHeaderView / addFooterView before setListAdapter to avoid IllegalStateException in ListFragment.

[Android] How to Center AdMob

Reference link for centering AdMob ads in an Android layout.

[Android][AdMob] Error parsing XML: unbound prefix error

Fix an 'unbound prefix' XML error when adding AdMob to an Android layout by declaring xmlns:ads.

[Android] How to Set Alert Dialog Title

Setting an AlertDialog title with AlertDialog.Builder.setTitle in Android.

How to completely uninstall Android apps for clean reinstallation

Steps to cleanly uninstall and reinstall an Android app, including turning off Google Drive backup.

[Android] Steps to release an app to Google Play

Reference links used when preparing to release an Android app to Google Play.

[Android] App Internationalization Support (English/Japanese localization)

Localizing an Android app between English and Japanese by splitting values/strings.xml and values-ja/strings.xml.

[Android] Application#onTerminate() does not work on actual devices

Application#onTerminate() never fires on production Android devices — a short note with references.

[Android] Application#onCreate is Called Before Activity, Service, and Receiver Objects Are Created

Application#onCreate fires before Activities, Services, and Receivers — placing analytics there can skew session counts.

[Android] RuntimeException on AsyncTask : NullPointerException on doInBackground

Wrap doInBackground in try/catch, return null on failure, and handle it in onPostExecute to stop AsyncTask crashes.

[Android] RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

Fixing the Looper.prepare() crash caused by touching the UI inside AsyncTask#doInBackground — move UI work to onPostExecute.

[Android] Android-Bootstrap - Use Bootstrap and Font Awesome UI Components

Introducing Android-Bootstrap, a library for using Bootstrap-style buttons and Font Awesome icons in Android apps.

[Android] How to Change Package Name

A short memo linking to a reference for changing the package name of an Android app.

[Android] Using Crittercism for Real-time Crash Report Monitoring

Integrating Crittercism real-time crash reporting into an Android app, with permissions, init code, and ProGuard rules.

[Android] Crouton - A Library for Easily Displaying Toast-like Notification Views

Introducing Crouton, an Android library for showing Toast-style notification views easily.

[Android][Eclipse] Cannot build project until build path errors are resolved

Fixing Eclipse's build path error after importing an Android project by ticking Android x.x under Order and Export.

[Android] How to Configure Eclipse (Mac) Emulator to Connect to the Internet

Configuring the Android emulator's DNS in Eclipse on Mac to restore internet connectivity.

[Android] How to Import External Libraries and SDKs

Importing external libraries and SDKs like the Facebook SDK into an Android project in Eclipse.

[Android] Error "The project was not built due to incomplete build path."

Resolving Eclipse's "incomplete build path" error during Android development via Order and Export.

[Android] How to Install APK Files on an Emulator

Installing an APK onto a running Android emulator with the `adb install` command.

[Android] How to Take Screenshots of Emulator via Eclipse

A short memo linking to a reference on taking Android emulator screenshots via Eclipse.

[Android] How to Configure SD Card Usage in Emulator

How to enable SD card usage in the Android emulator by specifying its size from the AVD Manager in Eclipse.

[Android] "ES Task Manager" for Memory Release and Task Termination

Using "ES Task Manager" to kill app tasks per screen and check for crashes or broken navigation on resume.

[Android] Facebook Authentication Error: com.facebook.FacebookOperationCanceledException: remote_app_id does not match stored id

Fixing the Facebook "remote_app_id does not match stored id" error by logging the correct Key Hash from the running Android app.

[Android] Facebook SDK Error: Failure delivering result ResultInfo{who=null, request=64206, result=0, data=null} to activity {com.example/com.facebook.LoginActivity}: java.lang.NullPointerException

The Facebook SDK for Android v3.0 login NullPointerException is a known bug fixed by upgrading to v3.0.1.

How to transfer files to Android 9 devices using Android File Transfer

Switching the Android 9 USB mode to File Transfer and sending files from macOS with Android File Transfer.

[Android] FILL_PARENT is Deprecated, Use MATCH_PARENT Instead (Android 2.2 and Later)

FILL_PARENT is deprecated from Android 2.2; use MATCH_PARENT instead — it's just a rename refactor.

[Android] Calling getWindowManager inside a fragment

Inside a Fragment, get DisplayMetrics via getActivity().getWindowManager() instead of getWindowManager().

[Android] NoSuchMethodError with getActionBar()

To support Android 2.3, use ActionBarSherlock's getSupportActionBar() instead of getActionBar() to avoid NoSuchMethodError.

[Android] Google Analytics Usage Reference Information

Reference links for implementing Google Analytics SDK for Android v2, including official docs and Team EGG translations.

[Android] Points to Check When Google Play Shows 'Your device isn't compatible with this version'

How to fix "Your device isn't compatible with this version" on Google Play by tuning uses-feature settings.

[Android] How to Hide Action Bar

Hide the ActionBar in an Android Activity with a single getActionBar().hide() call.

[Android] How to Test In-App Purchases in Debug Build

Sign the debug APK with the release key and use Google Play alpha or beta tracks to test in-app purchases.

[Android] INSTALL_PARSE_FAILED_NO_CERTIFICATES error

The simplest fix for INSTALL_PARSE_FAILED_NO_CERTIFICATES is to build a signed APK and install that instead.

[Android/iOS] How to test Deep Link and Custom URL Scheme in development environment

Verify Deep Links and Custom URL Schemes locally with SimpleHTTPServer + ngrok, and open them on Android Emulator and iOS Simulator.

[Android] SSH Client App JuiceSSH

Installed JuiceSSH on a Nexus5 for on-call SSH access, importing the private key via email.

[Android] Command to Check the Contents of a Keystore File

A note on inspecting an Android keystore file's aliases and certificate fingerprints with the keytool command.

[Android] How to Call Activities from External Packages

A quick note on launching an Activity from another package with Intent#setClassName.

[Android] Switching debug mode with android:debuggable is deprecated

Setting android:debuggable in AndroidManifest.xml to switch debug mode is deprecated.

[Android] The Minimum API Level (OS Version) That an App Can Run On is Set with android:minSdkVersion

The lowest API level an Android app supports is configured via android:minSdkVersion.

[Android] OAuth2 Authentication Implementation Methods

Reference links for three ways to implement OAuth2 in Android apps: scribe-java, WebView, and AccountManager.

[Android] How to Implement Push Notification Feature Using Parse.com

Reference links for adding Parse.com-backed push notifications to an Android app.

[Android] How to Play Videos in Official YouTube App with Explicit Intent

A working Intent for playing videos in the official YouTube Android app using the vnd.youtube: URI.

[Android] Real-time Crash Report Auto-send Services Summary

A summary of real-time crash-reporting options for Android: Crittercism, BugSense, and ACRA.

[Android] How to remove Google (Gmail) account from device

How to remove a Google (Gmail) account from an Android device via the Settings app.

[Android] How to Remove/Unset Event Listeners

Clear an Android View's OnClickListener by calling setOnClickListener(null).

Android Studio installation for macOS

Installing Android Studio on macOS Mojave and clearing the SDK-license error.

How to set environment variables PATH and JAVA_HOME to use Android Studio's JDK in Terminal

Set PATH and JAVA_HOME to reuse Android Studio's bundled JDK from Terminal on macOS.

[Android] How to Center TextView Text

Center TextView text horizontally with android:gravity="center_horizontal".

[Android] Error Occurs During Twitter Authentication When Time is Not Set Correctly

A wrong device clock can break Android Twitter authentication with a null challenge error.

[Android] Unable to create external cache directory error

The Unable to create external cache directory error was fixed by declaring WRITE_EXTERNAL_STORAGE.

[Android] Unable to find explicit activity class {activity name}; have you declared this activity in your AndroidManifest.xml?

How to resolve the Android 'Unable to find explicit activity class' error by declaring the activity in AndroidManifest.xml.

[Android] Difference between View.INVISIBLE and View.GONE

The difference between View.INVISIBLE and View.GONE in Android, in terms of whether layout space is kept for the hidden view.

[Android] Waiting for Debugger - Application XXX is waiting for the debugger to Attach Error

Restarting Eclipse fixed the Android 'Waiting for Debugger' hang when launching an app in debug mode.

[Eclipse] No projects are found to import

Fixing Eclipse's "No projects are found to import" error by adding a .project file.

Changing Video Recording Date with ExifTool App on Android

Fixing an Android trimmed video's recording date using the ExifTool app.

How to find Android apk files using the find command

A quick find one-liner to locate Android .apk files built with gradlew.

How to Add Firebase to Flutter App

Adding Firebase to a Flutter app on Android and iOS, with the gotchas I ran into.

Flutter Sample Code for Implementing Camera Functionality Within App

Sample Flutter code that implements in-app camera functionality using the camera and path_provider packages.

Flutter Introduction | App Creation ~ Running on Android Emulator and iOS Simulator

A Flutter getting-started walkthrough — install, fix flutter doctor issues, and run on Android Emulator and iOS Simulator.

Google Analytics SDK for Android v2 EasyTracker Parameters

Reference links for EasyTracker parameters in Google Analytics SDK for Android v2.

I Purchased Google Pixel 7

A record of upgrading from Pixel 6 to Pixel 7 and migrating my data.

Purchased Google Pixel 8 Pro

A record of upgrading from Pixel 7 to Pixel 8 Pro and migrating my data.

[Android] About 'Marketing Opt-out' in Google Play Developer Console

What the 'Marketing Opt-out' option in the Google Play Developer Console means and when to use it.

Gradle Introduction Articles Summary

A link roundup of Gradle introduction articles referenced when starting Android development.

JavaScript Sample Code for URL Scheme Launch on Android and iPhone with Store Redirect if App Not Downloaded

JS sample that launches an app via URL scheme, redirecting to the app store on failure.

[Android] How to fix garbled characters in keytool command

Fix garbled keytool output on Mac by setting `_JAVA_OPTIONS` to UTF-8 file encoding.

[Android] How to Display 'Developer Options' and Enable 'USB Debugging' on Nexus 7

Tap the Build number seven times to reveal Developer Options on the Nexus 7 and enable USB Debugging.

[Android] How to Fix Nexus7 When It Won't Start

Bringing a fully discharged Nexus 7 back to life with a long power-button press or the power + volume-key combo.

How to Use OpenVPN Connect App [Android, iOS]

How to import client.ovpn into OpenVPN Connect and make a first VPN connection on Android and iOS.

[Android] SP mode mail's received/sent email font size is too large or too small

Fixing mismatched SP mode mail font sizes on Android by updating to the Docomo mail app.

[Titanium Mobile] How to Disable Splash Screen

How to hide the Titanium Mobile splash screen — impossible on iOS, doable on Android by editing theme.xml.

Titanium Mobile Introduction (Titanium Studio Installation/Configuration ~ Running on iPhone/Android Simulator)

Setting up Titanium Studio and getting a first project running on iPhone and Android simulators.

[Ionic] How to Clear Cache When Building for Android/iOS

How I recovered from Ionic + Cordova build failures by clearing the cache via platform remove / add.