Andrew Jack AndrewJack

Android Cheat Sheet

Developer tips

Record a video of your app

Developer options -> Check show touches
adb shell screenrecord /sdcard/video.mp4
adb pull /sdcard/video.mp4

Send uncaught Exceptions from Android Wear to Android

This is a short Gist showing how I transmit any uncaught exceptions happening in the Wearable part of my App to the connected Smartphone/Tablet. This is necessary because Android Wear devices are not directly connected to the Internet themselves.

##Wear

WearApp.java
AndroidManifest.xml
ErrorService.java

RecyclerView item onClick

RecyclerView does not have an OnItemClickListener like it's predecessor, ListView. However, detecting item clicks is pretty simple.

Set an OnClickListener in your ViewHolder creation:

private class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>  {

    public static class ViewHolder extends RecyclerView.ViewHolder


	/**
	* This class allows to inject into objects through a base class,
	* so we don't have to repeat injection code everywhere.
	*
	* The performance drawback is about 0.013 ms per injection on a very slow device,
	* which is negligible in most cases.
	*
	* Example:
	* <pre>{@code

	#!/usr/bin/python

	# License for any modification to the original (linked below):
	# ----------------------------------------------------------------------------
	# "THE BEER-WARE LICENSE" (Revision 42):
	# Sebastiano Poggi and Daniele Conti wrote this file. As long as you retain
	# this notice you can do whatever you want with this stuff. If we meet some day,
	# and you think this stuff is worth it, you can buy us a beer in return.

	import argparse, sys, subprocess, tempfile

	/*
	* Copyright (C) 2015 Jake Wharton
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

	/*
	* Copyright 2014 Chris Banes
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

	import rx.Observable;
	import rx.subjects.PublishSubject;
	import rx.subjects.SerializedSubject;
	import rx.subjects.Subject;

	/**
	* Simple pass-thru event bus with error handling and reconnect.
	*/
	public class EventBus {

	# Retrofit, OkHttp, Gson
	-keepattributes Annotation
	-keepattributes Signature
	-keep class com.squareup.okhttp.** { *; }
	-keep interface com.squareup.okhttp.** { *; }
	-dontwarn com.squareup.okhttp.**
	-dontwarn rx.**
	-dontwarn retrofit.**
	-keep class retrofit.** { *; }
	-keepclasseswithmembers class * {

	# Copyright (c) 2011, Eng Eder de Souza
	# ___ _ _ ___
	# \| __\|__\| \|___ _ _ __\| \|___ / __\| ___ _ _ _____ _
	# \| _\|/ _` / -_) '_\| / _` / -_) \__ \/ _ \ \|\| \|_ / _` \|
	# \|___\__,_\___\|_\| \__,_\___\| \|___/\___/\_,_/__\__,_\|
	#Accessing the Google API for speech recognition!
	#Open a file type Wav to speech recognition
	#This source does not require any external programs to perform audio conversions :-)
	#http://ederwander.wordpress.com/2011/11/06/accessing-the-google-speech-api-python/
	#Eng Eder de Souza