patrick-elmquist

-- Example table
CREATE TABLE ring_buffer (id INTEGER PRIMARY KEY AUTOINCREMENT, data TEXT);

-- Number 10 on where statement defines the ring buffer's size
CREATE TRIGGER delete_tail AFTER INSERT ON ring_buffer
BEGIN
    DELETE FROM ring_buffer WHERE id%10=NEW.id%10 AND id!=NEW.id;
END;

patrick-elmquist

<?xml version="1.0" encoding="utf-8"?>
<!--
  Copyright 2017 Google Inc.

  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 distributed under the License

patrick-elmquist

class ShowAdapter(private val items: List<Show>) : RecyclerView.Adapter<ShowViewHolder>() {
    init {
        setHasStableIds(true)
    }
    override fun getItemCount() = items.size
    override fun getItemId(position: Int) = items[position].hashCode().toLong()
    override fun onCreateViewHolder(parent: ViewGroup, vt: Int) = ShowViewHolder(parent.inflate(R.layout.item_show))
    override fun onBindViewHolder(holder: ShowViewHolder, position: Int) = holder.bind(items[position])
}

patrick-elmquist

data class Show(
  @StringRes val title: Int, 
  @StringRes val description: Int, 
  @DrawableRes val image: Int
)

patrick-elmquist

class ShowViewHolder(view: View) : ViewHolder(view) {
    private val title = itemView.title
    private val description = itemView.description
    private val thumbnail = itemView.thumbnail
    private val poster = itemView.poster

    private val interpolator = FastOutLinearInInterpolator()

    /**
     * Offset the thumb and text with a factor [-1.0..1.0] of the total width

patrick-elmquist

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:clipChildren="false"
    >

patrick-elmquist

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    ... >

    <ImageView
        android:id="@+id/poster"
        android:layout_width="match_parent"

patrick-elmquist

recyclerView.apply {
    // Create and attach the adapter
    adapter = ShowAdapter(tvShows)
    
    // Configure to be a horizontal list
    layoutManager = LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
    
    // Attach a snap helper, more on that below
    PagerSnapHelper().attachToRecyclerView(this)
    

patrick-elmquist

fun RecyclerView.setupParallaxScrollListener() {
    addOnScrollListener(object : OnScrollListener() {
        override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
            val layoutManager = layoutManager as? LinearLayoutManager ?: return

            val scrollOffset = recyclerView.computeHorizontalScrollOffset()
            val offsetFactor = (scrollOffset % measuredWidth) / measuredWidth.toFloat()

            val firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition()
            findViewHolderForAdapterPosition(firstVisibleItemPosition)?.let {

patrick-elmquist

#!/bin/bash

EMULATOR=~/Library/Android/sdk/tools/emulator

if [ $# -ne 1 ]; then
    echo "ERROR: Please specify the target AVD from the list below" 1>&2
    $EMULATOR -list-avds 1>&2
    exit 1
fi
$EMULATOR -avd $1 -dns-server "8.8.8.8,8.8.4.4"