romannurik’s gists

romannurik / AndroidManifest.xml

Last active March 7, 2024 11:13

Android example of how to programmatically instantiate a View with a custom style.

	<manifest ...>
	...
	<!-- Make sure your app (or individual activity) uses the
	theme with the custom attribute defined. -->
	<application android:theme="@style/AppTheme" ...>
	...
	</application>
	</manifest>

romannurik / CharsPerLineActivity.java

Last active December 17, 2021 03:15

Demonstrates how to identify and avoid line-length issues with TextView. The measure, or characters per line, of a block of text plays a key role in how comfortable it is to read (sometimes referred to as readability). A widely accepted optimal range for a text block's measure is between 45 and 75 characters. This code demonstrates two phases of…

	/*
	* Copyright 2013 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

romannurik / AndroidCreateGhostIcon.java

Created June 14, 2013 06:28

Android ColorMatrixColorFilter example: Creates a 'ghost' bitmap version of the given source drawable (ideally a BitmapDrawable). In the ghost bitmap, the RGB values take on the values from the 'color' argument, while the alpha values are derived from the source's grayscaled RGB values. The effect is that you can see through darker parts of the …

	/**
	* Creates a 'ghost' bitmap version of the given source drawable (ideally a BitmapDrawable).
	* In the ghost bitmap, the RGB values take on the values from the 'color' argument, while
	* the alpha values are derived from the source's grayscaled RGB values. The effect is that
	* you can see through darker parts of the source bitmap, while lighter parts show up as
	* the given color. The 'invert' argument inverts the computation of alpha values, and looks
	* best when the given color is a dark.
	*/
	private Bitmap createGhostIcon(Drawable src, int color, boolean invert) {
	int width = src.getIntrinsicWidth();

romannurik / CheatSheet.java

Last active May 16, 2023 13:42

Android helper class for showing cheat sheets (tooltips) for icon-only UI elements on long-press. This is already default platform behavior for icon-only action bar items and tabs. This class provides this behavior for any other such UI element.

	/*
	* Copyright 2012 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

romannurik / SwipeDismissListViewTouchListener.java

Last active May 1, 2021 10:16

**BETA** Android 4.0-style "Swipe to Dismiss" sample code

	Moved to
	https://github.com/romannurik/android-swipetodismiss

romannurik / button_bar_layout.xml

Created April 10, 2012 04:24

How to make a proper button bar on ICS

	<!--
	A button bar is a set of buttons at the bottom of an activity.
	An example is an AlertDialog with OK/Cancel buttons.

	Note that something similar can be accomplished using a
	split action bar and text-only action buttons, but this is an
	alternate presentation that's often preferred.
	-->
	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical"

romannurik / inline_worker_with_fallback.html

Created May 24, 2011 19:16

An example of using simple inline Web Workers with a fallback for browsers that can't support this technique.

	<!DOCTYPE html>
	<html>
	<!--
	Copyright 2011 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

romannurik / android_layout.xml

Created May 7, 2011 22:29

Center-crop scaling, ala scaleType=centerCrop in Android, using CSS3's object-fit property. Opera only for now.

	<ImageView
	android:layout_width="100dp"
	android:layout_height="100dp"
	android:scaleType="centerCrop"
	android:src="@drawable/foo" />

romannurik / centered_triangle.html

Created May 3, 2011 05:43

A simple CSS trick to create a horizontally- or vertically-centered 'selected' callout triangle using zero images.

	<!DOCTYPE html>
	<html>
	<head>
	<style>
	body {
	margin: 40px;
	}

	a {
	display: inline-block;

romannurik / antialias_this_on_win_and_linux.html

Created April 6, 2011 01:45

For some reason, Canvas.drawImage, with scaling, doesn't result in good anti-aliasing (ideally bicubic resampling) in browsers on Windows and Linux. On Mac, it looks great. Can this be fixed?

	<!DOCTYPE html>
	<html>
	<head>
	<style>
	/* doesn't work */
	img, canvas {
	image-rendering: optimizeQuality;
	}
	</style>
	</head>

Roman Nurik romannurik