Vito Valov vitovalov

Free O'Reilly books and convenient script to just download them.

Thanks /u/FallenAege/ and /u/ShPavel/ from this Reddit post

How to use:

Take the download.sh file and put it into a directory where you want the files to be saved.
cd into the directory and make sure that it has executable permissions (chmod +x download.sh should do it)
Run ./download.sh and wee there it goes. Also if you do not want all the files, just simply comment the ones you do not want.

##Interfaces for presenters in MVP are a waste of time!

It's been a long time since we started talking about MVP. Today, the discussion is about if creating an interface for the Presenter in MVP is needed.

This is the Model View Presenter pattern's schema:

In this schema the Model box is related to all the code needed to implement your business logic, the presenter is the class implementing the presentation logic and the view is an interface created to abstract the view implementation.

Libraries

Oops, I forgot to add some files to my last commit!

Don't worry, instead of creating a new commit with the new files:

git add . // add new files
git commit -m "Oops I forgot some files sry"

You can fix your last commit!:

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

	public class ToolbarActivity extends AppCompatActivity {
	// Set the flags that fit your needs
	private static final int ENABLED_SCROLL_BEHAVIOR = AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS \| AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL;
	private static final int DISABLED_SCROLL_BEHAVIOR = 0;
	private static final int SCROLL_DOWN = 1;

	//Injected via ButterKnife (http://jakewharton.github.io/butterknife)
	@InjectView(R.id.toolbar)
	Toolbar toolbar;
	@InjectView(R.id.recyclerview)

	/*
	* Copyright (C) 2016 Jeff Gilfelt.
	*
	* 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

	def publish = project.tasks.create("copyReleaseApkToCustomDir")
	publish.description "Copies release apk to custom directory"
	android.applicationVariants.all { variant ->
	if (variant.buildType.name.equals("release")) {
	variant.outputs.each { output ->
	if ( output.outputFile != null && output.outputFile.name.endsWith('.apk')) {
	def task = project.tasks.create("copyAndRename${variant.name}Apk", Copy)

	def outputFile = output.outputFile
	println "Creating " + rootProject.name + "-${versionName}.apk" + " from " + project.name + "-${variant.name}.apk"

	Bitmap batmapBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.batman);
	RoundedBitmapDrawable circularBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), batmapBitmap);

	// option 1 h/t [Chris Banes](https://chris.banes.me/)
	circularBitmapDrawable.setCornerRadius(batmapBitmap.getWidth());

	// option 2 h/t @csorgod in the comments
	circularBitmapDrawable.setCircular(true);

	AppCompat-v7:21 provides a very useful way of dealing with pressed/focused/activated states maintaining backwards compatibility downto API-7, but there's a small issue (big for some) with the default selectableItemBackground: It uses some PNGs and/or default values for API<21.

	The main reason is that android drawable resource definitions (prior API 21) CANNOT use theme attributes at all, so there's no way of making something like:
	<shape android:shape="rectangle">
	<solid android:color="?attr/colorControlHighlight" />
	</shape>

	For this, I've put this simple mockup on how to give your app better drawables that the appcompat defaults.