alexwen

    public Observable<FilesWrapper> download(List<Thing> things) {
        
        return Observable.from(things)
                .flatMap(thing -> {
                    File file = new File(getExternalCacheDir() + File.separator + thing.getName());
                    if (file.exists()) {
                        return Observable.just(file);
                    }

                    Request request = new Request.Builder().url(thing.getUrl()).build();

marcelpinto

package com.eatfirst.android.ui.custom;

/**
 * Copyright 2015 Bartosz Lipinski
 *
 * 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

Tetr4

OkHttpClient okHttpClient = new OkHttpClient();
try {
    int cacheSize = 10 * 1024 * 1024  // 10 MiB
    Cache cache = new Cache(getCacheDir(), cacheSize);
    okHttpClient.setCache(cache);
} catch (IOException e) {
    Log.e(TAG, "Could not set cache", e);
}

// Forces cache. Used for cache connection

gabrielemariotti

Centralize the support libraries dependencies in gradle

Working with multi-modules project, it is very useful to centralize the dependencies, especially the support libraries.

A very good way is to separate gradle build files, defining something like:

root
  --gradleScript
 ----dependencies.gradle

patarkf

Step by step to install Scala + Play Framework in Ubuntu 14.04 with Activator.

Install Scala

sudo apt-get remove scala-library scala
wget http://www.scala-lang.org/files/archive/scala-2.11.6.deb
sudo dpkg -i scala-2.11.6.deb
sudo apt-get update
sudo apt-get install scala

grantland

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

cbeyls

package android.support.v4.preference;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Build;

stkent

Android Studio Shortcuts (Mac)

Notes:

• Two of the most useful shortcuts utilize the Fn (function) keys. It is therefore recommended that you enable the "Use all F1, F2, etc. keys as standard function keys" option [System Preferences > Keyboard].
• Be sure to enable the Mac OS X 10.5+ keymap in Android Studio [Preferences > Keymap].
• A fairly complete shortcut list can be found here.

Useful symbols:

slightfoot

import android.util.Log;

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;

import javax.net.SocketFactory;

hamakn

        // status bar height
        int statusBarHeight = 0;
        int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            statusBarHeight = getResources().getDimensionPixelSize(resourceId);
        }

        // action bar height
        int actionBarHeight = 0;
        final TypedArray styledAttributes = getActivity().getTheme().obtainStyledAttributes(