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@SuppressWarnings("unchecked")
public static <T extends View> T findView(Activity activity, int id) {
	return (T) activity.findViewById(id);
}

@SuppressWarnings("unchecked")
public static <T extends View> T findView(View view, int id) {
	return (T) view.findViewById(id);
}

dlew

public class LazyListManagerUtils {

  public static <T> List<T> add(List<T> list, T item) {
		if (list == null) {
			list = new ArrayList<T>();
			list.add(item);
		}
		else if (!list.contains(item)) {
			list.add(item);
		}

dlew

RetrofitService.doTheThing(params)              // Your typical API call
    .subscribeOn(Schedulers.io())               // Execute API call on IO thread
    .observeOn(AndroidSchedulers.mainThread())  // Execute observers on Android's main thread
    .subscribe(results -> handle(results));     // Handling the results of the API call

dlew

<style name="Widget" />

<style name="Widget.Button" />

<style name="Widget.Button.Alternative" parent="@android:style/SomeOtherStyle />

All buttons either use Widget.Button or Widget.Button.Alternative.

I decide to change something in Widget.Button.

dlew

<style name="MyTheme" parent="Theme.AppCompat.Light">
    <item name="actionBarStyle">@style/MyActionBarStyle</item>
</style>

<style name="MyActionBarStyle" parent="Widget.AppCompat.ActionBar.Solid">
    <item name="titleTextStyle">@style/MyTitleTextStyle</item>
</style>

<style name="MyTitleTextStyle" parent="TextAppearance.AppCompat.Widget.ActionBar.Title">
    <item name="android:textColor">#000000</item>

dlew

<!-- You can change the parent around to whatever you normally use -->
<style name="DebugColors" parent="Theme.AppCompat">

    <!-- System colors -->
    <item name="android:windowBackground">@color/__debugWindowBackground</item>

    <item name="android:colorPressedHighlight">#FF4400</item>
    <item name="android:colorLongPressedHighlight">#FF0044</item>
    <item name="android:colorFocusedHighlight">#44FF00</item>
    <item name="android:colorActivatedHighlight">#00FF44</item>

dlew

package rx.android.lifecycle;

import android.app.Activity;
import android.app.Application;
import android.content.Context;
import android.os.Bundle;
import rx.Observable;
import rx.subjects.BehaviorSubject;

import java.util.Map;

dlew

// Follow the five numbered instructions for setting up Crashlytics

buildscript {
    repositories {
        maven { url 'http://repo1.maven.org/maven2' }

        // 1. Add the Crashlytics Maven repository to your build script.
        maven { url 'http://download.crashlytics.com/maven' }
    }
    dependencies {

dlew

private CompositeSubscription subscriptions = new CompositeSubscription();

public <T> Observable<T> subscribe(Observable<T> observable) {
    subscriptions.add(observable.subscribe());
    return observable;
}

public <T> Observable.Transformer<T, T> subscribeTransformer() {
    return new Observable.Transformer<T, T>() {
        @Override

dlew

import rx.Observable;
import rx.subjects.PublishSubject;

public class Property<T> {

  private T value;
  private PublishSubject<T> property;

  public Property() {
    property = PublishSubject.create();