staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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jewelsea

import javafx.application.*;
import javafx.geometry.Pos;
import javafx.scene.*;
import javafx.scene.control.Label;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.stage.*;

import javax.imageio.ImageIO;
import java.io.IOException;

Mariovc

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;

wispborne

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;

import com.mywebgrocer.util.ActivityResultData;

import java.util.Random;

phit

The official docs are actually useful now, so refer to those for up-to-date information.

AndresGarciaSobrado91

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;

ologe

inline fun <reified T> SharedPreferences.observeKey(key: String, default: T): Flow<T> = channelFlow {
    send(getItem(key, default))

    val listener = SharedPreferences.OnSharedPreferenceChangeListener { _, k ->
        if (key == k) {
            trySend(getItem(key, default))
        }
    }
    registerOnSharedPreferenceChangeListener(listener)

zivkesten

// Extension for Activity
fun Activity.showAsBottomSheet(content: @Composable (() -> Unit) -> Unit) {
    val viewGroup = this.findViewById(android.R.id.content) as ViewGroup
    addContentToView(viewGroup, content)
}

// Extension for Fragment
fun Fragment.showAsBottomSheet(content: @Composable (() -> Unit) -> Unit) {
    val viewGroup = requireActivity().findViewById(android.R.id.content) as ViewGroup
    addContentToView(viewGroup, content)