Fatimamostafa

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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Fatimamostafa

        try {
            PackageInfo info = getPackageManager().getPackageInfo(
                    "com.audacityit.jigglemed", PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {
                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
            }
        } catch (Exception e) {

Fatimamostafa

//Date converter
    public static String dateConverter(String dateFromApi) {
        TimeZone tz = Calendar.getInstance().getTimeZone();

        SimpleDateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        inputFormat.setTimeZone(TimeZone.getTimeZone("GMT"));

        SimpleDateFormat outputFormat = new SimpleDateFormat("dd MMM h:mm a");
        Date date = null;
        try {

Fatimamostafa

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient
        android:angle="90"
        android:startColor="#494949"
        android:endColor="#1cffffff"
        android:type="linear" />
</shape>

Fatimamostafa

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:bottom="0dp"
        android:right="0dp"
        android:top="0dp">

        <shape android:shape="line">

            <stroke
                android:width="1dp"

Fatimamostafa

    private Map<Integer, Person> map;
    private SparseArray<Person> sparseArray;


    //Memory allocation 17.45
    public void onMapBtnClick() {
        map  = new Hashmap();
        for(int i = 0; i< 10000; i++) {
            Person p = new Person(i, "Person " + i);
            map.put(i, p);