Different Frameworks and Libraries of Android

The main aim of frameworks is to increase productivity by reducing efforts which eventually saves lot of time for developers to resolve any other important issues in the app or game. These frameworks provides inbuilt tools for developers to work instantly on difficult and lengthy part of coding.


Some Popular Frameworks List:

1. Corona SDK
2. Phonegap
3. Xamarin
4. Sencha Touch 2
5. Appcelerator
6. Basic4Android
7. JQuery Mobile
8. Dojo Mobile
9. Sproutcore
10. Theappbuilder
11. DHTMLX Touch
12. Mo Sync SDK

Fixed nav-bar section

html code :

<div id="footer">    <hr>    <p>Designed by Arafat. No right reserved</p>    <a style="color: white; text-decoration: none; cursor: pointer; font-weight: bold;" href="dashboard.php">        <p> There is no God none but Allah</p>    </a>    <hr></div>

css code:

#footer {    padding: 10px;    border-top: 1px solid black;    color: #eeeeee;    background-color: #211f22;    text-align: center;    position: fixed;    left: 0;    bottom: 0;    width: 100%;}

try this for fixed footer section 

Android Library List

implementation 'com.github.rey5137:material:1.2.5'

// for paper library

implementation 'io.paperdb:paperdb:2.6'

Circular image

Github Repository xml attribute : <de.hdodenhof.circleimageview.CircleImageView xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/profile_image" android:layout_width="96dp" android:layout_height="96dp" android:src="@drawable/profile" app:civ_border_width="2dp" app:civ_border_color="#FF000000"/>

Dependency : implementation 'de.hdodenhof:circleimageview:2.2.0'

Picasso Library Link  Dependency :

implementation 'com.squareup.picasso:picasso:2.71828' if you get any error user this one implementation 'com.squareup.picasso:picasso:2.5.2'

Image cropper Library: Library Link Dependency :   implementation 'com.theartofdev.edmodo:android-image-cropper:2.6.+' (this one is stable)

// android arsenal link : https://android-arsenal.com/details/1/4136

implementation 'com.cepheuen.elegant-number-button:lib:1.0.2'

// from github Weather api Library: dependency :  compile 'com.loopj.android:android-async-http:1.4.9' Link : Weather api details Android Asynchronous Http Client Library address  dependency : compile 'com.loopj.android:android-async-http:1.4.9'

Big O notation

Different time complexity of some common algorithms ...

1. O(1)

O(1) describes an algorithm that will always execute in the same time (or space) regardless of the size of the input data set.

bool IsFirstElementNull(IList<string> elements)
{
    return elements[0] == null;
}

2. O(N)

O(N) describes an algorithm whose performance will grow linearly and in direct proportion to the size of the input data set. The example below also demonstrates how Big O favours the worst-case performance scenario; a matching string could be found during any iteration of the for loop and the function would return early, but Big O notation will always assume the upper limit where the algorithm will perform the maximum number of iterations.

bool ContainsValue(IList<string> elements, string value)
{
    foreach (var element in elements)
    {
        if (element == value) return true;
    }

    return false;
}

3. O(N²)

O(N²) represents an algorithm whose performance is directly proportional to the square of the size of the input data set. This is common with algorithms that involve nested iterations over the data set. Deeper nested iterations will result in O(N³), O(N⁴) etc.

bool ContainsDuplicates(IList<string> elements)
{
    for (var outer = 0; outer < elements.Count; outer++)
    {
        for (var inner = 0; inner < elements.Count; inner++)
        {
            // Don't compare with self
            if (outer == inner) continue;

            if (elements[outer] == elements[inner]) return true;
        }
    }

    return false;
}

4. O(2^N)

O(2^N) denotes an algorithm whose growth doubles with each additon to the input data set. The growth curve of an O(2^N) function is exponential - starting off very shallow, then rising meteorically. An example of an O(2^N) function is the recursive calculation of Fibonacci numbers:

int Fibonacci(int number)
{
    if (number <= 1) return number;

    return Fibonacci(number - 2) + Fibonacci(number - 1);
}

Source : Robert Bell 

Paper Library For Storing Current User

Library Github link : Paper Library Link

This library use to remember current login user.

Make corner shape Edit text in android

create a xml file in drawable and code like that:

<?xmlversion="1.0"encoding="utf-8"?>

<shape

xmlns:android="http://schemas.android.com/apk/res/android"

android:shape="rectangle">

<corners

android:bottomLeftRadius="10dp"

android:bottomRightRadius="10dp"

android:topLeftRadius="10dp"

android:topRightRadius="10dp"/>

<!--forpadding-->

<stroke

android:width="1.5dp"

android:color="#000"/>

<solid

android:color="#fff"/>

then in your edit text make the background this drawable xml file.

you can also use it in button, textView, imageView and many more widgets in android studio.

</shape>

Firebase New Dependency

For each project :

classpath 'com.google.gms:google-services:4.2.0' (in project level)

 apply plugin: 'com.google.gms.google-services' (in app level under dependency section)

implementation 'com.google.firebase:firebase-core:16.0.6'(in app level dependency section)

………………………………………..

implementation 'com.google.firebase:firebase-firestore:17.1.5'

com.google.firebase:firebase-core:16.0.6	Analytics
com.google.firebase:firebase-database:16.0.5	Realtime Database
com.google.firebase:firebase-firestore:17.1.5	Cloud Firestore
com.google.firebase:firebase-storage:16.0.5	Storage
com.crashlytics.sdk.android:crashlytics:2.9.7	Crashlytics
com.google.firebase:firebase-auth:16.1.0	Authentication
com.google.firebase:firebase-messaging:17.3.4	Cloud Messaging
com.google.firebase:firebase-config:16.1.2	Remote Config
com.google.firebase:firebase-invites:16.0.6	Invites and Dynamic Links
com.google.firebase:firebase-ads:17.1.2	AdMob
com.google.firebase:firebase-appindexing:17.1.0	App Indexing
com.google.firebase:firebase-perf:16.2.3	Performance Monitoring
com.google.firebase:firebase-functions:16.1.3	Cloud Functions for Firebase Client SDK
com.google.firebase:firebase-ml-vision:18.0.2	ML Kit (Vision)
com.google.firebase:firebase-ml-model-interpreter:16.2.4	ML Kit (Custom Model)

From <https://firebase.google.com/docs/android/setup#use_the_firebase_assistant>