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30 Best Quotes on Programming – Software Development Quotes

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Quotes on Programming
Quotes on Programming

Hi Guys, Welcome to Proto Coders Point, In blog post is all about Software Development Quotes.

In this Post i will be sharing 30 best programming quotes that i have found from the web and this motivational quotes for programmers has motivated me to become a successful programmer in my career.

This Quotes on Programming are very much inspiring so i think this motivational Coding quotes/software quotes will motivate other programmers to build their own Career Goals.

And Hence i thought to share this programming quotes & sayings with you.

NOTE: Developer Quotes or programmers sayings in this post are none of mine quotes and please forgive me if i have missed to mention the right source.

30 Best programming quotes – Software Development Quotes

1. Don’t worry if it doesn’t work right.If everything did, you’d be out of a job.

2. Don’t comment bad code – rewrite it. – Brian Kernighan

Quotes on programming

3. A programming language is for thinking about programs, not for expressing programs you’ve already thought of. It should be a pencil, not a pen. – Paul Graham

4. Debugging is twice as hard as writing the code in the first place.Therfore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. – Rajanand

5. The computer was born to solve problems that did not exist before. – Bill Gates

Developer Quotes

6. We have to stop optimizing for programmers and start optimizing for users. — Jeff Atwood

7. All computers wait at the same speed.

8. Artificial Intelligence usually beats natural stupidity.
Artificial Intelligence quotes
 
9. Don’t compare yourself with anyone in this world…if you do so, you are insulting yourself. – Bill Gates
 
10. If you are born poor it’s not your mistake, but if you die poor it’s your mistake. – Bill Gates Quotes
 

11. Any fool can use a computer. Many do. –Ted Nelson

12. First, solve the problem. Then, write the code. – John Johnson

programming quotes and sayings

 13. Experience is the name everyone gives to their mistakes. – Oscar Wilde

14. “Programs must be written for people to read, and only incidentally for machines to execute.” – Harold Abelson

15. “Any fool can write code that a computer can understand. Good programmers write code that humans can understand.” – Martin Fowler

16. “I’m not a great programmer; I’m just a good programmer with great habits.” – Kent Beck

coding quotes

17. “How you look at it is pretty much how you’ll see it” – Rasheed Ogunlaru

18. “Computers are useless.  They can only give you answers.” –  Pablo Picasso

19. “The question of whether computers can think is like the question of whether submarines can swim.”

20. “Never trust a computer you can’t throw out a window.”

21. “ It’s hard enough to find an error in your code when you’re looking for it; it’s even harder when you’ve assumed your code is error-free. ”  – Steve McConnell

22.  “Walking on water and developing software from a specification are easy if both are frozen. ” – Edward V Berard

23. “Programming isn’t about what you know; it’s about what you can figure out.” – Chris Pine

24. “The only way to learn a new programming language is by writing programs in it.” – Dennis Ritchie

25. “Sometimes it’s better to leave something alone, to pause, and that’s very true of programming.” – Joyce Wheeler

26. “The most damaging phrase in the programming language is.. it’s always been done this way” – Grace Hopper

27. “Most good programmers do programming not because they expect to get paid or get adulation by the public, but because it is fun to program” – Linus Torvalds

28. “Intelligence is the ability to avoid doing work, yet getting the work done” – Linus Torvalds

29. “Before you start some work, always ask yourself three questions –

  1. Why am I doing it,
  2. What the results might be and
  3. Will I be successful.
chanakya quotes
chanakya quotes

Only when you think deeply and find satisfactory answers to these questions, go ahead.” – Chanakya

30. Nothing will work unless you do. – Maya Angelou

About Proto Coders Point

We most write programming contents that are related to Mobile Application Development.

the First category is Android and The other one is Cross Platform i.e Flutter Application Development for android, iOS as well as Web development

Shimmer Effect Android – A Facebook Github – Display loading indicator

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Shimmer Effect Android Display loading indicator
Shimmer Effect Android Display loading indicator

Hi Guys, Welcome to Proto Coders Point, In this Android Github library tutorial we will discuss and implement Facebook Shimmer Effect library which is easy to implement, and a flexible way to add a shimmering effect to any view in an Android app.

What is Shimmer Effect?

A Shimmer Effect is just an shine effect on any of the View like text, images or any widget.

Shimmer is one of the Android github library that is one of the easiest way to add an shimmer effect to a views in android xml layout.

Now a day it is mostly used as loading indicator.

Facebook shimmer android effect is been implemented in the layout file, That means we can simple nest any number of android views inside a ShimmerFrameLayout tag. and just you need to initialize and call the start or stop shimmer method to begin animation effect.

Ok let’s begin adding the Library in our android project

Final Result of the Below Complete Code

Facebook Shimmer Effect Android

youtube video Tutorial on Facebook Shimmer android example

 

Implementation of Facebook shimmer effect library

1. Adding dependencies in your project

To include Shimmer in your project, add the following dependency:

Project > App > Gradle Script > Open build.gradle(module.app)

// Gradle dependency on Shimmer for Android
dependencies {
  implementation 'com.facebook.shimmer:shimmer:0.5.0'
}

then after adding library just click on sync now  and now all set shimmer library is added in project successfully.

2. Xml Usage

Snippet code of ShimmerFrameLayout

<com.facebook.shimmer.ShimmerFrameLayout
     android:id="@+id/shimmer_view_container"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content">


     ...(your view here)...
</com.facebook.shimmer.ShimmerFrameLayout>

The above snippet code will show how you can use the Library view.

you can also initialize to auto_start to start the shimmer animation

there are many other attributes of this library

Attributes

You can control the look and pace of the effect using a number of custom attributes on the ShimmerFrameLayout tag.

Clip to Children
Whether to clip the shimmering effect to the children, or to opaquely draw the shimmer on top of the children. Use this if your overall layout contains transparency.
Colored
Whether you want the shimmer to affect just the alpha or draw colors on-top of the children.
Base Color
If colored is specified, the base color of the content.
Highlight Color
If colored is specified, the shimmer’s highlight color.
Base Alpha
If colored is not specified, the alpha used to render the base view i.e. the unhighlighted view over which the highlight is drawn.
Highlight Alpha
If colored is not specified, the alpha of the shimmer highlight.
Auto Start
Whether to automatically start the animation when the view is shown, or not.
Duration
Time it takes for the highlight to move from one end of the layout to the other.
Repeat Count
Number of times of the current animation will repeat.
Repeat Delay
Delay after which the current animation will repeat.
Repeat Mode
What the animation should do after reaching the end, either restart from the beginning or reverse back towards it.
Direction
The travel direction of the shimmer highlight: left to right, top to bottom, right to left or bottom to top.
Dropoff
Controls the size of the fading edge of the highlight.
Intensity
Controls the brightness of the highlight at the center
Shape
Shape of the highlight mask, either with a linear or a circular gradient.
Tilt
Angle at which the highlight is tilted, measured in degrees
Fixed Width, Height
Fixed sized highlight mask, if set, overrides the relative size value
Width, Height ratio
Size of the highlight mask, relative to the layout it is applied to.

For example

app:shimmer_auto_start="true"

3.  Programmatically start and stop of shimmer effect

create the object of Shimmer Frame Layout , i have create it as shimmer1, because i have 2 shimmer

ShimmerFrameLayout shimmer1;

point out to the reference view using shimmerFrameLayout id

shimmer1= (ShimmerFrameLayout) findViewById(R.id.shimmer_view_container1);

then, all you need to do is just call the startShimmer() method to start the animation effect.

shimmer1.startShimmer();

You can even stop the Shimmer effect using stop method

shimmer1.stopShimmer();

Complete Code of Facebook Shimmer Effect for android Application to show loading indication

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:background="#D6D6D6">
    <TextView
        android:id="@+id/textloading"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Loading Image.."
        android:layout_gravity="center"
        android:textSize="25sp"
        android:textStyle="bold|italic"/>
    <com.facebook.shimmer.ShimmerFrameLayout
        android:id="@+id/shimmer_view_container1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="5dp"
        >
    <View
        android:id="@+id/view1"
        android:layout_width="200dp"
        android:layout_height="300dp"
        android:background="#8A8888"
        android:layout_gravity="center"/>
    </com.facebook.shimmer.ShimmerFrameLayout>
    <ImageView
        android:layout_width="200dp"
        android:layout_height="300dp"
        android:visibility="gone"
        android:layout_gravity="center"
        android:id="@+id/imageload"
        android:background="@drawable/imageloaded"/>

    <com.facebook.shimmer.ShimmerFrameLayout
        android:id="@+id/shimmer_view_container2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:shimmer_shape="radial"
        android:layout_gravity="center">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="PROTO CODERS POINT"
            android:layout_gravity="center"
            android:textSize="25sp"
            android:textStyle="bold|italic"/>
    </com.facebook.shimmer.ShimmerFrameLayout>

    <TextView
        android:layout_gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Demo of Facebook Shimmer Effect"/>
</LinearLayout>

Main_Activity.java

package com.ui.shimmereffect;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import com.facebook.shimmer.ShimmerFrameLayout;

public class MainActivity extends AppCompatActivity {

    ShimmerFrameLayout shimmer1,shimmer2;
    ImageView imageload;
    View view1;
    TextView loading;

    Handler handler;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        handler= new Handler();

        imageload=(ImageView)findViewById(R.id.imageload);
        view1=(View)findViewById(R.id.view1);
        loading=(TextView)findViewById(R.id.textloading);

        shimmer1= (ShimmerFrameLayout) findViewById(R.id.shimmer_view_container1);
       shimmer1.startShimmer(); //start Shimmer animation of shimmer 1


        shimmer2= (ShimmerFrameLayout) findViewById(R.id.shimmer_view_container2);
        shimmer2.startShimmer(); //start Shimmer animation of shimmer 1

        Log.d("text","wait for 3 secs to load image");

        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                Log.d("text2","working");

                shimmer1.stopShimmer();
                view1.setVisibility(View.GONE);
                loading.setText("Loaded");

                imageload.setVisibility(View.VISIBLE);
            }
        },3000);

    }
}

Note: Here i am making use of handler to show the Facebook shimmer android effect for 3 seconds and then show the image.

you need to add an image in drawable folder to show image in ImageView.

Android ViewStub Tutorial With Example In Android Studio

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Android ViewStub Tutorial With Example In Android Studio
Android ViewStub Tutorial With Example In Android Studio

Android ViewStub, is a called as zero sized invisible view with which you can use load “layout resource” at the runtime by saving lot’s of processing time, ViewStub in android is a Zero Dimension View.

In android viewStub a layout is refered by a ViewStub is been inflated and added to UI only then we decide, In other words, A view is been displayed when every it is in real use by making it just visible. or when inflate() method is invokeed.

The Layout resource is inflated and then viewstub get replaces in its parent. The ViewStub is been displayed/ exists in the UI unitl the setVisibility is VISIBLE or inflate is invoked.

The android ViewStub is used when any Layout view are rarely used, this can reduce the memory usage and thus this will speed up the rendering of the views

DEMO ON VIEWSTUB ANDROID

Android ViewStub Tutorial With Example In Android Studio
Android ViewStub Tutorial With Example In Android Studio

Basic Syntax of ViewStup XML:

<ViewStub
        android:id="@+id/ViewStubId"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp"
        android:inflatedId="@+id/inflatedview"
        android:layout="@layout/activity_custum_view_stub" />

Then, the ViewStub can be defined that can be found using it’s id “ViewStubId”.

So after Inflation of the Layout ” activitity_custum_view_stub”. the view Stub is been removed from its parent.

Then the view which is been created by inflating the layout resource ” activitity_custum_view_stub” is found using the inflate is “inflateviewId”.

Important Methods Of ViewStub:

1. getInflatedId(): This method is used to get the id taken by the inflated view. This method returns an integer type value.

ViewStub simpleViewStub = new ViewStub(getApplicationContext()); // get the reference of ViewStub
int infaltedId = simpleViewStub.getInflatedId(); //using this we can get the id if the Inflated view

2. setLayoutResource(int layoutResource): This method is used to set the layout resource to inflate when this StubbedView becomes visible or invisible or when inflate() is invoked.

Below we set the layout resource that is used while inflating.

ViewStub simpleViewStub = new ViewStub(getApplicationContext()); // get the reference of ViewStub
simpleViewStub.setLayoutResource(R.layout.stub_layout); // set layout resource to inflate

3. inflate(): Ok now this inflate method is used to inflate the layout resource identified by getLayoutResource() and then replaces  it with our StubbedView in its parent.

View inflated = simpleViewStub.inflate();

4. setVisibility(int visibility): So the setVisibility method is used as it sounds i,e we can manually set the view to VISIBLE OR INVISIBLE OR GONE.

simpleViewStub.setVisibility(View.INVISIBLE);

5. setOnInflateListener(OnInflateListenerinflateListener): This method is used to listener event when we inflate the ViewStub. It specifies the inflate listener to be notified after this ViewStub successfully inflated its layout resource.

ViewStub simpleViewStub = new ViewStub(getApplicationContext()); // get the reference of ViewStub
// perform setOnInflateListener event
simpleViewStub.setOnInflateListener(new ViewStub.OnInflateListener() {
@Override
public void onInflate(ViewStub stub, View inflated) {
// do something here.
}
});

Android Viewstub example in Android Studio implementation:

Step 1 : Create a new Android Project

As usual now you need to create a new android project or just implement this viewStub in your existing project all left to you.

Step 2 : Design the UI

Open Open res -> layout ->activity_main.xml and  then just add below xml code:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:background="#9C7777"
    android:elevation="50dp"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_marginTop="20dp"
        android:layout_gravity="center">

    <Button
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:text="Show"
        android:id="@+id/ButtonShow"/>
    <Button
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:text="Hide"
        android:id="@+id/ButtonHide"/>
    <ViewStub
        android:id="@+id/simpleViewStub"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp"
        android:inflatedId="@+id/inflatedview"
        android:layout="@layout/activity_custum_view_stub" />
    </LinearLayout>

</LinearLayout>

Step 3 : Create a new XML File activity_custum_view_stub.xml

The copy paste the below xml code in the new xml file you just created.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".CustumViewStub"
    android:orientation="vertical">
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        app:srcCompat="@drawable/images"
         />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="This is An Example for Android ViewStub"/>
</LinearLayout>

Step 4: Open   src -> package -> MainActivity.java

MainAcitivity.java

In this step Firstly we get the reference of Button’s and ViewStub and then inflate the layout resource. In this we perform click events on Show and Hide Button’s. Show Button is used to show the inflated view and hide button is used to hide the inflated view from the screen. In inflated view i.e custom_stub.xml we display a ImageView with a TextView.

package com.ui.viewstub;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.view.ViewStub;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    ViewStub ViewStub;
    Button showButton, hideButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ViewStub = ((ViewStub) findViewById(R.id.simpleViewStub));
        ViewStub.inflate();
        showButton = (Button) findViewById(R.id.ButtonShow); // get the reference of show button
        hideButton = (Button) findViewById(R.id.ButtonHide);

        showButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ViewStub.setVisibility(View.VISIBLE);
            }
        });

        hideButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ViewStub.setVisibility(View.GONE);
            }
        });
    }
}

Then, It’s all set the app is ready to run for testing.

Hero Animation in Flutter Application Development

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flutter hero animations
flutter hero animations

Hi Guys, Welcome to Proto Coders Point, In this Tutorial Will be implement  Hero Animation in flutter using a Widget Called Hero.

Hero Animation in Flutter Application Development

Hero Transition is a great to show an animation effect in flutter. They let’s the user know that they have changed the screens, while keeping the focus of the interaction.

Flutter has a widget  called Hero,That will automatically create an hero animation transition effect between two navigation Routes.

Hero Animation in Flutter Application Development

Flutter will figure out the widget in both routes & animate the chnages that happens between the route locations.

Let’s suppose you have to show animation effect on a image in flutter app as your UI Hero Animation.

Put it on both the page screen routes.

The one that you’ll be transition from (MyHomePage.dart) and the one you’ll be transition to (Screen2.dart).

Then just you need to Wrap the Flutter Image Widget with a Here Widget on both the Pages.

snippet Code of Hero Animation Widget

Hero(
              tag: 'image',
              child: Container(
                child: Image.asset('images/flash.png'),
                height: 300.0,
              ),
),

then you need to provide a tag to you hero Animation widget.

the Important thing is to use the same tag on both the pages,So that Flutter gets to know which Hero we are Animating.

Video Tutorial

Implementation of Flutter Hero Animation Widget to show Transition Effect

I have created new Flutter project in Android Studio, and then Created a 2 screens i.e main.dart and Screen2.dart

Copy and paste the below codes in respective dart files.

main.dart

hero animation in flutter
import 'package:flutter/material.dart';
import 'package:flutter_app_hero_animation/screen2.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
      routes: {
        'screen2': (context) => Screen2(),
      },
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Hero Animation'),
      ),
      body: Column(
        children: <Widget>[
          RaisedButton(
            child: Text("Go to Screen 2"),
            onPressed: () {
              Navigator.pushNamed(context, 'screen2');
            },
          ),
          Hero(
            tag: 'image',
            child: Container(
              child: Image.asset('images/flash.png'),
              height: 100.0,
            ),
          ),
        ],
      ),
    );
  }
}

Here in main.dart file i have created a Named routes from that i can easily Navigate from main.dart to Screen2.dart.

main.dart file have 2 main widgets that is a RaisedButton and an Hero widget that contains child as Container with in turn has a child with Widget Image.

Screen2.dart

hero animation in flutter
hero animation screen 2
import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Screen2(),
    );
  }
}

class Screen2 extends StatefulWidget {
  @override
  _Screen2State createState() => _Screen2State();
}

class _Screen2State extends State<Screen2> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Hero Animation'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'This is Screen 2',
              style: TextStyle(fontSize: 25.0),
            ),
            Hero(
              tag: 'image',
              child: Container(
                child: Image.asset('images/flash.png'),
                height: 300.0,
              ),
            ),
          ],
        ),
      ),
    );
  }
}

as you can see in both the above pages codes that i have made user of Hero Widget that has a tag : ‘image’ with both the pages so that flutter can identify which widget should show Hero Animation

and All is set app is ready to show Hero Amination in your flutter app.

For Custom Animation in Flutter check out this post  here

Flutter Animation- Custom Animation Effect with Example

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Flutter Animation Custom Animation Effect with Example
Flutter Animation Custom Animation Effect with Example

Hi Guys, Welcome to Proto Coders Point , In this Tutorial we will implement Flutter Animation with  example.

As usual you need to create new Flutter project or work with existing project

Introduction to Flutter from official site

So let’s begin implementation of Animation in Flutter

Flutter – Custom Animation Effect with Example

AnimationController Class

A Animationcontroller as the name itself says that it is used for an animation effects in Flutter Development.

This class lets you perform tasks such as:

Code Snippet

AnimationController controller;

controller = AnimationController(
      duration: Duration(seconds: 3),
      vsync: this,
      upperBound: 100.0,
    );
    controller.forward();

    controller.addListener(() {
      setState(() {
        print(controller
            .value); //used to just print controller value to see changes
      });
    });

Duration : The length of time this animation should last.
If [reverseDuration] is specified, then [duration] is only used when going [forward]. Otherwise, it specifies the duration going in both directions.

vsync :  this

package:flutter/src/widgets/ticker_provider.dart mixin SingleTickerProviderStateMixin<T extends StatefulWidget> on State<T> implements TickerProvider
Provides a single [Ticker] that is configured to only tick while the current tree is enabled, as defined by [TickerMode].
To create the [AnimationController] in a [State] that only uses a single [AnimationController], mix in this class, then pass vsync: this to the animation controller constructor.
This mixin only supports vending a single ticker. If you might have multiple [AnimationController] objects over the lifetime of the [State], use a full [TickerProviderStateMixin] instead.

Center( 
       child: Container( 
       child: Image.asset('images/splash.png'), 
       height: controller.value, 
      ), 
),

In the above flutter animation i have simply gave an anim effect to an image where an image size gets increase within 3 seconds from Container height 0 to 100.

Here i am setting the container height from 0 – 100 in 3 seconds.

1. Flutter Animation Effect Example 1

Copy paste the Below lines of code in main.dart file of you animation project

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage>
    with SingleTickerProviderStateMixin {
  AnimationController controller;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    controller = AnimationController(
      duration: Duration(seconds: 3),
      vsync: this,
      upperBound: 100.0,
    );
    controller.forward();

    controller.addListener(() {
      setState(() {
        print(controller
            .value); //used to just print controller value to see changes
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Custom Animation In Flutter"),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          children: <Widget>[
            Center(
              child: Container(
                child: Image.asset('images/splash.png'),
                height: controller.value,
              ),
            ),
            Container(
              child: Text(
                "Animation Effect",
                style: TextStyle(
                    fontSize: 30.0,
                    fontWeight: FontWeight.w500,
                    fontStyle: FontStyle.italic),
              ),
            )
          ],
        ),
      ),
    );
  }
}

Output of above code flutter animation

custom Animation in flutter

The Above code will show the animation effect just once when the app is launched.

2.  Flutter Animation Effect for continues Animation.

so if you want to show any continous Animation that you can make user of Animation Class of flutter.

CurvedAnimation Class check official site here

CurvedAnimation Class

A CurvedAnimation defines the animation’s progress as a non-linear curve.

animation = CurvedAnimation(parent: controller, curve: Curves.easeIn);

Controlling the animation

animation.addStatusListener((status) {
      if (status == AnimationStatus.completed) {
        controller.reverse(from: 1.0);
      } else if (status == AnimationStatus.dismissed) {
        controller.forward();
      }
    });

in the above snippet i am making use of 2 feature of AnimationController i.e reverse and forword.

that basically work something like this

controller.forword(); will work from small to high

controller.reverse(from:1.0); this will work from high to small.

Complete Code the get Continous animation effect

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage>
    with SingleTickerProviderStateMixin {
  AnimationController controller;
  Animation animation;
  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    controller = AnimationController(
      duration: Duration(seconds: 3),
      vsync: this,
      upperBound: 1.0,
    );
    controller.forward();

    animation = CurvedAnimation(parent: controller, curve: Curves.easeIn);

    controller.addListener(() {
      setState(() {
        print(animation
            .value); //used to just print controller value to see changes
      });
    });

    animation.addStatusListener((status) {
      if (status == AnimationStatus.completed) {
        controller.reverse(from: 1.0);
      } else if (status == AnimationStatus.dismissed) {
        controller.forward();
      }
    });
  }

  @override
  void dispose() {
    // TODO: implement dispose
    super.dispose();
    controller.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Custom Animation In Flutter"),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          children: <Widget>[
            Center(
              child: Container(
                child: Image.asset('images/splash.png'),
                height: animation.value * 100,
              ),
            ),
            Container(
              child: Text(
                "Animation Effect",
                style: TextStyle(
                    fontSize: 30.0,
                    fontWeight: FontWeight.w500,
                    fontStyle: FontStyle.italic),
              ),
            )
          ],
        ),
      ),
    );
  }
}

But this animation will continue forever unless we trash the controller.

Even if this screen is dismissed that Controller will still be running and will make user of mobile memory or resources. So whenever you’re using animation controller in you project it’s really important that you tap it into dispose method.

@override
  void dispose() {
    // TODO: implement dispose
    super.dispose();
    controller.dispose(); // stop the animation
  }

This dispose method will stop the controller animation effect when the screen if been changed.

Output

Continous flutter animation effect
Continous animation effect

3. Change Background Color with Flutter Animation example 3

In this Flutter Animation example we are making user of ColorTween Class  to change the backgroudColor as an amination effect.

ColorTween Class has 2 properties begin and end where you need to specific the begin color and end color

begin ↔ Color

The value this variable has at the beginning of the animation.

end ↔ Color

The value this variable has at the end of the animation.

Complete Code to change the backGround Color with Flutter Animation

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage>
    with SingleTickerProviderStateMixin {
  AnimationController controller;
  Animation animation;
  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    controller = AnimationController(
      duration: Duration(seconds: 5),
      vsync: this,
      upperBound: 1.0,
    );
    controller.forward();

    animation =
        ColorTween(begin: Colors.green, end: Colors.blue).animate(controller);

    controller.addListener(() {
      setState(() {
        print(animation
            .value); //used to just print controller value to see changes
      });
    });

//    animation.addStatusListener((status) {
//      if (status == AnimationStatus.completed) {
//        controller.reverse(from: 1.0);
//      } else if (status == AnimationStatus.dismissed) {
//        controller.forward();
//      }
//    });
  }

  @override
  void dispose() {
    // TODO: implement dispose
    super.dispose();
    controller.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: animation.value, // animation effect to background
      appBar: AppBar(
        title: Text("Custom Animation In Flutter"),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          children: <Widget>[
            Center(
              child: Container(
                child: Image.asset('images/splash.png'),
                height: 100.0,
              ),
            ),
            Container(
              child: Text(
                "Animation Effect",
                style: TextStyle(
                    fontSize: 30.0,
                    fontWeight: FontWeight.w500,
                    fontStyle: FontStyle.italic),
              ),
            )
          ],
        ),
      ),
    );
  }
}

Then, The above code will give you Output like this

change background color using flutter animation

Then,As you can observe in above Gif image that the background color of the app is been changing.

Flutter Rich Text Widget – To show TextView with Some textStyle

1
Flutter Rich Text Widget
Flutter Rich Text Widget

Hi Guys welcome to Proto Coders Point, In the Tutorial, we will learn about the Flutter widget class i.e Rich Text.

Introduction to Flutter RichText widget

In Flutter, RichText is used to display multiply text styles.

Here, the text to be displayed is done using TextSpan objects.

The text which is displayed in the rich text widget should be styled explicitly. you can set a DefaultTextStyle using the current BuildContext to provide defaults. To learn more on how to style text in RichText Widget. see the documentation for TextStyle.

Implementation of Flutter Rich Text Example

ok, So we now know the basic of the above Flutter Text Widget. It’s time to implement the widget in our project. For that, we need to first create a new Flutter Project or you can continue with your existing one.

File > New > New Flutter Project

If you can’t find any option to create a flutter project that might be because you have not installed the flutter plugin into your android studio.

Check out this post to install flutter in android studio.

How to install flutter in android studio

Example of Flutter RichText with Code.

Code

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Rich Text Demo"),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: RichText(
          text: TextSpan(
            text: 'The harder you work for something,',
            style: TextStyle(fontSize: 15.0, color: Colors.lightBlue),
            children: <TextSpan>[
              TextSpan(
                text: ' The greater you\'ll feel when you achieve it',
                style: TextStyle(
                    fontWeight: FontWeight.w600,
                    fontSize: 20,
                    color: Colors.red),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

Result:

Flutter rich text example

Here is another example of RichText Widget

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text("Rich Text Demo"),
        ),
        body: Padding(
          padding: const EdgeInsets.all(10.0),
          child: Column(
            children: <Widget>[
              Text(
                "Motivational Quotes",
                style: TextStyle(fontWeight: FontWeight.w800, fontSize: 25.0),
              ),
              RichText(
                text: TextSpan(
                  text: 'The harder you work for something,',
                  style: TextStyle(fontSize: 15.0, color: Colors.lightBlue),
                  children: <TextSpan>[
                    TextSpan(
                      text: ' The greater you\'ll feel when you achieve it',
                      style: TextStyle(
                          fontWeight: FontWeight.w600,
                          fontSize: 20,
                          color: Colors.red),
                    ),
                  ],
                ),
              ),
              Text(
                "Sentance 2",
                style: TextStyle(fontWeight: FontWeight.w900, fontSize: 30.0),
              ),
              RichText(
                text: TextSpan(
                  text: 'Your limitation',
                  style: TextStyle(fontSize: 15.0, color: Colors.lightBlue),
                  children: <TextSpan>[
                    TextSpan(
                      text: '— it\'s only your',
                      style: TextStyle(
                          fontWeight: FontWeight.w600,
                          fontSize: 20,
                          color: Colors.yellow[900]),
                    ),
                    TextSpan(
                      text: ' IMAGINATION.',
                      style: TextStyle(
                          fontWeight: FontWeight.w500,
                          color: Colors.green,
                          fontSize: 25),
                    )
                  ],
                ),
              ),
            ],
          ),
        ));
  }
}

Output – Result 

Flutter rich text flutter center
Flutter rich text flutter

Flutter RichText Widget is very much helpful when you want to show Text View in different TextStyle.

as in the above Code or image, I have made the Text font too big in the same sentence this you can’t Achieve using a normal Text Widget.

By you RichText in a flutter, we can Design the UI to show text to users as we want for example Making the first letter to be bigger in the sentence.

To learn more about flutter Widget visit the official Flutter site here