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import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.AttributeSet;

ltvu93

public class AppUtils {

    public static void setupHideKeyboardWhenTouchOutside(View view, Context context) {

        // Set up touch listener for non-text box views to hide keyboard.
        if (!(view instanceof EditText)) {
            view.setOnTouchListener((v, event) -> {
                hideKeyBoard(v, context);
                return false;
            });

ltvu93

<provider
          android:name="android.support.v4.content.FileProvider"
          android:authorities="${applicationId}.fileprovider"
          android:exported="false"
          android:grantUriPermissions="true">
  
          <meta-data
                     android:name="android.support.FILE_PROVIDER_PATHS"
                     android:resource="@xml/file_paths" />
</provider>

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// https://medium.com/s23nyc-tech/geometric-android-animations-using-the-canvas-dd687c43f3f4
    override fun onDraw(canvas: Canvas) {
        super.onDraw(canvas)

        canvas.drawCircle(center.x, center.y, width / 2f, wavePaint)
        val path = createStarPath(width / 2f)
        canvas.drawPath(path, wavePaint)
    }

ltvu93

package com.example.geometricpractice

import android.animation.ValueAnimator
import android.content.Context
import android.graphics.*
import android.hardware.Sensor
import android.hardware.SensorEvent
import android.hardware.SensorEventListener
import android.hardware.SensorManager
import android.util.AttributeSet

ltvu93

package com.example.geometricpractice

import android.animation.ValueAnimator
import android.content.Context
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.DashPathEffect
import android.graphics.Paint
import android.util.AttributeSet
import android.view.animation.LinearInterpolator

ltvu93

    public static String getFormattedCurrencyString(String isoCurrencyCode, double amount){
        NumberFormat numberFormat = NumberFormat.getCurrencyInstance();
        Currency currency = Currency.getInstance(isoCurrencyCode);
        numberFormat.setCurrency(currency);

        return numberFormat.format(amount);
    }

    public static String getFormattedCurrencyString(Locale locale, String isoCurrencyCode, double amount){

ltvu93

class SinusoidalTween extends Animatable<double> {
  SinusoidalTween({this.min, this.max});

  final double min;
  final double max;

  @override
  double evaluate(Animation<double> animation) {
    if (animation.value == 0 || animation.value == 1)
      return min;

ltvu93

import 'package:flutter/material.dart';
import 'dart:math' as math;

class TestPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Stack(
          children: <Widget>[

ltvu93

class SpinnerTextPage extends StatefulWidget {
  @override
  _SpinnerTextPageState createState() => _SpinnerTextPageState();
}

class _SpinnerTextPageState extends State<SpinnerTextPage> {
  int count = 0;

  @override
  Widget build(BuildContext context) {