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mustafayigittmustafayigitt
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create project and put codes
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‎.idea/codeStyles/Project.xml‎

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‎.idea/codeStyles/codeStyleConfig.xml‎

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‎app/build.gradle‎

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plugins {
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id 'com.android.application'
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id 'kotlin-android'
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}
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android {
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compileSdkVersion 30
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buildToolsVersion "30.0.2"
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viewBinding {
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enabled true
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}
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defaultConfig {
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applicationId "com.mustafayigit.formvalidationwithkotlinflow"
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minSdkVersion 21
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targetSdkVersion 30
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = '1.8'
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}
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}
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dependencies {
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implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
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implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.3"
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implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.3"
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implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.3.1"
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implementation 'androidx.core:core-ktx:1.3.2'
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implementation 'androidx.appcompat:appcompat:1.2.0'
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implementation 'com.google.android.material:material:1.3.0'
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implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
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testImplementation 'junit:junit:4.+'
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androidTestImplementation 'androidx.test.ext:junit:1.1.2'
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androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
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}

‎app/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎app/src/androidTest/java/com/mustafayigit/formvalidationwithkotlinflow/ExampleInstrumentedTest.kt‎

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package com.mustafayigit.formvalidationwithkotlinflow
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import androidx.test.platform.app.InstrumentationRegistry
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import androidx.test.ext.junit.runners.AndroidJUnit4
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import org.junit.Test
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import org.junit.runner.RunWith
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import org.junit.Assert.*
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/**
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* Instrumented test, which will execute on an Android device.
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*
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* See [testing documentation](http://d.android.com/tools/testing).
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*/
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@RunWith(AndroidJUnit4::class)
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class ExampleInstrumentedTest {
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@Test
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fun useAppContext() {
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// Context of the app under test.
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val appContext = InstrumentationRegistry.getInstrumentation().targetContext
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assertEquals("com.mustafayigit.formvalidationwithkotlinflow", appContext.packageName)
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}
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}

‎app/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.mustafayigit.formvalidationwithkotlinflow">
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<application
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/Theme.FormValidationWithKotlinFlow">
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<activity android:name=".MainActivity">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎app/src/main/java/com/mustafayigit/formvalidationwithkotlinflow/MainActivity.kt‎

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package com.mustafayigit.formvalidationwithkotlinflow
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import android.content.res.ColorStateList
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import android.graphics.Color
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import android.os.Bundle
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import androidx.appcompat.app.AppCompatActivity
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import androidx.core.widget.doOnTextChanged
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import androidx.lifecycle.lifecycleScope
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import com.google.android.material.snackbar.Snackbar
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import com.mustafayigit.formvalidationwithkotlinflow.databinding.ActivityMainBinding
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import kotlinx.coroutines.flow.MutableStateFlow
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import kotlinx.coroutines.flow.collect
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import kotlinx.coroutines.flow.combine
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import kotlinx.coroutines.launch
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class MainActivity : AppCompatActivity() {
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private lateinit var mBinding: ActivityMainBinding
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private val defaultButtonTintColor = "#1B1717"
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private val onFormValidButtonTintColor = "#4F774F"
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private var errorMessage: String? = null
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private val email = MutableStateFlow("")
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private val password = MutableStateFlow("")
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private val passwordAgain = MutableStateFlow("")
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private val formIsValid = combine(
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email,
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password,
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passwordAgain
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) { email, password, passwordAgain ->
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mBinding.txtErrorMessage.text = ""
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val emailIsValid = email.length > 6
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val passwordIsValid = password.length in 7..15
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val passwordAgainIsValid = passwordAgain == password
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errorMessage = when {
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emailIsValid.not() -> "email not valid"
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passwordIsValid.not() -> "Password not valid"
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passwordAgainIsValid.not() -> "Passwords do not match"
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else -> null
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}
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errorMessage?.let {
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mBinding.txtErrorMessage.text = it
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}
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emailIsValid and passwordIsValid and passwordAgainIsValid
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}
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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mBinding = ActivityMainBinding.inflate(layoutInflater)
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setContentView(mBinding.root)
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// onCreate
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with(mBinding) {
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txtEmail.doOnTextChanged { text, _, _, _ ->
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email.value = text.toString()
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}
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txtPassword.doOnTextChanged { text, _, _, _ ->
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password.value = text.toString()
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}
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txtPasswordAgain.doOnTextChanged { text, _, _, _ ->
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passwordAgain.value = text.toString()
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}
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}
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val snackBar = Snackbar.make(mBinding.root, "Login Successfully", Snackbar.LENGTH_LONG)
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mBinding.btnLogin.setOnClickListener { snackBar.show() }
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lifecycleScope.launch {
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formIsValid.collect {
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mBinding.btnLogin.apply {
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backgroundTintList = ColorStateList.valueOf(
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Color.parseColor(
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if (it) onFormValidButtonTintColor else defaultButtonTintColor
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)
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)
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isClickable = it
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}
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}
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}
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}
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}

‎app/src/main/res/drawable-v24/ic_launcher_foreground.xml‎

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<vector xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:aapt="http://schemas.android.com/aapt"
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android:width="108dp"
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android:height="108dp"
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android:viewportWidth="108"
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android:viewportHeight="108">
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<path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
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<aapt:attr name="android:fillColor">
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<gradient
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android:endX="85.84757"
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android:endY="92.4963"
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android:startX="42.9492"
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android:startY="49.59793"
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android:type="linear">
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<item
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android:color="#44000000"
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android:offset="0.0" />
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<item
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android:color="#00000000"
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android:offset="1.0" />
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</gradient>
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</aapt:attr>
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</path>
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<path
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android:fillColor="#FFFFFF"
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android:fillType="nonZero"
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android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
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android:strokeWidth="1"
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android:strokeColor="#00000000" />
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</vector>

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