Updated Material library version

app/build.gradle

@@ -30,11 +30,10 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.core:core-ktx:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'com.google.android.material:material:1.1.0-alpha10'
     implementation 'androidx.cardview:cardview:1.0.0'
     implementation 'com.crystal:crystalrangeseekbar:1.1.3'
 
-
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

app/src/main/java/com/example/quickmax/MainActivity.kt

@@ -4,9 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.View
-import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
-import com.google.android.material.card.MaterialCardView
 import kotlinx.android.synthetic.main.activity_main.*
 
 class MainActivity: AppCompatActivity() {
@@ -30,7 +28,7 @@ class MainActivity: AppCompatActivity() {
     }
 
     private val cardOnClickListener = View.OnClickListener { card ->
-        val numDigits = ((card as MaterialCardView).getChildAt(0) as TextView).text.toString().toInt()
+        val numDigits = getTextView(card).text.toString().toInt()
 
         saveSelectedValues()
 

app/src/main/java/com/example/quickmax/TaskActivity.kt

@@ -9,7 +9,6 @@ import android.os.Bundle
 import android.os.CountDownTimer
 import android.util.TypedValue
 import android.view.View
-import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import com.example.quickmax.answers.Answer
@@ -47,8 +46,8 @@ class TaskActivity : AppCompatActivity() {
 
     private fun setUpButtons() {
         for (answer in answerSet) {
-            (answer.card.getChildAt(0) as TextView).text = answer.value.toString()
-            (answer.card.getChildAt(0) as TextView).setTextColor(color(R.color.transparent_black))
+            getTextView(answer.card).text = answer.value.toString()
+            getTextView(answer.card).setTextColor(color(this, R.color.transparent_black))
             answer.card.setOnClickListener { processAnswer(answer) }
             answer.card.setCardBackgroundColor(Color.WHITE)
         }
@@ -67,20 +66,20 @@ class TaskActivity : AppCompatActivity() {
     }
 
     private fun setResponseText(answer: Answer) {
-        tv_timer.setTextSize(TypedValue.COMPLEX_UNIT_SP, resources.getDimension(R.dimen.response_text_size))
+        tv_response.setTextSize(TypedValue.COMPLEX_UNIT_SP, resources.getDimension(R.dimen.response_text_size))
         btn_next.visibility = View.VISIBLE
 
         if (answer.correct) {
-            tv_timer.text = resources.getString(R.string.response_correct)
-            answer.card.setCardBackgroundColor(color(R.color.colorAccent))
+            tv_response.text = resources.getString(R.string.response_correct)
+            answer.card.setCardBackgroundColor(color(this, R.color.colorAccent))
             btn_next.backgroundTintList = ContextCompat.getColorStateList(this, R.color.colorAccent)
-            btn_next.setTextColor(color(R.color.transparent_dark_black))
+            btn_next.setTextColor(color(this, R.color.transparent_dark_black))
         } else {
-            tv_timer.text = resources.getString(R.string.response_wrong)
-            answer.card.setCardBackgroundColor(color(R.color.colorPrimary))
+            tv_response.text = resources.getString(R.string.response_wrong)
+            answer.card.setCardBackgroundColor(color(this, R.color.colorPrimary))
             btn_next.backgroundTintList = ContextCompat.getColorStateList(this, (R.color.colorPrimary))
             btn_next.setTextColor(Color.WHITE)
-            (answer.card.getChildAt(0) as TextView).setTextColor(Color.WHITE)
+            getTextView(answer.card).setTextColor(Color.WHITE)
         }
     }
 
@@ -92,7 +91,7 @@ class TaskActivity : AppCompatActivity() {
 
     private fun startProgressBarAnimation() {
         val colorFrom = Color.TRANSPARENT
-        val colorTo = color(R.color.transparent_red)
+        val colorTo = color(this, R.color.transparent_red)
         colorAnimation = ValueAnimator.ofObject(ArgbEvaluator(), colorFrom, colorTo)
         colorAnimation.duration = millisToSolve
         colorAnimation.addUpdateListener { animator ->
@@ -105,20 +104,16 @@ class TaskActivity : AppCompatActivity() {
     private fun initTimer() {
         timer = object : CountDownTimer(millisToSolve, 1000) {
             override fun onTick(millisUntilFinished: Long) {
-                tv_timer.text = (millisUntilFinished/1000).toString()
+                tv_response.text = (millisUntilFinished/1000).toString()
             }
 
             override fun onFinish() {
-                tv_timer.setTextSize(TypedValue.COMPLEX_UNIT_SP, resources.getDimension(R.dimen.response_text_size))
-                tv_timer.text = resources.getString(R.string.time_is_over)
-                btn_next.background.setColorFilter(color(R.color.colorPrimary), PorterDuff.Mode.MULTIPLY)
+                tv_response.setTextSize(TypedValue.COMPLEX_UNIT_SP, resources.getDimension(R.dimen.response_text_size))
+                tv_response.text = resources.getString(R.string.time_is_over)
+                btn_next.background.setColorFilter(color(this@TaskActivity, R.color.colorPrimary), PorterDuff.Mode.MULTIPLY)
                 btn_next.setTextColor(Color.WHITE)
                 btn_next.visibility = View.VISIBLE
             }
         }
     }
-
-    private fun color(id: Int): Int {
-        return ContextCompat.getColor(this, id)
-    }
 }

app/src/main/java/com/example/quickmax/ViewUtils.kt

+package com.example.quickmax
+
+import android.content.Context
+import android.view.View
+import android.widget.FrameLayout
+import android.widget.TextView
+import androidx.core.content.ContextCompat
+import com.google.android.material.card.MaterialCardView
+
+fun getTextView(card: View): TextView {
+    return  ((card as MaterialCardView).getChildAt(0) as FrameLayout).getChildAt(0) as TextView
+}
+
+fun color(context: Context, id: Int): Int {
+    return ContextCompat.getColor(context, id)
+}
\ No newline at end of file

app/src/main/res/layout/activity_task.xml

@@ -32,7 +32,7 @@
     </LinearLayout>
 
     <TextView
-        android:id="@+id/tv_timer"
+        android:id="@+id/tv_response"
         style="@style/TextAppearance.MaterialComponents.Headline4"
         android:layout_width="0dp"
         android:layout_height="0dp"

app/src/main/res/values/styles.xml

@@ -14,9 +14,9 @@
         <item name="android:layout_margin">8dp</item>
         <item name="android:clickable">true</item>
         <item name="android:focusable">true</item>
-        <item name="android:foreground">?attr/selectableItemBackground</item>
+        <item name="android:checkable">true</item>
+        <item name="android:selectable">true</item>
         <item name="cardCornerRadius">6dp</item>
-        <item name="cardBackgroundColor">@android:color/white</item>
     </style>
 
     <style name="AnswerCardText">