Store history and team names persistent in shared preferences.

app/build.gradle

@@ -38,6 +38,7 @@ dependencies {
     implementation 'androidx.core:core-ktx:1.3.1'
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.0'
+    implementation 'com.google.code.gson:gson:2.8.5'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
     implementation 'androidx.navigation:navigation-fragment-ktx:2.3.0'
     implementation 'androidx.navigation:navigation-ui-ktx:2.3.0'

app/src/main/java/me/zobrist/tichucounter/History.kt

@@ -2,16 +2,10 @@
 
 package me.zobrist.tichucounter
 
-import android.os.Parcel
-import android.os.Parcelable
 
-class History() : Parcelable {
+class History() {
     private var scores: ArrayList<Round> = ArrayList()
 
-    constructor(parcel: Parcel) : this() {
-        scores = parcel.readSerializable() as ArrayList<Round>
-    }
-
     fun getScoreA(): Int {
         var tempScore = 0
         scores.forEach {
@@ -31,7 +25,7 @@ class History() : Parcelable {
     fun getHistoryA(): String {
         var tempHistory = String()
         scores.forEach {
-            tempHistory = tempHistory.plus(it.scoreA.toString()).plus("\n")
+            tempHistory += it.scoreA.toString() + "\n"
         }
         return tempHistory
     }
@@ -39,7 +33,7 @@ class History() : Parcelable {
     fun getHistoryB(): String {
         var tempHistory = String()
         scores.forEach {
-            tempHistory = tempHistory.plus(it.scoreB.toString()).plus("\n")
+            tempHistory += it.scoreB.toString() + "\n"
         }
         return tempHistory
     }
@@ -61,23 +55,4 @@ class History() : Parcelable {
     fun isEmpty(): Boolean {
         return scores.isEmpty()
     }
-
-    override fun writeToParcel(parcel: Parcel, flags: Int) {
-        parcel.writeSerializable(scores)
-    }
-
-    override fun describeContents(): Int {
-        return 0
-    }
-
-    companion object CREATOR : Parcelable.Creator<History> {
-        override fun createFromParcel(parcel: Parcel): History {
-            return History(parcel)
-        }
-
-        override fun newArray(size: Int): Array<History?> {
-            return arrayOfNulls(size)
-        }
-    }
-
 }

app/src/main/java/me/zobrist/tichucounter/MainActivity.kt

@@ -12,6 +12,7 @@ import android.widget.ScrollView
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.widget.doOnTextChanged
+import com.google.gson.Gson
 import kotlinx.android.synthetic.main.content_main.*
 
 class MainActivity : AppCompatActivity() {
@@ -35,9 +36,10 @@ class MainActivity : AppCompatActivity() {
                 .getBoolean("Screen_On", false)
         )
 
-
+        val json = this.getSharedPreferences("Settings", Context.MODE_PRIVATE).getString("history", "{\"scores\":[]}")
-
+        history = Gson().fromJson(json, History::class.java)
-        history = savedInstanceState?.getParcelable("history") ?: History()
+        nameTeamA.setText(this.getSharedPreferences("Settings", Context.MODE_PRIVATE).getString("nameTeamA", "TeamA"))
+        nameTeamB.setText(this.getSharedPreferences("Settings", Context.MODE_PRIVATE).getString("nameTeamB", "TeamB"))
         updateView()
 
 
@@ -292,7 +294,13 @@ class MainActivity : AppCompatActivity() {
 
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
-        outState.putParcelable("history", history)
+
+        val prefs = this.getSharedPreferences("Settings", Context.MODE_PRIVATE).edit()
+        prefs.putString("history", Gson().toJson(history))
+        prefs.putString("nameTeamA", nameTeamA.text.toString())
+        prefs.putString("nameTeamB", nameTeamB.text.toString())
+        prefs.apply()
+
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {