switch to androidx

android/app/build.gradle

@@ -35,23 +35,21 @@ android {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 
-    implementation 'com.android.support:support-v4:28.0.0'
+    //implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'com.android.support:appcompat-v7:28.0.0'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
-    implementation 'com.android.support:cardview-v7:28.0.0'
+    implementation 'androidx.cardview:cardview:1.0.0'
-    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    implementation 'com.android.support:recyclerview-v7:28.0.0'
+    implementation 'androidx.recyclerview:recyclerview:1.0.0'
-    implementation 'com.android.support:design:28.0.0'
+    implementation 'com.google.android.material:material:1.0.0'
-
-    implementation 'com.takisoft.fix:preference-v7:28.0.0.0'
-    implementation 'com.takisoft.fix:preference-v7-extras:28.0.0.0'
 
     implementation 'com.google.firebase:firebase-core:16.0.4'
-    implementation 'com.google.firebase:firebase-messaging:17.3.3'
+    implementation 'com.google.firebase:firebase-messaging:17.3.4'
 
     implementation "android.arch.lifecycle:extensions:1.1.1"
 
     implementation 'com.squareup.okhttp3:okhttp:3.10.0'
     implementation 'com.github.kenglxn.QRGen:android:2.5.0'
+    implementation "com.github.DeweyReed:UltimateMusicPicker:2.0.0"
 }
 
 apply plugin: 'com.google.gms.google-services'

android/app/src/main/AndroidManifest.xml

@@ -2,6 +2,9 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.blackforestbytes.simplecloudnotifier">
 
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+
     <application
         android:allowBackup="false"
         android:name="SCNApp"

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/SCNApp.java

@@ -1,21 +1,20 @@
 package com.blackforestbytes.simplecloudnotifier;
 
 import android.app.Application;
-import android.arch.lifecycle.Lifecycle;
-import android.arch.lifecycle.LifecycleObserver;
-import android.arch.lifecycle.OnLifecycleEvent;
-import android.arch.lifecycle.ProcessLifecycleOwner;
 import android.content.Context;
 import android.widget.Toast;
 
-import com.blackforestbytes.simplecloudnotifier.model.CMessageList;
-import com.blackforestbytes.simplecloudnotifier.service.NotificationService;
 import com.blackforestbytes.simplecloudnotifier.view.AccountFragment;
 import com.blackforestbytes.simplecloudnotifier.view.MainActivity;
 import com.blackforestbytes.simplecloudnotifier.view.TabAdapter;
 
 import java.lang.ref.WeakReference;
 
+import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleObserver;
+import androidx.lifecycle.OnLifecycleEvent;
+import androidx.lifecycle.ProcessLifecycleOwner;
+
 public class SCNApp extends Application implements LifecycleObserver
 {
     private static SCNApp instance;

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/model/NotificationSettings.java

@@ -0,0 +1,15 @@
+package com.blackforestbytes.simplecloudnotifier.model;
+
+import android.graphics.Color;
+
+public class NotificationSettings
+{
+    public boolean EnableSound = false;
+    public String SoundSource = "";
+    public boolean RepeatSound = false;
+
+    public boolean EnableLED = false;
+    public int LEDColor = Color.BLUE;
+
+    public boolean EnableVibration = false;
+}

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/model/SCNSettings.java

@@ -22,6 +22,12 @@ public class SCNSettings
         }
     }
 
+    // ------------------------------------------------------------
+
+    public final static Integer[] CHOOSABLE_CACHE_SIZES = new Integer[]{20, 50, 100, 200, 500, 1000, 2000, 5000};
+
+    // ------------------------------------------------------------
+
     public int    quota_curr;
     public int    quota_max;
     public int    user_id;
@@ -30,6 +36,17 @@ public class SCNSettings
     public String fcm_token_local;
     public String fcm_token_server;
 
+    // ------------------------------------------------------------
+
+    public boolean Enabled = true;
+    public int LocalCacheSize = 500;
+
+    public final NotificationSettings PriorityLow  = new NotificationSettings();
+    public final NotificationSettings PriorityNorm = new NotificationSettings();
+    public final NotificationSettings PriorityHigh = new NotificationSettings();
+
+    // ------------------------------------------------------------
+
     public SCNSettings()
     {
         SharedPreferences sharedPref = SCNApp.getContext().getSharedPreferences("Config", Context.MODE_PRIVATE);
@@ -40,6 +57,30 @@ public class SCNSettings
         user_key         = sharedPref.getString("user_key", "");
         fcm_token_local  = sharedPref.getString("fcm_token_local", "");
         fcm_token_server = sharedPref.getString("fcm_token_server", "");
+
+        Enabled                     = sharedPref.getBoolean("app_enabled",  Enabled);
+        LocalCacheSize              = sharedPref.getInt("local_cache_size", LocalCacheSize);
+
+        PriorityLow.EnableLED       = sharedPref.getBoolean("priority_low:enabled_led",       PriorityLow.EnableLED);
+        PriorityLow.EnableSound     = sharedPref.getBoolean("priority_low:enabled_sound",     PriorityLow.EnableSound);
+        PriorityLow.EnableVibration = sharedPref.getBoolean("priority_low:enabled_vibration", PriorityLow.EnableVibration);
+        PriorityLow.RepeatSound     = sharedPref.getBoolean("priority_low:repeat_sound",      PriorityLow.RepeatSound);
+        PriorityLow.SoundSource     = sharedPref.getString( "priority_low:sound_source",      PriorityLow.SoundSource);
+        PriorityLow.LEDColor        = sharedPref.getInt(    "priority_low:led_color",         PriorityLow.LEDColor);
+
+        PriorityNorm.EnableLED       = sharedPref.getBoolean("priority_norm:enabled_led",       PriorityNorm.EnableLED);
+        PriorityNorm.EnableSound     = sharedPref.getBoolean("priority_norm:enabled_sound",     PriorityNorm.EnableSound);
+        PriorityNorm.EnableVibration = sharedPref.getBoolean("priority_norm:enabled_vibration", PriorityNorm.EnableVibration);
+        PriorityNorm.RepeatSound     = sharedPref.getBoolean("priority_norm:repeat_sound",      PriorityNorm.RepeatSound);
+        PriorityNorm.SoundSource     = sharedPref.getString( "priority_norm:sound_source",      PriorityNorm.SoundSource);
+        PriorityNorm.LEDColor        = sharedPref.getInt(    "priority_norm:led_color",         PriorityNorm.LEDColor);
+
+        PriorityHigh.EnableLED       = sharedPref.getBoolean("priority_high:enabled_led",       PriorityHigh.EnableLED);
+        PriorityHigh.EnableSound     = sharedPref.getBoolean("priority_high:enabled_sound",     PriorityHigh.EnableSound);
+        PriorityHigh.EnableVibration = sharedPref.getBoolean("priority_high:enabled_vibration", PriorityHigh.EnableVibration);
+        PriorityHigh.RepeatSound     = sharedPref.getBoolean("priority_high:repeat_sound",      PriorityHigh.RepeatSound);
+        PriorityHigh.SoundSource     = sharedPref.getString( "priority_high:sound_source",      PriorityHigh.SoundSource);
+        PriorityHigh.LEDColor        = sharedPref.getInt(    "priority_high:led_color",         PriorityHigh.LEDColor);
     }
 
     public void save()
@@ -54,6 +95,30 @@ public class SCNSettings
         e.putString("fcm_token_local",  fcm_token_local);
         e.putString("fcm_token_server", fcm_token_server);
 
+        e.putBoolean("app_enabled",                    Enabled);
+        e.putInt(    "local_cache_size",               LocalCacheSize);
+
+        e.putBoolean("priority_low:enabled_led",       PriorityLow.EnableLED);
+        e.putBoolean("priority_low:enabled_sound",     PriorityLow.EnableSound);
+        e.putBoolean("priority_low:enabled_vibration", PriorityLow.EnableVibration);
+        e.putBoolean("priority_low:repeat_sound",      PriorityLow.RepeatSound);
+        e.putString( "priority_low:sound_source",      PriorityLow.SoundSource);
+        e.putInt(    "priority_low:led_color",         PriorityLow.LEDColor);
+
+        e.putBoolean("priority_norm:enabled_led",       PriorityNorm.EnableLED);
+        e.putBoolean("priority_norm:enabled_sound",     PriorityNorm.EnableSound);
+        e.putBoolean("priority_norm:enabled_vibration", PriorityNorm.EnableVibration);
+        e.putBoolean("priority_norm:repeat_sound",      PriorityNorm.RepeatSound);
+        e.putString( "priority_norm:sound_source",      PriorityNorm.SoundSource);
+        e.putInt(    "priority_norm:led_color",         PriorityNorm.LEDColor);
+
+        e.putBoolean("priority_high:enabled_led",       PriorityHigh.EnableLED);
+        e.putBoolean("priority_high:enabled_sound",     PriorityHigh.EnableSound);
+        e.putBoolean("priority_high:enabled_vibration", PriorityHigh.EnableVibration);
+        e.putBoolean("priority_high:repeat_sound",      PriorityHigh.RepeatSound);
+        e.putString( "priority_high:sound_source",      PriorityHigh.SoundSource);
+        e.putInt(    "priority_high:led_color",         PriorityHigh.LEDColor);
+
         e.apply();
     }
 

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/service/FBMService.java

@@ -1,20 +1,13 @@
 package com.blackforestbytes.simplecloudnotifier.service;
 
-import android.app.NotificationManager;
-import android.app.PendingIntent;
-import android.content.Context;
-import android.content.Intent;
-import android.support.v4.app.NotificationCompat;
 import android.util.Log;
 import android.widget.Toast;
 
-import com.blackforestbytes.simplecloudnotifier.R;
 import com.blackforestbytes.simplecloudnotifier.SCNApp;
 import com.blackforestbytes.simplecloudnotifier.model.CMessage;
 import com.blackforestbytes.simplecloudnotifier.model.CMessageList;
 import com.blackforestbytes.simplecloudnotifier.model.PriorityEnum;
 import com.blackforestbytes.simplecloudnotifier.model.SCNSettings;
-import com.blackforestbytes.simplecloudnotifier.view.MainActivity;
 import com.google.firebase.messaging.FirebaseMessagingService;
 import com.google.firebase.messaging.RemoteMessage;
 

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/service/NotificationService.java

@@ -7,13 +7,14 @@ import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
 import android.os.Build;
-import android.support.v4.app.NotificationCompat;
 
 import com.blackforestbytes.simplecloudnotifier.R;
 import com.blackforestbytes.simplecloudnotifier.SCNApp;
 import com.blackforestbytes.simplecloudnotifier.model.CMessage;
 import com.blackforestbytes.simplecloudnotifier.view.MainActivity;
 
+import androidx.core.app.NotificationCompat;
+
 public class NotificationService
 {
     private final static String CHANNEL_ID = "CHAN_BFB_SCN_MESSAGES";

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/view/AccountFragment.java

@@ -6,8 +6,6 @@ import android.content.ClipboardManager;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -22,6 +20,9 @@ import com.blackforestbytes.simplecloudnotifier.model.SCNSettings;
 import net.glxn.qrgen.android.QRCode;
 import net.glxn.qrgen.core.image.ImageType;
 
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+
 import static android.content.Context.CLIPBOARD_SERVICE;
 
 public class AccountFragment extends Fragment

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/view/MainActivity.java

@@ -1,24 +1,18 @@
 package com.blackforestbytes.simplecloudnotifier.view;
 
-import android.support.design.widget.TabLayout;
-import android.support.v4.view.PagerAdapter;
-import android.support.v4.view.ViewPager;
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
-import android.support.v7.widget.Toolbar;
-import android.util.Log;
-import android.view.Menu;
-import android.view.MenuItem;
 
 import com.blackforestbytes.simplecloudnotifier.R;
 import com.blackforestbytes.simplecloudnotifier.SCNApp;
 import com.blackforestbytes.simplecloudnotifier.model.CMessageList;
 import com.blackforestbytes.simplecloudnotifier.model.SCNSettings;
-import com.blackforestbytes.simplecloudnotifier.model.ServerCommunication;
 import com.blackforestbytes.simplecloudnotifier.service.NotificationService;
-import com.google.firebase.iid.FirebaseInstanceId;
+import com.google.android.material.tabs.TabLayout;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.viewpager.widget.PagerAdapter;
+import androidx.viewpager.widget.ViewPager;
 
 public class MainActivity extends AppCompatActivity
 {

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/view/MessageAdapter.java

@@ -1,19 +1,18 @@
 package com.blackforestbytes.simplecloudnotifier.view;
 
-import android.support.annotation.NonNull;
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TextView;
-import android.widget.Toast;
 
 import com.blackforestbytes.simplecloudnotifier.R;
-import com.blackforestbytes.simplecloudnotifier.SCNApp;
 import com.blackforestbytes.simplecloudnotifier.model.CMessage;
 import com.blackforestbytes.simplecloudnotifier.model.CMessageList;
 
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
 public class MessageAdapter extends RecyclerView.Adapter
 {
     private final View vNoElements;

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/view/NotificationsFragment.java

@@ -1,18 +1,17 @@
 package com.blackforestbytes.simplecloudnotifier.view;
 
-import android.content.Context;
-import android.net.Uri;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.v4.app.Fragment;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
 import com.blackforestbytes.simplecloudnotifier.R;
 
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
 public class NotificationsFragment extends Fragment
 {
     public NotificationsFragment()

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/view/SettingsFragment.java

@@ -1,19 +1,56 @@
 package com.blackforestbytes.simplecloudnotifier.view;
 
+import android.media.AudioManager;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.v4.app.Fragment;
-import android.support.v7.preference.PreferenceFragmentCompat;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ImageView;
+import android.widget.Spinner;
+import android.widget.Switch;
+import android.widget.TextView;
 
 import com.blackforestbytes.simplecloudnotifier.R;
+import com.blackforestbytes.simplecloudnotifier.model.SCNSettings;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import xyz.aprildown.ultimatemusicpicker.UltimateMusicPicker;
 
 public class SettingsFragment extends Fragment
 {
+    private Switch  prefAppEnabled;
+    private Spinner prefLocalCacheSize;
+
+    private Switch    prefMsgLowEnableSound;
+    private TextView  tvMsgLowRingtone_value;
+    private View      prevMsgLowRingtone;
+    private Switch    prefMsgLowRepeatSound;
+    private Switch    prefMsgLowEnableLED;
+    private TextView  tvMsgLowLedColor;
+    private ImageView prefMsgLowLedColor;
+    private Switch    prefMsgLowEnableVibrations;
+
+    private Switch    prefMsgNormEnableSound;
+    private TextView  tvMsgNormRingtone_value;
+    private View      prevMsgNormRingtone;
+    private Switch    prefMsgNormRepeatSound;
+    private Switch    prefMsgNormEnableLED;
+    private TextView  tvMsgNormLedColor;
+    private ImageView prefMsgNormLedColor;
+    private Switch    prefMsgNormEnableVibrations;
+
+    private Switch    prefMsgHighEnableSound;
+    private TextView  tvMsgHighRingtone_value;
+    private View      prevMsgHighRingtone;
+    private Switch    prefMsgHighRepeatSound;
+    private Switch    prefMsgHighEnableLED;
+    private TextView  tvMsgHighLedColor;
+    private ImageView prefMsgHighLedColor;
+    private Switch    prefMsgHighEnableVibrations;
+
     public SettingsFragment()
     {
         // Required empty public constructor
@@ -24,6 +61,87 @@ public class SettingsFragment extends Fragment
     {
         View v = inflater.inflate(R.layout.fragment_settings, container, false);
 
+        {
+            prefAppEnabled             = v.findViewById(R.id.prefAppEnabled);
+            prefLocalCacheSize         = v.findViewById(R.id.prefLocalCacheSize);
+
+            prefMsgLowEnableSound      = v.findViewById(R.id.prefMsgLowEnableSound);
+            tvMsgLowRingtone_value     = v.findViewById(R.id.tvMsgLowRingtone_value);
+            prevMsgLowRingtone         = v.findViewById(R.id.prevMsgLowRingtone);
+            prefMsgLowRepeatSound      = v.findViewById(R.id.prefMsgLowRepeatSound);
+            prefMsgLowEnableLED        = v.findViewById(R.id.prefMsgLowEnableLED);
+            tvMsgLowLedColor           = v.findViewById(R.id.tvMsgLowLedColor);
+            prefMsgLowLedColor         = v.findViewById(R.id.prefMsgLowLedColor);
+            prefMsgLowEnableVibrations = v.findViewById(R.id.prefMsgLowEnableVibrations);
+
+            prefMsgNormEnableSound      = v.findViewById(R.id.prefMsgNormEnableSound);
+            tvMsgNormRingtone_value     = v.findViewById(R.id.tvMsgNormRingtone_value);
+            prevMsgNormRingtone         = v.findViewById(R.id.prevMsgNormRingtone);
+            prefMsgNormRepeatSound      = v.findViewById(R.id.prefMsgNormRepeatSound);
+            prefMsgNormEnableLED        = v.findViewById(R.id.prefMsgNormEnableLED);
+            tvMsgNormLedColor           = v.findViewById(R.id.tvMsgNormLedColor);
+            prefMsgNormLedColor         = v.findViewById(R.id.prefMsgNormLedColor);
+            prefMsgNormEnableVibrations = v.findViewById(R.id.prefMsgNormEnableVibrations);
+
+            prefMsgHighEnableSound      = v.findViewById(R.id.prefMsgHighEnableSound);
+            tvMsgHighRingtone_value     = v.findViewById(R.id.tvMsgHighRingtone_value);
+            prevMsgHighRingtone         = v.findViewById(R.id.prevMsgHighRingtone);
+            prefMsgHighRepeatSound      = v.findViewById(R.id.prefMsgHighRepeatSound);
+            prefMsgHighEnableLED        = v.findViewById(R.id.prefMsgHighEnableLED);
+            tvMsgHighLedColor           = v.findViewById(R.id.tvMsgHighLedColor);
+            prefMsgHighLedColor         = v.findViewById(R.id.prefMsgHighLedColor);
+            prefMsgHighEnableVibrations = v.findViewById(R.id.prefMsgHighEnableVibrations);
+        }
+
+        {
+            SCNSettings s = SCNSettings.inst();
+
+            prefAppEnabled.setChecked(s.Enabled);
+            prefAppEnabled.setOnCheckedChangeListener((a,b) -> onUpdate());
+
+            prefLocalCacheSize.setAdapter(new ArrayAdapter<>(v.getContext(), android.R.layout.simple_spinner_item, SCNSettings.CHOOSABLE_CACHE_SIZES));
+            prefLocalCacheSize.setSelection(getCacheSizeIndex(s.LocalCacheSize));
+            prefLocalCacheSize.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
+            {
+                @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { onUpdate(); }
+                @Override public void onNothingSelected(AdapterView<?> parent) { onUpdate();  }
+            });
+
+            //TODO ...
+
+            prevMsgLowRingtone.setOnClickListener((a) -> chooseRingtoneLow());
+        }
+
         return v;
     }
+
+    private void onUpdate()
+    {
+        SCNSettings s = SCNSettings.inst();
+
+        s.Enabled = prefAppEnabled.isChecked();
+
+    }
+
+    private int getCacheSizeIndex(int value)
+    {
+        for (int i = 0; i < SCNSettings.CHOOSABLE_CACHE_SIZES.length; i++)
+        {
+            if (SCNSettings.CHOOSABLE_CACHE_SIZES[i] == value) return i;
+        }
+        return 2;
+    }
+
+    private void chooseRingtoneLow()
+    {
+        new UltimateMusicPicker()
+            .windowTitle("Choose notification sound")
+            .removeSilent()
+            .streamType(AudioManager.STREAM_ALARM)
+            .ringtone()
+            .notification()
+            .alarm()
+            .music()
+            .goWithActivity(this, 0, MainActivity.class);
+    }
 }

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/view/TabAdapter.java

@@ -1,8 +1,8 @@
 package com.blackforestbytes.simplecloudnotifier.view;
 
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
-import android.support.v4.app.FragmentManager;
+import androidx.fragment.app.FragmentManager;
-import android.support.v4.app.FragmentStatePagerAdapter;
+import androidx.fragment.app.FragmentStatePagerAdapter;
 
 public class TabAdapter extends FragmentStatePagerAdapter {
 

android/app/src/main/res/layout/fragment_settings.xml

@@ -32,7 +32,6 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content" />
 
-
                 <android.support.constraint.ConstraintLayout
                     android:layout_marginStart="4dp"
                     android:layout_marginEnd="4dp"
@@ -143,6 +142,7 @@
                     android:minHeight="48dp">
 
                     <LinearLayout
+                        android:id="@+id/prevMsgLowRingtone"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:orientation="vertical"
@@ -339,6 +339,7 @@
                     android:minHeight="48dp">
 
                     <LinearLayout
+                        android:id="@+id/prevMsgNormRingtone"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:orientation="vertical"
@@ -535,6 +536,7 @@
                     android:minHeight="48dp">
 
                     <LinearLayout
+                        android:id="@+id/prevMsgHighRingtone"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:orientation="vertical"

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

@@ -1,7 +1,7 @@
 <resources>
 
     <!-- Base application theme. -->
-    <style name="AppTheme" parent="@style/PreferenceFixTheme.Light.NoActionBar">
+    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
         <!--   your app branding color for the app bar -->
         <item name="colorPrimary">#3F51B5</item>
         <!--   darker variant for the status bar and contextual app bars -->

android/build.gradle

@@ -9,8 +9,6 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:3.2.1'
         classpath 'com.google.gms:google-services:4.0.1'
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
     }
 }
 

android/gradle.properties

@@ -11,3 +11,6 @@ org.gradle.jvmargs=-Xmx1536m
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
+
+android.useAndroidX=true
+android.enableJetifier=true