Add basic switch for day/night mode

app/src/main/java/com/m2049r/xmrwallet/MainActivity.java

@@ -21,6 +21,7 @@ import com.m2049r.xmrwallet.service.MoneroHandlerThread;
 import com.m2049r.xmrwallet.service.PrefService;
 import com.m2049r.xmrwallet.service.TxService;
 import com.m2049r.xmrwallet.util.Constants;
+import com.m2049r.xmrwallet.util.NightmodeHelper;
 
 import java.io.File;
 
@@ -37,6 +38,7 @@ public class MainActivity extends AppCompatActivity implements MoneroHandlerThre
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+        NightmodeHelper.getAndSetPreferredNightmode(this);
         File walletFile = new File(getApplicationInfo().dataDir, Constants.WALLET_NAME);
         new PrefService(this);
 

app/src/main/java/com/m2049r/xmrwallet/fragment/settings/SettingsFragment.java

@@ -4,10 +4,12 @@ import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.CompoundButton;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.appcompat.widget.SwitchCompat;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProvider;
 
@@ -15,6 +17,8 @@ import com.m2049r.xmrwallet.R;
 import com.m2049r.xmrwallet.model.Wallet;
 import com.m2049r.xmrwallet.model.WalletManager;
 import com.m2049r.xmrwallet.service.BlockchainService;
+import com.m2049r.xmrwallet.util.DayNightMode;
+import com.m2049r.xmrwallet.util.NightmodeHelper;
 
 public class SettingsFragment extends Fragment {
 
@@ -31,7 +35,10 @@ public class SettingsFragment extends Fragment {
         super.onViewCreated(view, savedInstanceState);
         mViewModel = new ViewModelProvider(this).get(SettingsViewModel.class);
         Wallet wallet = WalletManager.getInstance().getWallet();
+
         TextView walletInfoTextView = view.findViewById(R.id.wallet_info_textview);
+        SwitchCompat nightModeSwitch = view.findViewById(R.id.day_night_switch);
+
         StringBuilder stringBuilder = new StringBuilder();
         stringBuilder.append("Seed: " + wallet.getSeed("")+"\n\n");
         stringBuilder.append("Private view-key: " + wallet.getSecretViewKey()+"\n\n");
@@ -39,5 +46,14 @@ public class SettingsFragment extends Fragment {
         stringBuilder.append("Wallet height: " + wallet.getBlockChainHeight() + "\n\n");
         stringBuilder.append("Daemon height: " + BlockchainService.getInstance().getDaemonHeight() + "\n\n");
         walletInfoTextView.setText(stringBuilder.toString());
+
+        nightModeSwitch.setChecked(NightmodeHelper.getPreferredNightmode(getContext()) == DayNightMode.NIGHT);
+        nightModeSwitch.setOnCheckedChangeListener((compoundButton, b) -> {
+            if(b) {
+                NightmodeHelper.setAndSavePreferredNightmode(getContext(), DayNightMode.NIGHT);
+            } else {
+                NightmodeHelper.setAndSavePreferredNightmode(getContext(), DayNightMode.DAY);
+            }
+        });
     }
 }

app/src/main/java/com/m2049r/xmrwallet/util/NightmodeHelper.java

@@ -26,16 +26,21 @@ import com.m2049r.xmrwallet.R;
 
 public class NightmodeHelper {
     public static DayNightMode getPreferredNightmode(Context context) {
-        return DayNightMode.valueOf(PreferenceManager.getDefaultSharedPreferences(context)
+        DayNightMode mode = DayNightMode.valueOf(PreferenceManager.getDefaultSharedPreferences(context)
                 .getString(context.getString(R.string.preferred_nightmode), "UNKNOWN"));
+        if(mode == DayNightMode.UNKNOWN) {
+            mode = DayNightMode.NIGHT;
+        }
+        return mode;
     }
 
-    public static void setPreferredNightmode(Context context) {
+    public static void getAndSetPreferredNightmode(Context context) {
-        final DayNightMode mode = DayNightMode.valueOf(PreferenceManager.getDefaultSharedPreferences(context)
+        DayNightMode mode = DayNightMode.valueOf(PreferenceManager.getDefaultSharedPreferences(context)
                 .getString(context.getString(R.string.preferred_nightmode), "UNKNOWN"));
-        if (mode == DayNightMode.UNKNOWN)
+        if(mode == DayNightMode.UNKNOWN) {
-            setAndSavePreferredNightmode(context, DayNightMode.AUTO);
+            mode = DayNightMode.NIGHT;
-        else
+        }
+
         setNightMode(mode);
     }
 

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

@@ -24,4 +24,13 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintEnd_toEndOf="parent"/>
 
+    <androidx.appcompat.widget.SwitchCompat
+        android:id="@+id/day_night_switch"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        android:layout_marginBottom="24dp"
+        android:layout_marginStart="24dp"/>
+
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values-night-v23/styles.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="MyMaterialTheme" parent="Theme.MaterialComponents.DayNight">
+        <item name="android:windowLightStatusBar">false</item>
+        <item name="windowNoTitle">true</item>
+        <item name="windowActionBar">false</item>
+        <item name="materialCardViewStyle">@style/AppCard</item>
+        <item name="materialButtonStyle">@style/AppButton</item>
+    </style>
+</resources>

app/src/main/res/values-v23/styles.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="MyMaterialTheme" parent="Theme.MaterialComponents.DayNight">
+        <item name="android:windowLightStatusBar">true</item>
+        <item name="windowNoTitle">true</item>
+        <item name="windowActionBar">false</item>
+        <item name="materialCardViewStyle">@style/AppCard</item>
+        <item name="materialButtonStyle">@style/AppButton</item>
+    </style>
+</resources>