AMOLED-friendly theme added

app/src/main/java/org/solovyev/android/calculator/Preferences.java

@@ -33,8 +33,6 @@ import android.support.annotation.*;
 import android.support.v7.view.ContextThemeWrapper;
 import android.text.TextUtils;
 import android.util.SparseArray;
-import jscl.AngleUnit;
-import jscl.NumeralBase;
 import org.solovyev.android.Check;
 import org.solovyev.android.calculator.about.AboutActivity;
 import org.solovyev.android.calculator.functions.FunctionsActivity;
@@ -42,6 +40,7 @@ import org.solovyev.android.calculator.history.HistoryActivity;
 import org.solovyev.android.calculator.language.Languages;
 import org.solovyev.android.calculator.math.MathType;
 import org.solovyev.android.calculator.operators.OperatorsActivity;
+import org.solovyev.android.calculator.preferences.PreferenceEntry;
 import org.solovyev.android.calculator.preferences.PreferencesActivity;
 import org.solovyev.android.calculator.variables.VariablesActivity;
 import org.solovyev.android.calculator.wizard.WizardActivity;
@@ -285,7 +284,7 @@ public final class Preferences {
             return mode.getPreferenceNoError(preferences);
         }
 
-        public enum Theme {
+        public enum Theme implements PreferenceEntry {
 
             default_theme(R.style.Cpp_Theme_Gray),
             violet_theme(R.style.Cpp_Theme_Violet),
@@ -294,12 +293,19 @@ public final class Preferences {
             metro_purple_theme(R.string.p_metro_purple_theme, R.style.Cpp_Theme_Metro_Purple, R.style.Cpp_Theme_Metro_Purple_Calculator, R.style.Cpp_Theme_Wizard, R.style.Cpp_Theme_Metro_Purple_Dialog, R.style.Cpp_Theme_Material_Dialog_Alert),
             metro_green_theme(R.string.p_metro_green_theme, R.style.Cpp_Theme_Metro_Green, R.style.Cpp_Theme_Metro_Green_Calculator, R.style.Cpp_Theme_Wizard, R.style.Cpp_Theme_Metro_Green_Dialog, R.style.Cpp_Theme_Material_Dialog_Alert),
             material_theme(R.string.cpp_theme_dark, R.style.Cpp_Theme_Material, R.style.Cpp_Theme_Material_Calculator),
+            material_black_theme(R.string.cpp_theme_black, R.style.Cpp_Theme_Material_Black, R.style.Cpp_Theme_Material_Black_Calculator) {
+                @NonNull
+                @Override
+                public String getName(@NonNull Context context) {
+                    return context.getString(name, material_theme.getName(context));
+                }
+            },
             material_light_theme(R.string.cpp_theme_light, R.style.Cpp_Theme_Material_Light, R.style.Cpp_Theme_Material_Light_Calculator, R.style.Cpp_Theme_Wizard_Light, R.style.Cpp_Theme_Material_Light_Dialog, R.style.Cpp_Theme_Material_Light_Dialog_Alert);
 
             private static final SparseArray<TextColor> textColors = new SparseArray<>();
 
             @StringRes
-            public final int name;
+            protected final int name;
             @StyleRes
             public final int theme;
             @StyleRes
@@ -373,6 +379,18 @@ public final class Preferences {
                 }
                 return textColor;
             }
+
+            @Override
+            @NonNull
+            public String getName(@NonNull Context context) {
+                return context.getString(name);
+            }
+
+            @NonNull
+            @Override
+            public CharSequence getId() {
+                return name();
+            }
         }
 
         public enum Mode {

app/src/main/java/org/solovyev/android/calculator/language/Language.java

@@ -1,15 +1,15 @@
 package org.solovyev.android.calculator.language;
 
 import android.content.Context;
+import android.support.annotation.NonNull;
 import android.text.TextUtils;
-
 import org.solovyev.android.calculator.R;
-
+import org.solovyev.android.calculator.preferences.PreferenceEntry;
-import java.util.Locale;
 
 import javax.annotation.Nonnull;
+import java.util.Locale;
 
-public final class Language {
+public final class Language implements PreferenceEntry{
     @Nonnull
     public final String code;
 
@@ -39,6 +39,7 @@ public final class Language {
         return locale.getDisplayName(locale);
     }
 
+    @Override
     @Nonnull
     public String getName(@Nonnull Context context) {
         if (!isSystem()) {
@@ -48,6 +49,12 @@ public final class Language {
         }
     }
 
+    @NonNull
+    @Override
+    public CharSequence getId() {
+        return code;
+    }
+
     public boolean isSystem() {
         return code.equals(Languages.SYSTEM_LANGUAGE_CODE);
     }

app/src/main/java/org/solovyev/android/calculator/preferences/PreferenceEntry.java

@@ -0,0 +1,12 @@
+package org.solovyev.android.calculator.preferences;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+
+public interface PreferenceEntry {
+    @NonNull
+    CharSequence getName(@NonNull Context context);
+
+    @NonNull
+    CharSequence getId();
+}

app/src/main/java/org/solovyev/android/calculator/preferences/PreferencesFragment.java

@@ -1,5 +1,6 @@
 package org.solovyev.android.calculator.preferences;
 
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Build;
@@ -13,6 +14,7 @@ import android.widget.ListView;
 import org.solovyev.android.calculator.AdView;
 import org.solovyev.android.calculator.Engine;
 import org.solovyev.android.calculator.Preferences;
+import org.solovyev.android.calculator.Preferences.Gui.Theme;
 import org.solovyev.android.calculator.R;
 import org.solovyev.android.calculator.language.Language;
 import org.solovyev.android.calculator.language.Languages;
@@ -25,6 +27,7 @@ import org.solovyev.android.wizard.Wizards;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
+import java.util.Arrays;
 import java.util.List;
 
 import static org.solovyev.android.calculator.App.cast;
@@ -154,32 +157,50 @@ public class PreferencesFragment extends org.solovyev.android.material.preferenc
             return;
         }
         final ListPreference theme = (ListPreference) preferenceManager.findPreference(Preferences.Gui.theme.getKey());
-        theme.setSummary(Preferences.Gui.getTheme(preferences).name);
+        final FragmentActivity context = getActivity();
+        populate(theme,
+                Theme.material_theme,
+                Theme.material_black_theme,
+                Theme.material_light_theme,
+                Theme.metro_blue_theme,
+                Theme.metro_green_theme,
+                Theme.metro_purple_theme);
+        theme.setSummary(Preferences.Gui.getTheme(preferences).getName(context));
         theme.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
             @Override
             public boolean onPreferenceChange(Preference preference, Object newValue) {
-                theme.setSummary(Preferences.Gui.Theme.valueOf((String) newValue).name);
+                final Theme newTheme = Theme.valueOf((String) newValue);
+                theme.setSummary(newTheme.getName(context));
                 return true;
             }
         });
     }
 
+    private static void populate(@Nonnull ListPreference preference, @Nonnull PreferenceEntry... entries) {
+        populate(preference, Arrays.asList(entries));
+    }
+
+    private static void populate(@Nonnull ListPreference preference, @Nonnull List<? extends PreferenceEntry> entries) {
+        final int size = entries.size();
+        final CharSequence[] e = new CharSequence[size];
+        final CharSequence[] v = new CharSequence[size];
+        final Context context = preference.getContext();
+        for (int i = 0; i < size; i++) {
+            final PreferenceEntry entry = entries.get(i);
+            e[i] = entry.getName(context);
+            v[i] = entry.getId();
+        }
+        preference.setEntries(e);
+        preference.setEntryValues(v);
+    }
+
     private void prepareLanguagePreference(int preference) {
         if (preference != R.xml.preferences_appearance) {
             return;
         }
 
         final ListPreference language = (ListPreference) preferenceManager.findPreference(Preferences.Gui.language.getKey());
-        final List<Language> languagesList = languages.getList();
+        populate(language, languages.getList());
-        final CharSequence[] entries = new CharSequence[languagesList.size()];
-        final CharSequence[] entryValues = new CharSequence[languagesList.size()];
-        for (int i = 0; i < languagesList.size(); i++) {
-            final Language l = languagesList.get(i);
-            entries[i] = l.getName(getActivity());
-            entryValues[i] = l.code;
-        }
-        language.setEntries(entries);
-        language.setEntryValues(entryValues);
         language.setSummary(languages.getCurrent().getName(getActivity()));
         language.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
             @Override

app/src/main/java/org/solovyev/android/calculator/wizard/ChooseThemeWizardStep.java

@@ -23,7 +23,6 @@
 package org.solovyev.android.calculator.wizard;
 
 import android.os.Bundle;
-import android.support.annotation.StringRes;
 import android.support.v7.view.ContextThemeWrapper;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -58,11 +57,12 @@ public class ChooseThemeWizardStep extends WizardFragment implements AdapterView
         final Preferences.Gui.Theme theme = Preferences.Gui.getTheme(preferences);
         final Spinner spinner = (Spinner) root.findViewById(R.id.wizard_theme_spinner);
         themes.clear();
-        themes.add(new ThemeUi(Preferences.Gui.Theme.material_theme, R.string.cpp_theme_dark));
+        themes.add(new ThemeUi(Preferences.Gui.Theme.material_theme));
-        themes.add(new ThemeUi(Preferences.Gui.Theme.material_light_theme, R.string.cpp_theme_light));
+        themes.add(new ThemeUi(Preferences.Gui.Theme.material_black_theme));
-        themes.add(new ThemeUi(Preferences.Gui.Theme.metro_blue_theme, R.string.p_metro_blue_theme));
+        themes.add(new ThemeUi(Preferences.Gui.Theme.material_light_theme));
-        themes.add(new ThemeUi(Preferences.Gui.Theme.metro_green_theme, R.string.p_metro_green_theme));
+        themes.add(new ThemeUi(Preferences.Gui.Theme.metro_blue_theme));
-        themes.add(new ThemeUi(Preferences.Gui.Theme.metro_purple_theme, R.string.p_metro_purple_theme));
+        themes.add(new ThemeUi(Preferences.Gui.Theme.metro_green_theme));
+        themes.add(new ThemeUi(Preferences.Gui.Theme.metro_purple_theme));
         adapter = new WizardArrayAdapter<>(getActivity(), themes);
         spinner.setAdapter(adapter);
         spinner.setSelection(findPosition(theme));
@@ -111,9 +111,9 @@ public class ChooseThemeWizardStep extends WizardFragment implements AdapterView
         @Nonnull
         final String name;
 
-        public ThemeUi(@Nonnull Preferences.Gui.Theme theme, @StringRes int name) {
+        public ThemeUi(@Nonnull Preferences.Gui.Theme theme) {
             this.theme = theme;
-            this.name = getString(name);
+            this.name = theme.getName(getActivity());
         }
 
         @Override

app/src/main/res/drawable-v21/material_button_black.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<ripple xmlns:a="http://schemas.android.com/apk/res/android"
+    a:color="@color/cpp_ripple_material_dark">
+    <item>
+        <shape>
+            <solid a:color="@color/grey_950" />
+        </shape>
+    </item>
+</ripple>

app/src/main/res/drawable-v21/material_button_black_lighter.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<ripple xmlns:a="http://schemas.android.com/apk/res/android"
+    a:color="@color/cpp_ripple_material_dark">
+    <item>
+        <shape>
+            <solid a:color="@color/grey_900" />
+        </shape>
+    </item>
+</ripple>

app/src/main/res/drawable-v21/material_button_deep_blue.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<ripple xmlns:a="http://schemas.android.com/apk/res/android"
+    a:color="@color/cpp_ripple_material_dark">
+    <item>
+        <shape>
+            <solid a:color="@color/deep_blue_900" />
+        </shape>
+    </item>
+</ripple>

app/src/main/res/drawable-v21/material_button_deep_blue_lighter.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<ripple xmlns:a="http://schemas.android.com/apk/res/android"
+    a:color="@color/cpp_ripple_material_dark">
+    <item>
+        <shape>
+            <solid a:color="@color/deep_blue_850" />
+        </shape>
+    </item>
+</ripple>

app/src/main/res/drawable/material_button_black.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<selector xmlns:a="http://schemas.android.com/apk/res/android">
+
+    <item a:drawable="@drawable/material_button_pressed" a:state_pressed="true" />
+
+    <item>
+        <shape>
+            <solid a:color="@color/grey_950" />
+        </shape>
+    </item>
+
+</selector>

app/src/main/res/drawable/material_button_black_lighter.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<selector xmlns:a="http://schemas.android.com/apk/res/android">
+
+    <item a:drawable="@drawable/material_button_pressed" a:state_pressed="true" />
+
+    <item>
+        <shape>
+            <solid a:color="@color/grey_900" />
+        </shape>
+    </item>
+
+</selector>

app/src/main/res/drawable/material_button_deep_blue.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<selector xmlns:a="http://schemas.android.com/apk/res/android">
+
+    <item a:state_pressed="true">
+        <shape>
+            <solid a:color="@color/deep_blue_850" />
+        </shape>
+    </item>
+
+    <item>
+        <shape>
+            <solid a:color="@color/deep_blue_900" />
+        </shape>
+    </item>
+
+</selector>

app/src/main/res/drawable/material_button_deep_blue_lighter.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<selector xmlns:a="http://schemas.android.com/apk/res/android">
+
+    <item a:state_pressed="true">
+        <shape>
+            <solid a:color="@color/deep_blue_800" />
+        </shape>
+    </item>
+
+    <item>
+        <shape>
+            <solid a:color="@color/deep_blue_850" />
+        </shape>
+    </item>
+
+</selector>

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

@@ -21,21 +21,6 @@
   -->
 
 <resources>
-    <string-array name="p_theme_names">
-        <item>@string/cpp_theme_dark</item>
-        <item>@string/cpp_theme_light</item>
-        <item>@string/p_metro_blue_theme</item>
-        <item>@string/p_metro_green_theme</item>
-        <item>@string/p_metro_purple_theme</item>
-    </string-array>
-    <string-array name="p_theme_values" translatable="false">
-        <item>material_theme</item>
-        <item>material_light_theme</item>
-        <item>metro_blue_theme</item>
-        <item>metro_green_theme</item>
-        <item>metro_purple_theme</item>
-    </string-array>
-
     <string-array name="p_simple_theme_names">
         <item>@string/p_use_app_theme</item>
         <item>@string/cpp_theme_dark</item>

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

@@ -47,6 +47,11 @@
     <color name="grey_850">#313131</color>
     <color name="grey_900">#212121</color>
     <color name="grey_950">#101010</color>
+    <color name="grey_965">#0a0a0a</color>
+
+    <color name="deep_blue_900">#06224d</color>
+    <color name="deep_blue_850">#082a5e</color>
+    <color name="deep_blue_800">#0a3980</color>
 
     <color name="blue_900">#0D47A1</color>
     <color name="blue_800">#1565C0</color>

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

@@ -16,6 +16,7 @@
     <string name="cpp_function_body" translatable="false">f(x, y)</string>
     <string name="cpp_show_greek_keyboard" translatable="false">αβγ</string>
     <string name="cpp_exponent" translatable="false">E</string>
+    <string name="cpp_theme_black" translatable="false">%1$s (AMOLED)</string>
     <string-array name="cpp_prefs_precisions" translatable="false">
         <item>0</item>
         <item>1</item>

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

@@ -0,0 +1,79 @@
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<resources>
+
+    <style name="CppKeyboardButton.Material.Black.Digit" parent="CppKeyboardButton">
+        <item name="android:background">@drawable/material_button_black</item>
+    </style>
+
+    <style name="CppKeyboardButton.Material.Black.Digit.Highlighted" parent="CppKeyboardButton.Material.Black.Digit">
+        <item name="android:background">@drawable/material_button_black_lighter</item>
+    </style>
+
+    <style name="CppKeyboardButton.Material.Black.Operation" parent="CppKeyboardButton.Material.Digit">
+        <item name="android:background">@drawable/material_button_deep_blue</item>
+        <item name="directionTextAlpha">0.7</item>
+    </style>
+
+    <style name="CppKeyboardButton.Material.Black.Operation.Highlighted" parent="CppKeyboardButton.Material.Black.Operation">
+        <item name="android:background">@drawable/material_button_deep_blue_lighter</item>
+    </style>
+
+    <style name="CppKeyboardButton.Material.Black.Control" parent="CppKeyboardButton.Material.Black.Digit" />
+
+    <style name="Cpp.Theme.Material.Black" parent="Cpp.Theme">
+        <item name="android:windowBackground">@color/grey_965</item>
+        <item name="cpp_editor_bg">@color/grey_965</item>
+        <item name="cpp_fab_bg">@color/deep_blue_900</item>
+        <item name="cpp_button_style_digit">@style/CppKeyboardButton.Material.Black.Digit</item>
+        <item name="cpp_button_style_control">@style/CppKeyboardButton.Material.Black.Digit</item>
+        <item name="cpp_button_style_control_highlighted">@style/CppKeyboardButton.Material.Black.Digit.Highlighted</item>
+        <item name="cpp_button_style_operation">@style/CppKeyboardButton.Material.Black.Operation</item>
+        <item name="cpp_button_style_operation_highlighted">@style/CppKeyboardButton.Material.Black.Operation.Highlighted</item>
+    </style>
+
+    <style name="Cpp.Theme.Material.Black.Dialog" parent="Cpp.Theme.Dialog">
+        <item name="cpp_editor_bg">@color/grey_965</item>
+        <item name="cpp_fab_bg">@color/deep_blue_900</item>
+        <item name="cpp_button_style_digit">@style/CppKeyboardButton.Material.Black.Digit</item>
+        <item name="cpp_button_style_control">@style/CppKeyboardButton.Material.Black.Digit</item>
+        <item name="cpp_button_style_control_highlighted">@style/CppKeyboardButton.Material.Black.Digit.Highlighted</item>
+        <item name="cpp_button_style_operation">@style/CppKeyboardButton.Material.Black.Operation</item>
+        <item name="cpp_button_style_operation_highlighted">@style/CppKeyboardButton.Material.Black.Operation.Highlighted</item>
+    </style>
+
+    <style name="Cpp.Theme.Material.Black.Dialog.Alert" parent="Cpp.Theme.Dialog.Alert">
+        <item name="cpp_editor_bg">@color/grey_965</item>
+        <item name="cpp_fab_bg">@color/deep_blue_900</item>
+        <item name="cpp_button_style_digit">@style/CppKeyboardButton.Material.Black.Digit</item>
+        <item name="cpp_button_style_control">@style/CppKeyboardButton.Material.Black.Digit</item>
+        <item name="cpp_button_style_control_highlighted">@style/CppKeyboardButton.Material.Black.Digit.Highlighted</item>
+        <item name="cpp_button_style_operation">@style/CppKeyboardButton.Material.Black.Operation</item>
+        <item name="cpp_button_style_operation_highlighted">@style/CppKeyboardButton.Material.Black.Operation.Highlighted</item>
+    </style>
+
+    <style name="Cpp.Theme.Material.Black.Calculator" parent="Cpp.Theme.Material.Black">
+        <item name="android:windowAnimationStyle">@null</item>
+    </style>
+
+</resources>

app/src/main/res/xml/preferences_appearance.xml

@@ -35,8 +35,6 @@
         a:title="@string/cpp_prefs_vibrate_on_keypress" />
 
     <ListPreference
-        a:entries="@array/p_theme_names"
-        a:entryValues="@array/p_theme_values"
         a:key="gui.theme"
         a:title="@string/cpp_theme" />