Added option to set black background

FAQ.md

@@ -10,7 +10,6 @@ For support on authorizing an account you should consult the documentation of yo
 
 Frequently requested features:
 
-* More themes/black theme: the goal is to keep the app as simple as possible, so no more themes will not be added.
 * Previewing message text in notification/widget: this is not always possible because the message text is initially not downloaded for larger messages.
 * Executing filter rules: filter rules should be executed on the server because a battery powered device with possibly an unstable internet connection is not suitable for this.
 * Widget to read e-mail: widgets do not allow user interaction, so a widget to read e-mail would not be very useful.

app/src/main/java/eu/faircode/email/ActivityBase.java

@@ -34,10 +34,18 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         Log.i(Helper.TAG, "Create " + this.getClass().getName() + " version=" + BuildConfig.VERSION_NAME);
+
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
-        String theme = (Helper.isPro(this) ? prefs.getString("theme", "light") : "light");
+        if (Helper.isPro(this)) {
-        setTheme("light".equals(theme) ? R.style.AppThemeLight : R.style.AppThemeDark);
+            String theme = prefs.getString("theme", null);
+            if ("dark".equals(theme))
+                setTheme(R.style.AppThemeDark);
+            else if ("black".equals(theme))
+                setTheme(R.style.AppThemeBlack);
+        }
+
         prefs.registerOnSharedPreferenceChangeListener(this);
+
         super.onCreate(savedInstanceState);
     }
 
@@ -71,7 +79,8 @@ abstract class ActivityBase extends AppCompatActivity implements SharedPreferenc
         Log.i(Helper.TAG, "Preference " + key + "=" + prefs.getAll().get(key));
         if ("theme".equals(key)) {
             finish();
-            startActivity(getIntent());
+            if (this.getClass().equals(ActivitySetup.class))
+                startActivity(getIntent());
         } else if (!this.getClass().equals(ActivitySetup.class) && ("compact".equals(key) || "debug".equals(key)))
             finish();
     }

app/src/main/java/eu/faircode/email/FragmentSetup.java

@@ -44,6 +44,7 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
+import android.widget.CheckBox;
 import android.widget.CompoundButton;
 import android.widget.ImageButton;
 import android.widget.TextView;
@@ -93,6 +94,7 @@ public class FragmentSetup extends FragmentEx {
     private Button btnNotifications;
 
     private ToggleButton tbDarkTheme;
+    private CheckBox cbBlackTheme;
 
     private Button btnOptions;
 
@@ -144,6 +146,7 @@ public class FragmentSetup extends FragmentEx {
         btnData = view.findViewById(R.id.btnData);
 
         tbDarkTheme = view.findViewById(R.id.tbDarkTheme);
+        cbBlackTheme = view.findViewById(R.id.cbBlackTheme);
         btnOptions = view.findViewById(R.id.btnOptions);
 
         // Wire controls
@@ -226,9 +229,9 @@ public class FragmentSetup extends FragmentEx {
         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
 
         String theme = prefs.getString("theme", "light");
-        boolean dark = "dark".equals(theme);
+        boolean light = "light".equals(theme);
-        tbDarkTheme.setTag(dark);
+        tbDarkTheme.setTag(!light);
-        tbDarkTheme.setChecked(dark);
+        tbDarkTheme.setChecked(!light);
         tbDarkTheme.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton button, boolean checked) {
@@ -247,9 +250,19 @@ public class FragmentSetup extends FragmentEx {
                         fragmentTransaction.commit();
                     }
                 }
+                cbBlackTheme.setVisibility(tbDarkTheme.isChecked() ? View.VISIBLE : View.GONE);
             }
         });
 
+        cbBlackTheme.setChecked("black".equals(theme));
+        cbBlackTheme.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean checked) {
+                prefs.edit().putString("theme", checked ? "black" : "dark").apply();
+            }
+        });
+        cbBlackTheme.setVisibility(tbDarkTheme.isChecked() ? View.VISIBLE : View.GONE);
+
         btnOptions.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {

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

@@ -228,6 +228,16 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/btnNotifications" />
 
+        <CheckBox
+            android:id="@+id/cbBlackTheme"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="9dp"
+            android:text="@string/title_setup_black_background"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tbDarkTheme" />
+
         <Button
             android:id="@+id/btnOptions"
             style="?android:attr/buttonStyleSmall"
@@ -239,6 +249,6 @@
             android:text="@string/title_advanced"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/tbDarkTheme" />
+            app:layout_constraintTop_toBottomOf="@id/cbBlackTheme" />
     </androidx.constraintlayout.widget.ConstraintLayout>
 </ScrollView>

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

@@ -78,6 +78,7 @@
     <string name="title_setup_done">Done</string>
     <string name="title_setup_light_theme">Light theme</string>
     <string name="title_setup_dark_theme">Dark theme</string>
+    <string name="title_setup_black_background">Black background</string>
 
     <string name="title_advanced">Advanced options</string>
     <string name="title_advanced_enabled">Enabled</string>

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

@@ -51,6 +51,11 @@
         <item name="android:buttonStyleToggle">@style/buttonStyleToggle</item>
     </style>
 
+    <style name="AppThemeBlack" parent="AppThemeDark">
+        <item name="android:windowBackground">@android:color/black</item>
+        <item name="colorDrawerBackground">@android:color/black</item>
+    </style>
+
     <style name="Theme.Transparent" parent="Base.Theme.AppCompat">
         <item name="android:windowIsTranslucent">true</item>
         <item name="android:windowBackground">@android:color/transparent</item>