Cache setting values

Clover/app/src/main/java/org/floens/chan/core/settings/BooleanSetting.java

@@ -3,6 +3,9 @@ package org.floens.chan.core.settings;
 import android.content.SharedPreferences;
 
 public class BooleanSetting extends Setting<Boolean> {
+    private boolean hasCached = false;
+    private boolean cached;
+
     public BooleanSetting(SharedPreferences sharedPreferences, String key, Boolean def) {
         super(sharedPreferences, key, def);
     }
@@ -13,13 +16,20 @@ public class BooleanSetting extends Setting<Boolean> {
 
     @Override
     public Boolean get() {
-        return sharedPreferences.getBoolean(key, def);
+        if (hasCached) {
+            return cached;
+        } else {
+            cached = sharedPreferences.getBoolean(key, def);
+            hasCached = true;
+            return cached;
+        }
     }
 
     @Override
     public void set(Boolean value) {
         if (!value.equals(get())) {
             sharedPreferences.edit().putBoolean(key, value).apply();
+            cached = value;
             onValueChanged();
         }
     }

Clover/app/src/main/java/org/floens/chan/core/settings/StringSetting.java

@@ -3,6 +3,9 @@ package org.floens.chan.core.settings;
 import android.content.SharedPreferences;
 
 public class StringSetting extends Setting<String> {
+    private boolean hasCached = false;
+    private String cached;
+
     public StringSetting(SharedPreferences sharedPreferences, String key, String def) {
         super(sharedPreferences, key, def);
     }
@@ -13,13 +16,20 @@ public class StringSetting extends Setting<String> {
 
     @Override
     public String get() {
-        return sharedPreferences.getString(key, def);
+        if (hasCached) {
+            return cached;
+        } else {
+            cached = sharedPreferences.getString(key, def);
+            hasCached = true;
+            return cached;
+        }
     }
 
     @Override
     public void set(String value) {
         if (!value.equals(get())) {
             sharedPreferences.edit().putString(key, value).apply();
+            cached = value;
             onValueChanged();
         }
     }