Move app files to root folder

app/src/main/java/com/dosse/airpods/ui/SettingsActivity.java

@@ -0,0 +1,55 @@
+package com.dosse.airpods.ui;
+
+import android.os.Bundle;
+import android.widget.Toast;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceFragmentCompat;
+
+import com.dosse.airpods.BuildConfig;
+import com.dosse.airpods.R;
+import com.dosse.airpods.receivers.StartupReceiver;
+
+public class SettingsActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate (Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_settings);
+        getSupportFragmentManager()
+                .beginTransaction()
+                .replace(R.id.settings_container, new SettingsFragment())
+                .commit();
+    }
+
+    public static class SettingsFragment extends PreferenceFragmentCompat {
+
+        @Override
+        public void onCreatePreferences (Bundle savedInstanceState, String rootKey) {
+            setPreferencesFromResource(R.xml.preference_screen, rootKey);
+
+            getPreference("batterySaver").setOnPreferenceClickListener(preference -> {
+                StartupReceiver.restartPodsService(requireContext());
+                return true;
+            });
+
+            getPreference("restartService").setOnPreferenceClickListener(preference -> {
+                StartupReceiver.restartPodsService(requireContext());
+                return true;
+            });
+
+            getPreference("about").setSummary(String.format("%s v%s", getString(R.string.app_name), BuildConfig.VERSION_NAME));
+
+            getPreference("donate").setOnPreferenceClickListener(preference -> {
+                Toast.makeText(requireContext(), "❤️", Toast.LENGTH_SHORT).show();
+                return false;
+            });
+        }
+
+        private Preference getPreference (String key) {
+            return getPreferenceManager().findPreference(key);
+        }
+
+    }
+
+}