general preferences

app/build.gradle

@@ -5,7 +5,8 @@ plugins {
 dependencies {
     implementation 'androidx.core:core:1.9.0'
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
-    //implementation 'org.ini4j:ini4j:0.5.4'
+    // implementation 'org.ini4j:ini4j:0.5.4'
+    // implementation 'org.apache.commons:commons-configuration2:2.7'
 }
 
 android {

app/src/main/java/org/purplei2p/i2pd/MyPreferenceActivity.java

@@ -6,8 +6,15 @@ import android.preference.EditTextPreference;
 import android.preference.ListPreference;
 import android.preference.PreferenceActivity;
 
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.Properties;
+
 public class MyPreferenceActivity extends PreferenceActivity {
 
+    private static final String CONFIG_FILE_PATH = "/sdcard/i2pd/i2pd.conf";
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -15,12 +22,91 @@ public class MyPreferenceActivity extends PreferenceActivity {
 
         // Main Category
         ListPreference logLevel = (ListPreference) findPreference("logLevelPreference");
+
+        logLevel.setOnPreferenceChangeListener((preference, newValue) -> {
+            // Modify properties
+            Properties properties = readProperties();
+            properties.setProperty("log", (String) newValue);
+            // Save modified properties
+            writeProperties(properties);
+            return true;
+        });
+
         CheckBoxPreference ipv4Enable = (CheckBoxPreference) findPreference("ipv4EnablePreference");
+        ipv4Enable.setOnPreferenceChangeListener((preference, newValue) -> {
+            // Modify properties
+            Properties properties = readProperties();
+            // Convert Object to boolean
+            boolean newValueBoolean = (boolean) newValue;
+            properties.setProperty("ipv4", String.valueOf(newValueBoolean)); // assuming "ipv4" is the key
+            // Save modified properties
+            writeProperties(properties);
+            return true;
+        });
         CheckBoxPreference ipv6Enable = (CheckBoxPreference) findPreference("ipv6EnablePreference");
+        ipv6Enable.setOnPreferenceChangeListener((preference, newValue) -> {
+            // Modify properties
+            Properties properties = readProperties();
+            // Convert Object to boolean
+            boolean newValueBoolean = (boolean) newValue;
+            properties.setProperty("ipv6", String.valueOf(newValueBoolean)); // assuming "ipv4" is the key
+            // Save modified properties
+            writeProperties(properties);
+            return true;
+        });
+// Example for portPreference (EditTextPreference)
         EditTextPreference portPreference = (EditTextPreference) findPreference("portPreference");
+
+        portPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+            // Modify properties
+            Properties properties = readProperties();
+            // Convert Object to String (assuming "port" is the key)
+            String newValueString = newValue.toString();
+            properties.setProperty("port", newValueString);
+            // Save modified properties
+            writeProperties(properties);
+            return true;
+        });
+
+        // Example for bandwidthPreference (ListPreference)
         ListPreference bandwidthPreference = (ListPreference) findPreference("bandwidthPreference");
+
+        bandwidthPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+            // Modify properties
+            Properties properties = readProperties();
+            // Convert Object to String (assuming "bandwidth" is the key)
+            String newValueString = newValue.toString();
+            properties.setProperty("bandwidth", newValueString);
+            // Save modified properties
+            writeProperties(properties);
+            return true;
+        });
+// Example for noTransitPreference (CheckBoxPreference)
         CheckBoxPreference noTransitPreference = (CheckBoxPreference) findPreference("noTransitPreference");
+
+        noTransitPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+            // Modify properties
+            Properties properties = readProperties();
+            // Convert Object to boolean (assuming "noTransit" is the key)
+            boolean newValueBoolean = (boolean) newValue;
+            properties.setProperty("notransit", String.valueOf(newValueBoolean));
+            // Save modified properties
+            writeProperties(properties);
+            return true;
+        });
         CheckBoxPreference floodfillPreference = (CheckBoxPreference) findPreference("floodfillPreference");
+        floodfillPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+            // Modify properties
+            Properties properties = readProperties();
+            // Convert Object to boolean (assuming "noTransit" is the key)
+            boolean newValueBoolean = (boolean) newValue;
+            properties.setProperty("floodfill", String.valueOf(newValueBoolean));
+            // Save modified properties
+            writeProperties(properties);
+            return true;
+        });
+        // ^^^ general
+        // vvv not general (sections name)
         CheckBoxPreference ssuPreference = (CheckBoxPreference) findPreference("ssuPreference");
 
         // NTCP2 Category
@@ -59,4 +145,22 @@ public class MyPreferenceActivity extends PreferenceActivity {
         // Limits Category
         EditTextPreference transitTunnelEdit = (EditTextPreference) findPreference("transitTunnelPreference");
     }
+
+    private Properties readProperties() {
+        Properties properties = new Properties();
+        try (FileReader reader = new FileReader(CONFIG_FILE_PATH)) {
+            properties.load(reader);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return properties;
+    }
+
+    private void writeProperties(Properties properties) {
+        try (FileWriter writer = new FileWriter(CONFIG_FILE_PATH)) {
+            properties.store(writer, "Updated properties");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
 }