Make number of recent calls configurable

app/src/main/java/dummydomain/yetanothercallblocker/MainActivity.java

@@ -219,7 +219,8 @@ public class MainActivity extends AppCompatActivity {
                 = new AsyncTask<Void, Void, List<CallLogItem>>() {
             @Override
             protected List<CallLogItem> doInBackground(Void... voids) {
-                List<CallLogItem> items = CallLogHelper.getRecentCalls(MainActivity.this, 20);
+                List<CallLogItem> items = CallLogHelper.getRecentCalls(
+                        MainActivity.this, settings.getNumberOfRecentCalls());
 
                 for (CallLogItem item : items) {
                     if (DatabaseSingleton.getCommunityDatabase().isOperational()) {

app/src/main/java/dummydomain/yetanothercallblocker/Settings.java

@@ -12,6 +12,7 @@ public class Settings extends GenericSettings {
     public static final String PREF_INCOMING_CALL_NOTIFICATIONS = "incomingCallNotifications";
     public static final String PREF_BLOCK_CALLS = "blockCalls";
     public static final String PREF_USE_CONTACTS = "useContacts";
+    public static final String PREF_NUMBER_OF_RECENT_CALLS = "numberOfRecentCalls";
     public static final String PREF_NOTIFICATIONS_KNOWN = "showNotificationsForKnownCallers";
     public static final String PREF_NOTIFICATIONS_UNKNOWN = "showNotificationsForUnknownCallers";
     public static final String PREF_LAST_UPDATE_TIME = "lastUpdateTime";
@@ -83,6 +84,14 @@ public class Settings extends GenericSettings {
         setBoolean(PREF_USE_CONTACTS, use);
     }
 
+    public int getNumberOfRecentCalls() {
+        return getInt(PREF_NUMBER_OF_RECENT_CALLS, 20);
+    }
+
+    public void setNumberOfRecentCalls(int number) {
+        setInt(PREF_NUMBER_OF_RECENT_CALLS, number);
+    }
+
     public boolean getNotificationsForKnownCallers() {
         return getBoolean(PREF_NOTIFICATIONS_KNOWN);
     }

app/src/main/java/dummydomain/yetanothercallblocker/preference/IntEditTextPreference.java

@@ -0,0 +1,54 @@
+package dummydomain.yetanothercallblocker.preference;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.text.InputType;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+
+import androidx.preference.EditTextPreference;
+
+public class IntEditTextPreference extends EditTextPreference {
+
+    public IntEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr,
+                                 int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        setListener();
+    }
+
+    public IntEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        setListener();
+    }
+
+    public IntEditTextPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setListener();
+    }
+
+    public IntEditTextPreference(Context context) {
+        super(context);
+        setListener();
+    }
+
+    @Override
+    protected Object onGetDefaultValue(TypedArray a, int index) {
+        return a.getInt(index, 0);
+    }
+
+    @Override
+    protected void onSetInitialValue(Object defaultValue) {
+        int defaultInt = defaultValue != null ? (int) defaultValue : 0;
+        setText(String.valueOf(getPersistedInt(defaultInt)));
+    }
+
+    @Override
+    protected boolean persistString(String value) {
+        return persistInt(!TextUtils.isEmpty(value) ? Integer.parseInt(value) : 0);
+    }
+
+    private void setListener() {
+        setOnBindEditTextListener(editText -> editText.setInputType(InputType.TYPE_CLASS_NUMBER));
+    }
+
+}

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

@@ -75,6 +75,8 @@
     <string name="notification_background_operation">Выполняется процесс в фоне…</string>
     <string name="use_contacts">Отображать имена контактов</string>
     <string name="use_contacts_summary">Номера из телефонной книги никогда не блокируются, и имя контакта отображается рядом/вместо номера</string>
+    <string name="number_of_recent_calls">Кол-во недавних вызовов</string>
+    <string name="number_of_recent_calls_summary">Количество недавних вызовов на основном экране</string>
     <string name="notification_incoming_call_contact">Контакт</string>
     <string name="open_settings_activity">Настройки</string>
     <string name="title_settings_activity">Настройки</string>

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

@@ -98,6 +98,8 @@
     <string name="auto_updates_summary">Automatically receive daily DB updates (these are incremental/delta updates, so they consume very little traffic)</string>
     <string name="use_contacts">Use contacts</string>
     <string name="use_contacts_summary">Numbers present in the phone book are never blocked and the contact name is displayed next to/instead of a number throughout the app</string>
+    <string name="number_of_recent_calls">Number of recent calls</string>
+    <string name="number_of_recent_calls_summary">The number of recent calls to display on the main screen</string>
 
     <string name="settings_screen_advanced">Advanced settings</string>
     <string name="settings_category_country_codes">Country codes</string>

app/src/main/res/xml/root_preferences.xml

@@ -15,6 +15,11 @@
             app:key="useContacts"
             app:summary="@string/use_contacts_summary"
             app:title="@string/use_contacts" />
+        <dummydomain.yetanothercallblocker.preference.IntEditTextPreference
+            app:defaultValue="20"
+            app:key="numberOfRecentCalls"
+            app:summary="@string/number_of_recent_calls_summary"
+            app:title="@string/number_of_recent_calls" />
     </PreferenceCategory>
 
     <PreferenceCategory app:title="@string/settings_category_call_blocking">