Add warning if automatic time is disabled

Closes #777

app/src/main/java/org/shadowice/flocke/andotp/Activities/MainActivity.java

@@ -47,6 +47,8 @@ import androidx.recyclerview.widget.RecyclerView;
 import androidx.appcompat.widget.SearchView;
 import androidx.appcompat.widget.Toolbar;
 import androidx.recyclerview.widget.ItemTouchHelper;
+
+import android.provider.Settings;
 import android.text.TextUtils;
 import android.view.KeyEvent;
 import android.view.Menu;
@@ -67,6 +69,7 @@ import com.leinardi.android.speeddial.SpeedDialActionItem;
 import com.leinardi.android.speeddial.SpeedDialView;
 
 import org.shadowice.flocke.andotp.Database.Entry;
+import org.shadowice.flocke.andotp.Dialogs.HideableDialog;
 import org.shadowice.flocke.andotp.R;
 import org.shadowice.flocke.andotp.Utilities.Constants;
 import org.shadowice.flocke.andotp.Utilities.EncryptionHelper;
@@ -173,6 +176,13 @@ public class MainActivity extends BaseActivity
         adapter.filterByTags(tagsDrawerAdapter.getActiveTags());
     }
 
+    private void checkAutomaticTime() {
+        int autoTime = Settings.Global.getInt(getContentResolver(), Settings.Global.AUTO_TIME, 0);
+
+        if (autoTime == 0)
+            HideableDialog.ShowHidableDialog(this, R.string.dialog_title_auto_time, R.string.dialog_msg_auto_time, R.string.settings_key_dialog_hide_auto_time);
+    }
+
     // Initialize the main application
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -210,6 +220,8 @@ public class MainActivity extends BaseActivity
            showFirstTimeWarning();
         }
 
+        checkAutomaticTime();
+
         speedDial = findViewById(R.id.speedDial);
         speedDial.inflate(R.menu.menu_fab);
 

app/src/main/java/org/shadowice/flocke/andotp/Dialogs/HideableDialog.java

@@ -0,0 +1,65 @@
+package org.shadowice.flocke.andotp.Dialogs;
+
+import android.content.Context;
+import android.view.View;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatDialog;
+
+import org.shadowice.flocke.andotp.R;
+import org.shadowice.flocke.andotp.Utilities.Settings;
+import org.shadowice.flocke.andotp.Utilities.Tools;
+
+public class HideableDialog extends AppCompatDialog
+    implements View.OnClickListener, CompoundButton.OnCheckedChangeListener {
+
+    private final Settings settings;
+    private final int hideSettingId;
+
+    public HideableDialog(@NonNull Context context, int titleId, int msgId, int hideSettingId) {
+        super(context, Tools.getThemeResource(context, R.attr.dialogTheme));
+
+        this.settings = new Settings(context);
+        this.hideSettingId = hideSettingId;
+
+        setTitle(titleId);
+        setContentView(R.layout.dialog_dont_show_again);
+
+        TextView content = findViewById(R.id.dialogContent);
+        CheckBox dontShowAgain = findViewById(R.id.dontShowAgain);
+        Button buttonOk = findViewById(R.id.buttonOk);
+
+        assert content != null;
+        assert dontShowAgain != null;
+        assert buttonOk != null;
+
+        content.setText(msgId);
+
+        dontShowAgain.setOnCheckedChangeListener(this);
+        buttonOk.setOnClickListener(this);
+    }
+
+    @Override
+    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
+        if (settings != null && hideSettingId > 0)
+            settings.setBoolean(hideSettingId, b);
+    }
+
+    @Override
+    public void onClick(View view) {
+        dismiss();
+    }
+
+    public static void ShowHidableDialog(Context context, int titleId, int msgId, int hideSettingId) {
+        Settings settings = new Settings(context);
+
+        if (!settings.getBoolean(hideSettingId, false)) {
+            HideableDialog dialog = new HideableDialog(context, titleId, msgId, hideSettingId);
+            dialog.show();
+        }
+    }
+}

app/src/main/java/org/shadowice/flocke/andotp/Utilities/Settings.java

@@ -129,7 +129,7 @@ public class Settings {
         return settings.getString(getResString(keyId), defaultValue);
     }
 
-    private boolean getBoolean(int keyId, boolean defaultValue) {
+    public boolean getBoolean(int keyId, boolean defaultValue) {
         return settings.getBoolean(getResString(keyId), defaultValue);
     }
 
@@ -151,7 +151,7 @@ public class Settings {
         return new HashSet<>(settings.getStringSet(getResString(keyId), defaultValue));
     }
 
-    private void setBoolean(int keyId, boolean value) {
+    public void setBoolean(int keyId, boolean value) {
         settings.edit()
                 .putBoolean(getResString(keyId), value)
                 .apply();

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

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginTop="@dimen/activity_margin"
+    android:layout_marginStart="@dimen/activity_margin_small"
+    android:layout_marginEnd="@dimen/activity_margin_small"
+    android:orientation="vertical"
+    android:background="@null"
+    android:padding="@dimen/activity_margin">
+
+    <TextView
+        android:id="@+id/dialogContent"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"/>
+
+    <CheckBox
+        android:id="@+id/dontShowAgain"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:layout_marginTop="@dimen/activity_margin"
+        android:text="@string/dialog_hint_dont_show_again"/>
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="end">
+
+        <Button
+            android:id="@+id/buttonOk"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            style="@style/Widget.AppCompat.Button.ButtonBar.AlertDialog"
+            android:text="@android:string/ok" />
+
+    </LinearLayout>
+
+</LinearLayout>

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

@@ -75,6 +75,8 @@
     <string name="settings_key_last_used_dialog_shown" translatable="false">pref_last_used_dialog_shown</string>
     <string name="settings_key_android21_deprecation_notice_shown" translatable="false">pref_android21_deprecation_notice_shown</string>    <!-- Deprecated -->
 
+    <string name="settings_key_dialog_hide_auto_time" translatable="false">pref_dialog_hide_auto_time</string>
+
     <!-- Default values -->
     <integer name="settings_default_tap_to_reveal_timeout">30</integer>
     <integer name="settings_default_auth_inactivity_delay">30</integer>

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

@@ -98,6 +98,7 @@
     <string name="dialog_title_pin">PIN</string>
 
     <string name="dialog_title_enter_password">Enter password</string>
+    <string name="dialog_title_auto_time">Automatic time</string>
 
     <string name="dialog_label_enter_password">Enter password</string>
     <string name="dialog_label_confirm_password">Confirm password</string>
@@ -113,6 +114,12 @@
         <b>Any entries that are added will be lost.</b>\n\nTo continue using andOTP, you can go
         to the <b>Settings</b> and switch the <b>Database encryption</b> to <b>Password / PIN</b>.</string>
 
+    <string name="dialog_msg_auto_time">Please enable the <b>Automatic date &amp; time</b> option in
+        your phones <b>Settings</b> to ensure the correct generation of time-based
+        one-time-passwords (TOTP).</string>
+
+    <string name="dialog_hint_dont_show_again">Don\'t show this message again.</string>
+
     <!-- Shortcuts -->
     <string name="shortcut_name_scan_qr">Scan QR code</string>
     <string name="shortcut_name_import_qr">Import QR code</string>