feat: full-featured Android app — not just public view

Rewrote the Android WebView app to load the entire meal-tracker
web application, not just the public sharing page:

- User configures their server base URL (e.g. https://meals.example.com)
- Full login/register, dashboard, meal responses, history, settings
- Cookie/session support — login persists across app restarts
- Dynamic toolbar title from page
- 'Clear Data' button in settings to wipe cookies/cache/sessions
- Server URL auto-normalized (trailing slash stripped, https:// added)
- Back button navigates within WebView history
- Swipe-to-refresh, loading bar, network error handling

android/app/src/main/java/com/mealtracker/app/MainActivity.java

@@ -9,7 +9,7 @@ import android.net.NetworkInfo;
 import android.os.Bundle;
 import android.view.KeyEvent;
 import android.view.View;
-import android.view.inputmethod.EditorInfo;
+import android.webkit.CookieManager;
 import android.webkit.WebChromeClient;
 import android.webkit.WebResourceError;
 import android.webkit.WebResourceRequest;
@@ -29,12 +29,14 @@ import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 public class MainActivity extends AppCompatActivity {
 
     private static final String PREFS_NAME = "mealtracker_prefs";
-    private static final String KEY_PUBLIC_URL = "public_url";
+    private static final String KEY_SERVER_URL = "server_url";
 
     private WebView webView;
     private SwipeRefreshLayout swipeRefresh;
     private ProgressBar progressBar;
     private TextView errorView;
+    private TextView toolbarTitle;
+    private String serverUrl;
     private String currentUrl;
 
     @SuppressLint("SetJavaScriptEnabled")
@@ -47,6 +49,7 @@ public class MainActivity extends AppCompatActivity {
         swipeRefresh = findViewById(R.id.swipe_refresh);
         progressBar = findViewById(R.id.progress_bar);
         errorView = findViewById(R.id.error_view);
+        toolbarTitle = findViewById(R.id.toolbar_title);
         ImageButton btnSettings = findViewById(R.id.btn_settings);
         ImageButton btnRefresh = findViewById(R.id.btn_refresh);
 
@@ -56,12 +59,13 @@ public class MainActivity extends AppCompatActivity {
         btnRefresh.setOnClickListener(v -> webView.reload());
         btnSettings.setOnClickListener(v -> showSettingsDialog());
 
-        // Load saved URL or show setup
         SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
-        String savedUrl = prefs.getString(KEY_PUBLIC_URL, "");
-        if (!savedUrl.isEmpty()) {
-            loadUrl(savedUrl);
+        serverUrl = prefs.getString(KEY_SERVER_URL, "");
+        if (!serverUrl.isEmpty()) {
+            loadUrl(serverUrl);
+            toolbarTitle.setText(getString(R.string.app_name));
         } else {
+            toolbarTitle.setText(R.string.app_name);
             showSettingsDialog();
         }
     }
@@ -71,6 +75,7 @@ public class MainActivity extends AppCompatActivity {
         WebSettings settings = webView.getSettings();
         settings.setJavaScriptEnabled(true);
         settings.setDomStorageEnabled(true);
+        settings.setDatabaseEnabled(true);
         settings.setUseWideViewPort(true);
         settings.setLoadWithOverviewMode(true);
         settings.setSupportZoom(true);
@@ -78,12 +83,22 @@ public class MainActivity extends AppCompatActivity {
         settings.setDisplayZoomControls(false);
         settings.setCacheMode(WebSettings.LOAD_DEFAULT);
         settings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
+        settings.setAllowFileAccess(false);
+        settings.setSaveFormData(true);
+
+        // Accept all cookies so login sessions persist
+        CookieManager.getInstance().setAcceptCookie(true);
+        CookieManager.getInstance().setAcceptThirdPartyCookies(webView, true);
+
+        String ua = settings.getUserAgentString();
+        settings.setUserAgentString(ua + " MealTrackerApp/1.0");
 
         webView.setWebViewClient(new WebViewClient() {
             @Override
             public void onPageStarted(WebView view, String url, Bitmap favicon) {
                 progressBar.setVisibility(View.VISIBLE);
                 errorView.setVisibility(View.GONE);
+                webView.setVisibility(View.VISIBLE);
             }
 
             @Override
@@ -111,8 +126,9 @@ public class MainActivity extends AppCompatActivity {
 
             @Override
             public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
+                String url = request.getUrl().toString();
                 // Keep all navigation inside the WebView
-                view.loadUrl(request.getUrl().toString());
+                view.loadUrl(url);
                 return true;
             }
         });
@@ -125,17 +141,24 @@ public class MainActivity extends AppCompatActivity {
                     swipeRefresh.setRefreshing(false);
                 }
             }
+
+            @Override
+            public void onReceivedTitle(WebView view, String title) {
+                if (title != null && !title.isEmpty() && !title.startsWith("http")) {
+                    toolbarTitle.setText(title);
+                }
+            }
         });
 
-        // Retry on error tap
         errorView.setOnClickListener(v -> {
-            if (currentUrl != null) {
-                loadUrl(currentUrl);
+            if (serverUrl != null) {
+                loadUrl(serverUrl);
             }
         });
     }
 
     private void loadUrl(String url) {
+        serverUrl = url;
         currentUrl = url;
         errorView.setVisibility(View.GONE);
         webView.setVisibility(View.VISIBLE);
@@ -151,32 +174,61 @@ public class MainActivity extends AppCompatActivity {
         TextView hintView = dialogView.findViewById(R.id.url_hint);
 
         SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
-        String savedUrl = prefs.getString(KEY_PUBLIC_URL, "");
+        String savedUrl = prefs.getString(KEY_SERVER_URL, "");
         urlInput.setText(savedUrl);
-
         hintView.setText(R.string.url_hint_text);
 
         builder.setView(dialogView);
         builder.setPositiveButton(R.string.save, (dialog, which) -> {
             String url = urlInput.getText().toString().trim();
             if (!url.isEmpty()) {
+                // Normalize: strip trailing slashes, auto-add https://
+                url = url.replaceAll("/+$", "");
                 if (!url.startsWith("http://") && !url.startsWith("https://")) {
                     url = "https://" + url;
                 }
-                prefs.edit().putString(KEY_PUBLIC_URL, url).apply();
+                prefs.edit().putString(KEY_SERVER_URL, url).apply();
                 loadUrl(url);
                 Toast.makeText(this, R.string.url_saved, Toast.LENGTH_SHORT).show();
             } else {
                 Toast.makeText(this, R.string.url_empty, Toast.LENGTH_SHORT).show();
             }
         });
-        builder.setNegativeButton(R.string.cancel, null);
+        builder.setNegativeButton(R.string.cancel, (dialog, which) -> {
+            if (serverUrl == null || serverUrl.isEmpty()) {
+                finish();
+            }
+        });
+        builder.setNeutralButton(R.string.clear_data, (dialog, which) -> {
+            clearAllData();
+            prefs.edit().remove(KEY_SERVER_URL).apply();
+            serverUrl = null;
+            webView.loadUrl("about:blank");
+            webView.setVisibility(View.GONE);
+            errorView.setText(R.string.server_not_configured);
+            errorView.setVisibility(View.VISIBLE);
+            toolbarTitle.setText(R.string.app_name);
+            Toast.makeText(this, R.string.data_cleared, Toast.LENGTH_SHORT).show();
+        });
         builder.setCancelable(false);
         builder.show();
     }
 
+    private void clearAllData() {
+        webView.clearCache(true);
+        webView.clearHistory();
+        webView.clearFormData();
+        CookieManager.getInstance().removeAllCookies(null);
+        CookieManager.getInstance().flush();
+        // Clear WebView storage
+        webView.clearSslPreferences();
+        // Nuke DOM/local storage
+        webView.evaluateJavascript("localStorage.clear(); sessionStorage.clear();", null);
+    }
+
     private boolean isNetworkAvailable() {
         ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
+        if (cm == null) return false;
         NetworkInfo info = cm.getActiveNetworkInfo();
         return info != null && info.isConnected();
     }
@@ -189,4 +241,16 @@ public class MainActivity extends AppCompatActivity {
         }
         return super.onKeyDown(keyCode, event);
     }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        webView.saveState(outState);
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        webView.restoreState(savedInstanceState);
+    }
 }

android/app/src/main/res/layout/activity_main.xml

@@ -20,16 +20,26 @@
                 android:id="@+id/toolbar"
                 android:layout_width="match_parent"
                 android:layout_height="?attr/actionBarSize"
-                app:title="@string/app_name"
-                app:titleTextColor="@android:color/white"
-                android:background="@color/colorPrimary">
+                android:background="@color/colorPrimary"
+                app:contentInsetStart="12dp">
+
+                <TextView
+                    android:id="@+id/toolbar_title"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="@string/app_name"
+                    android:textColor="@android:color/white"
+                    android:textSize="18sp"
+                    android:maxLines="1"
+                    android:ellipsize="end"
+                    android:gravity="center_vertical" />
 
                 <ImageButton
                     android:id="@+id/btn_refresh"
                     android:layout_width="40dp"
                     android:layout_height="40dp"
                     android:layout_gravity="end"
-                    android:layout_marginEnd="4dp"
                     android:src="@drawable/ic_refresh"
                     android:background="?attr/selectableItemBackgroundBorderless"
                     android:contentDescription="@string/refresh" />
@@ -39,7 +49,6 @@
                     android:layout_width="40dp"
                     android:layout_height="40dp"
                     android:layout_gravity="end"
-                    android:layout_marginEnd="4dp"
                     android:src="@drawable/ic_settings"
                     android:background="?attr/selectableItemBackgroundBorderless"
                     android:contentDescription="@string/settings" />

android/app/src/main/res/layout/dialog_settings.xml

@@ -12,18 +12,19 @@
         android:text="@string/url_label"
         android:textSize="14sp"
         android:textColor="@android:color/darker_gray"
-        android:paddingBottom="4dp" />
+        android:paddingBottom="6dp" />
 
     <EditText
         android:id="@+id/url_input"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:inputType="textUri"
-        android:hint="https://meals.example.com/public/..."
+        android:hint="https://meals.example.com"
         android:padding="12dp"
         android:background="@android:drawable/edit_text"
         android:textSize="14sp"
-        android:importantForAutofill="no" />
+        android:importantForAutofill="no"
+        android:autofillHints="no" />
 
     <TextView
         android:id="@+id/url_hint"

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

@@ -3,13 +3,16 @@
     <string name="app_name">Meal Tracker</string>
     <string name="refresh">Refresh</string>
     <string name="settings">Settings</string>
-    <string name="settings_title">Public URL</string>
-    <string name="url_label">Enter the public sharing URL for your household:</string>
-    <string name="url_hint_text">Paste the link your household admin shared with you. It looks like:\nhttps://.../public/abc123...</string>
+    <string name="settings_title">Server Configuration</string>
+    <string name="url_label">Enter your Meal Tracker server URL:</string>
+    <string name="url_hint_text">This is the URL where your household\'s meal tracker is hosted.\nExample: https://meals.example.com</string>
     <string name="save">Save</string>
     <string name="cancel">Cancel</string>
-    <string name="url_saved">URL saved</string>
-    <string name="url_empty">Please enter a URL</string>
+    <string name="clear_data">Clear Data</string>
+    <string name="url_saved">Connected to server</string>
+    <string name="url_empty">Please enter a server URL</string>
     <string name="error_no_network">No network connection.\nTap to retry.</string>
-    <string name="error_load_failed">Could not load the page.\nTap to retry.</string>
+    <string name="error_load_failed">Could not reach the server.\nCheck the URL and tap to retry.</string>
+    <string name="server_not_configured">No server configured.\nTap the gear icon to set up.</string>
+    <string name="data_cleared">Local data cleared</string>
 </resources>