Coder Agent: Fix an Android SDK bug where tapping the chat text input field causes the chat UI to crash into a lo

gleap/src/main/AndroidManifest.xml

@@ -7,7 +7,8 @@
     <application>
         <activity
             android:name="io.gleap.GleapMainActivity"
-            android:configChanges="orientation|screenSize"
+            android:configChanges="orientation|screenSize|keyboard|keyboardHidden|screenLayout|smallestScreenSize|uiMode|navigation|density"
+            android:windowSoftInputMode="adjustResize"
             android:theme="@style/AppTheme.TranslucentBG" />
     </application>
 

gleap/src/main/java/io/gleap/GleapMainActivity.java

@@ -7,6 +7,7 @@
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
+import android.content.res.Configuration;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Color;
@@ -197,6 +198,11 @@ public void handleOnBackPressed() {
 
             this.requestWindowFeature(Window.FEATURE_NO_TITLE);
             try {
+                // SOFT_INPUT_ADJUST_RESIZE is deprecated on API 30+ but still honoured
+                // for apps that target SDK < 35 (this SDK targets 33).  Setting it
+                // unconditionally ensures the window shrinks for the keyboard on every
+                // device – including Android 16 / Samsung One UI 8.0 – so the WebView
+                // content remains visible without needing a separate IME-insets handler.
                 getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
                 if (getSupportActionBar() != null) {
                     getSupportActionBar().hide();
@@ -214,25 +220,24 @@ public void handleOnBackPressed() {
 
                 final FrameLayout webViewContainer = findViewById(R.id.webview_container);
 
+                // Handle system-bar insets (status bar, navigation bar) so the
+                // WebView content is not drawn behind them.  We intentionally
+                // do NOT include IME insets here: the keyboard resize is fully
+                // handled by SOFT_INPUT_ADJUST_RESIZE which shrinks the window
+                // itself.  Adding IME padding on top of that would double-shift
+                // the content -- the root cause of the blank-screen-on-keyboard
+                // bug on Android 16 / Samsung One UI 8.0.
                 ViewCompat.setOnApplyWindowInsetsListener(webViewContainer,
                     (view, insets) -> {
 
-                    // status + navigation bars (stable system bars)
                     Insets bars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
 
-                    // on Android 11+ this is the real keyboard height;
-                    // on older versions it’s 0 – but then the IME is reported as a system‑bar inset
-                    Insets ime  = insets.getInsets(WindowInsetsCompat.Type.ime());
-
-                    int topInset    = bars.top;                       // keep the status‑bar height
-                    int bottomInset = Math.max(bars.bottom, ime.bottom); // choose the larger of nav‑bar or IME
-
                     view.setPadding(view.getPaddingLeft(),
-                                    topInset,
+                                    bars.top,
                                     view.getPaddingRight(),
-                                    bottomInset);
+                                    bars.bottom);
 
-                    return insets;   // DON’T consume – let child views see the same insets
+                    return insets;
                 });
 
                 int backgroundColor = Color.parseColor(GleapConfig.getInstance().getBackgroundColor());
@@ -285,9 +290,19 @@ public void invoke() {
                     @Override
                     public void run() {
                         url += GleapURLGenerator.generateURL();
-                        initBrowser();
                         if (savedInstanceState != null) {
-                            webView.restoreState(savedInstanceState);
+                            // Activity was recreated (e.g. process killed in background).
+                            // Set up WebView clients/settings but skip loading a new URL;
+                            // restoreState will navigate back to the previous page.
+                            initBrowserSettings();
+                            android.webkit.WebBackForwardList restored = webView.restoreState(savedInstanceState);
+                            if (restored == null) {
+                                // restoreState failed — fall back to a full reload.
+                                webView.loadUrl(url);
+                            }
+                        } else {
+                            // Fresh start — initialise everything and load the URL.
+                            initBrowser();
                         }
                     }
                 });
@@ -305,7 +320,20 @@ protected void onSaveInstanceState(Bundle outState) {
     @Override
     protected void onRestoreInstanceState(Bundle savedInstanceState) {
         super.onRestoreInstanceState(savedInstanceState);
-        webView.restoreState(savedInstanceState);
+        // Do NOT call webView.restoreState() here.  The posted runnable in
+        // onCreate already handles restoration after the WebView clients are
+        // wired up via initBrowserSettings().  Calling restoreState() here
+        // would consume the Bundle's WebView state before that runnable
+        // executes, forcing an unnecessary full URL reload every time.
+    }
+
+    @Override
+    public void onConfigurationChanged(@NonNull Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+        // Intentionally empty — we declared the relevant configChanges in the
+        // manifest so the system delivers them here instead of recreating the
+        // activity. This keeps the WebView (and its chat state) alive when the
+        // soft keyboard appears/disappears or the screen layout changes.
     }
 
     @Override
@@ -359,7 +387,12 @@ protected void onDestroy() {
         super.onDestroy();
     }
 
-    private void initBrowser() {
+    /**
+     * Configure WebView settings, clients and JS bridge without loading a URL.
+     * Call this when restoring from saved state so the WebView is properly
+     * wired up before {@code restoreState()} navigates to the previous page.
+     */
+    private void initBrowserSettings() {
         WebSettings settings = webView.getSettings();
         settings.setJavaScriptEnabled(true);
         settings.setDomStorageEnabled(true);
@@ -443,10 +476,16 @@ public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathC
                 }
             }
         });
-        webView.loadUrl(url);
         webView.setVisibility(View.INVISIBLE);
-        settings.setUseWideViewPort(true);
-        settings.setLoadWithOverviewMode(true);
+    }
+
+    /**
+     * Full browser initialisation: configure settings, clients and load the URL.
+     * Used on a fresh start (no saved instance state).
+     */
+    private void initBrowser() {
+        initBrowserSettings();
+        webView.loadUrl(url);
     }
 
     public void askForPermission(String origin, String androidPermission, String webkitPermission, int requestCode) {