Android: Implement input backend interface

Interface for input-related actions, based off of QtInputDelegate.

Implements all the QtInputDelegate functions called from native code
plus an extra function that allows the native side to get a
QtInputConnectionListener object for QtWindow creation.

Removed some unused functions and unmarked @UsedFromNativeCode in some
that are no longer called from native, but still used from java.

Added QtInputConnectionListener null checks in QtInputConnection, due
to the possibility of a non-existent InputInterface returning a null
QtInputConnectionListener for the QtInputConnection constructor.

Task-number: QTBUG-118874
Change-Id: I8d4cde3e0c735471d0fa30d16db20eb13542cdaa
Reviewed-by: Tinja Paavoseppä <tinja.paavoseppa@qt.io>

src/android/jar/CMakeLists.txt

@@ -45,6 +45,7 @@ set(java_sources
     src/org/qtproject/qt/android/QtAccessibilityInterface.java
     src/org/qtproject/qt/android/QtMenuInterface.java
     src/org/qtproject/qt/android/QtLayoutInterface.java
+    src/org/qtproject/qt/android/QtInputInterface.java
 )
 
 qt_internal_add_jar(Qt${QtBase_VERSION_MAJOR}Android

src/android/jar/src/org/qtproject/qt/android/QtActivityDelegate.java

@@ -65,6 +65,8 @@ class QtActivityDelegate extends QtActivityDelegateBase
                                             (QtMenuInterface)QtActivityDelegate.this);
             BackendRegister.registerBackend(QtLayoutInterface.class,
                                             (QtLayoutInterface)QtActivityDelegate.this);
+            BackendRegister.registerBackend(QtInputInterface.class,
+                                            (QtInputInterface)m_inputDelegate);
         }
     }
 
@@ -76,6 +78,7 @@ class QtActivityDelegate extends QtActivityDelegateBase
             BackendRegister.unregisterBackend(QtAccessibilityInterface.class);
             BackendRegister.unregisterBackend(QtMenuInterface.class);
             BackendRegister.unregisterBackend(QtLayoutInterface.class);
+            BackendRegister.unregisterBackend(QtInputInterface.class);
         }
     }
 

src/android/jar/src/org/qtproject/qt/android/QtActivityDelegateBase.java

@@ -64,7 +64,6 @@ abstract class QtActivityDelegateBase
         return m_displayManager;
     }
 
-    @UsedFromNativeCode
     QtInputDelegate getInputDelegate() {
         return m_inputDelegate;
     }

src/android/jar/src/org/qtproject/qt/android/QtInputConnection.java

@@ -77,6 +77,10 @@ class QtInputConnection extends BaseInputConnection
                 Log.w(QtTAG, "HideKeyboardRunnable: The activity reference is null");
                 return;
             }
+            if (m_qtInputConnectionListener == null) {
+                Log.w(QtTAG, "HideKeyboardRunnable: QtInputConnectionListener is null");
+                return;
+            }
 
             Rect r = new Rect();
             activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(r);
@@ -109,7 +113,7 @@ class QtInputConnection extends BaseInputConnection
     {
         if (closing)
             m_view.postDelayed(new HideKeyboardRunnable(), 100);
-        else
+        else if (m_qtInputConnectionListener != null)
             m_qtInputConnectionListener.onSetClosing(false);
     }
 
@@ -297,7 +301,8 @@ class QtInputConnection extends BaseInputConnection
                     restartImmInput();
                     break;
                 default:
-                    m_qtInputConnectionListener.onSendKeyEventDefaultCase();
+                    if (m_qtInputConnectionListener != null)
+                        m_qtInputConnectionListener.onSendKeyEventDefaultCase();
                     break;
             }
         }

src/android/jar/src/org/qtproject/qt/android/QtInputDelegate.java

@@ -21,7 +21,8 @@ import android.view.inputmethod.InputMethodManager;
 import org.qtproject.qt.android.QtInputConnection.QtInputConnectionListener;
 
 /** @noinspection FieldCanBeLocal*/
-class QtInputDelegate implements QtInputConnection.QtInputConnectionListener {
+class QtInputDelegate implements QtInputConnection.QtInputConnectionListener, QtInputInterface
+{
 
     // keyboard methods
     public static native void keyDown(int key, int unicode, int modifier, boolean autoRepeat);
@@ -90,90 +91,20 @@ class QtInputDelegate implements QtInputConnection.QtInputConnectionListener {
         m_imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
     }
 
-    // QtInputConnectionListener methods
+    // QtInputInterface implementation begin
     @Override
-    public void onSetClosing(boolean closing) {
-        if (!closing)
-            setKeyboardVisibility(true, System.nanoTime());
+    public void updateSelection(final int selStart, final int selEnd,
+                                final int candidatesStart, final int candidatesEnd)
+    {
+        QtNative.runAction(() -> {
+            if (m_imm == null)
+                return;
+
+            m_imm.updateSelection(m_currentEditText, selStart, selEnd, candidatesStart, candidatesEnd);
+        });
     }
 
     @Override
-    public void onHideKeyboardRunnableDone(boolean visibility, long hideTimeStamp) {
-        setKeyboardVisibility(visibility, hideTimeStamp);
-    }
-
-    @Override
-    public void onSendKeyEventDefaultCase() {
-        hideSoftwareKeyboard();
-    }
-    // QtInputConnectionListener methods
-
-    public boolean isKeyboardVisible()
-    {
-        return m_keyboardIsVisible;
-    }
-
-    // Is the keyboard fully visible i.e. visible and no ongoing animation
-    @UsedFromNativeCode
-    public boolean isSoftwareKeyboardVisible()
-    {
-        return isKeyboardVisible() && !m_isKeyboardHidingAnimationOngoing;
-    }
-
-    void setSoftInputMode(int inputMode)
-    {
-        m_softInputMode = inputMode;
-    }
-
-    QtEditText getCurrentQtEditText()
-    {
-        return m_currentEditText;
-    }
-
-    void setEditPopupMenu(EditPopupMenu editPopupMenu)
-    {
-        m_editPopupMenu = editPopupMenu;
-    }
-
-    private void keyboardVisibilityUpdated(boolean visibility)
-    {
-        m_isKeyboardHidingAnimationOngoing = false;
-        QtInputDelegate.keyboardVisibilityChanged(visibility);
-    }
-
-    public void setKeyboardVisibility(boolean visibility, long timeStamp)
-    {
-        if (m_showHideTimeStamp > timeStamp)
-            return;
-        m_showHideTimeStamp = timeStamp;
-
-        if (m_keyboardIsVisible == visibility)
-            return;
-        m_keyboardIsVisible = visibility;
-        keyboardVisibilityUpdated(m_keyboardIsVisible);
-
-        // Hiding the keyboard clears the immersive mode, so we need to set it again.
-        if (!visibility)
-            m_keyboardVisibilityListener.onKeyboardVisibilityChange();
-
-    }
-
-    @UsedFromNativeCode
-    public void resetSoftwareKeyboard()
-    {
-        if (m_imm == null || m_currentEditText == null)
-            return;
-        m_currentEditText.postDelayed(() -> {
-            m_imm.restartInput(m_currentEditText);
-            m_currentEditText.m_optionsChanged = false;
-        }, 5);
-    }
-
-    void setFocusedView(QtEditText currentEditText)
-    {
-        m_currentEditText = currentEditText;
-    }
-
     public void showSoftwareKeyboard(Activity activity, QtLayout layout,
                                      final int x, final int y, final int width, final int height,
                                      final int inputHints, final int enterKeyType)
@@ -217,6 +148,149 @@ class QtInputDelegate implements QtInputConnection.QtInputConnectionListener {
         });
     }
 
+    @Override
+    public int getSelectHandleWidth()
+    {
+        int width = 0;
+        if (m_leftSelectionHandle != null && m_rightSelectionHandle != null) {
+            width = Math.max(m_leftSelectionHandle.width(), m_rightSelectionHandle.width());
+        } else if (m_cursorHandle != null) {
+            width = m_cursorHandle.width();
+        }
+        return width;
+    }
+
+    /* called from the C++ code when the position of the cursor or selection handles needs to
+       be adjusted.
+       mode is one of QAndroidInputContext::CursorHandleShowMode
+    */
+    @Override
+    public void updateHandles(Activity activity, QtLayout layout, int mode,
+                              int editX, int editY, int editButtons,
+                              int x1, int y1, int x2, int y2, boolean rtl)
+    {
+        QtNative.runAction(() -> updateHandleImpl(activity, layout, mode, editX, editY, editButtons,
+                x1, y1, x2, y2, rtl));
+    }
+
+    @Override
+    public QtInputConnection.QtInputConnectionListener getInputConnectionListener()
+    {
+        return this;
+    }
+
+    @Override
+    public void resetSoftwareKeyboard()
+    {
+        if (m_imm == null || m_currentEditText == null)
+            return;
+        m_currentEditText.postDelayed(() -> {
+            m_imm.restartInput(m_currentEditText);
+            m_currentEditText.m_optionsChanged = false;
+        }, 5);
+    }
+
+    @Override
+    public void hideSoftwareKeyboard()
+    {
+        m_isKeyboardHidingAnimationOngoing = true;
+        QtNative.runAction(() -> {
+            if (m_imm == null || m_currentEditText == null)
+                return;
+
+            m_imm.hideSoftInputFromWindow(m_currentEditText.getWindowToken(), 0,
+                    new ResultReceiver(new Handler()) {
+                        @Override
+                        protected void onReceiveResult(int resultCode, Bundle resultData) {
+                            switch (resultCode) {
+                                case InputMethodManager.RESULT_SHOWN:
+                                case InputMethodManager.RESULT_UNCHANGED_SHOWN:
+                                    setKeyboardVisibility(true, System.nanoTime());
+                                    break;
+                                case InputMethodManager.RESULT_HIDDEN:
+                                case InputMethodManager.RESULT_UNCHANGED_HIDDEN:
+                                    setKeyboardVisibility(false, System.nanoTime());
+                                    break;
+                            }
+                        }
+                    });
+        });
+    }
+
+    // Is the keyboard fully visible i.e. visible and no ongoing animation
+    @Override
+    public boolean isSoftwareKeyboardVisible()
+    {
+        return isKeyboardVisible() && !m_isKeyboardHidingAnimationOngoing;
+    }
+    // QtInputInterface implementation end
+
+    // QtInputConnectionListener methods
+    @Override
+    public void onSetClosing(boolean closing) {
+        if (!closing)
+            setKeyboardVisibility(true, System.nanoTime());
+    }
+
+    @Override
+    public void onHideKeyboardRunnableDone(boolean visibility, long hideTimeStamp) {
+        setKeyboardVisibility(visibility, hideTimeStamp);
+    }
+
+    @Override
+    public void onSendKeyEventDefaultCase() {
+        hideSoftwareKeyboard();
+    }
+    // QtInputConnectionListener methods
+
+    public boolean isKeyboardVisible()
+    {
+        return m_keyboardIsVisible;
+    }
+
+    void setSoftInputMode(int inputMode)
+    {
+        m_softInputMode = inputMode;
+    }
+
+    QtEditText getCurrentQtEditText()
+    {
+        return m_currentEditText;
+    }
+
+    void setEditPopupMenu(EditPopupMenu editPopupMenu)
+    {
+        m_editPopupMenu = editPopupMenu;
+    }
+
+    private void keyboardVisibilityUpdated(boolean visibility)
+    {
+        m_isKeyboardHidingAnimationOngoing = false;
+        QtInputDelegate.keyboardVisibilityChanged(visibility);
+    }
+
+    public void setKeyboardVisibility(boolean visibility, long timeStamp)
+    {
+        if (m_showHideTimeStamp > timeStamp)
+            return;
+        m_showHideTimeStamp = timeStamp;
+
+        if (m_keyboardIsVisible == visibility)
+            return;
+        m_keyboardIsVisible = visibility;
+        keyboardVisibilityUpdated(m_keyboardIsVisible);
+
+        // Hiding the keyboard clears the immersive mode, so we need to set it again.
+        if (!visibility)
+            m_keyboardVisibilityListener.onKeyboardVisibilityChange();
+
+    }
+
+    void setFocusedView(QtEditText currentEditText)
+    {
+        m_currentEditText = currentEditText;
+    }
+
     private boolean updateSoftInputMode(Activity activity, int height)
     {
         DisplayMetrics metrics = new DisplayMetrics();
@@ -284,69 +358,6 @@ class QtInputDelegate implements QtInputConnection.QtInputConnectionListener {
         }, m_probeKeyboardHeightDelayMs);
     }
 
-    public void hideSoftwareKeyboard()
-    {
-        m_isKeyboardHidingAnimationOngoing = true;
-        QtNative.runAction(() -> {
-            if (m_imm == null || m_currentEditText == null)
-                return;
-
-            m_imm.hideSoftInputFromWindow(m_currentEditText.getWindowToken(), 0,
-                    new ResultReceiver(new Handler()) {
-                @Override
-                protected void onReceiveResult(int resultCode, Bundle resultData) {
-                    switch (resultCode) {
-                        case InputMethodManager.RESULT_SHOWN:
-                        case InputMethodManager.RESULT_UNCHANGED_SHOWN:
-                            setKeyboardVisibility(true, System.nanoTime());
-                            break;
-                        case InputMethodManager.RESULT_HIDDEN:
-                        case InputMethodManager.RESULT_UNCHANGED_HIDDEN:
-                            setKeyboardVisibility(false, System.nanoTime());
-                            break;
-                    }
-                }
-            });
-        });
-    }
-
-    @UsedFromNativeCode
-    public void updateSelection(final int selStart, final int selEnd,
-                                final int candidatesStart, final int candidatesEnd)
-    {
-        QtNative.runAction(() -> {
-            if (m_imm == null)
-                return;
-
-            m_imm.updateSelection(m_currentEditText, selStart, selEnd, candidatesStart, candidatesEnd);
-        });
-    }
-
-    @UsedFromNativeCode
-    public int getSelectHandleWidth()
-    {
-        int width = 0;
-        if (m_leftSelectionHandle != null && m_rightSelectionHandle != null) {
-            width = Math.max(m_leftSelectionHandle.width(), m_rightSelectionHandle.width());
-        } else if (m_cursorHandle != null) {
-            width = m_cursorHandle.width();
-        }
-        return width;
-    }
-
-    /* called from the C++ code when the position of the cursor or selection handles needs to
-       be adjusted.
-       mode is one of QAndroidInputContext::CursorHandleShowMode
-    */
-    @UsedFromNativeCode
-    public void updateHandles(Activity activity, QtLayout layout, int mode,
-                              int editX, int editY, int editButtons,
-                              int x1, int y1, int x2, int y2, boolean rtl)
-    {
-        QtNative.runAction(() -> updateHandleImpl(activity, layout, mode, editX, editY, editButtons,
-                x1, y1, x2, y2, rtl));
-    }
-
     private void updateHandleImpl(Activity activity, QtLayout layout, int mode,
                                int editX, int editY, int editButtons,
                                int x1, int y1, int x2, int y2, boolean rtl)

src/android/jar/src/org/qtproject/qt/android/QtInputInterface.java

@@ -0,0 +1,21 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+package org.qtproject.qt.android;
+
+import android.app.Activity;
+
+@UsedFromNativeCode
+interface QtInputInterface {
+    void updateSelection(final int selStart, final int selEnd, final int candidatesStart,
+                         final int candidatesEnd);
+    void showSoftwareKeyboard(Activity activity, QtLayout layout, final int x, final int y,
+                              final int width, final int height, final int inputHints,
+                              final int enterKeyType);
+    void resetSoftwareKeyboard();
+    void hideSoftwareKeyboard();
+    boolean isSoftwareKeyboardVisible();
+    int getSelectHandleWidth();
+    void updateHandles(Activity activity, QtLayout layout, int mode, int editX, int editY,
+                       int editButtons, int x1, int y1, int x2, int y2, boolean rtl);
+    QtInputConnection.QtInputConnectionListener getInputConnectionListener();
+}

src/android/jar/src/org/qtproject/qt/android/QtServiceEmbeddedDelegate.java

@@ -29,13 +29,7 @@ class QtServiceEmbeddedDelegate implements QtEmbeddedViewInterface, QtNative.App
         QtNative.registerAppStateListener(this);
         QtNative.setService(service);
         // QTBUG-122920 TODO Implement accessibility for service UIs
-    }
-
-    @UsedFromNativeCode
-    QtInputDelegate getInputDelegate()
-    {
-        // TODO Implement text input (QTBUG-122552)
-        return null;
+        // QTBUG-122552 TODO Implement text input
     }
 
     @Override

src/android/jar/src/org/qtproject/qt/android/QtWindow.java

@@ -26,11 +26,12 @@ class QtWindow extends QtLayout implements QtSurfaceInterface {
     private static native void setSurface(int windowId, Surface surface);
     static native void windowFocusChanged(boolean hasFocus, int id);
 
-    public QtWindow(Context context, QtWindow parentWindow, QtInputDelegate delegate)
+    public QtWindow(Context context, QtWindow parentWindow,
+                    QtInputConnection.QtInputConnectionListener listener)
     {
         super(context);
         setId(View.generateViewId());
-        m_editText = new QtEditText(context, delegate);
+        m_editText = new QtEditText(context, listener);
         setParent(parentWindow);
         setFocusableInTouchMode(true);
         addView(m_editText, new QtLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,

src/plugins/platforms/android/androidjniinput.cpp

@@ -25,6 +25,7 @@ using namespace QtAndroid;
 
 Q_DECLARE_JNI_CLASS(QtLayout, "org/qtproject/qt/android/QtLayout")
 Q_DECLARE_JNI_CLASS(QtLayoutInterface, "org/qtproject/qt/android/QtLayoutInterface")
+Q_DECLARE_JNI_CLASS(QtInputInterface, "org/qtproject/qt/android/QtInputInterface")
 
 namespace QtAndroidInput
 {
@@ -107,42 +108,40 @@ namespace QtAndroidInput
     void updateSelection(int selStart, int selEnd, int candidatesStart, int candidatesEnd)
     {
         qCDebug(lcQpaInputMethods) << ">>> UPDATESELECTION" << selStart << selEnd << candidatesStart << candidatesEnd;
-        qtInputDelegate().callMethod<void>("updateSelection",
-                                           selStart,
-                                           selEnd,
-                                           candidatesStart,
-                                           candidatesEnd);
+        AndroidBackendRegister *reg = QtAndroid::backendRegister();
+        reg->callInterface<QtJniTypes::QtInputInterface, void>("updateSelection", selStart, selEnd,
+                                                               candidatesStart, candidatesEnd);
     }
 
     void showSoftwareKeyboard(int left, int top, int width, int height, int inputHints, int enterKeyType)
     {
-        qtInputDelegate().callMethod<void>("showSoftwareKeyboard",
-                                           QtAndroidPrivate::activity(),
-                                           qtLayout().object<QtJniTypes::QtLayout>(),
-                                           left,
-                                           top,
-                                           width,
-                                           height,
-                                           inputHints,
-                                           enterKeyType);
+        AndroidBackendRegister *reg = QtAndroid::backendRegister();
+        reg->callInterface<QtJniTypes::QtInputInterface, void>(
+                "showSoftwareKeyboard", QtAndroidPrivate::activity(),
+                qtLayout().object<QtJniTypes::QtLayout>(), left, top, width, height, inputHints,
+                enterKeyType);
         qCDebug(lcQpaInputMethods) << "@@@ SHOWSOFTWAREKEYBOARD" << left << top << width << height << inputHints << enterKeyType;
     }
 
     void resetSoftwareKeyboard()
     {
-        qtInputDelegate().callMethod<void>("resetSoftwareKeyboard");
+        AndroidBackendRegister *reg = QtAndroid::backendRegister();
+        reg->callInterface<QtJniTypes::QtInputInterface, void>("resetSoftwareKeyboard");
         qCDebug(lcQpaInputMethods) << "@@@ RESETSOFTWAREKEYBOARD";
     }
 
     void hideSoftwareKeyboard()
     {
-        qtInputDelegate().callMethod<void>("hideSoftwareKeyboard");
+        AndroidBackendRegister *reg = QtAndroid::backendRegister();
+        reg->callInterface<QtJniTypes::QtInputInterface, void>("hideSoftwareKeyboard");
         qCDebug(lcQpaInputMethods) << "@@@ HIDESOFTWAREKEYBOARD";
     }
 
     bool isSoftwareKeyboardVisible()
     {
-        return qtInputDelegate().callMethod<jboolean>("isSoftwareKeyboardVisible");
+        AndroidBackendRegister *reg = QtAndroid::backendRegister();
+        return reg->callInterface<QtJniTypes::QtInputInterface, jboolean>(
+                "isSoftwareKeyboardVisible");
     }
 
     QRect softwareKeyboardRect()
@@ -152,17 +151,17 @@ namespace QtAndroidInput
 
     int getSelectHandleWidth()
     {
-        return qtInputDelegate().callMethod<jint>("getSelectHandleWidth");
+        AndroidBackendRegister *reg = QtAndroid::backendRegister();
+        return reg->callInterface<QtJniTypes::QtInputInterface, jint>("getSelectHandleWidth");
     }
 
     void updateHandles(int mode, QPoint editMenuPos, uint32_t editButtons, QPoint cursor, QPoint anchor, bool rtl)
     {
-        qtInputDelegate().callMethod<void>("updateHandles",
-                                           QtAndroidPrivate::activity(),
-                                           qtLayout().object<QtJniTypes::QtLayout>(),
-                                           mode, editMenuPos.x(), editMenuPos.y(), editButtons,
-                                           cursor.x(), cursor.y(),
-                                           anchor.x(), anchor.y(), rtl);
+        AndroidBackendRegister *reg = QtAndroid::backendRegister();
+        reg->callInterface<QtJniTypes::QtInputInterface, void>(
+                "updateHandles", QtAndroidPrivate::activity(),
+                qtLayout().object<QtJniTypes::QtLayout>(), mode, editMenuPos.x(), editMenuPos.y(),
+                editButtons, cursor.x(), cursor.y(), anchor.x(), anchor.y(), rtl);
     }
 
     // from https://developer.android.com/reference/android/view/MotionEvent#getButtonState()

src/plugins/platforms/android/androidjnimain.cpp

@@ -55,7 +55,6 @@ static jclass m_qtActivityClass = nullptr;
 static jclass m_qtServiceClass = nullptr;
 
 static QtJniTypes::QtActivityDelegateBase m_activityDelegate = nullptr;
-static QtJniTypes::QtInputDelegate m_inputDelegate = nullptr;
 
 static int m_pendingApplicationState = -1;
 static QBasicMutex m_platformMutex;
@@ -210,16 +209,6 @@ namespace QtAndroid
         return m_activityDelegate;
     }
 
-    QtJniTypes::QtInputDelegate qtInputDelegate()
-    {
-        if (!m_inputDelegate.isValid()) {
-            m_inputDelegate = qtActivityDelegate().callMethod<QtJniTypes::QtInputDelegate>(
-                    "getInputDelegate");
-        }
-
-        return m_inputDelegate;
-    }
-
     bool isQtApplication()
     {
         // Returns true if the app is a Qt app, i.e. Qt controls the whole app and

src/plugins/platforms/android/androidjnimain.h

@@ -51,7 +51,6 @@ namespace QtAndroid
     jclass applicationClass();
 
     QtJniTypes::QtActivityDelegateBase qtActivityDelegate();
-    QtJniTypes::QtInputDelegate qtInputDelegate();
 
     // Keep synchronized with flags in ActivityDelegate.java
     enum SystemUiVisibility {

src/plugins/platforms/android/qandroidplatformwindow.cpp

@@ -16,6 +16,10 @@ QT_BEGIN_NAMESPACE
 
 Q_LOGGING_CATEGORY(lcQpaWindow, "qt.qpa.window")
 
+Q_DECLARE_JNI_CLASS(QtInputInterface, "org/qtproject/qt/android/QtInputInterface")
+Q_DECLARE_JNI_CLASS(QtInputConnectionListener,
+                    "org/qtproject/qt/android/QtInputConnection$QtInputConnectionListener")
+
 QAndroidPlatformWindow::QAndroidPlatformWindow(QWindow *window)
     : QPlatformWindow(window), m_nativeQtWindow(nullptr),
       m_surfaceContainerType(SurfaceContainer::TextureView), m_nativeParentQtWindow(nullptr),
@@ -55,10 +59,13 @@ QAndroidPlatformWindow::QAndroidPlatformWindow(QWindow *window)
             m_nativeParentQtWindow = androidParent->nativeWindow();
     }
 
+    AndroidBackendRegister *reg = QtAndroid::backendRegister();
+    QtJniTypes::QtInputConnectionListener listener =
+            reg->callInterface<QtJniTypes::QtInputInterface, QtJniTypes::QtInputConnectionListener>(
+                    "getInputConnectionListener");
+
     m_nativeQtWindow = QJniObject::construct<QtJniTypes::QtWindow>(
-        QNativeInterface::QAndroidApplication::context(),
-        m_nativeParentQtWindow,
-        QtAndroid::qtInputDelegate());
+            QNativeInterface::QAndroidApplication::context(), m_nativeParentQtWindow, listener);
     m_nativeViewId = m_nativeQtWindow.callMethod<jint>("getId");
 
     if (window->isTopLevel())