Android: Fix Application becomes unresponsive issue

Block key events until the plugin is running.

Fixes: QTBUG-67944
Pick-to: 5.15 6.1
Change-Id: Iea47f2e94d850141834a7e8fc26218be2cacf660
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

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

@@ -158,6 +158,7 @@ public class QtActivityDelegate
     private CursorHandle m_leftSelectionHandle;
     private CursorHandle m_rightSelectionHandle;
     private EditPopupMenu m_editPopupMenu;
+    private boolean m_isPluginRunning = false;
 
     private QtAccessibilityDelegate m_accessibilityDelegate = null;
 
@@ -903,6 +904,11 @@ public class QtActivityDelegate
         m_accessibilityDelegate.notifyObjectFocus(viewId);
     }
 
+    public void notifyQtAndroidPluginRunning(boolean running)
+    {
+        m_isPluginRunning = running;
+    }
+
     public void initializeAccessibility()
     {
         m_accessibilityDelegate = new QtAccessibilityDelegate(m_activity, m_layout, this);
@@ -1010,7 +1016,7 @@ public class QtActivityDelegate
 
     public boolean onKeyDown(int keyCode, KeyEvent event)
     {
-        if (!m_started)
+        if (!m_started || !m_isPluginRunning)
             return false;
 
         m_metaState = MetaKeyKeyListener.handleKeyDown(m_metaState, keyCode, event);
@@ -1044,7 +1050,7 @@ public class QtActivityDelegate
 
     public boolean onKeyUp(int keyCode, KeyEvent event)
     {
-        if (!m_started)
+        if (!m_started || !m_isPluginRunning)
             return false;
 
         if ((keyCode == KeyEvent.KEYCODE_VOLUME_UP

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

@@ -995,6 +995,11 @@ public class QtNative
         });
     }
 
+    public static void notifyQtAndroidPluginRunning(final boolean running)
+    {
+        m_activityDelegate.notifyQtAndroidPluginRunning(running);
+    }
+
     private static void registerClipboardManager()
     {
         if (m_service == null || m_activity != null) { // Avoid freezing if only service

src/plugins/platforms/android/androidjnimain.cpp

@@ -223,6 +223,11 @@ namespace QtAndroid
         QJniObject::callStaticMethod<void>(m_applicationClass, "notifyObjectFocus","(I)V", accessibilityObjectId);
     }
 
+    void notifyQtAndroidPluginRunning(bool running)
+    {
+        QJniObject::callStaticMethod<void>(m_applicationClass, "notifyQtAndroidPluginRunning","(Z)V", running);
+    }
+
     jobject createBitmap(QImage img, JNIEnv *env)
     {
         if (!m_bitmapClass)

src/plugins/platforms/android/androidjnimain.h

@@ -103,6 +103,7 @@ namespace QtAndroid
     void notifyAccessibilityLocationChange();
     void notifyObjectHide(uint accessibilityObjectId);
     void notifyObjectFocus(uint accessibilityObjectId);
+    void notifyQtAndroidPluginRunning(bool running);
 
     const char *classErrorMsgFmt();
     const char *methodErrorMsgFmt();

src/plugins/platforms/android/qandroidplatformintegration.cpp

@@ -88,6 +88,7 @@ Qt::ScreenOrientation QAndroidPlatformIntegration::m_orientation = Qt::PrimaryOr
 Qt::ScreenOrientation QAndroidPlatformIntegration::m_nativeOrientation = Qt::PrimaryOrientation;
 
 bool QAndroidPlatformIntegration::m_showPasswordEnabled = false;
+static bool m_running = false;
 
 void *QAndroidPlatformNativeInterface::nativeResourceForIntegration(const QByteArray &resource)
 {
@@ -156,6 +157,10 @@ void QAndroidPlatformNativeInterface::customEvent(QEvent *event)
     api->accessibility()->setActive(QtAndroidAccessibility::isActive());
 #endif // QT_NO_ACCESSIBILITY
 
+    if (!m_running) {
+        m_running = true;
+        QtAndroid::notifyQtAndroidPluginRunning(m_running);
+    }
     api->flushPendingUpdates();
 }