QClipboard: make dataChanged() signal work on Android

This part has not been implemented before.

Also replace deprecated android.text.ClipboardManager with modern
android.content.ClipboardManager.

Task-number: QTBUG-58548
Change-Id: I190208042af8a6c87ed391c6c72f3f51e58dfad3
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

src/android/jar/src/org/qtproject/qt5/android/QtNative.java

@@ -52,7 +52,8 @@ import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.os.Handler;
 import android.os.Looper;
-import android.text.ClipboardManager;
+import android.content.ClipboardManager;
+import android.content.ClipboardManager.OnPrimaryClipChangedListener;
 import android.os.Build;
 import android.util.Log;
 import android.view.ContextMenu;
@@ -584,7 +585,14 @@ public class QtNative
                 @Override
                 public void run() {
                     if (m_activity != null)
-                        m_clipboardManager = (android.text.ClipboardManager) m_activity.getSystemService(Context.CLIPBOARD_SERVICE);
+                        m_clipboardManager = (android.content.ClipboardManager) m_activity.getSystemService(Context.CLIPBOARD_SERVICE);
+                    if (m_clipboardManager != null) {
+                        m_clipboardManager.addPrimaryClipChangedListener(new ClipboardManager.OnPrimaryClipChangedListener() {
+                            public void onPrimaryClipChanged() {
+                                onClipboardDataChanged();
+                            }
+                        });
+                    }
                     semaphore.release();
                 }
             });
@@ -844,6 +852,10 @@ public class QtNative
     public static native void onContextMenuClosed(Menu menu);
     // menu methods
 
+    // clipboard methods
+    public static native void onClipboardDataChanged();
+    // clipboard methods
+
     // activity methods
     public static native void onActivityResult(int requestCode, int resultCode, Intent data);
     public static native void onNewIntent(Intent data);

src/plugins/platforms/android/androidjniclipboard.cpp

@@ -38,7 +38,6 @@
 ****************************************************************************/
 
 #include "androidjniclipboard.h"
-#include "androidjnimain.h"
 #include <QtCore/private/qjni_p.h>
 
 QT_BEGIN_NAMESPACE
@@ -46,10 +45,23 @@ QT_BEGIN_NAMESPACE
 using namespace QtAndroid;
 namespace QtAndroidClipboard
 {
-    void setClipboardListener(QAndroidPlatformClipboard *listener)
+    QAndroidPlatformClipboard *m_manager = nullptr;
+
+    static char const *const QtNativeClassName = "org/qtproject/qt5/android/QtNative";
+    static JNINativeMethod methods[] = {
+        {"onClipboardDataChanged", "()V", (void *)onClipboardDataChanged}
+    };
+
+    void setClipboardManager(QAndroidPlatformClipboard *manager)
     {
-        Q_UNUSED(listener);
+        m_manager = manager;
         QJNIObjectPrivate::callStaticMethod<void>(applicationClass(), "registerClipboardManager");
+        jclass appClass = QtAndroid::applicationClass();
+        QJNIEnvironmentPrivate env;
+        if (env->RegisterNatives(appClass, methods, sizeof(methods) / sizeof(methods[0])) < 0) {
+            __android_log_print(ANDROID_LOG_FATAL,"Qt", "RegisterNatives failed");
+            return;
+        }
     }
 
     void setClipboardText(const QString &text)
@@ -73,6 +85,11 @@ namespace QtAndroidClipboard
                                                                            "()Ljava/lang/String;");
         return text.toString();
     }
+
+    void onClipboardDataChanged(JNIEnv */*env*/, jobject /*thiz*/)
+    {
+        m_manager->emitChanged(QClipboard::Clipboard);
+    }
 }
 
 QT_END_NAMESPACE

src/plugins/platforms/android/androidjniclipboard.h

@@ -41,6 +41,8 @@
 #define ANDROIDJNICLIPBOARD_H
 
 #include <QString>
+#include "qandroidplatformclipboard.h"
+#include "androidjnimain.h"
 
 QT_BEGIN_NAMESPACE
 
@@ -48,10 +50,11 @@ class QAndroidPlatformClipboard;
 namespace QtAndroidClipboard
 {
     // Clipboard support
-    void setClipboardListener(QAndroidPlatformClipboard *listener);
+    void setClipboardManager(QAndroidPlatformClipboard *manager);
     void setClipboardText(const QString &text);
     bool hasClipboardText();
     QString clipboardText();
+    void onClipboardDataChanged(JNIEnv */*env*/, jobject /*thiz*/);
     // Clipboard support
 }
 

src/plugins/platforms/android/qandroidplatformclipboard.cpp

@@ -45,7 +45,7 @@ QT_BEGIN_NAMESPACE
 
 QAndroidPlatformClipboard::QAndroidPlatformClipboard()
 {
-    QtAndroidClipboard::setClipboardListener(this);
+    QtAndroidClipboard::setClipboardManager(this);
 }
 
 QMimeData *QAndroidPlatformClipboard::mimeData(QClipboard::Mode mode)