Android: use final keyword for Java class memebers when appropriate

Task-number: QTBUG-118077
Change-Id: Id63569fc59c5d16f41aad92181ae1794cbb6fbc5
Reviewed-by: Tinja Paavoseppä <tinja.paavoseppa@qt.io>
Reviewed-by: Petri Virkkunen <petri.virkkunen@qt.io>

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

@@ -18,7 +18,7 @@ import android.widget.PopupWindow;
 /* This view represents one of the handle (selection or cursor handle) */
 class CursorView extends ImageView
 {
-    private CursorHandle mHandle;
+    private final CursorHandle mHandle;
     // The coordinare which where clicked
     private float m_offsetX;
     private float m_offsetY;
@@ -66,18 +66,18 @@ class CursorView extends ImageView
 // Helper class that manages a cursor or selection handle
 public class CursorHandle implements ViewTreeObserver.OnPreDrawListener
 {
-    private View m_layout = null;
+    private final View m_layout;
     private CursorView m_cursorView = null;
     private PopupWindow m_popup = null;
-    private int m_id;
-    private int m_attr;
-    private Activity m_activity;
+    private final int m_id;
+    private final int m_attr;
+    private final Activity m_activity;
     private int m_posX = 0;
     private int m_posY = 0;
     private int m_lastX;
     private int m_lastY;
     int tolerance;
-    private boolean m_rtl;
+    private final boolean m_rtl;
     int m_yShift;
 
     public CursorHandle(Activity activity, View layout, int id, int attr, boolean rtl) {

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

@@ -17,10 +17,10 @@ import android.widget.PopupWindow;
 public class EditPopupMenu implements ViewTreeObserver.OnPreDrawListener, View.OnLayoutChangeListener,
         EditContextView.OnClickListener
 {
-    private View m_layout = null;
-    private EditContextView m_view = null;
+    private final View m_layout;
+    private final EditContextView m_view;
     private PopupWindow m_popup = null;
-    private Activity m_activity;
+    private final Activity m_activity;
     private int m_posX;
     private int m_posY;
     private int m_buttons;

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

@@ -54,7 +54,7 @@ public class QtActivityDelegate
     private QtAccessibilityDelegate m_accessibilityDelegate = null;
     private final QtDisplayManager m_displayManager = new QtDisplayManager();
 
-    private QtInputDelegate m_inputDelegate = null;
+    private final QtInputDelegate m_inputDelegate;
 
     QtActivityDelegate(Activity activity)
     {

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

@@ -92,7 +92,7 @@ public class QtInputConnection extends BaseInputConnection
         void onSendKeyEventDefaultCase();
     }
 
-    private QtEditText m_view = null;
+    private final QtEditText m_view;
 
     private void setClosing(boolean closing)
     {

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

@@ -38,8 +38,8 @@ public class QtInputDelegate {
     public static native void handleLocationChanged(int id, int x, int y);
     // handle methods
 
-    private QtEditText m_editText = null;
-    private InputMethodManager m_imm = null;
+    private final QtEditText m_editText;
+    private final InputMethodManager m_imm;
 
     private boolean m_keyboardIsVisible = false;
     private boolean m_isKeyboardHidingAnimationOngoing = false;

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

@@ -38,7 +38,7 @@ class ButtonStruct implements View.OnClickListener
         m_text = Html.fromHtml(text);
     }
     QtMessageDialogHelper m_dialog;
-    private int m_id;
+    private final int m_id;
     Spanned m_text;
 
     @Override
@@ -349,7 +349,7 @@ public class QtMessageDialogHelper
         m_handler = 0;
     }
 
-    private Activity m_activity;
+    private final Activity m_activity;
     private int m_standardIcon = 0;
     private Spanned m_title, m_text, m_informativeText, m_detailedText;
     private ArrayList<ButtonStruct> m_buttonsList;

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

@@ -13,7 +13,7 @@ import android.view.SurfaceView;
 
 public class QtSurface extends SurfaceView implements SurfaceHolder.Callback
 {
-    private GestureDetector m_gestureDetector;
+    private final GestureDetector m_gestureDetector;
     private Object m_accessibilityDelegate = null;
 
     public QtSurface(Context context, int id, boolean onTop, int imageDepth)

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

@@ -7,9 +7,9 @@ import java.util.ArrayList;
 import java.util.concurrent.Semaphore;
 
 public class QtThread {
-    private ArrayList<Runnable> m_pendingRunnables = new ArrayList<Runnable>();
+    private final ArrayList<Runnable> m_pendingRunnables = new ArrayList<Runnable>();
     private boolean m_exit = false;
-    private Thread m_qtThread = new Thread(new Runnable() {
+    private final Thread m_qtThread = new Thread(new Runnable() {
         @Override
         public void run() {
             while (!m_exit) {

src/android/jar/src/org/qtproject/qt/android/accessibility/QtAccessibilityDelegate.java

@@ -38,10 +38,10 @@ public class QtAccessibilityDelegate extends View.AccessibilityDelegate
     private static final String DEFAULT_CLASS_NAME = "$VirtualChild";
 
     private View m_view = null;
-    private AccessibilityManager m_manager;
-    private QtActivityDelegate m_activityDelegate;
-    private Activity m_activity;
-    private ViewGroup m_layout;
+    private final AccessibilityManager m_manager;
+    private final QtActivityDelegate m_activityDelegate;
+    private final Activity m_activity;
+    private final ViewGroup m_layout;
 
     // The accessible object that currently has the "accessibility focus"
     // usually indicated by a yellow rectangle on screen.
@@ -453,7 +453,7 @@ public class QtAccessibilityDelegate extends View.AccessibilityDelegate
         return node;
     }
 
-    private AccessibilityNodeProvider m_nodeProvider = new AccessibilityNodeProvider()
+    private final AccessibilityNodeProvider m_nodeProvider = new AccessibilityNodeProvider()
     {
         @Override
         public AccessibilityNodeInfo createAccessibilityNodeInfo(int virtualViewId)