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Commit c04168a8 authored by shuangxi1's avatar shuangxi1
Browse files

tImpl : Avert different threads changes per view. 

Only the original thread that created a view hierarchy can
touch its views and avert different threads touch its views.

Change-Id: Id41d001d47a03357bfb8b1c595d56f9c4272cf44
parent 43ff3982

core/java/android/view/ViewRootImpl.java

100644 → 100755
+21 −7
Original line number Diff line number Diff line
@@ -3386,6 +3386,7 @@ public final class ViewRootImpl implements ViewParent, 
    private final static int MSG_DISPATCH_WINDOW_SHOWN = 25;

    private final static int MSG_REQUEST_KEYBOARD_SHORTCUTS = 26;

    private final static int MSG_UPDATE_POINTER_ICON = 27;

    private final static int MSG_HIGHTEXT_CONTRAST_CHANGED = 28;



    final class ViewRootHandler extends Handler {

        @Override
@@ -3435,6 +3436,8 @@ public final class ViewRootImpl implements ViewParent, 
                    return "MSG_DISPATCH_WINDOW_SHOWN";

                case MSG_UPDATE_POINTER_ICON:

                    return "MSG_UPDATE_POINTER_ICON";

                case MSG_HIGHTEXT_CONTRAST_CHANGED:

                    return "MSG_HIGHTEXT_CONTRAST_CHANGED";

            }

            return super.getMessageName(message);

        }
@@ -3693,6 +3696,9 @@ public final class ViewRootImpl implements ViewParent, 
                MotionEvent event = (MotionEvent) msg.obj;

                resetPointerIcon(event);

            } break;

            case MSG_HIGHTEXT_CONTRAST_CHANGED: {

                handleHighTextContrastChange(msg.arg1 != 0);

            } break;

            }

        }

    }
@@ -7272,19 +7278,27 @@ public final class ViewRootImpl implements ViewParent, 
        }

    }



    void handleHighTextContrastChange(boolean enabled) {

        mAttachInfo.mHighContrastText = enabled;

        // Destroy Displaylists so they can be recreated with high contrast recordings

        destroyHardwareResources();

        // Schedule redraw, which will rerecord + redraw all text

        invalidate();

    }



    public void dispatchHighTextContrastChange(boolean enabled) {

        Message msg = mHandler.obtainMessage(MSG_HIGHTEXT_CONTRAST_CHANGED);

        msg.arg1 = enabled ? 1 : 0;

        mHandler.sendMessage(msg);

    }



    final class HighContrastTextManager implements HighTextContrastChangeListener {

        HighContrastTextManager() {

            mAttachInfo.mHighContrastText = mAccessibilityManager.isHighTextContrastEnabled();

        }

        @Override

        public void onHighTextContrastStateChanged(boolean enabled) {

            mAttachInfo.mHighContrastText = enabled;



            // Destroy Displaylists so they can be recreated with high contrast recordings

            destroyHardwareResources();



            // Schedule redraw, which will rerecord + redraw all text

            invalidate();

            dispatchHighTextContrastChange(enabled);

        }

    }