Question

我想将屏幕从 my_screen1 转换为 my_screen2 。想法是截取两个屏幕的截图，并使用动画从1转换到2.然后将my_screen2推送到显示堆栈。但是我可以在之前截取屏幕my_screen2 的屏幕截图吗？代码：

Display.screenshot(bitmap);

显示已经的屏幕截图。是否有类似的东西：

my_screen2.screenshot(bitmap);

请问任何示例代码？非常感谢！

Answer 1

您无法截取屏幕截图，该屏幕不在显示器堆栈上，也不在特定屏幕下方。文档说Display.screenshot() 获取整个屏幕的屏幕截图并将其保存到位图中。

如果您想让屏幕转换动画从一个屏幕转到另一个屏幕，您可以执行以下操作。

UiEngineInstance engine = Ui.getUiEngineInstance();

                    TransitionContext transitionContextPush = new TransitionContext(
                            TransitionContext.TRANSITION_SLIDE);
                    transitionContextPush.setIntAttribute(
                            TransitionContext.ATTR_DURATION, 150);
                    transitionContextPush.setIntAttribute(
                            TransitionContext.ATTR_DIRECTION,
                            TransitionContext.DIRECTION_LEFT);

                    TransitionContext transitionContextPop = new TransitionContext(
                            TransitionContext.TRANSITION_SLIDE);
                    transitionContextPop.setIntAttribute(
                            TransitionContext.ATTR_DURATION, 150);
                    transitionContextPop.setIntAttribute(
                            TransitionContext.ATTR_DIRECTION,
                            TransitionContext.DIRECTION_RIGHT);
                    transitionContextPop.setIntAttribute(
                            TransitionContext.ATTR_KIND,
                            TransitionContext.KIND_OUT);

                    engine.setTransition(null, thisScreen,
                            UiEngineInstance.TRIGGER_PUSH,
                            transitionContextPush);
                    engine.setTransition(thisScreen, null,
                            UiEngineInstance.TRIGGER_POP,
                            transitionContextPop);
                }
                UiApplication.getUiApplication().pushScreen(thisScreen);

Answer 2

请参阅rahul_narkhede针对OS5之前的滑动屏幕过渡的解决方案，我过去已经成功使用过它。

http://supportforums.blackberry.com/t5/Java-Development/Animated-Screen-transitions/td-p/162521/page/6

当屏幕不在显示堆栈上时，如何截取屏幕截图？黑莓

2 个答案: