当屏幕不在显示堆栈上时，如何截取屏幕截图？黑莓

发布于 2025-01-06 04:48:19 字数 341 浏览 2 评论 0原文

我想要将屏幕从 my_screen1 转换到 my_screen2。想法是截取两个屏幕的屏幕截图，并使用动画从 1 过渡到 2。然后将 my_screen2 推送到显示堆栈上。但是，在将屏幕 my_screen2 推入显示堆栈之前，我可以截取它吗？代码：

 Display.screenshot(bitmap);

给出已经显示的屏幕截图。有类似的东西吗：

 my_screen2.screenshot(bitmap);

请问有示例代码吗？多谢！

原文

I want to make screen transition from my_screen1 to my_screen2. Idea is to take screenshot of both screens, and with animation to transit from 1 to 2. And then to push my_screen2 on display stack. But can I take screenshot of screen my_screen2 before I push it on display stack?
the code:

 Display.screenshot(bitmap);

gives screenshot of screen which is already on display. Is there something like:

 my_screen2.screenshot(bitmap);

Any example code please? Thanks a lot!

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你的他你的她 2025-01-13 04:48:19

您无法对不在显示堆栈上或位于特定屏幕下方的屏幕进行屏幕截图。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。

如果您想要从一个屏幕过渡动画屏幕到另一个屏幕时，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);

You cannot take screenshot of a screen which is not on the display stack ,or which is below a particular screen. The docs say that Display.screenshot() Takes a screenshot of the entire screen and saves it into a Bitmap.

If you want to have a screen transition animation to go from one screen to another, you can do the following.

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);

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