代号一的内存不足 [英] Out Of Memory in Codename One

问题描述

我的应用程序使用SidePanel菜单作为导航，当我显示新表单或打开侧边栏面板时，该应用程序占用越来越多的内存.可能的是，这取决于在SideBar中使用某些Image处理(将图像蒙版到圆形)和大量使用URLImage类下载图像.但是最有可能是由于我没有释放以前表格的记忆.

My app used the SidePanel menu as navigation and when I show new form or open sidebar panel, the app takes more and more memory. Possible, it depended on using some Image processing (to mask image to circle) in SideBar and a lot of using URLImage class for downloading images. But most likely due to the fact that I did not free memory of the previous form.

如何释放此内存?

更改形式的代码:

public void showForm(FormBuilder form) {
    if ( current == null ||
         ( ! form.getForm().getTitle().equals(current.getTitle()) )
    ) {
        current = form.getForm();
        if (!(form instanceof splash)) {
            try {
                sideMenu.addMenu(current);
            } catch (IOException ex) {

            }
        }
        current.show();
    }
}

void sideMenu.addMenu(Form form); -用于将SideBar菜单添加到表单的静态函数.

void sideMenu.addMenu(Form form); - Static function for add SideBar menu to form.

推荐答案

以前的表格应"为GC.但是，如果您在以前的表单中引用了一个元素，则整个表单及其所有内容都将保留.这是因为每个组件直到其父窗体都一直引用其父窗体.

Previous forms "should" be GC'd. However, if you have a reference to one element in the previous form the whole form and all its content will be kept. This is because every component has a reference to its parent all the way up to the parent form.

您可以使用诸如NetBeans内存分析器之类的工具，也可以使用我们的性能分析器工具来跟踪内存使用情况.图像遮罩有点贵，但是如果使用URLImage内置的遮罩，则所有内存开销都是GC的，因此这不成问题.

You can use tools like the NetBeans memory profiler and also our performance profiler tool in NetBeans to track down memory usage. Image masking is a bit expensive but if you used the one built into URLImage all the memory overhead is GC'd so it shouldn't be a problem.

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