android - 使用适用于 Android 的 Intellij IDEA 新 libgdx 项目运行时出现 NullPointerException

Question

重现步骤:

• 下载 setur.jar - http://libgdx.badlogicgames.com/download.html
• 为桌面、Android、iOS、HTML 生成项目
• 打开 Intellij IDEA，按“打开”，然后选择 build.gradle
• 等待 gradle 完成工作人员然后运行 ​​android 项目

我遇到了一些奇怪的问题:

• 15:32:20 编译在 11 秒内成功完成
• 15:32:20 NullPointerException: null
• 15:32:30 错误报告 提交反馈时出错:null 考虑在 Android Issue Tracker 上创建问题

如果我按下 NullPointerException(链接)，会出现消息和堆栈跟踪:

消息:插件 Android 支持异常。 x 分钟前自上次清除后发生 2 次。禁用插件... <-- 这是一个链接(如果我按下这个，IDEA 将根本看不到 Android。

堆栈跟踪:

java.lang.NullPointerException
    at com.sun.proxy.$Proxy169.getMinSdkVersion(Unknown Source)
    at com.android.tools.idea.model.AndroidModuleInfo.getMinSdkVersion(AndroidModuleInfo.java:71)
    at org.jetbrains.android.facet.AndroidFacet.canRunOnDevice(AndroidFacet.java:560)
    at org.jetbrains.android.facet.AndroidFacet.isCompatibleDevice(AndroidFacet.java:536)
    at org.jetbrains.android.run.DeviceChooser$MyDeviceTableModel.getValueAt(DeviceChooser.java:352)
    at javax.swing.JTable.getValueAt(JTable.java:2716)
    at com.intellij.ui.table.JBTable.getRowHeight(JBTable.java:149)
    at javax.swing.JTable.getRowHeight(JTable.java:993)
    at javax.swing.JTable.getCellRect(JTable.java:2936)
    at javax.swing.JTable.valueChanged(JTable.java:4697)
    at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:184)
    at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:164)
    at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:211)
    at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:405)
    at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:415)
    at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:459)
    at org.jetbrains.android.run.DeviceChooser.updateTable(DeviceChooser.java:227)
    at org.jetbrains.android.run.DeviceChooser.init(DeviceChooser.java:150)
    at org.jetbrains.android.run.ExtendedDeviceChooserDialog.<init>(ExtendedDeviceChooserDialog.java:124)
    at org.jetbrains.android.run.AndroidRunningState.execute(AndroidRunningState.java:245)
    at com.intellij.execution.runners.DefaultProgramRunner.doExecute(DefaultProgramRunner.java:38)
    at org.jetbrains.android.run.AndroidDebugRunner.doExec(AndroidDebugRunner.java:144)
    at org.jetbrains.android.run.AndroidDebugRunner.doExecute(AndroidDebugRunner.java:135)
    at com.intellij.execution.runners.GenericProgramRunner$1.execute(GenericProgramRunner.java:48)
    at com.intellij.execution.impl.ExecutionManagerImpl$2.run(ExecutionManagerImpl.java:208)
    at com.intellij.openapi.project.DumbServiceImpl.runWhenSmart(DumbServiceImpl.java:95)
    at com.intellij.execution.impl.ExecutionManagerImpl$1$1.run(ExecutionManagerImpl.java:172)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:694)
    at java.awt.EventQueue$3.run(EventQueue.java:692)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:697)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:524)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:335)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

Answer 1

Android 不支持 Swing 和 Awt API。所以如果你想在 Android 上运行你的项目不应该依赖于 swing.*/awt.* 包。

如果您希望您的游戏是跨平台的，您应该只使用libgdx GUI 元素。本指南应帮助您入门:https://github.com/libgdx/libgdx/wiki/Scene2d