下载android-sdk包后，解压，解压后进入tools目录,执行./android打开的android sdk manager空白，一直加载中，只能强制退出
终端中报错如下：
java.lang.NullPointerException
at org.eclipse.swt.widgets.Control.internal_new_GC(Unknown Source)
at org.eclipse.swt.graphics.GC.<init>(Unknown Source)
at org.eclipse.swt.graphics.GC.<init>(Unknown Source)
at org.eclipse.swt.custom.CLabel.getTotalSize(Unknown Source)
at org.eclipse.swt.custom.CLabel.onPaint(Unknown Source)
at org.eclipse.swt.custom.CLabel$1.paintControl(Unknown Source)
at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Control.drawWidget(Unknown Source)
at org.eclipse.swt.widgets.Canvas.drawWidget(Unknown Source)
at org.eclipse.swt.widgets.Widget.drawRect(Unknown Source)
at org.eclipse.swt.widgets.Canvas.drawRect(Unknown Source)
at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Unknown Source)
at org.eclipse.swt.widgets.Display.applicationProc(Unknown Source)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
at org.eclipse.swt.internal.cocoa.NSApplication.nextEventMatchingMask(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at com.android.sdkuilib.internal.repository.ui.SdkUpdaterWindowImpl2.open(SdkUpdaterWindowImpl2.java:148)
at com.android.sdkuilib.repository.SdkUpdaterWindow.open(SdkUpdaterWindow.java:111)
at com.android.sdkmanager.Main.showSdkManagerWindow(Main.java:413)
at com.android.sdkmanager.Main.doAction(Main.java:391)
at com.android.sdkmanager.Main.run(Main.java:151)
at com.android.sdkmanager.Main.main(Main.java:117)