Android SDK报错 no swt-win32-3550 or swt-win32

D:\design_tools\Android_Sdk\tools>ddms.bat
04:43:40 E/ddms: shutting down due to uncaught exception
04:43:40 E/ddms: no swt-win32-3550 or swt-win32 in swt.library.path, java.library.path or the jar file
java.lang.UnsatisfiedLinkError: no swt-win32-3550 or swt-win32 in swt.library.path, java.library.path or the jar file
        at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
        at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
        at org.eclipse.swt.internal.C.<clinit>(Unknown Source)
        at org.eclipse.swt.graphics.FontData.<init>(Unknown Source)
        at com.android.ddms.PrefsDialog.setDefaults(PrefsDialog.java:221)
        at com.android.ddms.PrefsDialog.init(PrefsDialog.java:150)
        at com.android.ddms.Main.main(Main.java:74)

D:\design_tools\Android_Sdk\tools>android.bat
Exception in thread "main" java.lang.UnsatisfiedLinkError: no swt-win32-3550 or swt-win32 in swt.library.path, java.library.path or the jar file
        at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
        at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
        at org.eclipse.swt.internal.C.<clinit>(Unknown Source)
        at org.eclipse.swt.widgets.Display.<clinit>(Unknown Source)
        at com.android.sdkmanager.Main.showSdkManagerWindow(Main.java:328)
        at com.android.sdkmanager.Main.doAction(Main.java:316)
        at com.android.sdkmanager.Main.run(Main.java:118)
        at com.android.sdkmanager.Main.main(Main.java:101)

从
http://www.filediag.com/dll/exe/swt-win32-3550.dll.html
下载一个放到 C:\Windows\system32\则ok