Window already focused, ignoring focus gain,该怎么解决

Window already focused, ignoring focus gain
这种警告是如何产生的？
W/InputManagerService( 92): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@45db7aa0

[解决办法]
这个应该和窗口获取焦点的判断有关系，你查查android SDK里面是如何检测窗口焦点的