消息很清楚，你不能把一种类型转换成完全不同的东西。如果变量是 float 类型，则必须将其作为 float 传递。请参阅 http://developer.android.com/reference/ android / content / Intent.html＃putExtra（java.lang.String，float） [ ^ ]。

The message is quite clear, you cannot cast one type to something totally different. If the variable is a float type then you must pass it as a float. See http://developer.android.com/reference/android/content/Intent.html#putExtra(java.lang.String, float)[^].