涉及到的源代码及路径： frameworks/base/core/java/android/app/Activity.java
frameworks/base/core/java/com/android/internal/policy/PhoneWindow.java
frameworks/base/core/java/com/android/internal/policy/DecorView.java
frameworks/base/core/java/android/view/InputEventSender.java
frameworks/base/core/java/android/view/InputEventSender.java
frameworks/base/core/java/android/view/InputFilter.java
frameworks/base/core/java/android/view/InputQueue.java
frameworks/base/core/java/android/view/InputDevice.java
frameworks/base/core/java/android/view/InputChannel.java
按键事件：KeyEvent
- Activity.dispatchKeyEvent(): Windown.Callback.dispatchKeyEvent()
- activity.getWindow().superDispatchKeyEvent(): PhoneWindow.superDispatchKeyEvent()
- mDecor.superDispatchKeyEvent() -> DecorView.dispatchKeyEvent() -> ViewGroup.dispatchKeyEvent()
触摸事件：TouchEvent
- Activity.dispatchTouchEvent(): Window.Callback.dispatchTouchEvent()
- activity.getWindow().superDispatchTouchEvent(): PhoneWindow.superDispatchTouchEvent()
- mDecor.superDispatchTouchEvent() -> DecorView.superDispatchTouchEvent() -> ViewGroup.dispatchTouchEvent()