Android 按键拦截

1. 系统深度拦截

拦截点：frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

拦截接口：interceptKeyBeforeDispatchingInner

/** {@inheritDoc} */
@Override
public long interceptKeyBeforeDispatching(WindowState win, KeyEvent event, int policyFlags) {
        final long result = interceptKeyBeforeDispatchingInner(win, event, policyFlags);
        final int eventDisplayId = event.getDisplayId();

        ...

}

private long interceptKeyBeforeDispatchingInner(WindowState win, KeyEvent event,
             int policyFlags) {
        final boolean keyguardOn = keyguardOn();
        final int keyCode = event.getKeyCode();
        final int repeatCount = event.getRepeatCount();
        ...
        
        //拦截
        if(keyCode ==  KeyEvent.KEYCODE_AUTO_SPEECH)
        {
            return -1;
        }
           
  

2. APP拦截