Android adds a broadcast to the custom key and assigns a value to the current focus input box by broadcasting _android

First, add a broadcast to the custom key

Modifying the Interceptkeybeforedispatching method in Phonewindowmanager.java

/frameworks/base/policy/src/com/android/internal/policy/impl/phonewindowmanager.java

@Override Public long interceptkeybeforedispatching (WindowState win, keyevent event, int policyflags) {final Boole
    An Keyguardon = Keyguardon ();
    Final int keycode = Event.getkeycode ();
    Final int repeatcount = Event.getrepeatcount ();
    Final int metastate = Event.getmetastate ();
    Final int flags = Event.getflags ();
    Final Boolean down = event.getaction () = = Keyevent.action_down;
    Final Boolean canceled = Event.iscanceled ();
    Final Boolean longpress = (Flags & keyevent.flag_long_press)!= 0;
    Final Boolean virtualkey = Event.getdeviceid () = = Keycharactermap.virtual_keyboard;


    
    Final String iscitkeytest=systemproperties.get ("Persist.sys.startCitKeyTest");
        Add a custom key broadcast----start switch (keycode) {case 135:case 136:case 137:case 139:
            
            
            {if (repeatcount = = 0) {Intent mykeyintent = new Intent ();
      if (down) {        Mykeyintent.setaction ("Com.rscja.android.KEY_DOWN");
            else {mykeyintent.setaction ("Com.rscja.android.KEY_UP");
            
            } mykeyintent.putextra ("KeyCode", keycode); 
            
            
          
          Mcontext.sendbroadcastasuser (Mykeyintent, Userhandle.all);
      }} break; ///Add custom key to broadcast----end ..............}

Assigning values to the current focus input box by broadcasting

Modifying the OnCreate () method in Inputmethodservice.java

/frameworks/base/core/java/android/inputmethodservice/inputmethodservice.java

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