How does the Android app suppress the pop-up Input Panel during the entire app run?

You onCreate can completely disable the soft keyboard by adding the following code to your activity's function:

GetWindow (). SetFlags (WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM,                WindowManager.LayoutParams.FLAG_ALT _FOCUSABLE_IM);

So you can write a base class if you want to take the global effect, for example:

 public  abstract  class  basenoimactivity extends   appcompatactivity {@Override  protected    void   OnCreate (@Nullable Bundle savedinstancestate) { super  .oncreate (savedinstancestate); GetWindow (). SetFlags (WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM, WindowManager.LayoutParams.FLAG_ALT_        FOCUSABLE_IM);    Oncreatestarted (savedinstancestate);  protected  abstract  void   oncreatestarted (@Nullable Bundle savedinstancestate);}  

Then any activity will inherit it, if your project already has a base class, then insert the above code into the base class, the demo example:

 Public class extends basenoimactivity {// inherit base class     @Override    protectedvoid  oncreatestarted (@Nullable Bundle savedinstancestate) {        setcontentview (r.layout.activity_test);        LOG.E ("test", "Testactivity is started");}    }

Referenced from: https://segmentfault.com/q/1010000008489927/a-1020000008490261/revision

How does the Android app suppress the pop-up Input Panel during the entire app run?