java – How can I apply custom font on custom keyboard in wide applications Android

I have created the Custom keyboard in Android studio. and apply Custom fonts in MainActivity.java, when I run the application custom fonts show in a particular application. But I want to display fonts on wide applications keyboard.
For example -> When a user uses the custom keyboard in any applications like WhatsApp, chrome, etc. Then the user gets the Custom keyboard with custom fonts.

It’s my MainActivity.java file :

package com.example.custom_keyboard;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import java.lang.reflect.Field;
import android.content.Context;
import android.graphics.Typeface;

final class FontsOverride {

    public static void setDefaultFont(Context context,
                                      String staticTypefaceFieldName, String fontAssetName) {
        final Typeface regular = Typeface.createFromAsset(context.getAssets(),
                fontAssetName);
        replaceFont(staticTypefaceFieldName, regular);
    }

    protected static void replaceFont(String staticTypefaceFieldName,
                                      final Typeface newTypeface) {
        try {
            final Field staticField = Typeface.class
                    .getDeclaredField(staticTypefaceFieldName);
            staticField.setAccessible(true);
            staticField.set(null, newTypeface);
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}


public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FontsOverride.setDefaultFont(this, "DEFAULT", "macondo_regular.ttf");
        FontsOverride.setDefaultFont(this, "MONOSPACE", "macondo_regular.ttf");
        setContentView(R.layout.activity_main);
    }
}

It’s my SimpleIME.java class file :

package com.example.custom_keyboard;

import android.content.Intent;
import android.inputmethodservice.InputMethodService;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView;
import android.media.AudioManager;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.InputConnection;

import androidx.annotation.NonNull;


public class SimpleIME extends InputMethodService
        implements KeyboardView.OnKeyboardActionListener {
    private KeyboardView kv;
    private Keyboard keyboard;
    private boolean caps = false;




    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onKeyLongPress(int keyCode, KeyEvent event) {
        return super.onKeyLongPress(keyCode, event);
    }

    @Override
    public void onPress(int i) {

    }

    @Override
    public void onRelease(int i) {

    }

    @Override
    public void onKey(int primaryCode, int[] keyCodes) {
        InputConnection ic = getCurrentInputConnection();
        playClick(primaryCode);
        switch(primaryCode){
            case Keyboard.KEYCODE_DELETE :
                ic.deleteSurroundingText(1, 0);
                break;
            case Keyboard.KEYCODE_SHIFT:
                caps = !caps;
                keyboard.setShifted(caps);
                kv.invalidateAllKeys();
                break;
            case Keyboard.KEYCODE_DONE:
                ic.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER));
                break;
            default:
                char code = (char)primaryCode;
                if(Character.isLetter(code) && caps){
                    code = Character.toUpperCase(code);
                }
                ic.commitText(String.valueOf(code),1);
        }
    }

    @Override
    public void onText(CharSequence charSequence) {

    }

    @Override
    public void sendBroadcastWithMultiplePermissions(@NonNull Intent intent, @NonNull String[] receiverPermissions) {
        super.sendBroadcastWithMultiplePermissions(intent, receiverPermissions);
    }

    @Override
    public void swipeLeft() {

    }

    @Override
    public void swipeRight() {

    }

    @Override
    public void swipeDown() {

    }

    @Override
    public void swipeUp() {

    }

    @Override
    public View onCreateInputView() {
        kv = (KeyboardView)getLayoutInflater().inflate(R.layout.keyboard, null);
        keyboard = new Keyboard(this, R.xml.qwerty);
        kv.setKeyboard(keyboard);

        kv.setOnKeyboardActionListener(this);
        return kv;
    }

    private void playClick(int keyCode) {
        AudioManager am = (AudioManager) getSystemService(AUDIO_SERVICE);
        switch (keyCode) {
            case 32:
                am.playSoundEffect(AudioManager.FX_KEYPRESS_SPACEBAR);
                break;
            case Keyboard.KEYCODE_DONE:
            case 10:
                am.playSoundEffect(AudioManager.FX_KEYPRESS_RETURN);
                break;
            case Keyboard.KEYCODE_DELETE:
                am.playSoundEffect(AudioManager.FX_KEYPRESS_DELETE);
                break;
            default:
                am.playSoundEffect(AudioManager.FX_KEYPRESS_STANDARD);
        }
    }
}

It’s my keyboard.xml file :

<?xml version="1.0" encoding="UTF-8"?>
<android.inputmethodservice.KeyboardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/keyboard"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:keyPreviewLayout ="@layout/preview"
    />

It’s my themes.xml file :

<resources xmlns:tools="http://schemas.android.com/tools">
    <style name="Theme.Custom_keyboard" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
        <item name="android:typeface">monospace</item>
    </style>

</resources>

I have searched a lot but have not gotten any references related to it if anyone has any idea about the same please guide me.