ht_gate/app/src/main/java/com/ht/gate/LoginActivity.java

package com.ht.gate;

import androidx.appcompat.app.AppCompatActivity;
import androidx.constraintlayout.widget.ConstraintLayout;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;

import com.ht.gate.activity.MainActivity;

import butterknife.BindView;
import butterknife.ButterKnife;

public class LoginActivity extends AppCompatActivity {

    @BindView(R.id.parent_layout)
    ConstraintLayout parentLayout;
    @BindView(R.id.keyboard_view)
    CustomKeyboardView keyboardView;
    @BindView(R.id.et)
    EditText et;
    @BindView(R.id.unlock_view)
    UnlockView unlockView;

    private boolean captalize;
    private KeyboardUtil keyboardUtil;

    @SuppressLint("ClickableViewAccessibility")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        ButterKnife.bind(this);

        unlockView.setUnlockListener(() -> {
            unlockView.setVisibility(View.GONE);
            et.setVisibility(View.VISIBLE);
            keyboardView.show();
        });
        et.setOnTouchListener((v, event) -> {
            if (event.getAction() == MotionEvent.ACTION_UP) {
                if (keyboardView.getVisibility() == View.GONE) {
                    keyboardView.show();
                }
            }
            return true;
        });
        keyboardView.setKeyboardActionListener(new CustomKeyboardView.OnKeyboardActionListener() {
            @Override
            public void onPress(int primaryCode) {

            }

            @Override
            public void onRelease(int primaryCode) {

            }

            @Override
            public void onKey(int primaryCode, int[] keyCodes) {
                Log.d("onKey", primaryCode + "");
                Editable editable = et.getText();
                int start = et.getSelectionStart();
                switch (primaryCode) {
                    case CustomKeyboardView.KEYCODE_SHIFT:
                        captalize = !captalize;
                        break;
                    case CustomKeyboardView.KEYCODE_CANCEL:
                        keyboardView.hide();
                        et.setVisibility(View.GONE);
                        unlockView.setVisibility(View.VISIBLE);
                        break;
                    case CustomKeyboardView.KEYCODE_DONE:
                        startActivity(new Intent(LoginActivity.this, MainActivity.class));
                        break;
                    case CustomKeyboardView.KEYCODE_DELETE:
                        if (editable != null && editable.length() > 0) {
                            if (start > 0) {
                                editable.delete(start - 1, start);
                            }
                        }
                        break;
                    default:
                        String str = Character.toString((char) primaryCode);
                        editable.insert(start, captalize ? str.toUpperCase() : str.toLowerCase());
                        break;
                }
            }

            @Override
            public void onText(CharSequence text) {

            }
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
        View decorView = getWindow().getDecorView();
        int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_IMMERSIVE;
        decorView.setSystemUiVisibility(uiOptions);
    }
}