ht_gate/app/src/main/java/com/ht/gate/activity/MainActivity.java

package com.ht.gate.activity;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;

import com.ht.gate.PasswordDialog;
import com.ht.gate.R;
import com.ht.gate.UnlockView;

import butterknife.BindView;
import butterknife.ButterKnife;

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.unlock_view)
    UnlockView unlockView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        unlockView.setUnlockListener(() -> {
            PasswordDialog passwordDialog = new PasswordDialog(MainActivity.this);
            passwordDialog.show();
        });
    }

    @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);
    }
}