5106utils/app/src/main/java/com/example/writeepc/HomeActivity.java

package com.example.writeepc;

import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.RadioButton;
import android.widget.Toast;

import com.example.writeepc.base.BaseActivity;
import com.example.writeepc.base.MyApplication;
import com.handheld.uhfr.UHFRManager;

public class HomeActivity extends BaseActivity {
    private UHFRManager uhfrManager;
    private long exitTime = 0L;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        uhfrManager = UHFRManager.getInstance();
        MyApplication.getApplication().setUhfrManager(uhfrManager);
        RadioButton button1 = this.findViewById(R.id.home_1);
        RadioButton button2 = this.findViewById(R.id.home_2);
        button1.setOnClickListener(v -> {
            startActivity(new Intent(this, ShuangqianActivity.class));
        });
        button2.setOnClickListener(v -> {
            startActivity(new Intent(this, ShuangqianActivity2.class));
        });

    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == 4) {
            if ((System.currentTimeMillis() - exitTime) > 2000) {
                Toast.makeText(getApplicationContext(), "再按一次退出程序", Toast.LENGTH_SHORT).show();
                exitTime = System.currentTimeMillis();
                return true;
            } else {
                finish();
            }
        }
        return false;
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (uhfrManager != null) {
            uhfrManager.close();
            uhfrManager = null;
        }
    }
}