我試圖弄清楚如何在應(yīng)用程序啟動(dòng)時(shí)更改加載的 xml。當(dāng)前它打開(kāi) activity_main.xml。有沒(méi)有辦法讓?xiě)?yīng)用程序打開(kāi)我的 info.xml（也在我的側(cè)邊導(dǎo)航欄中）而不創(chuàng)建新活動(dòng)？更改了 setcontentview 的主要活動(dòng)代碼：package com.example.cubehelppp;import android.os.Bundle;import androidx.fragment.app.FragmentManager;import com.google.android.material.navigation.NavigationView;import androidx.core.view.GravityCompat;import androidx.drawerlayout.widget.DrawerLayout;import androidx.appcompat.app.ActionBarDrawerToggle;import androidx.appcompat.app.AppCompatActivity;import androidx.appcompat.widget.Toolbar;import android.view.Menu;import android.view.MenuItem;    public class MainActivity extends AppCompatActivity            implements NavigationView.OnNavigationItemSelectedListener {        @Override        protected void onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            setContentView(R.layout.info);            Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);            setSupportActionBar(toolbar);    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);    drawer.addDrawerListener(toggle);    toggle.syncState();    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);    navigationView.setNavigationItemSelectedListener(this);}@Overridepublic void onBackPressed() {    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);    if (drawer.isDrawerOpen(GravityCompat.START)) {        drawer.closeDrawer(GravityCompat.START);    } else {        super.onBackPressed();    }}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {    // Inflate the menu; this adds items to the action bar if it is present.    getMenuInflater().inflate(R.menu.main, menu);    return true;}