错第二参数类型，方法FragmentTransaction不适用

Question

我不能manager.beginTransaction下建立了对应的代码..其表示红线（）代替（R.id.relativelayout_for_fragment，attendanceFragment）.commit（）;我能做什么？

public class HomeActivity extends AppCompatActivity 
     implements NavigationView.OnNavigationItemSelectedListener { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_home); 
     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); 
    } 

    @Override 
    public void onBackPressed() { 
     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     if (drawer.isDrawerOpen(GravityCompat.START)) { 
      drawer.closeDrawer(GravityCompat.START); 
     } else { 
      super.onBackPressed(); 
     } 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.home, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    @SuppressWarnings("StatementWithEmptyBody") 
    @Override 
    public boolean onNavigationItemSelected(MenuItem item) { 
     // Handle navigation view item clicks here. 
     int id = item.getItemId(); 

     if (id == R.id.nav_attendance) { 
      Toast.makeText(HomeActivity.this, "Attendance", Toast.LENGTH_SHORT).show(); 
      AttendanceFragment attendanceFragment = new AttendanceFragment(); 
      FragmentManager manager = getSupportFragmentManager(); 
      manager.beginTransaction().replace(R.id.relativelayout_for_fragment, attendanceFragment).commit(); 



     } else if (id == R.id.nav_marklist) { 
      Toast.makeText(HomeActivity.this, "Mark List", Toast.LENGTH_SHORT).show(); 
     } else if (id == R.id.nav_studentdetails) { 
      Toast.makeText(HomeActivity.this, "Student Details", Toast.LENGTH_SHORT).show(); 
     } else if (id == R.id.nav_settings) { 
      Toast.makeText(HomeActivity.this, "Settings", Toast.LENGTH_SHORT).show(); 
     } else if (id == R.id.nav_sendsms) { 
      Toast.makeText(HomeActivity.this, "Send SMS", Toast.LENGTH_SHORT).show(); 
     } else if (id == R.id.nav_about) { 
      Toast.makeText(HomeActivity.this, "About", Toast.LENGTH_SHORT).show(); 
     } 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     drawer.closeDrawer(GravityCompat.START); 
     return true; 
    } 
} 

Answer 1

replace方法具有以下签名

replace(int containerViewId, Fragment fragment) 

所以第二个参数预计instanceof片段。所以，你应该AttendanceFragment扩展Fragment类