안드로이드 스튜디오 오류 - 조각 - 탐색 서랍

Question

나는 다음과 같은 오류 얻을 응용 프로그램을 실행하는 경우 :

10-20 14:47:22.829 29044-29044/com.example.ivanp.meteostanica E/AndroidRuntime: FATAL EXCEPTION: main 
                      Process: com.example.ivanp.meteostanica, PID: 29044 
                      java.lang.ClassCastException: android.support.v7.widget.AppCompatTextView cannot be cast to android.view.ViewGroup 
                       at android.support.v4.app.BackStackRecord.configureTransitions(BackStackRecord.java:1153) 
                       at android.support.v4.app.BackStackRecord.beginTransition(BackStackRecord.java:1060) 
                       at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:662) 
                       at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617) 
                       at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517) 
                       at android.os.Handler.handleCallback(Handler.java:739) 
                       at android.os.Handler.dispatchMessage(Handler.java:95) 
                       at android.os.Looper.loop(Looper.java:148) 
                       at android.app.ActivityThread.main(ActivityThread.java:5551) 
                       at java.lang.reflect.Method.invoke(Native Method) 
                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730) 
                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620) 

내가 안드로이드 스튜디오에 새로 온 사람과 난 그냥이 튜토리얼 다음되었습니다 https://www.youtube.com/watch?v=H4R-hz56oBA

이를

:이 TvrdjavaFragment.java입니다

package com.example.ivanp.meteostanica; 

import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v4.app.FragmentManager; 
import android.view.View; 
import android.support.design.widget.NavigationView; 
import android.support.v4.view.GravityCompat; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarDrawerToggle; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.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.activity_main); 
     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.main, 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_tvrdjava) { 
      TvrdjavaFragment tvrdjavaFragment = new TvrdjavaFragment(); //Create object from Fragment 
      FragmentManager manager = getSupportFragmentManager(); 
      manager.beginTransaction().replace(R.id.relativeLayoutFragment, 
        tvrdjavaFragment, 
        tvrdjavaFragment.getTag()).commit(); 


     } else if (id == R.id.nav_bubanj) { 

     } else if (id == R.id.nav_celekula) { 

     } else if (id == R.id.nav_cegar) { 

     } else if (id == R.id.nav_podesavanja) { 

     } else if (id == R.id.nav_onama) { 

     } 

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

다음 MainActivity.java입니다

무엇이 문제입니까? Tvrdjava 텍스트 조각을 탐색 창에서 Tvrdjava를 선택하면 보여 주기만하면됩니다.

난 그냥이 사용하는 데 필요한

Answer 1

:

TvrdjavaFragment tvrdjavaFragment = new TvrdjavaFragment(); 
     FragmentTransaction tvrdjavaFragmentTransaction = getSupportFragmentManager().beginTransaction(); 
     tvrdjavaFragmentTransaction.replace(R.id.frame, tvrdjavaFragment); 
     tvrdjavaFragmentTransaction.commit();