FragmentTransaction中的replace（int，android.app.Fragment）无法应用于（int，com.example.talktome.fragments.FragmentProfile）

Question

我试图在navigation_drawer中进行一些转换。但是发生了一些问题。我想这发生在进口中。请帮我修复它

这是我的导航抽屉的主要活动

package com.example.talktome;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
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;
import com.example.talktome.fragments.FragmentChat;
import com.example.talktome.fragments.FragmentProfile;
import com.example.talktome.fragments.FragmentSend;
import com.example.talktome.fragments.FragmentShare;
import com.example.talktome.fragments.FragmentTools;
public class DrawerActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {
    FragmentChat fchat;
    FragmentProfile fprofile;
    FragmentSend fsend;
    FragmentShare fshare;
    FragmentTools ftools;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_drawer);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
        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);
        fchat = new FragmentChat();
        fprofile = new FragmentProfile();
        fsend = new FragmentSend();
        fshare = new FragmentShare();
        ftools = new FragmentTools();
    }
    @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.drawer, 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();
        FragmentTransaction ftrans = getFragmentManager().beginTransaction();
        if (id == R.id.profile) {
            ftrans.replace(R.id.container, fprofile);// fprofile has got error
        } else if (id == R.id.message) {
            ftrans.replace(R.id.container, fchat);// fchat has got 
        } else if (id == R.id.nav_manage) {
            ftrans.replace(R.id.container, ftools);ftools has got 
        } else if (id == R.id.nav_share) {
            ftrans.replace(R.id.container, fshare);fshare has got 
        } else if (id == R.id.nav_send) {
            ftrans.replace(R.id.container, fsend);fsend has got 
        } ftrans.commit();
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

错误是：FragmentTransaction中的replace（int，android.app.Fragment）无法应用于（int， com.example.talktome.fragments.FragmentProfile）