Android 更换导航抽屉中的碎片会使应用程序不断崩溃

我是安卓工作室的乞丐。当我从导航抽屉菜单中选择一个项目时，我正试图打开一个片段，但应用程序一直崩溃

这是我的导航抽屉活动：

package georgia.languagelandscape2;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
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 android.view.View;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;

public class NavigationDrawerActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener, OnMapReadyCallback {

    SupportMapFragment sMapFragment;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        sMapFragment=SupportMapFragment.newInstance();


        setContentView(R.layout.activity_navigation_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.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);

        FragmentManager fm=getSupportFragmentManager();
        fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit();

        sMapFragment.getMapAsync(this);

        android.support.v4.app.FragmentManager sFm=getSupportFragmentManager();
        fm.beginTransaction().replace(R.id.content_frame, new ImportFragment()).commit();
        sFm.beginTransaction().add(R.id.map, sMapFragment).commit();
    }

    @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.navigation_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.

        android.support.v4.app.FragmentManager sFm=getSupportFragmentManager();
        FragmentManager fm=getSupportFragmentManager();

        int id = item.getItemId();

        if(sMapFragment.isAdded())
            sFm.beginTransaction().hide(sMapFragment).commit();

        if (id == R.id.nav_camera) {
            // Handle the camera action
            if(!sMapFragment.isAdded())
                sFm.beginTransaction().add(R.id.map, sMapFragment).commit();
            else
                sFm.beginTransaction().show(sMapFragment).commit();
        } else if (id == R.id.nav_gallery) {

           // ProfileFragment proFrag= new ProfileFragment();
          //  sFm.beginTransaction().show(proFrag).commit()

            FragmentManager fragmentManager = getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

            ProfileFragment myFragment = new ProfileFragment();
            fragmentTransaction.replace(R.id.map, myFragment);
            fragmentTransaction.commit();

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

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

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

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

        }

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

    @Override
    public void onMapReady(GoogleMap googleMap) {
        //markers, locations, everything, here
    }
}

和我的导航抽屉内容xml文件 `

---

正如错误建议的那样，您应该在活动中实现

OnFragmentInteractionListener

public class NavigationDrawerActivity extends AppCompactActivity implements 
          NavigationView.OnNavigationItemSelectedListener,OnMapReadyCallback
         ,ProfileFragment.OnFragmentInteractionListener{ //this need to be implemented

还要重写活动中的方法

 @Override 
  public void onFragmentInteraction(int data){  //method that need to be implemented
   //your implementation
  }

---

另请参见

，因为错误建议您应该在活动中实施

OnFragmentInteractionListener

public class NavigationDrawerActivity extends AppCompactActivity implements 
          NavigationView.OnNavigationItemSelectedListener,OnMapReadyCallback
         ,ProfileFragment.OnFragmentInteractionListener{ //this need to be implemented

还要重写活动中的方法

 @Override 
  public void onFragmentInteraction(int data){  //method that need to be implemented
   //your implementation
  }

---

另请参见发布崩溃日志。.尝试下面的答案它会起作用。.发布崩溃日志。.尝试下面的答案它会起作用。。。