BottomNavigationView项目单击不适用于NavigationView

Question

我遇到的问题与here之前的问题类似，但未得到答复。

我不能在同一活动中使用NavigationView和BottomNavigationView。 我在menu.xml文件夹中有两个menu，并给menu.xml和NavigationView赋予了不同的BottomNavigationView。 NavigationView点击监听器正在工作。 BottomNavigationView点击监听器不起作用。即使单击其他选项卡，BottomNavigationView的第一个选项卡也始终处于选中状态。 请尽快帮助我。

  

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawableLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <FrameLayout
            android:id="@+id/frameLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
        <!--Bottom Navigation: show menu-->
        <android.support.design.widget.BottomNavigationView
            android:id="@+id/bottom_nav"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:background="?android:attr/windowBackground"
            app:menu="@menu/bottom_menu" />
    </RelativeLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/side_nav"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        ads:menu="@menu/side_menu"
        app:headerLayout="@layout/nav_header" />

</android.support.v4.widget.DrawerLayout>

  

MainActivity.java

public class MainActivity extends AppCompatActivity {

    DrawerLayout mDrawerLayout;
    NavigationView mSideNav;
    ActionBarDrawerToggle mToggle;
    BottomNavigationView mBottomNav;

    private FrameLayout mFrmLayout;

    ActionBar actionBar;

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

        actionBar = getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);

        mDrawerLayout = findViewById(R.id.drawableLayout);
        mBottomNav = findViewById(R.id.bottom_nav);
        mSideNav = findViewById(R.id.side_nav);

        mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close);
        mDrawerLayout.setDrawerListener(mToggle);
        mToggle.syncState();

        //bottom navigation
        mBottomNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
                int id = menuItem.getItemId();
                switch (id) {
                    case R.id.nav_home:
                        //home fragment transaction
                        actionBar.setTitle("Home");
                        Toast.makeText(MainActivity.this, "Home", Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.nav_downloading:
                        //profile fragment transaction
                        actionBar.setTitle("Downloading");//change actionbar title
                        Toast.makeText(MainActivity.this, "Downloading", Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.nav_completed:
                        //users fragment transaction
                        actionBar.setTitle("Completed");//change actionbar title
                        Toast.makeText(MainActivity.this, "Completed", Toast.LENGTH_SHORT).show();
                        break;
                }
                return false;
            }
        });

        //side navigation
        mSideNav.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
                // Handle mNavgnView view item clicks here.
                int id = menuItem.getItemId();
                switch (id) {
                    case R.id.nav_home:
                        actionBar.setTitle("Home");
                        Toast.makeText(MainActivity.this, "Home", Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.nav_downloading:
                        actionBar.setTitle("Downloading");
                        Toast.makeText(MainActivity.this, "Downloading", Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.nav_completed:
                        actionBar.setTitle("Completed");
                        Toast.makeText(MainActivity.this, "Completed", Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.nav_bookmarks:
                        actionBar.setTitle("Bookmarks");
                        Toast.makeText(MainActivity.this, "Bookmarks", Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.nav_history:
                        actionBar.setTitle("History");
                        Toast.makeText(MainActivity.this, "History", Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.nav_about:
                        actionBar.setTitle("About");
                        Toast.makeText(MainActivity.this, "About", Toast.LENGTH_SHORT).show();
                        break;
                }

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


        actionBar.setTitle("Home");

    }

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (item.getItemId() == android.R.id.home) {
            if (mDrawerLayout.isDrawerOpen(Gravity.LEFT)) {
                mDrawerLayout.closeDrawer(Gravity.LEFT);
            } else {
                mDrawerLayout.openDrawer(Gravity.LEFT);
            }
        }

        return super.onOptionsItemSelected(item);
    }
}