java - 抽屉式导航栏未显示

Question

所以从字面上看，我从示例 Android 应用程序中复制了用于抽屉导航的所有内容，在示例应用程序中它显示了，在我的应用程序中则没有。

我将粘贴下面的代码，如果您需要更多文件，请告诉我!

这是代码

public class NavigacijskiIzbornik extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_navigacijski_izbornik);
        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.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 NavigacijaPrviFragment()).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.navigacijski_izbornik, 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) {
        FragmentManager fm = getSupportFragmentManager();
        int id = item.getItemId();

        if (id == R.id.nav_prviLayout) {
            fm.beginTransaction().replace(R.id.content_frame, new NavigacijaDrugiFragment()).commit();

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


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

        } 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;
    }
}

抽屉的 Activity

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <group android:checkableBehavior="single">
        <item android:id="@+id/nav_prviLayout" android:icon="@android:drawable/ic_menu_camera"
            android:title="Import" />
        <item android:id="@+id/nav_drugiLayout" android:icon="@android:drawable/ic_menu_gallery"
            android:title="Gallery" />
        <item android:id="@+id/nav_treciLayout" android:icon="@android:drawable/ic_menu_slideshow"
            android:title="Slideshow" />
        <item android:id="@+id/nav_manage" android:icon="@android:drawable/ic_menu_manage"
            android:title="Tools" />
    </group>

    <item android:title="Communicate">
        <menu>
            <item android:id="@+id/nav_share" android:icon="@android:drawable/ic_menu_share"
                android:title="Share" />
            <item android:id="@+id/nav_send" android:icon="@android:drawable/ic_menu_send"
                android:title="Send" />
        </menu>
    </item>

</menu>

Activity 导航

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">



    <include
        layout="@layout/app_bar_navigacijski_izbornik"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />



    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_navigacijski_izbornik"
        app:menu="@menu/activity_navigacijski_izbornik_drawer" />



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

Answer 1

像下面这样做..

  <RelativeLayout
            android:id="@+id/drawer_container"
            android:layout_width="280dp"
            android:layout_height="match_parent"
            android:layout_gravity="left"
            android:background="@android:color/white"
            android:visibility="visible">

            <include
                android:id="@+id/rel_drawer_app"
                layout="@layout/home_drawer" />
        </RelativeLayout>