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java - 更改导航抽屉的汉堡图标侧

问题描述

我为侧边菜单抽屉使用了一个 Android Studio 模板。

问题：我希望整个抽屉出现在右侧。

进展：我可以将 android:layout_gravity 更改为“结束”以进行抽屉布局，但我无法将 ActionBar 中的三行图标（也称为架子、汉堡或导航抽屉图标）移动到右侧。

视觉来源也许可以更好地理解我的问题： 抽屉在右边，但不是汉堡图标

代码来了：

抽屉活动（Lecture_graph.java）：

public class Lectures_graph extends AppCompatActivity implements course_list.OnFragmentInteractionListener, lectures_graph.OnFragmentInteractionListener{

    private AppBarConfiguration mAppBarConfiguration;

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

        setContentView(R.layout.activity_lectures_graph);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_course_list, R.id.nav_lectures_greph)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);
    }

    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }

    @Override
    public void onFragmentInteraction(Uri uri) {

    }
}

此活动的 XML (activity_lecture_graph.xml)：

    <?xml version="1.0" encoding="utf-8"?>
    <androidx.drawerlayout.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"
//this lets drawer to be on right
        tools:openDrawer="end">

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

        <com.google.android.material.navigation.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:background="#fff"
            android:fitsSystemWindows="true"
            app:headerLayout="@layout/nav_header_lectures_graph"
            app:menu="@menu/activity_lectures_graph_drawer"
//this allows drawer to be on right
android:layout_gravity="end" />

    </androidx.drawerlayout.widget.DrawerLayout>

应用栏布局（app_bar_lectures_graph.xml）：

 <?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".systems.lectures.Lectures_graph">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </com.google.android.material.appbar.AppBarLayout>

    <include layout="@layout/content_lectures_graph" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

抽屉 xml (activity_lectures_graph_drawer.xml)：

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".systems.lectures.Lectures_graph">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </com.google.android.material.appbar.AppBarLayout>

    <include layout="@layout/content_lectures_graph" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

将感谢任何帮助。

标签： javaandroidtogglebuttondrawerlayoutdrawer

解决方案

你可以使用ActionBarDrawerToggle. 试试这个（科特林）：

 val toggle = ActionBarDrawerToggle(
        this, drawer_layout, toolbar,
        R.string.navigation_drawer_open,
        R.string.navigation_drawer_close
    )
    toggle.isDrawerIndicatorEnabled = false
    toggle.setHomeAsUpIndicator(R.drawable.ic_menu_black_24dp)
    toggle.setToolbarNavigationClickListener {
        if (drawer .isDrawerVisible(GravityCompat.START)) {
            drawer .closeDrawer(GravityCompat.START)
        } else {
            drawer .openDrawer(GravityCompat.START)
        }
    }
    drawer .addDrawerListener(toggle)
    toggle.syncState()

对于（Java）

 Toolbar toolbar = findViewById(R.id.toolbar);

 DrawerLayout drawer = findViewById(R.id.drawer_layout);

 ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar,
            R.string.navigation_drawer_open,
            R.string.navigation_drawer_close
    );
    toggle.setDrawerIndicatorEnabled(false);
    toggle.setHomeAsUpIndicator(R.drawable.ic_menu_black_24dp);
    toggle.setToolbarNavigationClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            if (drawer .isDrawerVisible(GravityCompat.START)) {
                drawer .closeDrawer(GravityCompat.START);
            } else {
                drawer .openDrawer(GravityCompat.START);
            }


        }
    });

    drawer .addDrawerListener(toggle);
    toggle.syncState();

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