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BottomAppBar,其中BottomNavigationDrawer连接到NavigationController

android-architecture-navigation android-architecture-components kotlin android

3

RediOne1 · 技术社区 · 6 年前

MainFragment BottomNavigationDrawer
当用户选择某个菜单项,或单击他被转移到另一个片段,比方说 DebtDetailsFragment . 那么汉堡包就应该用“后箭头”代替了 NavigationController

下面我贴上了我的 MainActivity 代码。当我用导航控制器注释行时,汉堡包图标是可见的能够显示。

但当我取消这行的注释时,汉堡就消失了,因为 导航控制器 NavigationView 底部导航抽屉 DrawerLayout 所以控制员认为不需要汉堡包。

方法 setupWithNavController 抽屉布局 作为我不使用的参数。

此方法的文档:

当您在非根目标上时,工具栏还将显示向上按钮,当您在根目标上时,工具栏将显示抽屉图标,并在它们之间自动设置动画。单击导航图标时,此方法将调用[DrawerLayout.navigateUp]。

导航控制器 BottomAppBar 但是没有 ? 我要自己动手做汉堡包 onOptionsItemSelected 方法。

class MainActivity : BaseActivity() {

    @Inject
    lateinit var viewModelProvider: ViewModelProvider.Factory

    private val viewModel: MainActivityViewModel by lazy {
        ViewModelProviders.of(this, viewModelProvider).get(MainActivityViewModel::class.java)
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setSupportActionBar(bottomAppBar)
        val navController = findNavController(R.id.main_nav_host_fragment)
        //bottomAppBar.setupWithNavController(navController)

        onDestroyDisposables += viewModel.uiStateObservable
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(::render, Timber::e)
    }

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        menuInflater.inflate(R.menu.bottomappbar_menu, menu)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
        when (item?.itemId) {
            android.R.id.home -> {
                val bottomNavDrawerFragment = BottomNavigationDrawerFragment()
                bottomNavDrawerFragment.show(supportFragmentManager, bottomNavDrawerFragment.tag)
            }
        }
        return super.onOptionsItemSelected(item)
    }

    override fun onSupportNavigateUp(): Boolean {
        return findNavController(R.id.main_nav_host_fragment).navigateUp()
    }
}

底部导航抽屉

带导航控制器-汉堡包隐形。

1 回复 | 直到 6 年前

1

3

ianhanniballake 6 年前

这个 BottomAppBar 决不应按显示向上按钮 anatomy of the BottomAppBar -它应该只显示抽屉图标。如图所示 behavior documentation ,向上按钮应显示在顶部 Toolbar .

bottomAppBar.setupWithNavController(navController) ,但不是打电话 setupWithNavController(navController) 工具栏 你有。

底部AppBar handle clicks on the drawer icon 你自己。

这个 DrawerArrowDrawable 类提供正确的抽屉图标:

val icon = DrawerArrowDrawable(bottomAppBar.context)
bottomAppBar.navigationIcon = icon

2

0

Dilanka Laksiri 5 年前

主活动.java

public class MainActivity extends AppCompatActivity {

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

        BottomAppBar bottomAppBar = findViewById(R.id.bottomAppBar);
        setSupportActionBar(bottomAppBar);

        FloatingActionButton fab = 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();
            }
        });

        NavigationView navigationView = findViewById(R.id.nav_view);
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupWithNavController(navigationView, navController);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

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

活动\u main.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"
    tools:openDrawer="start">

    <include
        layout="@layout/app_bar_main"
        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:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</androidx.drawerlayout.widget.DrawerLayout>

<?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=".MainActivity">

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

    <com.google.android.material.bottomappbar.BottomAppBar
        android:id="@+id/bottomAppBar"
        android:layout_width="match_parent"
        android:layout_height="?actionBarSize"
        android:layout_gravity="bottom"
        app:fabCradleVerticalOffset="16dp"
        app:navigationIcon="@drawable/ic_baseline_menu_24"
        app:navigationContentDescription="@string/nav_header_desc"
        app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
        style="@style/Widget.MaterialComponents.BottomAppBar.Colored"/>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_menu_send"
        app:layout_anchor="@id/bottomAppBar"/>

</androidx.coordinatorlayout.widget.CoordinatorLayout>