android - bottomappbar android中的抽屉导航

Question

class BottomNavigationDrawerFragment: BottomSheetDialogFragment(), 
   NavigationView.OnNavigationItemSelectedListener {

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_bottomsheet, container, false)
    }

    override fun onNavigationItemSelected(item : MenuItem): Boolean {
        // Bottom Navigation Drawer menu item clicks
        when (item.itemId) {
            R.id.nav1 -> context!!.toast("oneeeeee")
            R.id.nav2 -> context!!.toast("twoooooo")
            R.id.nav3 -> context!!.toast("threeeee")

            return true
        }
        // Add code here to update the UI based on the item selected
        // For example, swap
    }
    override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)

        navigation_view.setNavigationItemSelectedListener(this)

        // Add code here to update the UI based on the item selected
        // For example, swap
    }
}

// This is an extension method for easy Toast call
fun Context.toast(message: CharSequence) {
    val toast = Toast.makeText(this, message, Toast.LENGTH_SHORT)
    toast.setGravity(Gravity.BOTTOM, 0, 600)
    toast.show()
}

我想要实现的是图像中给出的东西。我想在底部应用栏中制作一个 navigation drawer。上面的代码不起作用，它告诉未解析的引用类型 setNavigationItemSelectedListener。我的代码有什么错误？

Answer 1

您应该在 bottomAppbar 中添加抽屉图标，然后为抽屉使用 bottomsheet。

对于你的抽屉，你有两个选择:

1- 遵循谷歌标准并在菜单文件夹中添加抽屉项目(看来你不想要这个)

2- 替换底部工作表中的 fragment ，这样您就可以自定义 fragment 并做任何您喜欢的事情

---------------- 替换底页中的 fragment ------------

你的 activity.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:custom="http://schemas.android.com/tools"
        android:id="@+id/main_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layoutDirection="ltr"
        android:background="@color/white"
        android:orientation="vertical">

            <FrameLayout
                android:id="@+id/bottom_sheet"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:clipToPadding="false"
                android:elevation="6dp"
                android:visibility="visible"
                app:layout_behavior="@string/bottom_sheet_behavior">

                 <FrameLayout
                    android:id="@+id/menu"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="vertical" />
            </FrameLayout>

  </androidx.coordinatorlayout.widget.CoordinatorLayout>

你的 Activity.java

public class Activity extends AppCompatActivity implements 
FragmentNavigation.OnFragmentInteractionListener {
    private CoordinatorLayout coordinatorLayout;
    private View bottomSheet;
    private BottomSheetBehavior<View> behavior;

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

        FrameLayout bottomSheetLayout = (FrameLayout) 
        findViewById(R.id.menu);

        FragmentNavigation fragmentNavigation = new FragmentNavigation();

        androidx.fragment.app.FragmentTransaction fragmentTransaction = 
        getSupportFragmentManager().beginTransaction();

        fragmentTransaction.replace(bottomSheetLayout.getId(), 
        fragmentNavigation, "k");

        fragmentTransaction.commit();


        coordinatorLayout = (CoordinatorLayout) 
        findViewById(R.id.main_content);
        bottomSheet = coordinatorLayout.findViewById(R.id.bottom_sheet);
        behavior = BottomSheetBehavior.from(bottomSheet);
    }

    @Override
    public void onFragmentInteraction(Uri uri) {

    }
}

您的 fragment 导航

    public class FragmentNavigation extends androidx.fragment.app.Fragment {
    private String descriptions;

    public FragmentNavigation () {
    }

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


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        View view = inflater.inflate(R.layout.fragment_navigation, container, false);

        return view;
    }
}

你的 fragment_navigation.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:custom="http://schemas.android.com/tools"
        android:id="@+id/main_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/white"
        android:orientation="vertical">

                <TextView
                    android:id="@+id/bottom_sheet"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:clipToPadding="false"
                    android:elevation="6dp"
                    android:visibility="visible"
                    android:text="here is the navigation menu"
                    app:layout_behavior="@string/bottom_sheet_behavior"/>



      </LinearLayout>