如何在同一活动中为底部导航和导航抽屉创建侦听器？

Question

//这是我的Java代码

public class HomeActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

    BottomNavigationView bottomNavigationView;
    NavigationView navigationView;

    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener = new BottomNavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull final MenuItem item) {
            switch (item.getItemId()) {
                case R.id.home:
                    HomeFragment homeFragment=new HomeFragment();
                    android.support.v4.app.FragmentTransaction fragmentTransaction=getSupportFragmentManager().beginTransaction();
                    fragmentTransaction.replace(R.id.frameLayout,homeFragment).commit();
                    return true;

                case R.id.navigation_stylist:
                    StylistFragment stylistsFragment=new StylistFragment();
                    android.support.v4.app.FragmentTransaction fragmentTransaction1=getSupportFragmentManager().beginTransaction();
                    fragmentTransaction1.replace(R.id.frameLayout,stylistsFragment).commit();
                    return true;

                case R.id.navigation_apps:
                    MyapptsFragment myaaptsFragment=new MyapptsFragment();
                    android.support.v4.app.FragmentTransaction fragmentTransaction2=getSupportFragmentManager().beginTransaction();
                    fragmentTransaction2.replace(R.id.frameLayout,myaaptsFragment).commit();
                    return true;

                case R.id.navigation_tips:
                    HairtipsFragment hairtipsFragment=new HairtipsFragment();
                    android.support.v4.app.FragmentTransaction fragmentTransaction3=getSupportFragmentManager().beginTransaction();
                    fragmentTransaction3.replace(R.id.frameLayout,hairtipsFragment).commit();
                    return true;

                case R.id.navigation_account:
                    AccountFragment accountFragment=new AccountFragment();
                    android.support.v4.app.FragmentTransaction fragmentTransaction4=getSupportFragmentManager().beginTransaction();
                    fragmentTransaction4.replace(R.id.frameLayout,accountFragment).commit();

                    return true;
            }
            return false;
        }
    };


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

        //start onboarding when app is opening first time
        isUserFirstTime = Boolean.valueOf(Utils.readSharedSetting(HomeActivity.this, PREF_USER_FIRST_TIME, "true"));
        Intent introIntent = new Intent(HomeActivity.this, OnboardingActivity.class);
        introIntent.putExtra(PREF_USER_FIRST_TIME, isUserFirstTime);

        if (isUserFirstTime)
            startActivity(introIntent);

        setContentView(R.layout.activity_home);

        bottomNavigationView = findViewById(R.id.bottom_navigation);
        navigationView=findViewById(R.id.nav_drawer);


        //bottom navigationview listener
        bottomNavigationView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
        BottomNavigationViewHelper.disableShiftMode(bottomNavigationView);

        //navigation drawer listener
        navigationView.setNavigationItemSelectedListener(this);


        //open home fragment on first launch
        HomeFragment homeFragment=new HomeFragment();
        android.support.v4.app.FragmentTransaction fragmentTransaction=getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.frameLayout,homeFragment).commit();

    }


    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()) {
            case R.id.nav_home:
                HomeFragment homeFragment=new HomeFragment();
                android.support.v4.app.FragmentTransaction fragmentTransaction=getSupportFragmentManager().beginTransaction();
                fragmentTransaction.replace(R.id.frameLayout,homeFragment).commit();
                return true;

            case R.id.nav_products:
                StylistFragment stylistsFragment=new StylistFragment();
                android.support.v4.app.FragmentTransaction fragmentTransaction1=getSupportFragmentManager().beginTransaction();
                fragmentTransaction1.replace(R.id.frameLayout,stylistsFragment).commit();
                return true;

            case R.id.nav_promotions:
                MyapptsFragment myaaptsFragment=new MyapptsFragment();
                android.support.v4.app.FragmentTransaction fragmentTransaction2=getSupportFragmentManager().beginTransaction();
                fragmentTransaction2.replace(R.id.frameLayout,myaaptsFragment).commit();
                return true;

            case R.id.nav_purchases:
                HairtipsFragment hairtipsFragment=new HairtipsFragment();
                android.support.v4.app.FragmentTransaction fragmentTransaction3=getSupportFragmentManager().beginTransaction();
                fragmentTransaction3.replace(R.id.frameLayout,hairtipsFragment).commit();
                return true;

            case R.id.nav_settings:
                AccountFragment accountFragment=new AccountFragment();
                android.support.v4.app.FragmentTransaction fragmentTransaction4=getSupportFragmentManager().beginTransaction();
                fragmentTransaction4.replace(R.id.frameLayout,accountFragment).commit();
                return true;
        }
        return false;
    }
}

//这是我的xml

<?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">

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_drawer"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:theme="@style/menu_text_style"
        app:menu="@menu/navigation_drawer" />

    <!--app:headerLayout="@layout/nav_header_main"-->

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <FrameLayout
            android:id="@+id/frameLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_above="@+id/shadow"
            android:animateLayoutChanges="true">

        </FrameLayout>

        <View
            android:id="@+id/shadow"
            android:layout_width="match_parent"
            android:layout_height="@dimen/_1sdp"
            android:layout_above="@id/bottom_navigation"
            android:background="@color/shadow"/>


        <android.support.design.widget.BottomNavigationView
            android:id="@+id/bottom_navigation"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            app:itemIconTint="@color/navigationitem"
            app:itemTextColor="@color/navigationitem"
            app:menu="@menu/navigation_item"/>
    </RelativeLayout>

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

我想在同一活动中创建导航抽屉和底部导航。我现在创建了XML设计，我必须为两者都编写Java代码。底部导航正常运行，但是导航项clicklistener无法正常工作。我为导航抽屉和底部导航创建了片段。当我单击导航抽屉中的项目时，它不会重定向到相应的片段。给定的clicklistener用于导航抽屉根本无法工作。

Answer 1

解决方案：

请尝试以下步骤使其正常工作：

第一步：实施 int[] array = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 5 }; int i = 0; for (; i < array.length; i++) { if (array[i] > 0) break; } for (; i < array.length; i++) { System.out.print(array[i]); } ，如下所示：

onNavigationItemSelected

第二步：使用界面生成的方法为：

.... extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { 

第3步：：在您的类中声明一个全局变量：

@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
    switch (item.getItemId()) {
        case R.id.your_drawer_item_id:
            ....
            ....
        case R.id.your_drawer_item_id:
            ....
            ....
    }
}

第4步：在您的public NavigationView navigationView; 中，将变量初始化为：

onCreate()

最后：：设置导航视图：

navigationView = (NavigationView) findViewById(R.id.your_nav_view);

就是这样。

希望它能起作用。

DrawerLayout xml：

navigationView.setNavigationItemSelectedListener(this);

app_bar_vendor_drawer_layout xml

<?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_vendor_drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_drawer_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@color/White"
        android:fitsSystemWindows="true"
        app:itemBackground="@android:color/white"
        app:itemIconTint="@color/bottom_color"
        app:itemTextColor="@color/bottom_color"
        app:headerLayout="@layout/nav_header_vendor_drawer_layout"
        app:menu="@menu/vendor_drawer_menu" >

    </android.support.design.widget.NavigationView>

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

尝试一下。

Answer 2

您可以使用以下方法在同一活动上使用该方法来检索MenuItem参数：

private void myClickItem(MenuItem item){
    switch (item.getItemId()) {
        case R.id.bottom_home:
            // DO SOMETHING
            break;

        case R.id.drawer_main:
            // DO SOMETHING
            break;
      }
}

然后，像这样呼叫：

BottomNavigationView bottomNavigationView =  findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(item -> { // using lamda
     myClickItem(item); //call here
     return true;
});

NavigationView navigationView = findViewById(R.id.nv);
navigationView.setNavigationItemSelectedListener(item -> {
    myClickItem(item); // call the same method here

    drawerLayout.closeDrawers(); // bonus: hide navigation after click
    return false;
});

您不需要修改xml资源，就可以正常工作。