Question

所以我开始了一个新项目并实现了BottomNavigationView，我创建了一个类帮助器，BottomNavigationViewHelper使按钮保持原样，除了导航视图中的按钮必须两次点击工作之外，一切都工作正常单击一下。如果我单击按钮，它只会突出显示它，然后我必须再次单击它才能访问class / xml。

这是Helper Class的代码

 public class BottomNavigationViewHelper {
        @SuppressLint("RestrictedApi")
        public static void disableShiftMode(BottomNavigationView view) {
            BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
            try {
                Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
                shiftingMode.setAccessible(true);
                shiftingMode.setBoolean(menuView, false);
                shiftingMode.setAccessible(false);
                for (int i = 0; i < menuView.getChildCount(); i++) {
                    BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
                    //noinspection RestrictedApi
                    item.setShiftingMode(false);
                    // set once again checked value, so view will be updated
                    //noinspection RestrictedApi
                    item.setChecked(item.getItemData().isChecked());
                }
            } catch (NoSuchFieldException e) {
                Log.e("BNVHelper", "Unable to get shift mode field", e);
            } catch (IllegalAccessException e) {
                Log.e("BNVHelper", "Unable to change value of shift mode", e);
            }
        }
 public static void enableNavigation(final Context context, BottomNavigationView view){
        view.setOnNavigationItemReselectedListener(new BottomNavigationView.OnNavigationItemReselectedListener() {
            @Override
            public void onNavigationItemReselected(@NonNull MenuItem item) {
                switch (item.getItemId()){

                    case R.id.ic_house:
                        Intent intent1=new Intent(context, HomeActivity.class); //ACTIVITY_NUM=0
                        context.startActivity(intent1);
                        break;

                    case R.id.ic_search:
                        Intent intent2=new Intent(context, SearchActivity.class);//ACTIVITY_NUM=1
                        context.startActivity(intent2);
                        break;

                    case R.id.ic_circle:
                        Intent intent3=new Intent(context, PicActivity.class);//ACTIVITY_NUM=2
                        context.startActivity(intent3);
                        break;

                    case R.id.ic_alert:
                        Intent intent4=new Intent(context, AlertActivity.class);//ACTIVITY_NUM=3
                        context.startActivity(intent4);
                        break;

                    case R.id.ic_android:
                        Intent intent5=new Intent(context, ProfileActivity.class);//ACTIVITY_NUM=4
                        context.startActivity(intent5);
                        break;

                }
            }
        });
    }
}

这是个人资料类

public class ProfileActivity extends AppCompatActivity {
    private Context mContext= ProfileActivity.this;
    private static final int ACTIVITY_NUM=4;
    private static final String TAG ="ProfileActivity";

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_profile);
        setupToolbar();
        BottomNavigationView bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottomNavViewBar);
        BottomNavigationViewHelper.disableShiftMode(bottomNavigationView);
        BottomNavigationViewHelper.enableNavigation(mContext, bottomNavigationView);
        Menu menu=bottomNavigationView.getMenu();
        MenuItem menuItem=menu.getItem(ACTIVITY_NUM);
        menuItem.setChecked(true);
        Log.d(TAG, "onCreate: started.");
    }

    private void setupToolbar(){

        Toolbar toolbar=(Toolbar) findViewById(R.id.profileToolBar);
        setSupportActionBar(toolbar);
        toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Log.d(TAG,"onMenuItemClick:clicked menu item: "+item);

                switch (item.getItemId()){
                    case R.id.profileMenu:
                        Log.d(TAG,"onMenuItemClick: Navigating to profile preferences.");
                }

                return false;
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.profile_menu, menu);
        return true;
    }
}

最后是xml

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:layout_alignParentBottom="true">

    <android.support.design.widget.BottomNavigationView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/bottomNavViewBar"
        android:background="@drawable/white_grey_border_top"
        app:menu="@menu/bottom_navigation_menu"
        app:itemIconTint="@color/teal"
        android:clickable="true"
        android:focusable="true">

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

</RelativeLayout>

</merge>

非常感谢任何帮助。

Answer 1

要注册SelectListener，而不是重新 selectListener！

public static void enableNavigation(final Context context, BottomNavigationView view){
        view.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public void onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId()){

BottomNavigationView无法单击 - 必须单击两次

1 个答案: