无法在Android应用中打开导航抽屉中的外部URL。之前工作正常

Question

我想我在某个地方搞砸了。我测试正确。但是我无法找到导航中的外部链接为何停止工作的原因。抽屉打开，但是单击时没有任何反应。请帮忙。

package com.maitechbaba.vaastu.totke;
import android.content.Intent;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.widget.Toast;

import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.MobileAds;

/**
 * Class that initializes the Categories Activity for the app.
 */
public class CategoriesActivity extends AppCompatActivity {

    private DrawerLayout dl;
    private ActionBarDrawerToggle t;
    public NavigationView nv;
    //TextView secondp;
    //private InterstitialAd interstitial;

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

        MobileAds.initialize(this, "ca-app-pub-8135736126553624~2677944470");
        AdView mAdView = (AdView) findViewById(R.id.adView2);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);

        // Add Back (Up) Functionality
        Utils.activateBackBtn(CategoriesActivity.this, R.id.category_back_btn);

        // Initiate the ViewPager
        ViewPager viewPager = (ViewPager) findViewById(R.id.category_view_pager);
        CategoriesAdapter adapter = new CategoriesAdapter(getSupportFragmentManager(), CategoriesActivity.this);
        viewPager.setAdapter(adapter);

        // Set Tab Titles
        TabLayout tabLayout = (TabLayout) findViewById(R.id.category_tabs);
        tabLayout.setupWithViewPager(viewPager);

        // Select Tab from Intent
        TabLayout.Tab tab = tabLayout.getTabAt(getIntent().getIntExtra("selected_index", 0));
        if (tab != null) tab.select();


        ///
        dl = (DrawerLayout)findViewById(R.id.activity_categories);
        t = new ActionBarDrawerToggle(this, dl, R.string.Open, R.string.Close);
        dl.addDrawerListener(t);
        t.syncState();



        nv = (NavigationView)findViewById(R.id.nv);
        nv.setItemIconTintList(null);
        nv.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                int id = item.getItemId();
                switch(id)
                {
                    case R.id.account:
                        //Request new article
                        Intent intent = new Intent (Intent.ACTION_VIEW , Uri.parse("mailto:" + "aryan.yudi@gmail.com"));
                        intent.putExtra(Intent.EXTRA_SUBJECT, "Please Add New Content");
                        intent.putExtra(Intent.EXTRA_TEXT, "Hi , Please add following content in next update");
                        startActivity(intent);
                        finish();
                        return true;

                    case R.id.settings:
                        //Checkout our apps
                        startActivity(new Intent(CategoriesActivity.this, AppActivity.class));
                        return true;
                    //case R.id.mycart:
                    //   Toast.makeText(MainActivity.this, "My Cart",Toast.LENGTH_SHORT).show();
                    case R.id.visit:
                        Toast.makeText(CategoriesActivity.this, "Happy Visit",Toast.LENGTH_SHORT).show();
                        Uri uri = Uri.parse( "https://www.maitechbaba.com" );
                        startActivity( new Intent( Intent.ACTION_VIEW, uri ) );
                        return true;
                    case R.id.youtube:
                        Toast.makeText(CategoriesActivity.this, "Thanks ",Toast.LENGTH_SHORT).show();
                        Uri uri3 = Uri.parse( "https://www.youtube.com/techbabakivines?sub_confirmation=1" );
                        startActivity( new Intent( Intent.ACTION_VIEW, uri3 ) );
                        return true;
                    case R.id.facebook:
                        Toast.makeText(CategoriesActivity.this, "Thank You",Toast.LENGTH_SHORT).show();
                        Uri uri1 = Uri.parse( "https://www.facebook.com/TechBaba7/" );
                        startActivity( new Intent( Intent.ACTION_VIEW, uri1 ) );
                        return true;
                    case R.id.instagram:
                        Toast.makeText(CategoriesActivity.this, "Thanks",Toast.LENGTH_SHORT).show();
                        Uri uri2 = Uri.parse( "https://www.instagram.com/maitechbaba/" );
                        startActivity( new Intent( Intent.ACTION_VIEW, uri2 ) );
                        return true;

                    default:return true;
                }


            }
        });

    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        if(t.onOptionsItemSelected(item))
          return true;
        return super.onOptionsItemSelected(item);
    }
}

这是代码，现在我被困在这里。我检查了xml文件。这似乎也找到了，并且正如我告诉我的那样，当时它工作得很好。