사이드메뉴에 사이트 링크를 걸고 싶은데 @Override 부분에 오류가 나옵니다.

Question

package com.example.pchand01;

import android.content.Intent;
import android.net.Uri;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
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.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends AppCompatActivity {


    private DrawerLayout mDrawerlayout;
    private ActionBarDrawerToggle mToggle;



    private WebView wv; 


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


                wv = (WebView) findViewById(R.id.wv);
        wv.getSettings().setJavaScriptEnabled(true);
        wv.getSettings().setBuiltInZoomControls(true);
       
        mDrawerlayout = (DrawerLayout) findViewById(R.id.drawer);
        mToggle = new ActionBarDrawerToggle(this, mDrawerlayout, R.string.open, R.string.close);
        mDrawerlayout.addDrawerListener(mToggle);
        mToggle.syncState();
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);



       
        NavigationView navigationView = (NavigationView) findViewById(R.id.drawer);
        wv = (WebView) findViewById(R.id.wv);
        WebSettings webSettings = wv.getSettings();
        webSettings.setJavaScriptEnabled(true);
        wv.loadUrl("http://www.pchand.or.kr/mobile/");
        wv.setWebViewClient(new WebViewClient());
       
        webSettings.setLoadWithOverviewMode(true);
        webSettings.setUseWideViewPort(true);
           }


    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.telphone) {
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("tel:010-1111-1111"));
            startActivity(intent);
            return true; }

        if (id == R.id.home) {
            Intent intent = new Intent(getApplicationContext(), MainActivity.class);
            startActivity(intent);
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")


    @Override    //이 부분에서 오류가 나옵니다. 해결 방법 있을까요?
    public boolean onNavigationItemSelected(MenuItem item) {



        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.homepage) {
            wv.loadUrl(https://naver.com);
        
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

    public  boolean onKeyDown(int keyCode, KeyEvent event){
        if ((keyCode==KeyEvent.KEYCODE_BACK)&& wv.canGoBack()){
            wv.canGoBack();
            return  true;

        }


        return super.onKeyDown(keyCode,event);

    }


}

Answer 1

NavigationView.OnNavigationItemSelectedListener 인터페이스를 구현해 주셔야 합니다.

 

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener