[FIXED] 'onCreate(Bundle)' is already defined in activity

Issue

Being my first project ever and wanting to implement banner ads in my app, I don't know how to get rid of this problem: 'onCreate(Bundle)' is already defined in activity in MainActity.java . Here's the problematic part:

public class MainActivity extends AppCompatActivity {

    private AdView mAdView;

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

        MobileAds.initialize(this, new OnInitializationCompleteListener() {
            @Override
            public void onInitializationComplete(InitializationStatus initializationStatus) {
            }
        });

        mAdView = findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);



    }

    private WebView webView;

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

        CustomWebViewClient client = new CustomWebViewClient(this);
        webView = findViewById(R.id.webView);
        webView.setWebViewClient(client);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.clearCache(true);
        webView.loadUrl("https://example.com/");
    }

Solution

You are declaring the same method twice. Just add the content of the second method in the first method and delete the second. Like so:

public class MainActivity extends AppCompatActivity {

    private AdView mAdView;
    private WebView webView;

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

        MobileAds.initialize(this, new OnInitializationCompleteListener() {
            @Override
            public void onInitializationComplete(InitializationStatus initializationStatus) {
            }
        });

        mAdView = findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);
        CustomWebViewClient client = new CustomWebViewClient(this);
        webView = findViewById(R.id.webView);
        webView.setWebViewClient(client);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.clearCache(true);
        webView.loadUrl("https://example.com/");

    }
}

Answered By - Mike087
Answer Checked By - Marie Seifert (JavaFixing Admin)