'onCreate(Bundle)' 已在活動中定義

Question

作為我的第一個項目並想在我的應用程序中實現橫幅廣告，我不知道如何解決這個問題： 'onCreate(Bundle)' is already defined in activity 。 這是有問題的部分：

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/");
    }

Answer 1

您兩次聲明相同的方法。 只需在第一種方法中添加第二種方法的內容，刪除第二種即可。 像這樣：

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/");

    }
}