I got the problem, that I need to close my MainActivity.java, but it wont work. Everytime I try to build the app it say's, that I didnt closed it right and Android Studio wants me to use ) instead of }. I would be happy if u could help me out. Thanks in advanced. Here is the code:

package com.privat.kircheimnetzedit;

import static android.view.KeyEvent.KEYCODE_BACK;

import androidx.appcompat.app.AppCompatActivity;

import android.app.DownloadManager;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.KeyEvent;
import android.webkit.DownloadListener;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

import java.util.concurrent.atomic.AtomicBoolean;

public class MainActivity<notificationId> extends AppCompatActivity {

    private static final int TIME_LIMIT = 1500;
    private static long backPressed;
    private WebView getHomepage;

    WebView homepage;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        homepage = findViewById(R.id.homepage);
        homepage.getSettings().setJavaScriptEnabled(true);
        homepage.setWebViewClient(new WebViewClient());
        homepage.setDownloadListener(new DownloadListener() {


            @Override
            public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
                DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
                request.allowScanningByMediaScanner();
                request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Downloaddatei aus Kirche im Netz App");
                DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
                dm.enqueue(request);

                AtomicBoolean onKeyDown = new AtomicBoolean(false);
                int keyCode, KeyEvent;
                android.view.KeyEvent event;
                if (event.getAction() == android.view.KeyEvent.ACTION_DOWN)

                    switch (keyCode) {
                    }
                case KEYCODE_BACK:
                if (homepage.canGoBack()) {

                    homepage.goBack();
                } else {

                    finish();
                }
                return;
                return;


                onKeyDown(keyCode);
            }
        }
    }
}

CodePudding user response：

Your switch case should have the "case" inside the "{" It should look like this:

    switch (keyCode){
        case 1:
            //your code here
            break;
        case 2:
            //your other code here
            break;
    }

Look here for reference: https://www.w3schools.com/java/java_switch.asp

CodePudding user response：

Try replacing

homepage.setDownloadListener(new DownloadListener() {


        @Override
        public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
            DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Downloaddatei aus Kirche im Netz App");
            DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
            dm.enqueue(request);

            AtomicBoolean onKeyDown = new AtomicBoolean(false);
            int keyCode, KeyEvent;
            android.view.KeyEvent event;
            if (event.getAction() == android.view.KeyEvent.ACTION_DOWN)

                switch (keyCode) {
                }
            case KEYCODE_BACK:
            if (homepage.canGoBack()) {

                homepage.goBack();
            } else {

                finish();
            }
            return;
            return;


            onKeyDown(keyCode);
        }
    }

with

homePage.setDownloadListener(new DownloadListener() {
    
    @Override
    public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
        DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
        request.allowScanningByMediaScanner();
        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Downloaddatei aus Kirche im Netz App");
        DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
        dm.enqueue(request);

        AtomicBoolean onKeyDown = new AtomicBoolean(false);
        int keyCode, KeyEvent;
        android.view.KeyEvent event;
        if (event.getAction() == android.view.KeyEvent.ACTION_DOWN) {

            switch (keyCode) {
                case KEYCODE_BACK:
                    if (homepage.canGoBack()) {

                        homepage.goBack();
                        break;
                    } else {
                        finish();
                        break;
                    }
                    return;
            }
            return;
        }


        onKeyDown(keyCode);
    }
}

Now this code will work completely fine!