java - 我想要修复错误 ERR_UNKNOWN_URL_SCHEME

Question

使用下面的简单代码，我可以正确加载我的 URL，但是，当我尝试点击以 mailto: whatsapp: 和 tg: (Telegram) 开头的 HTML 链接时，我得到“ERR_UNKNOWN_URL_SCHEME”。

任何人都可以帮我解决这个问题，好吗？不幸的是，我根本不懂 Java :(

谢谢。

公共类 MainActivity 扩展 AppCompatActivity {

String websiteURL = "https://legakyastore.com/"; // sets web url
private WebView webview;
SwipeRefreshLayout mySwipeRefreshLayout;
private ProgressBar progressBar;

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

    FirebaseMessaging.getInstance().subscribeToTopic("weather")
            .addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    String msg = "Done";
                    if (!task.isSuccessful()) {
                        msg = "Failed";
                    }
                }
            });

    if( ! CheckNetwork.isInternetAvailable(this)) //returns true if internet available
    {
        //if there is no internet do this
        setContentView(R.layout.activity_main);
        //Toast.makeText(this,"No Internet Connection, Chris",Toast.LENGTH_LONG).show();

        new AlertDialog.Builder(this) //alert the person knowing they are about to close
                .setTitle("Error")
                .setMessage("Please Check Your Internet Connection and Try Again.")
                .setPositiveButton("Okay", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                })
                //.setNegativeButton("No", null)
                .show();

    }
    else
    {
        //Webview stuff
        webview = findViewById(R.id.webView);
        webview.getSettings().setJavaScriptEnabled(true);
        webview.getSettings().setDomStorageEnabled(true);
        webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
        webview.loadUrl(websiteURL);
        webview.setWebViewClient(new WebViewClientDemo());
        webview.setWebChromeClient(new WebChromeClientDemo());

    }

    //Swipe to refresh functionality
    mySwipeRefreshLayout = (SwipeRefreshLayout)this.findViewById(R.id.swipeContainer);

    mySwipeRefreshLayout.setOnRefreshListener(
            new SwipeRefreshLayout.OnRefreshListener() {
                @Override
                public void onRefresh() {
                    webview.reload();
                }
            }
    );

    if(Build.VERSION.SDK_INT>= Build.VERSION_CODES.M){
        if(checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED){

            Log.d("permission","permission denied to WRITE_EXTERNAL_STORAGE - requesting it");
            String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
            requestPermissions(permissions,1);
        }


    }

//处理下载

    webview.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.setMimeType(mimeType);
            String cookies = CookieManager.getInstance().getCookie(url);
            request.addRequestHeader("cookie",cookies);
            request.addRequestHeader("User-Agent",userAgent);
            request.setDescription("Downloading file....");
            request.setTitle(URLUtil.guessFileName(url,contentDisposition,mimeType));
            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,URLUtil.guessFileName(url, contentDisposition, mimeType));
            DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
            dm.enqueue(request);
            Toast.makeText(getApplicationContext(),"Downloading File",Toast.LENGTH_SHORT).show();


        }
    });

    //Progress bar
    progressBar = (ProgressBar) findViewById(R.id.progressBar);
    progressBar.setMax(100);
}


private class WebViewClientDemo extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }
    @Override
    public void onPageFinished(WebView view, String url) {
        super.onPageFinished(view, url);
        progressBar.setVisibility(View.GONE);
        progressBar.setProgress(100);
        mySwipeRefreshLayout.setRefreshing(false);
    }
    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
        super.onPageStarted(view, url, favicon);
        progressBar.setVisibility(View.VISIBLE);
        progressBar.setProgress(0);
    }

}
private class WebChromeClientDemo extends WebChromeClient {
    public void onProgressChanged(WebView view, int progress) {
        progressBar.setProgress(progress);
    }
}
//set back button functionality
@Override
public void onBackPressed() { //if user presses the back button do this
    if (webview.isFocused() && webview.canGoBack()) { //check if in webview and the user can go back
        webview.goBack(); //go back in webview
    } else { //do this if the webview cannot go back any further

        new AlertDialog.Builder(this) //alert the person knowing they are about to close
                .setTitle("Confirm Exit")
                .setMessage("Are you sure you want to close Legakyastore?")
                .setPositiveButton("Exit", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                })
                .setNegativeButton("Stay", null)
                .show();
    }
}

}

类检查网络 {

private static final String TAG = CheckNetwork.class.getSimpleName();

public static boolean isInternetAvailable(Context context)
{
    NetworkInfo info = (NetworkInfo) ((ConnectivityManager)
            context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();

    if (info == null)
    {
        Log.d(TAG,"no internet connection");
        return false;
    }
    else
    {
        if(info.isConnected())
        {
            Log.d(TAG," internet connection available...");
            return true;
        }
        else
        {
            Log.d(TAG," internet connection");
            return true;
        }

    }
}

}

标签： javahtml