WebView加载https的空白及图片加载不了的问题

Posted 2022-12-05 大白龙

目前ios现在都需要换成https请求，现在遇到一个webview加载https的有一些问题及解决办法。

1、webview加载https空白页面

解决办法：

@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) 
    handler.proceed(); // Ignore SSL certificate errors

或者可以这么写：

 @Override
    public void onReceivedSslError(WebView view, final SslErrorHandler handler, SslError error) 
    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
    String message = "SSL Certificate error.";
        switch (error.getPrimaryError()) 
            case SslError.SSL_UNTRUSTED:
                message = "The certificate authority is not trusted.";
                break;
            case SslError.SSL_EXPIRED:
                message = "The certificate has expired.";
                break;
            case SslError.SSL_IDMISMATCH:
                message = "The certificate Hostname mismatch.";
                break;
            case SslError.SSL_NOTYETVALID:
                message = "The certificate is not yet valid.";
                break;
        
        message += " Do you want to continue anyway?";

        builder.setTitle("SSL Certificate Error");
        builder.setMessage(message);
    builder.setPositiveButton("continue", new DialogInterface.OnClickListener() 
        @Override
        public void onClick(DialogInterface dialog, int which) 
            handler.proceed();
        
    );
    builder.setNegativeButton("cancel", new DialogInterface.OnClickListener() 
        @Override
        public void onClick(DialogInterface dialog, int which) 
            handler.cancel();
        
    );
    final AlertDialog dialog = builder.create();
    dialog.show();

可能遇到的问题：有可能会遇到有的图片加载不出来，那是因为webview 从Lollipop(5.0)开始webview默认不允许混合模式，https当中不能加载http资源，需要设置开启。

解决办法：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) 
    settings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);