Question

我想在一个简单的Webview（android studio）中组合两件事：

1个文件上传：这花了我几天的时间才找到版本4 ..我已经在那里，文件上传工作了！

2 - 这是问题 - 我想添加连接检查，这样当没有互联网连接时，会出现一条消息而不是加载默认错误页面。我已经尝试在这个线程中实现解决方案： android - how to prevent webview to load when no internet connection 并使用了https://github.com/iofirag/couponsAndroidApp/tree/master/app/src/main/java/com/oa/couponswebapp 例如......

我到目前为止的代码:(对于我网页上的文件上传）

package lafs.test;


import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {

    WebView web;

    private ValueCallback<Uri> mUploadMessage;
    private final static int FILECHOOSER_RESULTCODE=1;

    @Override
    protected void onActivityResult(int requestCode, int resultCode,
                                    Intent intent) {
        if(requestCode==FILECHOOSER_RESULTCODE)
        {
            if (null == mUploadMessage) return;
            Uri result = intent == null || resultCode != RESULT_OK ? null
                    : intent.getData();
            mUploadMessage.onReceiveValue(result);
            mUploadMessage = null;
        }
    }

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

        web = (WebView) findViewById(R.id.webview);


        web = new WebView(this);
        web.getSettings().setJavaScriptEnabled(true);
        web.loadUrl("http://www.mywebsiteurl.com");
        web.setWebViewClient(new myWebClient());
        web.setWebChromeClient(new WebChromeClient()
        {




            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
                mUploadMessage = uploadMsg;
                Intent i = new Intent(Intent.ACTION_GET_CONTENT);
                i.addCategory(Intent.CATEGORY_OPENABLE);
                i.setType("image/*");
                MainActivity.this.startActivityForResult( Intent.createChooser( i, "File Chooser" ),
                        MainActivity.FILECHOOSER_RESULTCODE );

            }

        });


        setContentView(web);


    }

    public class myWebClient extends WebViewClient
    {
        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            // TODO Auto-generated method stub
            super.onPageStarted(view, url, favicon);
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            // TODO Auto-generated method stub

            view.loadUrl(url);
            return true;

        }

        @Override
        public void onPageFinished(WebView view, String url) {
            // TODO Auto-generated method stub
            super.onPageFinished(view, url);


        }
    }

    //flipscreen not loading again
    @Override
    public void onConfigurationChanged(Configuration newConfig){
        super.onConfigurationChanged(newConfig);
    }



}

任何人都可以帮我这个吗？感谢

Answer 1

将示例中的类添加到项目中，将此类导入Activity的顶部。而不是使用你添加的类包含的静态函数， in onCreate（）。

像：

Boolean connection = DetectConnection.checkInternetConnection(this);
if (connection){
    //init webView and redirect user to your upload page by the internet.
}

在webview android studio中结合文件上传和连接检查

1 个答案: