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
答案 0 :(得分:0)
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.
}