问题:

I am a beginner in making android applications. I have made a web view which shows my web page. My web page consists contact buttons that i want to be opened in external apps like mail and dial. Therefore i got some help and got a code like this

import android.app.Activity; import android.content.Intent; import android.net.MailTo; import android.net.Uri; import android.os.Bundle; import android.webkit.WebView; import android.webkit.WebViewClient;  public class ourViewClient extends WebViewClient {  @Override public boolean shouldOverrideUrlLoading(WebView view, String url) {     try{         System.out.println("url called:::" + url);         if (url.startsWith("tel:")) {             Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));             startActivity(intent);         }  else if (url.startsWith("http:")                 || url.startsWith("https:")) {              Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));             startActivity(intent);          }  else if (url.startsWith("mailto:")) {              MailTo mt=MailTo.parse(url);              send_email(mt.getTo());          }         else {             return false;         }     }catch(Exception e){         e.printStackTrace();     }      return true; }    public void send_email(String email_add) {     System.out.println("Email address::::" + email_add);      final Intent emailIntent = new Intent(             android.content.Intent.ACTION_SEND);     emailIntent.setType("plain/text");     emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,             new String[] { email_add });     emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "");     emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "");     startActivity(             Intent.createChooser(emailIntent, "Send mail..."));  }  }

But then i got this error "Cannot find symbol method startActivity(android.content.Intent)" What is wrong with the startactivity?

回答1:

WebViewClient doesn't have context so you cannot directly start an activity

Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); view.getContext().startActivity(intent);

Alternatively, pass context to webViewClient using its constructor

public class ourViewClient extends WebViewClient {  Context context;   public ourViewClient (Context c){     this.context = c; }   @Override public boolean shouldOverrideUrlLoading(WebView view, String url) {     try{         System.out.println("url called:::" + url);         if (url.startsWith("tel:")) {             Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));             context.startActivity(intent);         }  else if (url.startsWith("http:")                 || url.startsWith("https:")) {              Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));             context.startActivity(intent);          }  else if (url.startsWith("mailto:")) {              MailTo mt=MailTo.parse(url);              send_email(mt.getTo());          }         else {             return false;         }     }catch(Exception e){         e.printStackTrace();     }       return true; }

转载请标明出处:Cannot find symbol method startActivity(android.content.Intent)

文章来源: Cannot find symbol method startActivity(android.content.Intent)

标签

url

intent

context