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Android Build a Blog Reader Android App Using Intents to Display and Share Posts Opening a Webpage Within the App

Ben Junya
Ben Junya
12,365 Points
Posted by Ben Junya
Ben Junya
12,365 Points

Code Challenge: Using intents to Display and Share... Task 3 help

I'm having a problem converting the Uri to a string. Here's my code:

import android.os.Bundle; import android.content.Intent; import android.net.Uri; import android.webkit.WebView;

public class WebViewActivity extends Activity {

protected String mUrl;

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



  WebView webView = (WebView) findViewById(R.id.webView1);
  Intent intent = getIntent();
  Uri mUrl = intent.getData();
  mUrl.toString();
}

}

I know in the video we were told to convert it to a string wiehn we loaded the Url into the webview with

webView.loadUrl(blogUri.toString());

But the challenge says that I need to store mUrl as a string, and I thought the .toString() method would have taken care of that, but I keep encountering this problem. What's going on?

3 Answers

Rohit Sriram
Rohit Sriram
4,235 Points

mUrl = mUrl.toString(); probably doesn't work because of the fact that you said it was a Uri.

Hope this helps

Ben Junya
Ben Junya
12,365 Points
Ben Junya
Ben Junya
12,365 Points

Hey Rohit, thanks for your help. You enlightened me a little bit by showing me what went wrong. Plus, a full night of rest helped clear my head :)

I was setting declaring a mUrl as a String AND a Uri. That's where it went wrong. I needed to declare a new Uri and convert it to a String with toString();

Here's what I fixed:

protected String mUrl;

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

WebView webView = (WebView) findViewById(R.id.webView1); Intent intent = getIntent(); Uri data = intent.getData(); mUrl = data.toString();

}

That solved it. Thanks Rohit!

Rohit Sriram
Rohit Sriram
4,235 Points
Rohit Sriram
Rohit Sriram
4,235 Points

First of all I noticed something weird. If mUrl is a string then how did you say it was a Uri later "Uri mUrl = intent.getData();". This may be the cause of you r problems as they are two different types, and you cannot convert them. To make mUrl a string(ignoring the earlier quirk, you should probably use a different member variable.) just use String<variable name> = <whatever you want to convert>.toString();

*Stuff in angle brackets can be substituted to be whatever you want

Rohit Sriram
Rohit Sriram
4,235 Points
Rohit Sriram
Rohit Sriram
4,235 Points

I think when it says that you have to store it as a string, you need to add mUrl.toString() to a string variable. Otherwise, the fact that you converted it doesn't make much difference, as there is no record left that it was converted into a string. In other words, it would have no effect on your app. At least, this is what I understand. Try adding it to a string variable and see if it works. i think that is how I did it.

Ben Junya
Ben Junya
12,365 Points
Ben Junya
Ben Junya
12,365 Points

Hey Rohit, how would I add it to a string variable? It's still not working when I try to declare a new string. There's already a member class variable declared (protected String mUrl) in the top.

I tried:

mUrl = mUrl.toString();

and it gives me a compiler error. This is really frustrating. What's going on?