[Solved] Asking the user for a URL to receive a JSON

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Create a constructor in your async Task

private class JSONTask extends AsyncTask<String, String, String> {
String url;
public JSONTask(String url){
this.url=url;
}

use the url string in place of params[0]

And wherever you call your async task do it like this

new JSONTask(textView.getText()).execute()

This should solve it.

Else you can directly use the do in background variable params.

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solved Asking the user for a URL to receive a JSON