title: Cannot resolve method 'startActivity(android.content.Intent)'
body: <p>As i titled it, i got an error where startActivity is not recognized. Here is the code : </p>
  
  <pre><code>AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
  builder.setTitle("Deal");
  builder.setMessage("Hello");
  builder.setPositiveButton("Call ME", new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which) {
  
          Intent callIntent = new Intent(Intent.ACTION_CALL);
          callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          callIntent.setData(Uri.parse("tel:" + "528543871"));
          startActivity(callIntent);
  
      }
  });
  builder.create();
  builder.show();
  </code></pre>