title: Java.lang.IllegalStateException: Already attached
body: <p>I'm trying to build an app, that pastes an input from a previous activity(works with no problem) and then shows me some things from a database(when ButtonGet is pressed). The problem is that when I try to Run the project, I get 
  <code>Java.lang.IllegalStateException: Already attached</code>. What is wrong with my code?</p>
  
  <pre><code> package br.exemplozxingintegration;
  
   import android.annotation.SuppressLint;
   import android.app.ProgressDialog;
   import android.content.ClipData;
   import android.content.ClipboardManager;
   import android.os.Bundle;
   import android.support.v7.app.AppCompatActivity;
   import android.view.View;
   import android.widget.Button;
   import android.widget.EditText;
   import android.widget.TextView;
   import android.widget.Toast;
  
   import com.android.volley.RequestQueue;
   import com.android.volley.Response;
   import com.android.volley.VolleyError;
   import com.android.volley.toolbox.StringRequest;
   import com.android.volley.toolbox.Volley;
  
   import org.json.JSONArray;
   import org.json.JSONException;
   import org.json.JSONObject;
  
  
  
   public class SecondActivity extends AppCompatActivity implements View.OnClickListener  {
  
  
  
       private EditText  pastetext;
       private ClipboardManager myClipboard;
       private ClipData myClip;
       private Button btn;
       private EditText textView1;
       private Button buttonGet;
       private TextView textViewResult;
  
       private ProgressDialog loading;
  
  
             @Override
             protected void onCreate(Bundle savedInstanceState) {
                 super.onCreate(savedInstanceState);
                 setContentView(R.layout.activity_second);
                 myClipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
                 pastetext = (EditText) findViewById(R.id.textView1);
                 btn = (Button)findViewById(R.id.buttonPaste);
                 btn.performClick();
                 super.onCreate(savedInstanceState);
                 setContentView(R.layout.activity_main);
  
                 textView1 = (EditText) findViewById(R.id.textView1);
                 buttonGet = (Button) findViewById(R.id.buttonGet);
                 textViewResult = (TextView) findViewById(R.id.textViewResult);
  
                 buttonGet.setOnClickListener(this);
  
             }
  
  
  
             @SuppressLint("NewApi")
             public void paste(View view) {
                 ClipData cp = myClipboard.getPrimaryClip();
                 ClipData.Item item = cp.getItemAt(0);
                 String text = item.getText().toString();
                 pastetext.setText(text);
                 Toast.makeText(getApplicationContext(), "Text Pasted",
                         Toast.LENGTH_SHORT).show();
  
  
             }
  
  
       private void getData() {
           String id = textView1.getText().toString().trim();
           if (id.equals("")) {
               Toast.makeText(this, "", Toast.LENGTH_LONG).show();
               return;
           }
           loading = ProgressDialog.show(this,"Please wait...","Fetching...",false,false);
  
           String url = Config.DATA_URL+textView1.getText().toString().trim();
  
           StringRequest stringRequest = new StringRequest(url, new Response.Listener&lt;String&gt;() {
               @Override
               public void onResponse(String response) {
                   loading.dismiss();
                   showJSON(response);
               }
           },
                   new Response.ErrorListener() {
                       @Override
                       public void onErrorResponse(VolleyError error) {
                           Toast.makeText(SecondActivity.this,error.getMessage().toString(),Toast.LENGTH_LONG).show();
                       }
                   });
  
           RequestQueue requestQueue = Volley.newRequestQueue(this);
           requestQueue.add(stringRequest);
       }
  
       private void showJSON(String response){
           String name="";
           String image = "";
           try {
               JSONObject jsonObject = new JSONObject(response);
               JSONArray result = jsonObject.getJSONArray(Config.JSON_ARRAY);
               JSONObject collegeData = result.getJSONObject(0);
               name = collegeData.getString(Config.KEY_NAME);
               image = collegeData.getString(Config.KEY_IMAGE);
           } catch (JSONException e) {
               e.printStackTrace();
           }
           textViewResult.setText("Name:\t"+name+"\nImagine :\t"+ image);
       }
  
       @Override
       public void onClick(View v) {
           getData();
       }
   }
  </code></pre>