CODEWITHSUNDEEP
androidjsonclassasynchronous
Arndroid
Arndroid

Reputation: 314

putting jsonAsync code into seperate class... Android

I tried to make my code to be like this: https://github.com/jbeerdev/BrightHubCode/blob/master/src/com/bright/hub/background/WebServiceBackgroundActivity.java This is how I call and send with the Async class, that seems to be fine. If I put all the code in my MainActivity it just works, but I can't seem to get this code via a external class to work.

My MainActivity code: (parts which matter)

public class MainActivity extends FragmentActivity implements ActionBar.OnNavigationListener {

private static final String url = "http://www.somesite.com/JSON.php";
public String post;
public ListView listView;
public String jsonResult;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initializeDialog();
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView1);
accessWebService();
}
private void accessWebService() {
    JsonReadTask jsonTask = new JsonReadTask();
    jsonTask.execute(new String[] { url, post },this);
}

private void initializeDialog() {
    dialog = ProgressDialog.show(MainActivity.this, "", "LoadingData. Wait...", true);
    dialog.show();
    }   

    public void ListDrawer() {
    List<Map<String, String>> galleryList = new ArrayList<Map<String, String>>();

    try {

   JSONObject jsonResponse = new JSONObject(jsonResult);
   JSONArray jsonMainNode = jsonResponse.optJSONArray("galleries");

   for (int i = 0; i < jsonMainNode.length(); i++) {
    JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);

    String loc = jsonChildNode.optString("loc");
    String foto = jsonChildNode.optString("foto");
    String outPut = "http://www.somesite.com/images/" + loc + foto;
    galleryList.add(createGallery("galleries", outPut));
   }
  } catch (JSONException e) {
  //Toast.makeText(getApplicationContext(), "Error" + e.toString(),
     //Toast.LENGTH_LONG).show();
  }

}

But on the Async class: https://github.com/jbeerdev/BrightHubCode/blob/master/src/com/bright/hub/background/WebServiceAsyncTask.java ^I get these kinds of errors: "java.lang.String[] cannot be cast to java.lang.String" So where this happens: "String serviceUrl = (String) params[0];" is where I have problems..? It's in the "doInBackground" at least: "An error occured while executing doInBackground()"

My Async class code: (parts which matter)

    public class JsonReadTask extends AsyncTask<Object, Void, String> {
    MainActivity callerActivity;
    @Override
    public String doInBackground(Object... params) {

    callerActivity = (MainActivity) params[1];
    HttpClient httpclient = new DefaultHttpClient();
    String theurl = (String) params[0]; //urlJSON

    HttpPost httppost = new HttpPost(theurl);
    try {
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
    String thepost = (String) params[1]; //tablename
    nameValuePairs.add(new BasicNameValuePair("getgallery", "thepost"));
    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
    HttpResponse response = httpclient.execute(httppost);


        callerActivity.jsonResult = inputStreamToString(response.getEntity().getContent()).toString();
    }

    catch (ClientProtocolException e) {
    e.printStackTrace();
    } catch (IOException e) {
    e.printStackTrace();
    }
    return null;
    }

The apps crashes on boot giving a Dialog it crashed. Thanks in advance for the help!

Edit My logcat: http://pastebin.com/XZaNZTTg

Upvotes: 0

Views: 176

Answers (1)

Joe Minichino
Joe Minichino

Reputation: 2773

You have two significant lines in the crash log:

10-13 11:49:43.881: E/AndroidRuntime(7289): Caused by: java.lang.ClassCastException: java.lang.String[] cannot be cast to java.lang.String
10-13 11:49:43.881: E/AndroidRuntime(7289):     at com.example.providenceartapp.JsonReadTask.doInBackground(JsonReadTask.java:31)

Somewhere you're trying to use a string array as a single string, it would look as if it's here

String theurl = (String) params[0]; //urlJSON;

params[0] is an array.

Upvotes: 1

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