I am trying to load the data from mysql database into a listview in android.The progress dialog appears then the app crashes.The error what i get is activity has leaked window.Please tell me What is the problem which is causing this error.This is the java activity file
public class CompScience extends ListActivity {
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> booksList;
// url to get all products list
private static String url= "http://10.0.2.2/books/get_all_books.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_BOOKS = "computerscience";
private static final String TAG_TITLE = "title";
private static final String TAG_BID = "bid";
private static final String TAG_AUTHOR = "author";
// products JSONArray
JSONArray books = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_comp_science);
// Hashmap for ListView
booksList = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllProducts().execute();
// Get listview
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//String description = ((TextView) view).getText().toString();
Intent i = new Intent(CompScience.this,List1.class);
// i.putExtra("description", description);
startActivity(i);
}
});
}
class LoadAllProducts extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(CompScience.this);
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Books: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
books = json.getJSONArray(TAG_BOOKS);
// looping through All Products
for (int i = 0; i < books.length(); i++) {
JSONObject c = books.getJSONObject(i);
// Storing each json item in variable
String bid = c.getString(TAG_BID);
String title = c.getString(TAG_TITLE);
String author = c.getString(TAG_AUTHOR);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_BID, bid);
map.put(TAG_TITLE, title);
map.put(TAG_AUTHOR, author);
// adding HashList to ArrayList
booksList.add(map);
}
} else {
Log.e(TAG_BOOKS, "No books found");
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
CompScience.this,booksList,
R.layout.list_item, new String[] { TAG_BID,
TAG_TITLE,TAG_AUTHOR},
new int[] { R.id.bid, R.id.title,R.id.author });
// updating listview
setListAdapter(adapter);
}
});
}
Here is my logcat file
04-07 06:13:09.924: E/WindowManager(1617): Activity com.example.dashboard.CompScience has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41750a58 V.E..... R.....ID 0,0-228,72} that was originally added here
04-07 06:13:09.924: E/WindowManager(1617): android.view.WindowLeaked: Activity com.example.dashboard.CompScience has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41750a58 V.E..... R.....ID 0,0-228,72} that was originally added here
04-07 06:13:09.924: E/WindowManager(1617): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:345)
04-07 06:13:09.924: E/WindowManager(1617): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:239)
04-07 06:13:09.924: E/WindowManager(1617): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
04-07 06:13:09.924: E/WindowManager(1617): at android.app.Dialog.show(Dialog.java:281)
04-07 06:13:09.924: E/WindowManager(1617): at com.example.dashboard.CompScience$LoadAllProducts.onPreExecute(CompScience.java:85)
04-07 06:13:09.924: E/WindowManager(1617): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
04-07 06:13:09.924: E/WindowManager(1617): at android.os.AsyncTask.execute(AsyncTask.java:534)
04-07 06:13:09.924: E/WindowManager(1617): at com.example.dashboard.CompScience.onCreate(CompScience.java:59)
04-07 06:13:09.924: E/WindowManager(1617): at android.app.Activity.performCreate(Activity.java:5133)
04-07 06:13:09.924: E/WindowManager(1617): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
04-07 06:13:09.924: E/WindowManager(1617): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
04-07 06:13:09.924: E/WindowManager(1617): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
04-07 06:13:09.924: E/WindowManager(1617): at android.app.ActivityThread.access$600(ActivityThread.java:141)
04-07 06:13:09.924: E/WindowManager(1617): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
04-07 06:13:09.924: E/WindowManager(1617): at android.os.Handler.dispatchMessage(Handler.java:99)
04-07 06:13:09.924: E/WindowManager(1617): at android.os.Looper.loop(Looper.java:137)
04-07 06:13:09.924: E/WindowManager(1617): at android.app.ActivityThread.main(ActivityThread.java:5103)
04-07 06:13:09.924: E/WindowManager(1617): at java.lang.reflect.Method.invokeNative(Native Method)
04-07 06:13:09.924: E/WindowManager(1617): at java.lang.reflect.Method.invoke(Method.java:525)
04-07 06:13:09.924: E/WindowManager(1617): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
04-07 06:13:09.924: E/WindowManager(1617): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
04-07 06:13:09.924: E/WindowManager(1617): at dalvik.system.NativeStart.main(Native Method)
Please help
