I want to show a Custom Listview inside a popup window using service class. This list is fetching data from database and working fine in an activity but not in popup window. Below is my code. Any help will be appreciated.
This is my Service class:
public class PopupService extends Service{
final static String URL = "https://billspill.com/json.php";
private WindowManager mWindowManager;
private View popupview;
public PopupService() {
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
popupview = LayoutInflater.from(this).inflate(R.layout.popup, null);
//Add the view to the window.
final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_PHONE,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSLUCENT);
params.gravity = Gravity.TOP | Gravity.START;
params.x = 0;
params.y = 100;
mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
mWindowManager.addView(popupview, params);
Button close = (Button)popupview.findViewById(R.id.dismiss);
close.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
stopSelf();
}
});
ListView lv = (ListView)popupview.findViewById(R.id.pager);
new Downloader(this,lv,URL).execute();
}
@Override
public void onDestroy() {
super.onDestroy();
if (popupview != null) mWindowManager.removeView(popupview);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_NOT_STICKY;
}
Below is my Downloader class which extends AsyncTask. This Downloader class calls DataParser method from DataParser class which further calls Adapter class to inflate data into the list. These three classes are working fine in an activity, but when I call Downloader in my service, the app crashes. I think there is a problem in passing the Context in Downloader from the service class.
public class Downloader extends AsyncTask<Void,Void,String> {
Context ctx;
ListView lv;
ProgressDialog pd;
@Override
protected void onPreExecute() {
super.onPreExecute();
pd=new ProgressDialog(ctx);
pd.setTitle("Retrive");
pd.setMessage("Retrieving....please wait");
pd.show();
}
@Override
protected void onPostExecute(String jsonData) {
super.onPostExecute(jsonData);
pd.dismiss();
if(jsonData==null)
{
Toast.makeText(ctx,"Unsuccessfull,No data Retrieved",Toast.LENGTH_SHORT).show();
}
else {
DataParser parser = new DataParser(ctx,jsonData,lv);
parser.execute();
}
}
private String downloadData(){
HttpURLConnection con = Connector.connect(urlAddress);
if(con==null) {
Toast.makeText(ctx,"Connection is null",Toast.LENGTH_LONG).show();
}
try{
InputStream is = new BufferedInputStream(con.getInputStream());
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer jsonData= new StringBuffer();
while ((line=br.readLine())!=null)
{
jsonData.append(line+"/n");
}
br.close();
is.close();
return jsonData.toString();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
public Downloader(Context ctx, ListView lv, String urlAddress) {
this.ctx = ctx;
this.lv = lv;
this.urlAddress = urlAddress;
}
String urlAddress;
@Override
protected String doInBackground(Void... params) {
return downloadData();
}
Beginning of crash:
--------- beginning of crash
05-14 18:58:00.694 10664-10664/com.billspillsmoothshopping.android E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.billspillsmoothshopping.android, PID: 10664
java.lang.RuntimeException: Unable to create service com.billspillsmoothshopping.android.PopupService: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2771)
at android.app.ActivityThread.access$1800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1386)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:697)
Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
at android.view.ViewRootImpl.setView(ViewRootImpl.java:584)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:282)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
at android.app.Dialog.show(Dialog.java:298)
at com.billspillsmoothshopping.android.m_MySQL.CompareDownloader.onPreExecute(CompareDownloader.java:32)
at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:591)
at android.os.AsyncTask.execute(AsyncTask.java:539)
at com.billspillsmoothshopping.android.PopupService.onCreate(PopupService.java:81)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2761)
at android.app.ActivityThread.access$1800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1386)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
