Reputation: 4617
How to aggregate progressdialog?
My application requires lots of comunication with server. Some of the calls takes long time so i need to show progressdialogs. Befor, I put:
ProgressDialog pd;
@Override
protected void onPreExecute() {
pd = new ProgressDialog(app);
pd.setOwnerActivity(app);
pd.setTitle("Идет загрузка...");
pd.setCancelable(true);
pd.show();
}
protected void onPostExecute(JSONObject result) {
super.onPostExecute(result);
pd.dismiss();
//some code
}
to each class that extended asynctask. However, now i have to use .get() on asynctask class, so progressdialog flashes only when task is executed.
After that, I tried to remove progressdialog callses from asynctask classes and put it to JsonParser:
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static JSONArray jObj1 = null;
static String json = "";
DefaultHttpClient httpClient = null;
static Context context;
ProgressDialog pd;
// constructor
public JSONParser() {
}
private static Boolean isOnline() {
context = UILApplication.getAppContext();
Log.d("CONTEXT",context.toString());
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
Log.d("Conected", "Conected");
return true;
}
}
}
}
Log.d("disconected", "disconected");
return false;
}
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
if (isOnline()) {
pd = new ProgressDialog(context);
//pd.setOwnerActivity(context);
pd.setTitle("Идет загрузка...");
pd.setCancelable(true);
pd.show();
try {
String u = url;
u = u + "?";
httpClient = HttpClientFactory.getThreadSafeClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
for (int i = 0; i < params.size(); i++) {
u = u + params.get(i).getName() + "="
+ params.get(i).getValue() + "&";
}
Log.d("your url is", u);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
Log.d("data is sent", "true");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
} catch (ClientProtocolException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
Log.d("wait", "true");
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(is, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
if (json.contains("error:2")) {
return null;
}
Log.d("JSON", json);
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
return null;
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
return null;
}
pd.dismiss();
return jObj;
}
pd.dismiss();
error();
return null;
}
}
Unfortunatly it gaves me error. As i understand i should call dialog in UIthread.
06-20 13:46:01.368: W/System.err(1244): java.util.concurrent.ExecutionException: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 06-20 13:46:01.368: W/System.err(1244): at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:223) 06-20 13:46:01.377: W/System.err(1244): at java.util.concurrent.FutureTask.get(FutureTask.java:82) 06-20 13:46:01.377: W/System.err(1244): at android.os.AsyncTask.get(AsyncTask.java:482) 06-20 13:46:01.377: W/System.err(1244): at ua.mirkvartir.android.frontend.LoginActivity$2.onClick(LoginActivity.java:108) 06-20 13:46:01.377: W/System.err(1244): at android.view.View.performClick(View.java:4084) 06-20 13:46:01.377: W/System.err(1244): at android.view.View$PerformClick.run(View.java:16966) 06-20 13:46:01.387: W/System.err(1244): at android.os.Handler.handleCallback(Handler.java:615) 06-20 13:46:01.387: W/System.err(1244): at android.os.Handler.dispatchMessage(Handler.java:92) 06-20 13:46:01.387: W/System.err(1244): at android.os.Looper.loop(Looper.java:137) 06-20 13:46:01.387: W/System.err(1244): at android.app.ActivityThread.main(ActivityThread.java:4745) 06-20 13:46:01.397: W/System.err(1244): at java.lang.reflect.Method.invokeNative(Native Method) 06-20 13:46:01.397: W/System.err(1244): at java.lang.reflect.Method.invoke(Method.java:511) 06-20 13:46:01.397: W/System.err(1244): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 06-20 13:46:01.397: W/System.err(1244): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 06-20 13:46:01.407: W/System.err(1244): at dalvik.system.NativeStart.main(Native Method) 06-20 13:46:01.407: W/System.err(1244): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 06-20 13:46:01.418: W/System.err(1244): at android.os.Handler.(Handler.java:121) 06-20 13:46:01.418: W/System.err(1244): at android.app.Dialog.(Dialog.java:107) 06-20 13:46:01.418: W/System.err(1244): at android.app.AlertDialog.(AlertDialog.java:114) 06-20 13:46:01.427: W/System.err(1244): at android.app.AlertDialog.(AlertDialog.java:98) 06-20 13:46:01.427: W/System.err(1244): at android.app.ProgressDialog.(ProgressDialog.java:77) 06-20 13:46:01.427: W/System.err(1244): at ua.mirkvartir.android.frontend.adapter.JSONParser.getJSONFromUrl(JSONParser.java:79) 06-20 13:46:01.437: W/System.err(1244): at ua.mirkvartir.android.frontend.UserFunctions.loginUser(UserFunctions.java:64) 06-20 13:46:01.437: W/System.err(1244): at ua.mirkvartir.android.frontend.LoginActivity$Login.doInBackground(LoginActivity.java:280) 06-20 13:46:01.437: W/System.err(1244): at ua.mirkvartir.android.frontend.LoginActivity$Login.doInBackground(LoginActivity.java:1) 06-20 13:46:01.447: W/System.err(1244): at android.os.AsyncTask$2.call(AsyncTask.java:287) 06-20 13:46:01.447: W/System.err(1244): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 06-20 13:46:01.447: W/System.err(1244): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 06-20 13:46:01.457: W/System.err(1244): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 06-20 13:46:01.457: W/System.err(1244): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 06-20 13:46:01.457: W/System.err(1244): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 06-20 13:46:01.457: W/System.err(1244): at java.lang.Thread.run(Thread.java:856) 06-20 13:46:01.457: D/getting response(1244): true 06-20 13:46:01.467: D/work done(1244): true 06-20 13:46:01.477: W/dalvikvm(1244): threadid=11: thread exiting with uncaught exception (group=0x40a13300) 06-20 13:46:01.517: E/AndroidRuntime(1244): FATAL EXCEPTION: AsyncTask #1 06-20 13:46:01.517: E/AndroidRuntime(1244): java.lang.RuntimeException: An error occured while executing doInBackground() 06-20 13:46:01.517: E/AndroidRuntime(1244): at android.os.AsyncTask$3.done(AsyncTask.java:299) 06-20 13:46:01.517: E/AndroidRuntime(1244): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 06-20 13:46:01.517: E/AndroidRuntime(1244): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 06-20 13:46:01.517: E/AndroidRuntime(1244): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 06-20 13:46:01.517: E/AndroidRuntime(1244): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 06-20 13:46:01.517: E/AndroidRuntime(1244): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 06-20 13:46:01.517: E/AndroidRuntime(1244): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 06-20 13:46:01.517: E/AndroidRuntime(1244): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 06-20 13:46:01.517: E/AndroidRuntime(1244): at java.lang.Thread.run(Thread.java:856) 06-20 13:46:01.517: E/AndroidRuntime(1244): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 06-20 13:46:01.517: E/AndroidRuntime(1244): at android.os.Handler.(Handler.java:121) 06-20 13:46:01.517: E/AndroidRuntime(1244): at android.app.Dialog.(Dialog.java:107) 06-20 13:46:01.517: E/AndroidRuntime(1244): at android.app.AlertDialog.(AlertDialog.java:114) 06-20 13:46:01.517: E/AndroidRuntime(1244): at android.app.AlertDialog.(AlertDialog.java:98) 06-20 13:46:01.517: E/AndroidRuntime(1244): at android.app.ProgressDialog.(ProgressDialog.java:77) 06-20 13:46:01.517: E/AndroidRuntime(1244): at ua.mirkvartir.android.frontend.adapter.JSONParser.getJSONFromUrl(JSONParser.java:79) 06-20 13:46:01.517: E/AndroidRuntime(1244): at ua.mirkvartir.android.frontend.UserFunctions.loginUser(UserFunctions.java:64) 06-20 13:46:01.517: E/AndroidRuntime(1244): at ua.mirkvartir.android.frontend.LoginActivity$Login.doInBackground(LoginActivity.java:280) 06-20 13:46:01.517: E/AndroidRuntime(1244): at ua.mirkvartir.android.frontend.LoginActivity$Login.doInBackground(LoginActivity.java:1) 06-20 13:46:01.517: E/AndroidRuntime(1244): at android.os.AsyncTask$2.call(AsyncTask.java:287) 06-20 13:46:01.517: E/AndroidRuntime(1244): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 06-20 13:46:01.517: E/AndroidRuntime(1244): ... 5 more 06-20 13:46:01.857: W/EGL_emulation(1244): eglSurfaceAttrib not implemented
So I like to know the way to show progress dialog which will pop up wherever i need it. Can I show it when getJsonFromUrl is called and dismiss when getJsonFromUrl returns?
Upvotes: 1
Views: 163
Answers (1)
Reputation: 12181
create a Class:(just a model code..)
class Dialog{
public void showDialog(){
pd = new ProgressDialog(app);
pd.setOwnerActivity(app);
pd.setTitle("Идет загрузка...");
pd.setCancelable(true);
pd.show();
}
public void dismissDialog(){
pd.dismiss();
}
}
Now access it throught your app, whenevr u need the dialog.
Upvotes: 1
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