I need to show simple progress bar dialog while some method not finish.
I Try to call it like
ProgressDialog progressDialog = ProgressDialog.show(Activity.this, "", "Please wait");
SyncCity()
SyncStreet()
progressDialog.dismiss();
But than app is blocked while method not finish,after that i get progress dialog,and in next second dissapear, sometimes i not See it at all.
All calling is going on button click...
Where is catch?
Thank You.
That's because you're blocking the UI thread. Try using AsyncTask, like this:
ProgressDialog progressDialog;
new AsyncTask<Void, Void, Void>() {
#Override
protected void onPreExecute() {
progressDialog = ProgressDialog.show(Activity.this, "", "Please wait");
}
#Override
protected Void doInBackground(Void... params) {
SyncCity()
SyncStreet()
return null;
}
#Override
protected void onPostExecute(Void args) {
progressDialog.dismiss();
}
}.execute();
You should use an AsyncTask to do such processes. You shouldn't do any process in the UI thread.
Here is a good example on how to use AsyncTask:
http://www.vogella.com/tutorials/AndroidBackgroundProcessing/article.html
Related
how to show progress bar while loading images. I have tried the code given below
Picasso.with(getActivity())
.load(stage1ImageURL)
.placeholder(android.R.layout.simple_spinner_item)
.error(R.drawable.no_image).into(stage1ImageView);
Take a look at the official docs how to deal with a progress bar.
In your case, you have to write an AsyncTask, which starts the dialog in onPreExecute() and ends in onPostExecute().
Try this, it uses AsyncTask:
public class LoadData extends AsyncTask<Void, Void, Void> {
ProgressDialog progressDialog;
//declare other objects as per your need
#Override
protected void onPreExecute()
{
//show loading dialog
progressDialog= ProgressDialog.show(YourActivity.this, "Progress Dialog Title Text","Process Description Text", true);
//do initialization of required objects objects here
};
#Override
protected Void doInBackground(Void... params)
{
//do loading operation here
return null;
}
#Override
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
progressDialog.dismiss();
};
}
You can call this using from your onCreate():
LoadData task = new LoadData();
task.execute();
You have to use
progressBar.setVisibility(View.VISIBLE);
to show progressBar. And to hide it,
progressBar.setVisibility(View.GONE);
Follow this link for complete code.
I am new in android. I am trying to display ProgressDialog when click on button .
This is my code:
// set listener
btn_Login.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//progress.show();
MyAsynch asynch = new MyAsynch();
asynch.execute();
}
In this code progress dialog too much late appear when i am comment on Asynctask object then progress dialog appear normally.
I am puting my progress dialog in
AsynchTask method
onPreExecute() but same out put dialog display late .
How to solve my problem..??
I am also read stack answers following link but not solve my problem .
async task progress dialog show too late
ProgressDialog appears too late and dissapears too fast
here is my Asynctask code
private class MyAsynch extends AsyncTask<String, Void, String> {
ProgressDialog progress;
String login_stat;
String stat;
#Override
protected void onPreExecute() {
progress = new ProgressDialog(this);
progress.setTitle(" User Login ");
progress.setMessage("Please Wait!!");
progress.setCancelable(false);
progress.setIndeterminate(true);
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.show();
}
#Override
protected String doInBackground(String... urls) {
try {
login_stat = s_ApiHandling.doLogin(m_Et_Username.getText()
.toString().trim(), m_Et_Password.getText()
.toString().trim());
} catch (Exception e) {
System.out.println("internet connection loss ");
stat = "ERORR";
e.printStackTrace();
}
return stat;
}
#Override
protected void onPostExecute(String status) {
progress.dismiss();
}
}
You are probably doing too much in onPreExecute
Remove progress.cancel() from your doInBackground method and put it in to a onPostExecute method in your AsyncTask (like the second link you posted)
You shouldn't have anything talking to the UI in a background thread - that should all be done in pre/post execution.
you code should look like this:
AsyncTask<String, Void, String>()
{
private ProgressDialog progressDialog = ProgressDialog.show(this, "", "Loading...");
#Override
protected void onPostExecute(String result)
{
progressDialog.dismiss();
}
#Override
protected String[] doInBackground(String... params)
{
//ALL CODE GOES HERE.
}
}
When you call the asynctask you must not use the get() method or the progress dialog won't work correctly.
I defined an AsyncTask in a button's onclicklistener, and once user clicks the button, ideally progress dialog shows while asynctask downloading.
However, progress dialog just flashes in and disappears before the results returned, and the button gets focused while the asynctask works in the background.
Can someone help me figure out what I did wrong here? Code snippet:
final ProgressDialog progressDialog = new ProgressDialog(context);
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
((Button)findViewById(R.id.buttonLoginActivity)).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
AsyncTask<Void, Void, Void> downloadTask= new AsyncTask<Void, Void, Void>(){
#Override
protected Void doInBackground(Void... params) {
String data = Service.getSomeData();
context.getContentResolver.notifyChange("content://some_url");
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if(progressDialog== null) return;
if(progressDialog!=null) {
progressDialog.dismiss();
progressDialog = null;
}
}
};
progressDialog.show();
downloadTask.execute();
try{
downloadTask.get();
}catch(Exception e){
e.printStackTrace();
return;
}
}
});
Don't use get()
downloadTask.get();
this is a blocking call. From the Docs
Waits if necessary for the computation to complete, and then retrieves its result.
Just use execute() as you are then do what you need with the results in onPostExecute()
show the progressDialog on the onPreExecute which need to be writen, and it will run on the UI thread, not in background ( android 4 )
also I would call the async task on a new Handler().post(myAsynctaskcaller)
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.show();
}
Ive looked at some questions and non answer the problem im having..
I have this asyncTask...
private class LoadData extends AsyncTask<Void, Void, Void>{
protected Void onPreExecute(Void...arg0){
super.onPreExecute();
ProgressDialog dialog = ProgressDialog.show(shoppingClass.this, "",
"Loading. Please wait...", true);
dialog.show();
return null;
}
#Override
protected Void doInBackground(Void... params) {
item = we.getText().toString();
getUserPreference();
itemLookup.loadUrl(url);
return null;
}
#Override
protected void onPostExecute(Void notused){
itemLookup.setVisibility(View.VISIBLE);
}
}
The problem is the progessDialog is not showing up? I dont know why...Im doing everything write according to the documentation.
You are not overriding correctly the method. Change onPreExecute to this:
#Override
protected void onPreExecute() {
super.onPreExecute();
ProgressDialog dialog = ProgressDialog.show(shoppingClass.this, "",
"Loading. Please wait...", true);
dialog.show();
}
it could just be that doinbackground is completing too quickly for you to be able to see the dialog.
Check that shoppingClass.this has the UI context. Also, you shouldn't have to call .show() twice on it and you don't have to return null as its void (lowercase).
I am using a ProgressDialog to be shown while my background process goes on, but after background process is completed the ProgressDialog is not dismissed still.
Here is my code
private class async extends AsyncTask<String, Void, Boolean> {
final ProgressDialog progressDialog = new ProgressDialog(getParent());
#Override
protected Boolean doInBackground(String... params) {
GetJson json = new GetJson();
boolean success = false;
JSONObject mJsonObject = json
.readJsonObject("url");
try {
success = mJsonObject.getBoolean("success");
} catch (Exception e) {
}
return success;
}
#Override
protected void onPostExecute(Boolean result) {
if (result) {
if (progressDialog.isShowing())
progressDialog.dismiss();
}
}
}
#SuppressWarnings("static-access")
#Override
protected void onPreExecute() {
progressDialog.show(getParent(), "Working..", "Please wait...");
}
}
private final class YourTask extends AsyncTask<Void, Void, Object> {
private ProgressDialog dialog;
#Override
protected void onPreExecute() {
dialog = ProgressDialog.show(YourActivity.this, "Title", "Message", true);
}
#Override
protected Object doInBackground(final Void... params) {
// Doing something
}
#Override
protected void onPostExecute(final Object result) {
// Check result or something
dialog.dismiss();
}
}
You can call progressDialog.dismiss() in your AsyncTask's onPostExecute() method.
In onPostExecute() method call dismiss() on your dialog.
I dont know, if you solved this problem, probably yes.
But for next users what will have the same problem (i had it right now too)..
The problem is in your declaration.
final ProgressDialog progressDialog = new ProgressDialog(getParent());
or in your "second" declaration
progressDialog.show(getParent(), "Working..", "Please wait...");
Because in the first one you put in there the getParent parameter (probably MainActivity.this)
and the same you do in calling show method.
Therefore is there 2 parents.. and if you call dismiss() in post execute..it dismiss the first one..but not the another one what have then dialog.isShowing() equal to false.
So important is have there just 1!!!!! parent content..so you can assign the content in declaration with:
new ProgressDialog(content);
or you can do
ProgressDialog dialog=new ProgressDialog();
dialog.setMessage("Loading");
dialog.show(getParent());
and then dismiss it and everything is allright.
or you can do:
ProgressDialog dialog=new ProgressDialog(getParent());
dialog.setMessage("Loading");
dialog.show();
but never give in there twice parents, contents, whatever..
AsyncTasks should not handle at ALL a dialog. Dismissing the dialog in the PostExecute phase can easily lead to an IllegalStateException as the underlying activity can already be destroyed when the dialog gets dismissed. Before destroying the activity the state of the activity will be saved. Dismissing the dialog afterwards will lead to an inconsistent state.