public void generateNumbers(){
progressBar.setVisibility(View.VISIBLE);
while(){
//approximately 5 second long procedure
}
printNumbers();
progressBar.setVisibility(View.GONE);
}
I want that the progress bar is visible when this long procedure in while loop is running and then dissapear. The code like this shown progressBar after the loop is finished and then also dissapear (setVisiblity(GONE)).
In while loop i don't have any new threads or AsyncTask
Use an asynctask like this
public class asyncTask extends AsyncTask<String, Void, String> {
private Context context;
private ProgressDialog dialog;
public asyncTask(Context cxt) {
context = cxt;
dialog = new ProgressDialog(context);
}
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog.setTitle("Please Wait...");
dialog.show();
}
#Override
protected void onPostExecute(String result) {
dialog.dismiss();
}
#Override
protected String doInBackground(String... arg0) {
//Put your code here
}
}
Related
I'm trying to display a ProgressDialog in my Activity while I'm executing a task with AsyncTask. Here my code below.
My problem is that onPreExecute() is called (I checked it with print) but my progressDialog is not shown while my function sendRequest is executed in doInBackground(..). I don't understand what it happens and I don't know how to solve that. I googled it but I didn't find any suitable solution. If you have any idea it would be great for me.
private static Activity activity;
private static ProgressDialog dialog;
public MyClass(Activity activity){
this.activity = activity;
}
public static String sendRequest(String request){
//do something
}
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = ProgressDialog.show(activity,
"ProgressDialog",
"Wait!");
}
#Override
protected String doInBackground(String... params) {
String result = sendRequest(params[0]);
return result;
}
#Override
protected void onPostExecute(final String result) {
dialog.dismiss();
}
Try:
progressDialog = new ProgressDialog(context);
progressDialog.setTitle("title");
progressDialog.setMessage("message");
progrsesDialog.show();
Try this
private class AsyncTaskRunner extends AsyncTask<String, String, String> {
ProgressDialog progressDialog;
#Override
protected void onPreExecute() {
progressDialog = ProgressDialog.show(CardPaymentActivity.this,
"Progress", "please wait...");
}
#Override
protected String doInBackground(String... params) {
publishProgress("sleep time..."); // Calls onProgressUpdate()
return null;
}
#Override
protected void onPostExecute(String result) {
progressDialog.dismiss();
}
#Override
protected void onProgressUpdate(String... text) {
}
}
and call AsyncTaskRunner class in your activity class like this
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_card_payment);
AsyncTaskRunner myTask = new AsyncTaskRunner();
myTask.execute();
}
I have a function for copy file in storage. When I click to copy Button, the method copy action will execute. This method below:
public void actionCopy() {
Dialog dialog = new Dialog(this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.progress_layout);
TextView progressTitle = (TextView) dialog.findViewById(R.id.progress_title);
progressTitle.setText("Copying...");
final ProgressBar progressBar = (ProgressBar) dialog.findViewById(R.id.progress_bar);
progressBar.setMax(listData.size());
progressBar.setProgress(0);
dialog.show();
for(int i = 0; i < listData.size(); i++) {
String value = new CopyDataUtils(listData.get(i)).execute().get();
progressBar.setProgress(i + 1);
Log.i(TAG, value);
}
}
And the CopyDataUtils AsyncTask:
public class CopyDataUtils extends AsyncTask<Void, Void, String> {
private DataItem item;
public CopyDataUtils(DataItem item) {
this.item = item;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(Void... params) {
//...code copy file here
return ...;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
}
}
So My problem is: When actionCopy execute, I want dialog show display. But did not happen. After for(..) executed, the dialog was show.
What something wrong?. Is there any suggestion for show dialog before execute multi thread copy data?.
Sorry my bad english!
**UPDATE:
I tried put dialog to AsyncTask and show it in to method onPreExecute. But nothing change.
Problem is new CopyDataUtils(listData.get(i)).execute().get();. It blocks the UI thread and waits if necessary for the computation to complete, and then retrieves its result.
The way you are using AsyncTask and dialog is completly wrong. You should move these code to AsynTask. On onPreexecute you should show dialog. doInbackground do you task and at onPostexecute hide dialog.
u should show the progress bar in onPreEcecute() of Asynctask
public void onPreExecute()
{
progressDialog = new ProgressDialog(activity);
progressDialog.setMessage("your content");
progressDialog.setMax(listData.size());
progressDialog.setProgress(0);
for(int i = 0; i < listData.size(); i++) {
String value = new CopyDataUtils(listData.get(i)).execute().get();
Log.i(TAG, value);
progressDialog.show();
}
#Override
protected String doInBackground(Void... params) {
return ...;
}
#Override
public void onPostExecute(String s)
{
progressBar.setProgress(i + 1);
}
You should make your ProgressBar as a global variable, then update the progress in onPostExcute() of AsyncTask
public void YouActiviy() {
ProgressBar progressBar;
int i = 0;
public onCreate(){
....
}
public void actionCopy() {
...
progressBar = (ProgressBar) dialog.findViewById(R.id.progress_bar);
...
dialog.show();
for(int i = 0; i < listData.size(); i++) {
new CopyDataUtils(listData.get(i)).execute();
//progressBar.setProgress(i + 1);
}
}
public class CopyDataUtils extends AsyncTask<Void, Void, String> {
...
#Override
protected void onPostExecute(String s) {
// update your progressbar here
progressBar.setProgress(i++);
super.onPostExecute(s);
}
}
}
For easy way, you follow this tutorial that will give you the correct way to use AsyncTask with ProgressBar
Hope this help
You should set progress in onProgressUpdate(), try this:
protected ProgressDialog mProgressDialog;
private class copyData extends AsyncTask<String, Integer, String> {
protected String doInBackground(Void... params) {
//copy data here
return ...;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog = new ProgressDialog(YourActivity.this);
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(true);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setCancelable(true);
mProgressDialog.show();
}
#Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgress(progress[0]);
}
protected void onPostExecute(String result) {
try {
if ((mProgressDialog != null) && mProgressDialog.isShowing()) {
mProgressDialog.dismiss();
}
} catch (final IllegalArgumentException e) {
// Handle or log or ignore
} finally {
mProgressDialog = null;
}
}
}
I want to implement a progress bar while a function is getting executed.This will help me to notify user that something is going on for updation.
But I am not able to see any progressbar instead I see Logcat message as progressBar dimensions.
class Async extends AsyncTask<Void, Void, String> {
#Override
protected void onPreExecute()
{
ProgressDialog progress=new ProgressDialog(App_list_Activity.this);
progress.setTitle("Please Wait while sync is in progress!!");
progress.setMessage("Database is getting updated...");
progress.setCancelable(true);
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.show();
}
#Override
protected String doInBackground(Void... arg0)
{
updateDatabase();
return null;
}
#Override
protected void onPostExecute(String result)
{
ProgressDialog progress=new ProgressDialog(App_list_Activity.this);;
progress.dismiss();
}
}
new Async().execute();
Where am I going wrong?
As the Android documentation states :
onProgressUpdate(Progress...), invoked on the UI thread after a call to publishProgress(Progress...). The timing of the execution is undefined. This method is used to display any form of progress in the user interface while the background computation is still executing. For instance, it can be used to animate a progress bar or show logs in a text field.
Try this:
private ProgressDialog progress;
class Async extends AsyncTask<Void, Void, String> {
#Override
protected void onPreExecute()
{ progress= new ProgressDialog(SingleContactActivity.this);
progress.setTitle("Please Wait while sync is in progress!!");
progress.setMessage("Database is getting updated...");
progress.setCancelable(true);
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.show();
}
#Override
protected String doInBackground(Void... arg0)
{
updateDatabase();
return null;
}
#Override
protected void onPostExecute(String result)
{
if (progress.isShowing())
progress.dismiss();
}
}
new Async().execute();
}
Declare ProgressDialog at class level :
class Async extends AsyncTask<Void, Void, String> {
ProgressDialog progress;
Initialize in onPreExecute() :
protected void onPreExecute() {
progress=new ProgressDialog(App_list_Activity.this);
Dismiss in onPostExecute() :
protected void onPostExecute(String result){
progress.dismiss();
In your code you again Initialize ProgressDialog in onPostExecute() for dismiss onPreExecute ProgressDialog so it will create new ProgressDialog instance and dismiss it but still onPreExecute() ProgressDialog is not dismiss.
Example :
class Async extends AsyncTask<Void, Void, String> {
ProgressDialog progress;
#Override
protected void onPreExecute()
{
progress=new ProgressDialog(App_list_Activity.this);
progress.setTitle("Please Wait while sync is in progress!!");
progress.setMessage("Database is getting updated...");
progress.setCancelable(true);
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.show();
}
#Override
protected String doInBackground(Void... arg0)
{
updateDatabase();
return null;
}
#Override
protected void onPostExecute(String result)
{
progress.dismiss();
}
}
new Async().execute();
You are creating one instance in onPreExecute and another in onPostExecute. You should keep the reference and dismiss that one.
On top of that I suggest keeping the member progress final, otherwise Android might scream about leak.
Furthermore, dismiss dialog should be in onCancelled as well.
class Async extends AsyncTask<Void, Void, String> {
private final ProgressDialog progress;
public Async(Context c) {
super();
this.progress = new ProgressDialog(c);
progress.setTitle("Please Wait while sync is in progress!!");
progress.setMessage("Database is getting updated...");
progress.setCancelable(true);
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
}
#Override
protected void onPreExecute() {
progress.show();
}
#Override
protected String doInBackground(Void... arg0) {
updateDatabase();
return null;
}
#Override
protected void onPostExecute(String result) {
if (progress.isShowing()) {
progress.dismiss();
}
super.onPostExecute(result);
}
#Override
protected void onCancelled() {
if (progress.isShowing()) {
progress.dismiss();
}
super.onCancelled();
}
}
new Async().execute();
HTH.
I'm trying to show a progress dialog while the twitter feed is loading up...However the progress dialog remains on screen when the twitter feed appears. Any help is much appreciated.
public class MainActivity extends ListActivity {
final static String twitterScreenName = "CFABUK";
final static String TAG = "MainActivity";
private AsyncTask<Object, Void, ArrayList<TwitterTweet>> tat;
boolean done;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
done=false;
AndroidNetworkUtility androidNetworkUtility = new AndroidNetworkUtility();
if (androidNetworkUtility.isConnected(this)) {
TwitterAsyncTask syn=new TwitterAsyncTask();
syn.execute(twitterScreenName,this);
ProgressDialog pd = new ProgressDialog(MainActivity.this);
pd.setMessage("loading");
pd.show();
do {
if(!(syn.getStatus()==AsyncTask.Status.RUNNING)) {
pd.dismiss();
pd.cancel();
done=true;
}
} while(done=false);
} else {
Log.v(TAG, "Network not Available!");
}
}
}
You must call ProgressDialog show() method on AsyncTasks onPreExecute(). For example:
class MyTask extends AsyncTask<Void, Void, Void> {
ProgressDialog pd;
#Override
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(MainActivity.this);
pd.setMessage("loading");
pd.show();
}
#Override
protected Void doInBackground(Void... params) {
// Do your request
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (pd != null)
{
pd.dismiss();
}
}
}
You must use a onPreExecute and onPostExecute of AsyncTask class. For example:
class AsyncData extends AsyncTask<Void, Void, Void>{
#Override
protected void onPreExecute() {
super.onPreExecute();
// init progressdialog
}
#Override
protected Void doInBackground(Void... arg0) {
// get data
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// dismiss dialog
}
}
The methods onPreExecute(), doInBackground() and onPostExecute() of AsyncTask are used for purpose that you mentioned -
public class MainActivity extends ListActivity {
final static String twitterScreenName = "CFABUK";
final static String TAG = "MainActivity";
private AsyncTask<Object, Void, ArrayList<TwitterTweet>> tat;
boolean done;
Context context;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
done=false;
context = this;
new NetworkTask().execute();
}
}
class NetworkTask extends AsyncTask<String, String, String>
{
Context ctx = context ;
#Override
protected void onPreExecute()
{
super.onPreExecute();
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Working ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected String doInBackground(String... args)
{
//Do your background work here and pass the value to onPostExecute
AndroidNetworkUtility androidNetworkUtility = new AndroidNetworkUtility();
if (androidNetworkUtility.isConnected(ctx)) {
TwitterAsyncTask syn=new TwitterAsyncTask();
syn.execute(twitterScreenName,this);
while(done)
{
if(!(syn.getStatus()==AsyncTask.Status.RUNNING))
{
done=true;
}
else
{
Log.v(TAG, "Network not Available!");
}
}
return done + "";
}
protected void onPostExecute(String result)
{
//Do something with result and close the progress dialog
pDialog.dismiss();
}
ProgressBar is best alternative for ProgressDialog. A user interface element that indicates the progress of an operation.
ProgressDialog is deprecated in latest versions.
For more info see android developer official site: https://developer.android.com/reference/android/widget/ProgressBar.html
I have an android application which in its main activity, data are adapted from sqlite db and shown in list view. I tried to use Progress dialog to show 'loading' message to user during fetching data from db. But the dialog does not disappear.
Here is the code :
public class BirthdayAlarmActivity extends ListActivity {
List<BirthdayContact> listofAvailableBirthdays;
ProgressDialog pDialog;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.birthday_list);
listofAvailableBirthdays=new ArrayList<BirthdayContact>();
ReinitializeList();
}
#Override
protected void onResume() {
ReinitializeList();
}
void ReinitializeList()
{
new LoadListView().execute();
if(listofAvailableBirthdays.size()>0)
{
//get ready the adapter
ArrayAdapter<BirthdayContact> ara=
new MyArrayAdapter(BirthdayAlarmActivity.this,listofAvailableBirthdays);
//set the adapter
setListAdapter(ara);
}
}
public class LoadListView extends AsyncTask<Void, Void, Void>
{
//ProgressDialog pDialog;
#Override
protected void onPreExecute() {
// Showing progress dialog before sending http request
pDialog = new ProgressDialog(
BirthdayAlarmActivity.this);
pDialog.setMessage("Please wait..");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
pDialog.show();
}
protected Void doInBackground(Void... unused) {
runOnUiThread(new Runnable() {
public void run() {
// increment current page
listofAvailableBirthdays.clear();
listofAvailableBirthdays=BirthdayHandler.GetTenBirthDays(BirthdayAlarmActivity.this);
}
});
return (null);
}
protected void onPostExecute(Void unused) {
// closing progress dialog
pDialog.dismiss();
}
}
I'm not familiar with the technique you're using, but I'll share what works for me:
final ProgressDialog progress = ProgressDialog.show(activity, "",
activity.getString(R.string.please_wait), true);
new Thread(new Runnable() {
#Override
public void run()
{
try {
--- network activity to retrieve information ---
}
finally {
activity.runOnUiThread(new Runnable() {
#Override
public void run()
{
if ((progress != null) && progress.isShowing())
progress.dismiss();
}
});
}
}
}).start();
I think the problem here is that you're referring to your pDialog and trying to create it in a different class than the one you've declared it in.
You should try using showDialog, dismissDialog and onCreateDialog methods to add a layer of abstraction and that the dialog is being called in the correct class/thread. You can use a Handler aswell as an alternative.
try something like this:
public class BirthdayAlarmActivity extends ListActivity {
List<BirthdayContact> listofAvailableBirthdays;
ProgressDialog pDialog;
static final int LOADING_DIALOG = 1;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.birthday_list);
listofAvailableBirthdays=new ArrayList<BirthdayContact>();
ReinitializeList();
}
#Override
protected void onResume() {
ReinitializeList();
}
void ReinitializeList()
{
new LoadListView().execute();
if(listofAvailableBirthdays.size()>0)
{
//get ready the adapter
ArrayAdapter<BirthdayContact> ara=
new MyArrayAdapter(BirthdayAlarmActivity.this,listofAvailableBirthdays);
//set the adapter
setListAdapter(ara);
}
}
#Override
protected Dialog onCreateDialog(int id)
{
switch(id)
{
case LOADING_DIALOG:
// Showing progress dialog before sending http request
pDialog = new ProgressDialog(
BirthdayAlarmActivity.this);
pDialog.setMessage("Please wait..");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
return pDialog;
}
}
public class LoadListView extends AsyncTask<Void, Void, Void>
{
#Override
protected void onPreExecute() {
showDialog(LOADING_DIALOG);
}
protected Void doInBackground(Void... unused) {
runOnUiThread(new Runnable() {
public void run() {
// increment current page
listofAvailableBirthdays.clear();
listofAvailableBirthdays=BirthdayHandler.GetTenBirthDays(BirthdayAlarmActivity.this);
}
});
return (null);
}
protected void onPostExecute(Void unused) {
dismissDialog(LOADING_DIALOG);
}
}
If this fails, you should look int using messaging via the Handler class.