Develop Reference

Why Progress Dialog is not open while clicking on Submit Button

I have set the IP of Ethernet. here i am creating the file on a specific path and run the code of IP set i.e.,sudo.
Everything works well but It is not showing the progress dialog box on the click of the submit button but all other functions mentioned in the setOnClickListener are working properly.
Can anybody help me.
submt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
validationIP();
if (var == true) {
ProgressDialog progressdialog = new ProgressDialog(Third_Ethernet_Layout.this);
progressdialog.setMessage("Please Wait....");
progressdialog.show();
progressdialog.setCancelable(false);
progressdialog.setCanceledOnTouchOutside(false);
try {
File file = new File(filepath);
file.createNewFile();
} catch (Exception e) {
e.printStackTrace();
}
write();
sudo(ipfetch, netmaskfetch, gatewayfetch, dns1fetch, dns2fetch);
progressdialog.dismiss();
finish();
Toast.makeText(Third_Ethernet_Layout.this, "Ethernet IP Change Successfully", Toast.LENGTH_SHORT).show();
}
}
});

You are using progressdialog.dismiss(); so that progressdialog is dismissed.
You should user asunc Task for it
private class AsyncAboutUs extends AsyncTask<Void, Void, Void> {
private ProgressDialog progressDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
progressdialog = new ProgressDialog(Third_Ethernet_Layout.this);
progressdialog.setMessage("Please Wait....");
progressdialog.show();
progressdialog.setCancelable(false);
progressdialog.setCanceledOnTouchOutside(false);
}
#Override
protected Void doInBackground(Void... strings) {
try {
File file = new File(filepath);
file.createNewFile();
} catch (Exception e) {
e.printStackTrace();
}
write();
sudo(ipfetch, netmaskfetch, gatewayfetch, dns1fetch, dns2fetch);
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
if (!isCancelled()) {
finish();
}
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
}
}
}
ON Button Click :
submt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
validationIP();
if (var == true) {
new AsyncAboutUs().execute();
}
}
});

The code for showing progress dialog is working fine, may be the process is fast and thats why the progress dialog is not visible.
can try using a thread sleep to actually see if there is an issue with it.

It does show the progress but you hide it immediately by calling dismiss() and further by finish().
However, doing your heavy task inside the handler is an incorrect way to achieve what you want. It would not work as you think anyway. What will happen is that your code will block UI thread inside handler and no progress will be shown (and application will potentially be killed if you hold long enough).
The correct way to do this is to implement an AsyncTask, there is a straightforward code example in this documentation link. You need to show() progress dialog, execute the async task, perform your file etc. code in doInBackground() and update progress values by publishProgress on the way.
In the onProgressUpdate(), update the dialog or required fields and, finally, in onPostExecute do the finish() or other actions you wish on completion.

how to make one asynctask to start after the other one?

what i have is two asynctask each one call a function to parse some data ... and i want the asynctask starts after asynctasknew finish how can i do this??? here is my code ..
send.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
AsyncCallWS task = new AsyncCallWS();
try{
Intent newintent = getIntent();
mixlist=newintent.getStringArrayListExtra("listmix");
Log.e("listmix",mixlist+"");
for(int i=0;i<=mixlist.size();i++){
if(i==mixlist.size()){
Log.d("states","finished");
Item_Name="0";
Item_Price="0";
Item_Quantity="0";
Total_Price="0";
Customer_Name=name.getText().toString();
Log.e("customer_name",Customer_Name);
Customer_Number=mobile.getText().toString();
Customer_Address=addressnew.getText().toString();
//Call execute
task.execute();
}
else{
Item_Name=mixlist.get(i);
i++;
Item_Price=mixlist.get(i);
i++;
Item_Quantity=mixlist.get(i);
i++;
Total_Price=mixlist.get(i);
Customer_Name="0";
Customer_Number="0";
Customer_Address="0";
// AsyncCallWSnew tasknew = new AsyncCallWSnew();
//Call execute
AsyncCallWSnew tasknew = new AsyncCallWSnew();
tasknew.execute();
}
}
}
catch(Exception e){
e.printStackTrace();
}
}
});
}
private class AsyncCallWS extends AsyncTask<Void, Void, Void> {
protected void onPostExecute(Void result) {
//Make Progress Bar invisible
Toast.makeText(getApplicationContext(), "order has been sent + item price", Toast.LENGTH_LONG).show();
Intent intObj = new Intent(PersonalInfo.this,MainActivity.class);
startActivity(intObj);
//Error status is false
}
//Make Progress Bar visible
protected void onPreExecute() {
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
loginStatus = WebService.invokeLoginWS(Item_Name,Item_Price,Item_Quantity, Total_Price, Customer_Name,
Customer_Number, Customer_Address,"InsertData");
return null;
}
}
private class AsyncCallWSnew extends AsyncTask<Void, Void, Void> {
protected void onPostExecute(Void result) {
//Make Progress Bar invisible
Toast.makeText(getApplicationContext(), "order has been sent", Toast.LENGTH_LONG).show();
Intent intObj = new Intent(PersonalInfo.this,MainActivity.class);
startActivity(intObj);
//Error status is false
}
//Make Progress Bar visible
protected void onPreExecute() {
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
loginStatus = WebService.invokeLoginWS(Item_Name,Item_Price,Item_Quantity, Total_Price, Customer_Name,
Customer_Number, Customer_Address,"InsertData");
return null;
}
}
}
when i make a debug my code works just fine .. but in normal run .. it doesn't can any help me?

There are basically two possibilities:
Simply start the next AsyncTask from onPostExecute() of the previous one
Use AsyncTask.executeOnExecutor() with SerialExecutor and start all of them in a row.

Hi You can use AsyncTask executeonExecutor method to start the async task. But it will require minimum API version 11. Kindly refer the following code.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
new YourFirstTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,params...);
new YourSecondTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,params...);
}else{
new YourFirstTask().execute(params...);
new YourSecondTask().execute(params...);
}
For Lower version you can call directly. automatically system will process one by one.

How to dismiss dialog while doInBackground is running in asynctask?

I am trying to cancel a dialog from the mainthread while the 'doInBackGround' method of AsyncTask is running. While I am downloading a photo, a progress dialog pops up and when it is finished downloading I dismis() the dialog in onPostExecute. If the connection is slow, the dialog is up for a while and I cannot cancel it until there is a timeout error or it finishes downloading. How do I use the back-button so the main thread can access. Here is what my code looks like:
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
protected void onPreExecute() {
//this piece code doesn't seem to work
progressDialog = ProgressDialog.show(context, "",
"Image loading", true);
}
protected Bitmap doInBackground(String... urls) {
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
//bmImage.setImageBitmap(result);
progressDialog.dismiss();
someMethod(result);
}
}

Use a cancellable progress dialog, pass in a cancel listener to the progress dialog and cancel the task within that method, eg
protected void onPreExecute() {
progressDialog = ProgressDialog.show(activity, "Searching files", "Scanning...", true, true,
new DialogInterface.OnCancelListener() {
#Override
public void onCancel(DialogInterface dialog) {
// When dialog in cancelled, need to explicitly cancel task otherwise it keeps on running
cancel(true);
}
}
);
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
}

You can intercept the onBackKeyPressed event, and cancel the task using cancel method.
See that link:
Ideal way to cancel an executing AsyncTask

You can try to use a ProgressDialog which is cancelable. This is the signature of the method:-
public static ProgressDialog show (Context context, CharSequence title, CharSequence message, boolean indeterminate, boolean cancelable)

show progressbar when database copying

In the first run of my app, i have to copy database file to data folder. it takes about 10 sec and in this period of time user sees a black screen. I want to use AsynTask technique to show a progressbar. but it doesnt work an i see that progressbar after black screen goes away...
with this code i call copy database class and also i call AsynTsk process...
new asyn().execute();
try {
myDbHelper.createDataBase();
} catch (IOException ioe) {
// throw new Error("Unable to create database");
}
and this is my AsynTask code:
public class asyn extends AsyncTask<String, Integer, String> {
ProgressDialog dialog;
#Override
protected void onPreExecute()
{
//loading toast
//final DataBaseHelper myDbHelper = new DataBaseHelper(this);
String firstload2 = myDbHelper.getfirstload();
if(firstload2.matches("1")) {
dialog=new ProgressDialog(DictionaryActivity.this);
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setMax(100);
dialog.show();
myDbHelper.changefirstload();
}
}
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
// perform desired task in this doInBackground Block.
for(int i=0;i<20;i++)
{
publishProgress(5);
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return "";
}
#Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
dialog.incrementProgressBy(5);
}
#Override
protected void onPostExecute(String result)
{
dialog.dismiss();
AlertDialog.Builder a=new Builder(DictionaryActivity.this);
a.setMessage("Successfully Done");
a.setTitle("Try");
a.setPositiveButton("OK",null);
a.show();
}
}
where is my fault? how i can fix that?

myDbHelper.changefirstload(); should be within the doInBackground() method. onPreExecute() executes on the UI thread.
In terms of a progress bar, that's a bit difficult here. Personally, I'd do an indeterminate progress bar (just a spinning icon or something while it loads). If you want to have a % bar, though, you will need to break up the method into multiple methods, then update your progress in between them.

Using of Toast with thread in android

progressDialog = ProgressDialog.show(GetResponse.this, "", "Loading...");
new Thread()
{
public void run()
{
try
{
// inside i have written code for making connection to the server using SSL connection.
}catch (Exception e)
{
progressDialog.dismiss();
exception(e.getMessage())
}.start();
}
private void exception(String msg)
{
Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
this.finish();
Intent i = new Intent(getBaseContext(), LoginPage.class);
startActivity(i);
}
my LoginPage.java is previous activity.
If the connection is successfull it goes to the next activity ot doesnt give any error,
But if der is any prob with connection then i want progress bar should be stopped and go back to the LoginPage activity and also i want the error msg to be displayed.
From the above im getting some error.. Please help me out on this

Pass in and use the context from LoginPage. Also, use the 101010 button to format your code as code in your posts.

you can go up by using try catch mechanism where in your catch place your toast message and u can do it also by asynchronous task,
here simple code
private class Task_News_ArticleView extends AsyncTask<Void, Void, Void> {
private final ProgressDialog dialog = new ProgressDialog(
Bru_Sports_View.this);
// can use UI thread here
protected void onPreExecute() {
this.dialog.setMessage("Loading...");
this.dialog.setCancelable(false);
this.dialog.show();
}
#Override
protected Void doInBackground(Void... params) {
try {
//here the condition to check login details
}
} catch (Exception e) {
}
return null;
}
protected void onPostExecute(Void result) {
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
}
}
and u can also use try,catch in catch block you can place your toast message
with finsih() method