I am trying to make a simple AsynTask sample. I can't make it run. When I click the Button, ProgressDialog is supposed to be displayed. But nothing happens. I don't get any Exceptions. Probably I'm missing out a few things.
ProgressDialog dialog=null;
Button btnstart;
MyAsynTask mytask;
static final int SLEEP_TIME=(15*1000)/100;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnstart=(Button)findViewById(R.id.button1);
btnstart.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
mytask=new MyAsynTask();
mytask.execute();
}
});
}
public class MyAsynTask extends AsyncTask<Void, Integer, Void>{
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog=new ProgressDialog(MainActivity.this);
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.show();
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
for (int i = 0; i < 100; i++) {
if(isCancelled()){
break;
}
else {
publishProgress(i);
}
}
return null;
}
#Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
dialog.setProgress(values[0]);
}
You are doing it right.
Use Logs in onPreExecute(),doInBackBackground() to see what's happening actually.
Add one more method to Asynctask class
onPostExcute()
{
dialog.dismiss();
}
OnPost method in the asynctask excutes after doinbackgournd method there you need to dismiss the dialog
Related
I am showing some animation and making network request at the same time. Both are working fine independently. But when I try to place a progress dialog in asynctask the animation is not started until progress dialog until the onPostExecute(). My guess is that as the animation and progressdialog both run on the UI thread so only one can run at a time. Is there a way to show progress dialog and run animation at the same time both on the UI thread?
Here's my code:
public class DailyTarrotActivity extends FragmentActivity {
ImageView imageViewAnimation;
AnimationDrawable spinAnimation;
AnimatorSet set = new AnimatorSet();
FlipImageView imageViewCard;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_daily_tarrot);
imageViewAnimation = (ImageView) findViewById(R.id.imageViewAnimation);
imageViewAnimation.setBackgroundResource(R.drawable.spin_animation);
imageViewCard = (FlipImageView) findViewById(R.id.imageViewCard);
spinAnimation = (AnimationDrawable) imageViewAnimation.getBackground();
new DailyTarrotAsyncTask().execute();
}
#Override
public void onWindowFocusChanged(boolean hasFocus) {
// TODO Auto-generated method stub
super.onWindowFocusChanged(hasFocus);
Log.d("start", "focuschange");
if (hasFocus) {
spinAnimation.start();
}
}
public class DailyTarrotAsyncTask extends AsyncTask<Void, Void, Void> {
ProgressDialog pd;
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pd = new ProgressDialog(DailyTarrotActivity.this);
pd.setCancelable(false);
pd.show();
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
Thread thread = new Thread();
try {//just to mimic downloading behaviour
thread.sleep(10000);//animation starts only after 10 secs
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
pd.dismiss();
Toast.makeText(DailyTarrotActivity.this, "async task finished",
Toast.LENGTH_SHORT).show();
}
}
}
I want to use progress bar while downloading from server,Actually i was using progressDialog but it will be good look if i use progressBar instead of progressDialog.I have following code for Progress dialog .
public class FeaturedData extends AsyncTask<Void, Void, Void> {
Home home;
ProgressDialog dialog = null;
public FeaturedData(Home home) {
// TODO Auto-generated constructor stub
this.home = home;
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
//calling here method
return null;
}
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
dialog.dismiss();
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog = ProgressDialog.show(home, "", "", true);
}
As per your below comment:
Actually i want to do it programatically don't want to declare in xml.
=> i would suggest you to take it inside the XMl layout.
Inside the onPreExecute(), make it visible using progressBar.setVisibility(View.VISIBLE)
and inside the onPostExecute(), make it GONE by using progressBar.setVisibility(View.GONE)
As I created a Progress bar using below code in a on click method of button. but after clicking button it takes 2-3 seconds to display progress bar.how to reduce that delay to start progress bar.
public void getProgressBar() {
progressBar = new ProgressDialog(this);
progressBar.setCancelable(true);
progressBar.setMessage("Loading...");
progressBar.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressBar.show();
progressBarStatus = 0;
new Thread(new Runnable() {
public void run() {
while (progressBarStatus < 100) {
progressBarStatus = doSomeTasks();////I am loading service
progressBarHandler.post(new Runnable() {
public void run() {
progressBar.setProgress(progressBarStatus);
}
});
}
if (progressBarStatus >= 100 ) {
progressBar.dismiss();
startActivity(new Intent(getApplicationContext(),
StatisticDisplay.class));
}
}
}).start();
}
public class BackgroundAsyncTask extends AsyncTask<Void, Integer, Void> {
int myProgress;
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
myProgress = 0;
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
while(myProgress<100){
myProgress++;
publishProgress(myProgress);
SystemClock.sleep(100);
}
return null;
}
#Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
progressBar.setProgress(values[0]);
}
}
Use an AsyncTask instead. The example code in the link gives a good introduction on how to do it. In essence you do the job in doInBackground(), publish your progress using onProgressUpdate() and start your activiy in onPostExecute().
I'd like my application to show the indefinite progress bar (you know, the cycle) into the Activity's layout, just like the youtube Application. How could I do that? Thanks.
Hi you can use setProgressBarIndeterminateVisibility(boolean) to show indefinite progress bar.Here is the sample code:
private Button buttonUpStartUpload = null;
private boolean mToggleIndeterminate = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.lyt_upload_main);
setProgressBarIndeterminateVisibility(mToggleIndeterminate);
buttonUpStartUpload = (Button) findViewById(R.id.buttonUpStartUpload);
buttonUpStartUpload.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
UploadingAsyncTask uploadingAsyncTask = new UploadingAsyncTask();
uploadingAsyncTask.execute("temp","doinback","returnparam");
}
});
}//onCreate Ends
#Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
}
public class UploadingAsyncTask extends AsyncTask<String, String, String>{
Uploader uploader = new Uploader();
ProgressDialog progDialogUpload = null;
int imageIndex = 1;
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
mToggleIndeterminate = !mToggleIndeterminate;
setProgressBarIndeterminateVisibility(mToggleIndeterminate);
}
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
publishProgress("Finish","3");
return "success";
}
#Override
protected void onProgressUpdate(String... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
if(values[0] == "Finish"){
imageIndex++;
}
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if(result.equalsIgnoreCase("success") || result == "success"){
mToggleIndeterminate = !mToggleIndeterminate;
setProgressBarIndeterminateVisibility(mToggleIndeterminate);
}
}
}//UploadingAsyncTask ends
hi guy
m using a asynctask for running a progressbar. i am using it for showing my songs duration.i want that when i press stop Button, the asynctask should be stop and progressbar should reach on initial position.
public class BackgroundAsyncTask extends
AsyncTask<Void, Integer, Void> {
int myProgress;
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
Toast.makeText(AudioPlayer2.this,
"onPostExecute", Toast.LENGTH_LONG).show();
seekbar.setClickable(true);
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
Toast.makeText(AudioPlayer2.this,
"onPreExecute", Toast.LENGTH_LONG).show();
myProgress = 0;
//seekbar.setProgress(myProgress);
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
while(myProgress<100){
myProgress++;
//seekbar.setProgress(myProgress);
publishProgress(myProgress);
Log.d("AAAAAAAAAAAAAAAAAAAAAAAAAAAAA", bundleDuration);
SystemClock.sleep(2000) ;
}
return null;
}
#Override
protected void onCancelled() {
super.onCancelled();
// myProgress=0;
// seekbar.
publishProgress(0);
seekbar.setProgress(0);
}
#Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
seekbar.setProgress(values[0]);
}
}
//=====================================
for starting and stopping m using this code
public void onClick(View src) {
switch (src.getId()) {
case R.id.buttonStart:
new BackgroundAsyncTask().execute();
break;
case R.id.buttonStop:
backgrondasynctask.cancel(true);
break;
I think you use wrong method for this example. You can easily implement progress bar. Here is a nice article,http://blog.sptechnolab.com/2011/01/17/android/simple-progress-bar-in-android-using-thread/ contains example to implement progress bar. Through this example you can easily start, stop and play the progress bar.