Develop Reference

How to implement rotate animation ProgressDialog with asynctask

I show my rotate animation inside progressdialog before execute asynctask with this code
ProgressDialog pDialog = ProgressDialog.show(getActivity(), null, null, true, false);
pDialog.setContentView(R.layout.loading);
this is R.layout.loading xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/ln_loadingcontainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#00000000">
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#android:style/Widget.ProgressBar.Large"
android:layout_gravity="center"/>
<TextView
android:id="#+id/tv_loading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Loading..."
android:textSize="24dp"
android:textColor="#ffffff"
android:layout_marginTop="5dp"
android:layout_gravity="center"/>
</LinearLayout>
Then i excute my asynctask. The problem when asynctask doInbackground my ProgressDialog is not display animation.
After asynctask onPostExecute my ProgressDialog is start animation.
Why on doInbackground my ProgressDialog not display animation?
How to solve it?
I want to display rotate animation inside dialog before excute asynctask and hide dialog after asynctask excute finish.
EDIT
1.global variable of ProgressDialog
private ProgressDialog pDiaalog;
2.in oncreate of activity
gv_table.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
progressDialog = ProgressDialog.show(getActivity(), null, null, true, true);
progressDialog.setContentView(R.layout.loading);
MyTask t = new MyTask();
t.execute();
}
});
3.MyTask
private class MyTaskextends AsyncTask<String, Void, String>{
public MyTask(){
}
#Override
protected String doInBackground(String... params) {
RunExecute();
return null;
}
#Override
protected void onPostExecute(String result) {
if (pDialog != null) {
if (pDialog.isShowing())
pDialog.hide();
}
}
#Override
protected void onPreExecute() {
if(IsShowProgress) {
if (pDialog != null)
pDialog.show();
}
super.onPreExecute();
}
#Override
protected void onProgressUpdate(Void... values) {
}
}
When MyTask doInBackground the progressdialog not spinning (doInBackground usage time about 5 sec).
But after onPostExecute finish It's start spinning again.
I test it's by ban "pDialog.hide();" in onPostExcute;

ProgressDialog pDialog;
onPreExecure()
pDialog = ProgressDialog.show(MainActivity.this, null, null, true, false);
pDialog.setContentView(R.layout.loading);
onPostExecute()
if(pDialog.isShowing())
{
pDialog.dismiss();
}

Android. ProgressBar doesn't work?

I loading some data from a database and I'd like to display a circle animation during this, because it's take time. The circle appears but only after loadContent() which load data.
The code:
final String PREFS_NAME = "MyPrefsFile";
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
ProgressBar p = (ProgressBar) findViewById(R.id.imgProgress);
p.setEnabled(true);
if (settings.getBoolean("my_first_time", true)) {
// the app is being launched for first time, do something
Log.d("Launched:", "first time");
loadContent();
// record the fact that the app has been started at least once
settings.edit().putBoolean("my_first_time", false).commit();
}
p.setEnabled(false);
In XML:
<ProgressBar
android:id="#+id/imgProgress"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_centerInParent="true"
android:layout_height="wrap_content" />

Why not just do this ?
public class SomeTask extends AsyncTask<Void, String, Void>{
ProgressDialog dialogue;
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
dialogue.dismiss();
//If Using some adapter; someadapteradapter.notifyDataSetChanged();
}
#Override
protected void onPreExecute() {
dialogue = new ProgressDialog(ProgressBar.this);
dialogue.setTitle("Loading items..");
dialogue.show();
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... params) {
//Your task!!
return null;
}
}
What can be more simple than this..:)

I don't know what is loadContent method but I'd suggest you to do an AsyncTask (if it's not the case). You will be able to show/hide your ProgressBar as follows:
// loadContent method
public class loadContent extends AsyncTask<String, Void, String> {
#Override
protected void onPreExecute() {
// set your progress bar to visible
((ProgressBar) findViewById(R.id.imgProgress)).setVisibility(View.VISIBLE);
}
#Override
protected String doInBackground(String... params) {
// do some stuff: load datas from sql, load images.. whatever
// and return a string value for onPostExecute (string = "Loaded"
return string;
}
#Override
protected void onPostExecute(String result) {
if(result.equals("Loaded") {
// the loading is finish, display your datas
// set your progress bar to gone
((ProgressBar) findViewById(R.id.imgProgress)).setVisibility(View.GONE);
}
}
}
Here and here, you will see a good example of an AsyncTask method. Then, you just have to add the visibility attribute to your view as:
<ProgressBar
android:id="#+id/imgProgress"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_centerInParent="true"
android:layout_height="wrap_content"
android:indeterminate="true"
android:visibility="gone" />
Hope this helps.

How to create a custom Progress Dialog(spinner)?

I have googled a lot and even gone through many of this website questions but I just can't find the solution to my problem.
I want to create a spinner like the one below. This is just a normal spinner I have done till now. I tried a variety of spinner examples but they don't give me my desired result.
Here is my code:
public class nextclass extends Activity {
Thread t;
ProgressBar dia;
private ProgressDialog progressDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
MainActivity.progressDialog.dismiss();
setContentView(R.layout.nextclassview);
// requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
((Button) findViewById(R.id.button1))
.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
// progressDialog = findViewById(R.id.progressBar1);
new AuthenticateUserTask().execute();
}
});
}
private class AuthenticateUserTask extends AsyncTask<Void, Void, String> {
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
progressDialog = ProgressDialog.show(
nextclass.this, "","Sucessful", true);
/* progressDialog.setIndeterminate(true);
progressDialog.setIndeterminateDrawable(getResources()
.getDrawable(R.layout.customspinner));
*/
progressDialog = ProgressDialog.show(nextclass.this, "",
"Processing....", true);
progressDialog.getWindow().setLayout(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
}
protected void onPostExecute(String s) {
if (progressDialog.isShowing())
progressDialog.dismiss();
Intent my = new Intent(getApplicationContext(), CountTime.class);
startActivity(my);
}
#Override
protected String doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
Thread.sleep(2000);![custom spinner][2]
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
}

I Don't have Seen any Spinner in your Code. but Anyway you can use below code for making Custom Spinner.
Inside your Layout File:
<Spinnerandroid:id="#+id/spinnerview"
android:layout_width="180dp"
android:layout_height="42dp"
android:layout_marginLeft="105dp"
android:layout_marginTop="45dp"
android:background="#drawable/spinner_back"
android:paddingLeft="5dp"
android:spinnerMode="dropdown"android:visibility="visible" />
inside your String.xml :
<string-array name="spinner_array_environtment">
<item>Test</item>
<item>Production</item>
</string-array>
inside you Java File in OnCreate Method:
spinner_environment = (Spinner) findViewById(R.id.spinnerview);
adapter = ArrayAdapter.createFromResource(this,
R.array.spinner_array_environtment, R.layout.spinner);
adapter.setDropDownViewResource(R.layout.spinner);
spinner_environment.setAdapter(adapter);
Make new spinner.xml file to your layout folder :
inside spinner.xml file :
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/spinnerTarget"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="25dp"
android:textColor="#4C4646" />
Thats it!!!

Updating TextView from Async Task which use custom program dialog

In one of my app, I have a scenario where I need to do some background task. For doing that I am using Async Task. Also I am using custom progress dialog. Below is the layout of the custom progress dialog
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layout_root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_vertical|center_horizontal"
android:orientation="vertical" >
<ProgressBar
android:layout_width="60dp"
android:layout_height="60dp"
android:indeterminateDrawable="#drawable/progressloader"
android:layout_gravity="center"/>
<TextView
android:id="#+id/progressMessage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#color/black"
android:textSize="18sp"
android:text="Please wait...." />
</LinearLayout>
Everything works fine but when I try to set text to TextView then I am getting java NullPointerException.
AsyncTask code
private class InitialSetup extends AsyncTask<String, Integer, Long> {
ProgressDialog dialog = new ProgressDialog(getParent(),R.style.progressdialog);
#Override
protected void onPreExecute() {
dialog.show();
dialog.setContentView(R.layout.progressbar);
}
#Override
protected Long doInBackground(String... urls) {
// txtView.setText("Testing"); here I am getting the error
fetchDetails();
return 0;
}
#Override
protected void onPostExecute(Long result) {
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
populateUI(getApplicationContext());
}
}
MainActivity
public class SummaryActivity extends Activity {
final TextView txtView = (TextView)findbyid(R.id.progressMessage);
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.accountsummary);
new InitialSetup().execute("");
}
}

If I understand correctly, your TextView of which you want to set the text can be found in the xml file progressbar.xml (i.e. R.layout.progressbar). This TextView can be obtained once the content view has been set (using setContentView()). In your code you set it before this call is been and the code of mussharapp, he is calling it to early. Namely, he calls it after the setContentView(R.layout.accountsummary) call which does not contain the TextView. Consequently, the variable txtView will be NULL and you will get a NullPointerException.
What you should do is the following:
Set the variable txtView in onPreExecute, after setContentView is called.
Based on Paresh Mayani's explanation: Use the runOnUiThread method.
For the code look down below:
private class InitialSetup extends AsyncTask<String, Integer, Long> {
ProgressDialog dialog = new ProgressDialog(getParent(),R.style.progressdialog);
// The variable is moved here, we only need it here while displaying the
// progress dialog.
TextView txtView;
#Override
protected void onPreExecute() {
dialog.show();
dialog.setContentView(R.layout.progressbar);
// Set the variable txtView here, after setContentView on the dialog
// has been called! use dialog.findViewById().
txtView = dialog.findViewById(R.id.progressMessage);
}
#Override
protected Long doInBackground(String... urls) {
// Already suggested by Paresh Mayani:
// Use the runOnUiThread method.
// See his explanation.
runOnUiThread(new Runnable() {
#Override
public void run() {
txtView.setText("Testing");
}
});
fetchDetails();
return 0;
}
#Override
protected void onPostExecute(Long result) {
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
populateUI(getApplicationContext());
}
}

Yes, because you are trying to set the TextView inside the doInBackground() method, and this is not allowed,
Why not allowed? Because There is a only one Thread running which is UI Main Thread, and it doesn't allowed to update UI from thread process. read more info here: Painless Threading
So there is a solution if you want to set the TextView inside the doInBackground() method, do the UI updating operations inside the runOnUiThread method.
Otherwise, suggestion is to do all the UI display/update related operations inside the onPostExecute() method instead of doInBackground() method of your AsyncTask class.

(TextView)findViewByid(R.id.progressMessage);
should only be executed after the command setContentView().
TextView txtView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.accountsummary);
**txtView = (TextView)findbyid(R.id.progressMessage);**
new InitialSetup().execute("");
}
Also you can only change UI elements in the main UI thread. doInBackground() is not in the main UI thread. Make UI changes in onPostExecute
public class InitialSetup extends AsyncTask<String, Integer, Long> {
private Activity activity;
ProgressDialog progressDialog;
public InitialSetup(Activity activity) {
this.activity = activity;
}
#Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(activity);
progressDialog.setMessage("Starting task....");
progressDialog.show();
}
#Override
protected Long doInBackground(String... urls) {
// do something
//
return 0;
}
#Override
protected void onPostExecute(Long result) {
progressDialog.dismiss();
//Perform all UI changes here
**textView.setText("Text#2");**
}
}

The explanations are correct: You are not to make UI changes in any thread except the thread which create the UI. But AsyncTask has a method called
onProgressUpdate()
which always will run in the UI Thread. So based on the modifications by dennisg your code should look like this:
private class InitialSetup extends AsyncTask<String, String, Long> {
ProgressDialog dialog = new ProgressDialog(getParent(),R.style.progressdialog);
// The variable is moved here, we only need it here while displaying the
// progress dialog.
TextView txtView;
#Override
protected void onPreExecute() {
dialog.show();
dialog.setContentView(R.layout.progressbar);
// Set the variable txtView here, after setContentView on the dialog
// has been called! use dialog.findViewById().
txtView = dialog.findViewById(R.id.progressMessage);
}
#Override
protected Long doInBackground(String... urls) {
publishProgress("Testing");
fetchDetails();
return 0;
}
#Override
protected void onPostExecute(Long result) {
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
populateUI(getApplicationContext());
}
#Override
protected void onProgressUpdate(String... update) {
if (update.length > 0)
txtView.setText(update[0]);
}
}
Note that the type of the parameter of onProgressUpdate is the second type given in AsyncTask!
Extra: To make your code more robust you should check if the progress dialog still exists before setting the text.

notifyDataSetChanged not working in android

The list view is not updating data when the notifyDataChanged() method called.
In onCreate() method i initialized the the listview with no data.
ListView videoList = (ListView)findViewById(R.id.videos_list);
videoList.setOnItemClickListener(listener);
listAdapter = new PHVideosListAdapter(PHVideosActivity.this, videos);
videoList.setAdapter(listAdapter);
After this I started fetching list of video using new VideosCategoryFetchTask().execute();
in the post execute method I called
#Override
protected void onPostExecute(Boolean success) {
if(success) {
listAdapter.notifyDataSetChanged();
} else {
//show dialog
}
}
but nothing is displayed on the list. If anybody knew the solution please help...
private class VideosDetailsFetchTask extends AsyncTask<String, Void, Boolean> {
#Override
public void onPreExecute() {
super.onPreExecute();
}
#Override
protected Boolean doInBackground(String... params) {
Boolean success = false;
try {
if (params.length >= 0) {
videos = (Videos)videoAPI.videosForCategoryId(params[0],new VideosParser());
success = true;
}
} catch (Exception e) {
// TODO: handle exception
}
return success;
}
#Override
protected void onPostExecute(Boolean success) {
if(success) {
progressBar.setVisibility(View.INVISIBLE);
onFinishVideoFetch();
} else {
//show dialog
}
}
}
here using two Async classes sec one is called on the onPostExecute() of first one..
private void onFinishVideoFetch() {
if(videos != null) {
listAdapter.notifyDataSetChanged();
}
}
I 'm not fetching videos one by one.. here a list of videos is returned....
After getting the list of videos i wanted to refresh the list.
#Override
protected void onProgressUpdate(Videos... values) {
videos = values[0];
//add published object to list which holds
listAdapter.notifyDataSetChanged();
}
I tried this but no luck please help..
this is the adapter class used
public class PHVideosListAdapter extends BaseAdapter{
private Videos videoTitles;
private LayoutInflater inflater;
public PHVideosListAdapter(Context context, Videos videoTitles) {
inflater = LayoutInflater.from(context);
this.videoTitles = videoTitles;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
if(videoTitles != null) {
return videoTitles.size();
}
else {
return 0;
}
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return videoTitles.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
VideoListViewHolder holder = null;
if (convertView == null) {
holder = new VideoListViewHolder();
convertView = inflater.inflate(R.layout.videos_list, null);
holder.videoTitle = (TextView) convertView.findViewById(R.id.video_title);
holder.videoImage = (ImageView) convertView.findViewById(R.id.video_image);
holder.videoDuration = (TextView) convertView.findViewById(R.id.video_duration);
convertView.setTag(holder);
} else {
holder = (VideoListViewHolder)convertView.getTag();
}
holder.videoImage.setImageResource(R.drawable.icon);
holder.videoDuration.setText("00:10");
holder.videoTitle.setText(videoTitles.get(position).getVideoTitle());
return convertView;
}
private class VideoListViewHolder {
ImageView videoImage;
TextView videoTitle;
TextView videoDuration;
}
}

When you first create your PHVideosListAdapter, it is holding a reference to the Videos list that I assume is a member of your Activity. In your doInBackground method, the call to videoAPI.videosForCategoryId is updating the Videos reference in your Activity, but the adapter is still holding the original reference that was passed in to the constructor for PHVideosListAdapter. You need to either recreate the PHVideosListAdapter in onPostExecute or add a set method in PHVideosListAdapter to change the private variable videoTitles.
I ran into the same issue with using the ArrayAdapter provided by Google. You can only set the underlying List in the constructor, so you must recreate the ArrayAdapter or create your own class that allows changing of the underlying data for notifyDataSetChanged to work.

You need to override onProgressUpdate() of AsynTask class
Heres an example of AsyncTask assuming your list is videos which holds Objects of type Video and your extended adapter is VideosAdapter
private class VideosDetailsFetchTask extends AsyncTask<String, Video, Boolean> {
#Override
public void onPreExecute() {
super.onPreExecute();
}
#Override
protected Boolean doInBackground(String... params) {
//utilize string you are passing otherwise use Void as first generic param.
Boolean success = false;
try {
if (params.length >= 0) {
Videos videoFetched = (Videos)PrimeraHoraAPI.videosForCategoryId(params[0],new VideosParser());
success = true;
publishProgress(videoFetched);
}
} catch (Exception e) {
// TODO: handle exception
}
return success;
}
#Override
protected void onPostExecute(Boolean success) {
if(success) {
progressBar.setVisibility(View.INVISIBLE);
onFinishVideoFetch();
} else {
//show dialog
}
}
#Override
protected void onProgressUpdate(Video... values) {
videos.add(values[0]);//add published object to list which holds
((VideosAdapter)getListAdapter()).notifyDataSetChanged();
}
}

It's not very good descript anywhere but what you do when u call
listAdapter.notifyDataSetChanged();
u tell your machine "oke, your code is not legit" and now u stop! so basically ur machine has no clue what 2 do next! My solution is:
create a private void setupData()
private void setupData() {
ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>();
final List<Table_Follow> data = db.getAllData(); // from database
HashMap<String,String> item;
for(Table_Data td : data){
item = new HashMap<String,String>();
item.put("name1", td.getName_One());
item.put("name2", td.getName_Two());
item.put("date", td.getDate());
list.add(item);
};
my_data = new SimpleAdapter(this, list, R.layout.my_listview_row, new String[] { "name1","name2", "date" }, new int[] {R.id.lv_line_a, R.id.lv_line_b, R.id.lv_line_c});
listview.setAdapter(my_data);
}
I have a custom layout with 3 textviews (line a > title, line b > subtitle, line c > time see bottom page for xml). So basicly i ll use this private void to tell my machine what 2 do next by using setupData() after calling > notifydatasetchanged() in my main thread
my_data.notifyDataSetChanged();
setupData();
One last thing! I use the android listview id for my listview in my main xml file! Oh and if you have trouble using your 'onItemClickListener' (not giving u the right id, just text me! I faced that problem and solved it pretty shitty but it works :p)
My xml file for my listview:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/lv_line_c"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<LinearLayout
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/lv_line_a"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="24sp"
android:textStyle="bold" />
<TextView
android:id="#+id/lv_line_b"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:textSize="15sp" />
</LinearLayout>
</RelativeLayout>