Database Users

WebView - Handle JavaScript Pop Up ?

Hi,
I am new to Android Development. I am making an application with a WebView object. This loads a URL with some elements. However, I cannot get JavaScript PopUp to show up when the button is pressed.
My WebView has JavaScript enabled, but all other properties are disabled.
What is the property to enable WebView popups to show??

I had to do this. Override the onJSAlert() method in the WebChromeClient class:
Code:
public class MyWebChromeClient extends WebChromeClient {
@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result)
{
final JsResult finalRes = result;
new AlertDialog.Builder(view.getContext())
.setMessage(message)
.setPositiveButton(android.R.string.ok,
new AlertDialog.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which) {
finalRes.confirm();
}
})
.setCancelable(false)
.create()
.show();
return true;
}
}
Then add it to your webview:
Code:
MyWebChromeClient myWebChromeClient = new MyWebChromeClient();
webView.setWebChromeClient(myWebChromeClient);

Thanks. That did work!
One small thing, how do you set a Title for the pop-ups. Currently it shows the url in the Title.

I found a better example that sets the title:
http://lexandera.com/2009/01/adding-alert-support-to-a-webview/

footboydog said:
I found a better example that sets the title:
http://lexandera.com/2009/01/adding-alert-support-to-a-webview/
Click to expand...
Click to collapse
I tried that, but the Title is only displayed when the alert has one button/option. When there are multiple options, the Title shows the URL.

Sorry not sure how to fix that

footboydog said:
Sorry not sure how to fix that
Click to expand...
Click to collapse
Ok, I think I'll have to live with "file:///" showing as the Title for now...

you can convert to toast

[Q] DatePickerDialog cancelclick

Hi there!
I have been trying to catch the Cancel click of a DatePickerDialog, because I want to do some additional stuff, when the user clicks on the Cancel Button.
I tried it like described in the second answer from esilver from this Question:
http://stackoverflow.com/questions/...erner-of-datepicker-dialog?tab=active#tab-top
But I can't get it to work like that. When do I have to call this onClick method?
Would be great if someone could help me with that!
Thanks!

cTrox said:
Hi there!
I have been trying to catch the Cancel click of a DatePickerDialog, because I want to do some additional stuff, when the user clicks on the Cancel Button.
I tried it like described in the second answer from esilver from this Question:
http://stackoverflow.com/questions/...erner-of-datepicker-dialog?tab=active#tab-top
But I can't get it to work like that. When do I have to call this onClick method?
Would be great if someone could help me with that!
Thanks!
Click to expand...
Click to collapse
the "checked" solution in that example seems wrong to me. but the second one people voted up seems correct.
You can also set the onDissmissListener which will catch if the user backs out with the back key ( recommended for user friendliness )
have a look here:
http://developer.android.com/refere...id.content.DialogInterface.OnDismissListener)
Also, since DatePickerDialog is a subclass of AlertDialog, you can set the buttons the same way:
http://developer.android.com/guide/topics/ui/dialogs.html#AlertDialog
That should get you started but feel free to post back if you get stuck again. And post the code you are using.

Also, one other thing, it might be useful to keep a private reference to your dialog in your activity class.
All those examples (in the API docs and tutorials) always show a new dialog created when "onCreateDialog(int ID)" is called by the OS on your activity and they never save any sort of reference to it. They give you just enough code to hang yourself
Anyways, while this is a perfectly normal way to do things, it doesnt give you a chance to follow what is actually happening with the dialog. It also makes it harder to reference your dialog from elsewhere in the activity.
Keeping a reference, and exploring the onPrepareDialog(int ID) method are good for learning what the OS is doing with your dialog. (IMHO)
hth

Thanks a lot for your answers. But I still can't figure out how to do it.
Here's my current Code:
Code:
private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker datePicker, int year, int monthOfYear,
int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
// do some more stuff...
}
};
Code:
protected Dialog onCreateDialog(int id) {
Calendar cDate = Calendar.getInstance();
int cyear = cDate.get(Calendar.YEAR);
int cmonth = cDate.get(Calendar.MONTH);
int cday = cDate.get(Calendar.DAY_OF_MONTH);
switch(id){
case DATE_DIALOG_ID:
return new DatePickerDialog(this, mDateSetListener, cyear, cmonth, cday);
}
return null;
}
With that I can just call showDialog(DATE_DIALOG_ID); and I get the dialog. Now, where do I have to implement this OnDismissListener and how?
Thanks!

there are lots of ways to do this but I broke it out into several parts so hopefully it seems more obvious what is happening.
Code:
//here's our field reference we could use later or reuse or whatever
private DatePickerDialog dateDialog = null;
protected Dialog onCreateDialog(int id)
{
//your calendar code here... just removed to save space
switch(id)
{
case DATE_DIALOG_ID:
dateDialog = new DatePickerDialog(this, mDateSetListener, cyear, cmonth, cday);
dateDialog.setButton ( DialogInterface.BUTTON_NEGATIVE, android.R.string.cancel, cancelBtnListener );
dateDialog.setOnDismissListener ( listener );
break;
}
return dateDialog;
}
//our dismiss listener
protected DialogInterface.OnDismissListener dismissListener = new OnDismissListener( )
{
@Override
public void onDismiss ( DialogInterface dialog )
{
// do your thang here
}
};
//our click listener
protected DialogInterface.OnClickListener cancelBtnListener = new OnClickListener( )
{
@Override
public void onClick ( DialogInterface dialog, int which )
{
dialog.dismiss ( );
// since we dismiss here, the next listener to get called
// is the dismiss listener. now we'll have consistent behavoir
}
};

Ah thank you very much! I was always confused, where to set the Button and the OnDismissListener.
It works perfectly like that!

Help writing something with setOnItemClickListener

In my Android app, I have a sound that I want to play when a certain selection has been made from a spinner, but I want it to play the when the user actually makes the proper selection (or just after). My problem is that although the sound does play when they make the correct selection, as long as that selection stays chosen, it also plays every time the app starts up, when it should ONLY play at the time it's chosen. I think I need to change my setOnItemSelectedListener to setOnItemClickListener, but I'm not sure how (still pretty new to java). Can any generous soul out there show me how to change this up (assuming that's how to best solve this problem)?
Here is the code I have now:
Code:
fitnessSpinner = (Spinner) findViewById(R.id.fitness_spinner);
ArrayAdapter adapter4 = ArrayAdapter.createFromResource(
this, R.array.fitness_array, android.R.layout.simple_spinner_item);
adapter4.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
fitnessSpinner.setAdapter(adapter4);
fitnessSpinner.setOnItemSelectedListener(new OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long i) {
Log.d("test", "p: " + position + " " + i);
if(position == 0) {
//First Entry
MediaPlayer mp = MediaPlayer.create(mContext, R.raw.bowchica);
mp.start();
} if(position == 4) {
MediaPlayer mp = MediaPlayer.create(mContext, R.raw.debbie2);
mp.start();
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});

I haven't try the below code but you can try it on your own and tell us.
In onCreate() declare MediaPlayer mp;
In every if statement that you use for check insert this code:
Code:
if(mp!=null){mp.release();}
int resid = R.raw.yoursound;
mp = MediaPlayer.create(this, resid);
After that override the methods onPause() and onResume() and insert this:
if(mp!=null){mp.release();}
If it is still playing a sound when you start your app, then you should check your code again if you have set as default option any of your selection options.

I would LOVE to try this out...Unfortunately, I'm way too dumb at this point point ot figure out exactly where those code snippets would go inside of what I already have.
Does anyone have a couple of minutes to show me where it would go?

Below is a sample code. Since i don't know your code I give you a snippet that you should adjust it to your code.
Code:
public class SampleSound extends Activity{
private Spinner fitnessSpinner;
private MediaPlayer mp;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);//here goes your layout
setViews();//here you will set all your views(spinners buttons textviews etc..)
setAdapters();//set your adapters here
setListeners();//
}
private void setListeners() {
fitnessSpinner.setOnItemSelectedListener(new OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long i) {
Log.d("test", "p: " + position + " " + i);
if(position == 0) {
//First Entry
if(mp!=null){mp.release();}
int resid = R.raw.bowchica;
mp = MediaPlayer.create(this, resid);
mp.start();
} if(position == 4) {
if(mp!=null){mp.release();}
int resid = R.raw.debbie2;
mp = MediaPlayer.create(this, resid);
mp.start();
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
}
private void setAdapters() {
ArrayAdapter adapter4 = ArrayAdapter.createFromResource(this, R.array.fitness_array, android.R.layout.simple_spinner_item);
adapter4.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
fitnessSpinner.setAdapter(adapter4);
}
private void setViews() {
fitnessSpinner = (Spinner) findViewById(R.id.fitness_spinner);
}
public void onResume(){
super.onResume();
if(mp!=null){mp.release();}
}
public void onPause(){
super.onPause();
if(mp!=null){mp.release();}
}
}

I really appreciate the help. I put the code in my routine, but it still plays the sound every time the activity is loaded (as long as the selection in the spinner is correct). It should only play the sound when the correct selection is made.
Any other ideas?

I am sure that your Spinner is set to some value (since you have values to display). Because your Spinner points to a selection (doesn't matter if you have selected or it is selected by default) your sound plays (even when you start the app).
A way to stop the sound playing at start is to declare and an other Item like you did with the previous 4 and set it as default selection of your Spinner.
To sum up:
1.You have to append in R.array.fitness_array an Item (like you did with the previous Items) and give it a name.
2.At the end of method setAdapters() insert this:
Code:
fitnessSpiner.setSelection(5);// or whatever is your selection number
Now it should work but you should know that this is not a good practice and you should try make a ListView or something else.

I'd be happy to change this out to a listview, or whatever would work. I just have to give my user a choice of 4 or 5 items, from which they can choose only one. Something like a drop down box, but in Android, I thought my only option was a spinner. But whatever I use, I have to be able to play a sound when certain items are chosen, but ONLY when those items are chosen, NOT whenever the activity is called up.
Any specific ideas of what I might change to?

What if I had another control like a textview or an edittext (with it's visibility property set to false) that I programatically populated with the users selection (when it's the selection that I want) and then have an OnItemClcickListener set to play the sound?
Could that work?

I will answer from the last to the top of your questions.
1.You can do whatever you want with android. You want TextViews and EditTexts with complex and nested Layouts you can do it. Write services that will communicate with your contacts through a content provider? You can do it.
Write, read and test code. Only this way you will actually learn.
2.Read developer.android.com. Read the android tutorials from there and specifically the Notepad example. You will learn a lot.
A good resource with small examples for ListViews is this.
3.Have you tried the changes I told you from the last post? Did it worked?
Since you just started with android and programming you must first be happy if you have the expected result and then read more to make your code better

Your suggested changes (fitnessSpiner.setSelection(5);// or whatever is your selection number) would stop the sound from playing, but defeat the apps purpose. Every time this activity is loaded, the spinners hit preferences to load the previously stored data. So if I force the spinner to a different selection to NOT play sound when the activity loads, then I would be displaying the wrong data for the user.

Yes you are right. So it is better to make a ListActivity. Read developer.android.com and the link i gave you before. You will be ok with this!

You're using "setOnItemSelectedListener", which sounds like when the app starts, its getting "selected" again.
Have you tried using "setOnItemClickListener" instead?
fitnessSpinner.setOnItemClickListener(new AdapterView.OnItemClickListener () {
public void onItemClicked() {}
};

Lakers16 said:
You're using "setOnItemSelectedListener", which sounds like when the app starts, its getting "selected" again.
Have you tried using "setOnItemClickListener" instead?
fitnessSpinner.setOnItemClickListener(new AdapterView.OnItemClickListener () {
public void onItemClicked() {}
};
Click to expand...
Click to collapse
onClickListener doesn't work for the spinner...I wish it did.
I REALLY need the drop down functionality of teh spinner, so I guess I'm going to try and figure out a way to have an invisible edittext that I set to the spinner selection and then use onClickListener or onChange...

[Q]Content Provider - Huge Data

Hi,
Im using a content provider to query data, the following code was working good until I test it in another device(low end) with a larger data(~3000). With a larger data app became unusable, what can I do for improve this?
Code:
public void ContentSearch(String uriS,String id)
{
Uri uri = Uri.parse(uriS);
Cursor cur = getContentResolver().query(uri, NULL,
"_id = " + id, null, null);
cur.moveToFirst();
do {
//Do Things
} while (cur.moveToNext());
cur.close();
}

try to put it in a thread:
Code:
new Thread(new Runnable() {
[user=439709]@override[/user]
public void run() {
//CODE GOES HERE
}
}).start();
You do this for anything that might take the system a long time to execute and isn't directly needed for the UI.
If it is needed by the UI try an AsyncTask:
Code:
AsyncTask<Params,Progress,Result>() {
[user=439709]@override[/user]
protected Result doInBackground(Params params) {
}
protected void onProgressUpdate(Progress progress) {
}
protected void onPostExecute(Result result) {
}
}.execute();
I never used Content Providers so I'm not sure what you would put in for each thing on the Async but here is the Android Docs perhaps you can figure it out

Im filling an array to inflate in listview, my approach is load 25 items then break, and when the list reaches the end load more 25 and so on, but it seems that the cursor is in the same overloaded.
I need it for the UI so I dont have sure if the thread solve the problem, but I will try it anyway.

avlisF said:
Im filling an array to inflate in listview, my approach is load 25 items then break, and when the list reaches the end load more 25 and so on, but it seems that the cursor is in the same overloaded.
I need it for the UI so I dont have sure if the thread solve the problem, but I will try it anyway.
Click to expand...
Click to collapse
You fill the array then you fill the list? This might be what's causing our crash as the list is trying to setup before the array is done.
You could just use the async to do the lookup and set the list item info in the list adapter and as the async finishes each lookup it will enter each item in the list
Sent from my Nexus 7 using XDA Premium HD app

Dynamically refresh ListView with CursorAdapter

Hi everyone,
First of all, I'd like to apologize if I'm posting this in a wrong place... This is my first post, I'm still getting familiar with this forum.
I would also like to apologize for the lengthy post.
The title, to a certain extent, reflects what my problem is, but to clarify:
I'm learning Android, so I'm making a simple SMS app for practice.
In it, I have a database which has tables for sent messages, received messages and contacts. I have 3 separate activities (which do NOT extend ListActivity) which show lists for sent messages, received messages and contacts, respectively. The lists are populated through CursorAdapter.
Let's consider the activity for contacts...
In it I have list (ListView) which displays contacts (each list element displays name and phone number). Below the list I have a "Add Contact" button. When I click the button a dialog pops up and shows the form for adding new contact. The buttons in the dialog preform all the database operations.
Similarly, when I click some item in the ListView, another dialog pops up. That dialog has buttons for "Send SMS", "Edit" and "Delete" contact. Again, the buttons do all the work with the database.
The trouble:
My trouble is... When I add a new contact, or delete one (after both operations their dialogs dismiss), the ListView is not refreshed.
In order to see the refreshed list I need to close the activity and start it again.
I googled and googled this for 3 days now, and all the answers I found say that I need to call
Code:
adapter.notifyDataSetChanged
and
Code:
adapter.changeCursor
but that doesn't do the trick.
I'll now post the relevant code with the two methods mentioned above. I placed them where i thought they should be, but this doesn't work.
So, I humbly beg someone to guide me through this ordeal.
Many thanks in advanced!
Here comes the code:
The Adapter:
Code:
public class AdapterContactListView extends CursorAdapter {
private MyDatabaseHelper mdbh;
private LayoutInflater myLayoutInflater;
public AdapterContactListView(Context context, Cursor c, int flags) {
super(context, c, flags);
mdbh = MyDatabaseHelper.getMyDatabaseHelper(context);
myLayoutInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
// TODO Auto-generated method stub
TextView fullNameTV = (TextView)view.findViewById(R.id.contactElementNameTV);
TextView phoneNumberTV = (TextView)view.findViewById(R.id.contactElementNumberTV);
String fullName = cursor.getString(cursor.getColumnIndex(mdbh.getContactFirstName()));
fullName = fullName.concat(" ");
fullName = fullName.concat(cursor.getString(cursor.getColumnIndex(mdbh.getContactLastName())));
String phoneNumber = cursor.getString(cursor.getColumnIndex(mdbh.getContactPhoneNumber()));
fullNameTV.setText(fullName);
phoneNumberTV.setText(phoneNumber);
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
// TODO Auto-generated method stub
return myLayoutInflater.inflate(R.layout.contact_element, parent, false);
}
}
And the Activity:
Code:
public class ContactsActivity extends Activity {
private MyUtilities myUtilities;
private MyDatabaseHelper mdbh;
private AdapterContactListView contactsAdapter;
private ListView contactsListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_contacts);
mdbh = MyDatabaseHelper.getMyDatabaseHelper(this);
myUtilities = new MyUtilities(this);
contactsAdapter = new AdapterContactListView(this,mdbh.getContactsCursor(),CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
contactsListView = (ListView)findViewById(R.id.contactActivityLV);
contactsListView.setAdapter(contactsAdapter);
contactsListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
TextView phoneNumberTV = (TextView)view.findViewById(R.id.contactElementNumberTV);
String phoneNumber = phoneNumberTV.getText().toString();
Contact contact = mdbh.getContactFromPhoneNumber(phoneNumber);
Dialog d = myUtilities.createSelectedContactOptionsDialog(contact);
d.show();
contactsAdapter.changeCursor(mdbh.getContactsCursor());
contactsAdapter.notifyDataSetChanged();
}
});
}
public void addContact(View view) {
Dialog d = myUtilities.createAddContactDialog();
d.show();
contactsAdapter.changeCursor(mdbh.getContactsCursor());
contactsAdapter.notifyDataSetChanged();
}
}

djolec987 said:
Hi everyone,
Click to expand...
Click to collapse
Well notifyDatasetChanged only informs the adapter that the backing interface has new data... but your backing it with a cursor... so in your case it would just cause getView/bindView to be called for all current visible items, thus fire a query at the cursor. I think the cursor will cache the data so it's really a reload on the cursor data and then an adapter notify call you want... If you use loader (depending on target api version) then it should do most of this for you. As it stands if you want to do it manually make sure the cursor is a new cursor of the database that has changed.
(typed in a rush)