and yeah u guessed it right, it rendered fully after calling that method. So i guess by default javascript is disabled on webview. Phew.

Gracias.

While working on android project i got myself into a situation where i had to start an activity from non-activity class (a class that doesn’t extend Activity), and i had no other option that time. So lets say there is a class called DummyClass having a dummyMethod() and i had to start an activity called MeActivity, so i wrote this to start an activity, a rough pseudocode:

Well as i had my doubts earlier above code is a garbage cuz there is no startActivity() method in my dummyclass. So i did something which worked for me. I declared a public static Context reference variable in MeActivity class and in its constructor i assigned its instance to variable. Here is the code that will look like:

So that was it. Now i used this context variable to start my activity from non-activity class.

well that worked for me, hope it works for you too.

Gracias.

Now for second issue that i faced, i had a AutoCompleteTextView on my one application activity so whenever that activity takes screen a soft keyboard appears with focus on autocomplete obviously. This thing didn’t happened with EditText. But whenever i had autocompletetextview soft keyboard appears automatically. I didn’t wanted this. Instead i wanted soft keyboard to appear only when i touch AutoCompleteTextView. But i found a simple solution for this:

yeah just add android:windowSoftInputMode=”stateAlwaysHidden” attribute to activity tag, so whenever my activity takes screen keyboard will not show up until i touch any editable view. This has worked for me till now, so you can give it a try.

Gracias

1) PHP

I somehow looking at google i wrote this code. This php gets the input text from my android and it runs query at database for records whose company names has “input text” as a substring. You can see the query statement above. In the end it encodes the result in json.

2) Main.xml (my layout)
Here is the xml layout file for my ui.

3) Main Activity class
Here is the main class that extends Activity. Here is the code of calling php module and parsing json. I have explained this all in my previous post so you could go through it. i’l explain just AutoCompleteTextView part here.

Note: remember “http://10.0.2.2/” in my last post. I had to use 10.0.2.2 instead of localhost because emulator consider itself as localhost and my xammp local server is not in emulator localhost.

Ok so i want to detect an event when a text is typed/deleted from my autocompletetextview, basically i want a listener which detects a change in text of my view. So what should we do ? Well in my case i searched the android developer documentation , there i found something called TextWatcher. What i am doing is attach a TextWatcher object to editable like my AutoCompleteTextView so whenever any text changes in my editable the functions/methods of TextWatcher will be called and in these methods i had to write my logic codes which is what i want to achieve if text changes in autocompletetextview ?. There are three abstract methods in TextWatcher class so you have to override them, well anyway thats what we wanted. Methods are:

afterTextChanged(Editable s)
beforeTextChanged(CharSequence c, int start, int count, int after)
onTextChanged(CharSequence c, int start, int before, int count)

Best way to understand them is going through the document here. Anyway i had to write my logic code on beforeTextChanged() method so that it performs action whenever there is a change in text of autocompletetextview.

In above code sample i am calling PHP whenever i am typing something. So i am calling callPHP function at onTextChanged() method. So whenever i type something it will call PHP giving text to the function in PHP and PHP will query MySql database for results and PHP will send results to me in json. This is it. So i decode json and fill the results in ArrayAdapter after clearing it, whenever ArrayAdapter changes it notify the changes being made and AutoCompleteView will show the new drop down suggestions.

There was still one very minor problem and i solved it with my another very stupid solution So problem was that whenever the results from database gets filled in ArrayAdapter and AutoCompleteTextView shows drop down suggestions, it showed me filtered suggestions like suppose i type “can” and i get results(which has “can” as substring) from database, so for “can” ArrayAdapter contents get filtered and i get suggestion starting with text “can” which i didn’t wanted because i already has got filtered results from database and i wanted to show all results that i am receiving from database. So for this i had to write my custom AutoCompleteTextView. It isn’t hard at all, i just had to extend AutoCompleteTextView and override the methods.

4) CustomAutoCompleteView which extends AutoCompletetextView

How to remove the filter on an ArrayAdapter used in an AutoCompleteTextView? I had to override performFiltering() method. In this method i am telling AutoCompletetextView to not filter any suggestions, just show all suggestions. I searched on google for this topic but i didn’t find any good solution, maybe i didn’t searched it properly. Whatever, i just wrote a stupid trick to remove any filter, actually instead of technically removing filter i am adding a filter which does a job to show all suggestions . I defined a filter which filters all suggestion based on “” yeah a blank string . But this works like a charm. Just try it.

So now your are getting results suggestion from database dynamically to AutoCompleteTextView.

But But But But But ok enough, In above code way of fetching data from database to AutoCompletetextView just sucks. Never never ever call a http PHP call in UI Thread. I did a lot of testing with this code. When i was getting small number of results from Database(live database not local) it was working fine but when i was getting large number of results say more than 150 and it was taking a bit of time which caused my UI to be non-responsive and thus famous FORCE CLOSE occured. So never call it from UI thread because u don’t know how much time it will take to complete whole http connection. So always call it in separate thread that i will discuss in Part II of this subject. yes i’l be posting new better version of same problem.

Gracias

Well i have created two combobox on my fla. I have given instance name to them and then i am just taking the language input for translating text from one language to other.

The main crucial part:

‘http://ajax.googleapis.com/ajax/services/language/translate’+'?v=2.0′+’&q=’+escape(my_input)+’&langpair=’+'es’+'%7C’+'en’

I am just making a GET HTTP Call to google translate API passing input, and language pair (i.e en(english) to es(espanol) etc). It returns result in JSON. On my flash client i decode that JSON and display the translated result.
Note: escape method is used to encode the string to url encoded format

Here is the source code:

Well there is nothing much in code. Just taking the language values from two combo box list and passing it to the translate api. Then after decoding json that i received from api call, i am displaying on textfield. Anyway please note that translate api has been officialy depracated.

Here is the quote from API site:

Important: The Google Translate API has been officially deprecated as of May 26, 2011. Due to the substantial economic burden caused by extensive abuse, the number of requests you may make per day will be limited and the API will be shut off completely on December 1, 2011. For website translations, we encourage you to use the Google Translate Element.

Gracias.

I create a php file, which makes a database connection and makes a query and encodes a result. As i told before i am not familiar to PHP so i wrote this code looking here and there by googling it . Code looks like this:

Well code is not that hard to understand. You are making a mysql connection by providing credentials. Then you select a databse. Then you execute a query and result is assigned to $q. Next what i seen is that result is in ArrayCollection type (i saw it in xampp console) so i think we are converting it into Array while iterating through collection(I am not quite sure so if u know then please share). Then You are just encoding the result into JSON.

Now lets see how we will decode the JSON at our android program. Code looks like this:

I faced two problems/exception while connecting to php. PHP was connecting to mysql perfectly as when i run in browser it printed results so there was some issues on my above code which i’l address here and this is common problems which will be faced by every newcomer to android like me . Before that i’l just explain my php file and localhost path setup. When i installed xampp, in xampp folder there must be folder called htDocs so i have to make a project folder here inside htDocs and inside this project folder will be my php. So my php path would look like this “/htDocs/game_php_testing/android_database.php” So when i will make a call to php via “http://localhost/game_php_testing/android_database.php”

Now i will address the two problems that i faced.
First,

java.net.socketexception -permission denied

yes whenever i was trying to call my php i was getting this exception. How did i solved it ??? Well i just provided a permission to internet access at AndroidManifest.xml file. You have to put this permission above tag

Now second Problem, this one is very important.

java.net.ConnectException -Connection Refused.

Well what i found is that when u call localhost android thinks that u r calling to android emulator itself not the localhost machine. So localhost/127.0.0.1 wouldn’t work. So i found the solution to that: instead of localhost use 10.0.2.2, code will be like this:

Well problem solved . Now i decode the json that i got from php. I am printing the result on LOG. Please see that when i am calling “json_data.getString(“Player_name”)“, Player_name is a column/attribute in my database table and its type is varchar so i used getString() on it.

I hope this post helped you as you may also faced similar problem at first time.

Gracias.

Gracias

What i generally do is create a custom class which would represent particular box2d body, for example in pool game i would create a class called Ball. So now i would create a method called getDestructionStatus() which tells me if particular body is eligible for destruction. And second method i would define called destroy(), in destroy() method you can write your cleanup() implementation like if u have some movieclip associated then you can remove it from stage [Note: I didn't call DestroyBody in destroy() because it didn't work for me] Something like this :

Now how would u implement ? Well lets say if my ball collides with wall then i want to destroy the ball, so code would look like this:

Above i am using a custom class that extends b2ContactListener class and i am overriding BeginContact to determine the collision and provide my some custom implementation response. Here is a insight on b2ContactListener tutorial from Allan Bishop.

Now when my ball collides with wall then i call destroy method on it, which runs my custom cleanup and set the destructionState to true. Now i will check for this destructionState and call DestroyMethod, calling DestroyBody in correct context and block matters because as i said if some reference is still pointing to body then it won’t get detroyed. Here is the implementation code:

Now comes the main part:
I want to explicitly point out that i have put DestroyBody call inside the world body list iteration because it always worked for me without any issues, my bodies got destroyed and that was what i wanted. I hope it works for you also. I also want to try other techniques, so if you apply other way to destroy objects then please share with us. It would help me and others a lot xD

Gracias

But in this post i am not discussing the tutorial to use LoaderMax or its features. As always i faced a certain problem and i solved it xD. So i wrote a code module including LoaderMax which ran flawlessly on all web browsers (internet explorer, chrome, opera, and safari) but it didn’t run on Mozilla Firefox. When running on Firefox an exception error was getting thrown and i spent 1 hour to find the reason and couldn’t find it and got me pissed me off xD. First let me show you the code module that i wrote and was throwing exception on firefox:

here is the screenshot of error:

In first statement of function completeHandler i am retrieving loaded image. I am sending it to my resize algorithm later to resize the original image to fit into my target area. But it throws error on firefox because it says invalid bitmapdata. My resize algorithm takes displayobject as parameter and ContentDisplay extends Sprite class. Note: LoaderMax can also resize your original image according to aspect ratio

I didn’t understand why this error was coming in firefox but not in other browsers. At first i thought maybe my algorithm was having issues with type ContentDisplay so i re-wrote my completeHandler function as follows:

The above new statement gives me bitmap. Now i run my module and guess what ? yay yepee it didn’t run on firefox but ran on other browsers xD and this time i got null exception, yeah above statement returned null, weird rite ?? I was frustrated and cussing firefox xD. But accidently while doing just trial and error i added few parameters and viola boom bang dang it got running on firefox and all browsers xD. here is the new change that i made :

well if u have noticed, i have added new parameter called “estimatedBytes”. Yes, just this parameter solved above problem and again i was left scratching my head heheheh xD.

Gracias.

Lets say i have attached a mouse listener to plane to which moviematerial is mapped. So when i click plane i want to do/manipulate the movieclip that is mapped to plane via moviematerial so code would look something like this:

the above snippet works, i mean u can access the movieclip on above do the later changes to it if u want.

But lets say there is no listener attached to the plane but later in program cycle i want to modify the movieclip attached to plane like applying blurr filter to it. Then i would do something like this:

Well the above code didn’t work for me. In previous above event handler i traced event.target and it traced plane object, so it seems like ‘.material’ returned MaterialObject3D so i have to first downcast it to MovieMaterial separately and then try to access movie property on it. Here is the error:

So here is how is the stupid solution

So that worked. But still i didn’t had to do that inside my event handler when i was accessing via even.target, maybe i am missing something out. Right now i am going through docs of papervision.

Gracias