Android :: BaseAdapter Class Used With Json Parsing

Oct 12, 2010

I have Parsed the Json Response and Now I want to use the BaseAdapter Class in my Application. I have a rough Idea about the BaseAdapter Class but not very clear about the same. what exactly the Base Class does.

Also do I need to use the Getter and Setter Methods if I am using the BaseAdapter Class in my Application?

Android :: BaseAdapter Class used with Json Parsing


Android :: Com.google.gson.JsonParseException - Failed Parsing JSON Source - Java.io.BufferedReader To Json

Jul 29, 2010

I am trying to parse a json object using gson in Android application ,the test passed quite gracefully in emulator ,while i used the actual device ,the problems started.
I am getting the exception as follows.

CODE:...................

I am using gson 1.4 version.The code i use is:

CODE:..............

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Android :: JSON Deserializing With Json Parsing In Droid App / What It Means?

Sep 24, 2010

What is "deserializing Json" means, I had seen this term on the Web. I don't know the meaning od this particular term So, it would be great if anybody can explain me about What it means actually?

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Android :: For Google About BaseAdapter Class

Nov 19, 2009

For Google about BaseAdapter class

In Android 1.6 and 2.0 the BaseAdapter class has apparently been modified to throw an exception when it sees the Adapter.getCount() method return a number different than what it picked up when BaseAdapter.notifyDataSetChanged() was called (at least I did not observe this behavior in pre 1.6).

So now the question is, when should one call notifyDataSetChanged() or more importantly, when can the count in the Adapter be safely changed?

Consider the case of an app with a background thread delivering data to a BaseAdapter at a rate faster than the ListView responds to notifyDataSetChanged(). Because notifyDataSetChanged() is a synchronous call and the ListView updates are taking place sometime in the indeterminate future on the UI thread, how can an app know when it is safe to change the adapter count?

If the app changes the count while the ListView is updating itself the exception will be thrown (and there is no way to catch the exception).

Is there a way to know when it is safe to change the count in the BaseAdapter?

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Android :: Parsing JSON In Java

Oct 8, 2009

I'm trying to parse JSON in android but am having trouble with accessing sub children of an object. I am trying to extract augment from the following. Code...

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Android :: Parsing The Json Data ?

Oct 7, 2010

Here I am posting my Json Response below:

CODE:.......

Now I want to have the following data Parsed "Phone", "Distance", "City", "Title", "State" and only "AverageRating" from the Tag "Rating".

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Android :: Sending And Parsing JSON ?

May 12, 2010

In the application I am developing, I would like to send messages in the form of JSON objects to a Django Server and parse the JSON response from the server and populate a custom listview.

From the little JSON knowledge I have, I thought this format for the response from server

CODE:...

How much knowledge of JSON should I have to accomplish this purpose? Also it would be great if someone could provide me links of some tutorials for sending and parsing JSON Objects.

Is there any advantage using GSON Parser rather than 'get' command for parsing JSON responses?

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Android :: Facebook Json Parsing ?

Oct 29, 2010

How to parse following json return from facebook.i tried my self by searching on net But i failed.

CODE:.............

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Android :: Parsing JSON - How And When To Use Iterators

Oct 9, 2010

I have this JSON to parse.

CODE:....

I would like to know how can I get the first value artist1 and then the second one artist2

This is what I am doing :

CODE:....

I got java.lang.classCastException for this JSONObject tmp = rowIt.next();

So there are my two questions: Do I need to use iterators in this case ? How do one should use them ?

Should the JSON looks like this ?

CODE:....................................

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Android :: Push Notification And Xml/json Parsing

Aug 7, 2010

What is push notification and xml/json parsing?

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Android :: Error Parsing JSON Data

Oct 12, 2010

If I run my php file manually I am getting the output as follows:

CODE:.....

The php code is as follows:

CODE:...................

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Android :: Parsing A JSON Response From A .Net Webservice

Apr 21, 2010

Just to get this out in the open I am new to JAVA, KSOAP, and JSON. So I'll try to explain this the best I can.

A while ago I created a webservice to be consumed by Blackberry Apps that we're built using the plug in for Visual Studio. Now the project I am working on, I want to consume the same webservice for Android devices. For the most part I have the base code for the Android app done and working. Here's my problem:

I can successfully call the webservice and get a response. I know from creating the webservice that it sends a JSON response. My problem is trying to parse through the JSON response. I have found a few examples that I have been suiting to my needs however I am hung up on one thing.

In the JSON each element is preceeded by "anyType" which is forcing my code to return no results (Ultimately I am binding the data to an ArrayList) Here's what I get if I "getProperty(0).toString()...anyType{Artist=anyType{TrackName=Champagne Supernova;};


Here is the code I am using to parse the JSON Object....

CODE:..........

WebService Code:

CODE:.....

Sample of XML Output from a browser:

CODE:......

I have a feeling I will need to implement a Class, and Getters/Setters on the Android side. I'm just not sure how to go about doing that.

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Android :: Parsing The Data In JSON Response

Sep 30, 2010

Here I am posting the Json Response:

CODE:......

Now I just want to parse the data

CODE:......

From the Category Tag. I am able to parse from the Result Tag.

Here is my code :

CODE:..................

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Android :: Example For Parsing Json In Droid With A Detailed Description?

Aug 16, 2010

Can anyone send me link which has an example for parsing json in android with a detailed description?

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Android :: Parsing YQL JSON In Java - Android

Aug 31, 2010

Here is the JSON result:

CODE:...................

UPDATE: And here is my code (assume buildQuery and RestClient are valid):

CODE:...................

I get the following Exception on JSONArray quotes = query.getJSONArray("results");:

org.json.JSONException: Value {"quote": ...

The value of "quote" is printed in the debugger.

How can I parse this correctly?

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Android :: Parsing XML And Initializing Static Variables Of Some Class

Dec 21, 2009

I have an application that is driven by a configuration XML: various app properties are loaded at the app start-time by parsing the XML and initializing static variables of some class. The data read from this XML drives different Activities of the application. Presently, I have called the "parsing and the properties-initialization" from the onCreate() of my Main Activity. I have a few questions as regards this case/approach: Should I invoke the app initialization method from the Application Object or is the current approach correct?

What advantages/disadvantages do/would we get/have if I choose to invoke it from the Application object? Do we really need a static class to store app properties? Or can we have all the properties as a static Collection variable in the application object? Parsing a XML(~200 nodes) at app load time might take some time (not sure how long tho); How can I avoid the dreaded ANRs? I am using a Pull Parser.

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Android :: How Does BaseAdapter Communicate With Its ListView?

Sep 6, 2009

How does BaseAdapter communicate with its ListView? I was wondering how the BaseAdapter.notifyDataSetChanged() method notifies the attached View that the underlying data has been changed and it should refresh itself? When creating a BaseAdapter you attach it to the View with.So the ListView then knows it's adapter to get list elements. But you never tell the BaseAdapter what ListView it is attached to. So when you call BaseAdapter.notifyDataSetChanged() how does it reach the View to tell it to refresh itself?

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Android : Can I Scroll Position In BaseAdapter?

Mar 9, 2010

I am using BaseAdapter for displaying the list. This list is fetched by calling a Web Service. At a time only 20 records are returned. Now, when the scroll of the BaseAdapter reaches the last record then the application should fetch more records from the server.

So, what I want to know is how to know the scroll position or some other way of knowing that the last record has been reached so fetch more records from the server. I don't want to implement the next and previous button on the screen.and so am trying to implement it in this manner.

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Android :: Finish Activity From Custom BaseAdapter

Nov 22, 2010

In my android application I have custom listview with an image and textview. In extended BaseAdapter under getView method click events of textview and image are associated with onClick method using setOnClickListener as shown in code below

CODE:.............

And

CODE:...................

When clicking on image it acutally deletes that entry from List which works fine, but on clicking textview i would like to return the text of clicked textview to main activity but I am unable to achieve this, although I can do this from setOnItemClickListener of this custom listview acitivity.

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Android : Different Types Of View In ListActivity / BaseAdapter?

Feb 22, 2009

In a list, is it possible to have different kind of views, inflated from different layout XML?

I started with the sample in the API Demo, using the Efficient Adapter, and it starts like this Code...

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Android :: BaseAdapter Doesn't Return Position Correctly?

Dec 17, 2009

I custom the BaseAdapter to show image array with full-screen mode. I want the user can flick the images so I use the gallery class.When a image displays on the screen, a correlative sentence should be showed as well. The issue is the position param in getView function jump abnormally, especially when I flick into more one picture at a time. Therefore the string is showed incorrectly, I don't know why the image still displays normally. Here is my code...

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Android :: Default Number Of Views Constructed For A BaseAdapter?

Jun 26, 2009

I've tried to describe this problem a few times, but I'll try again.I have a thread (not spawned from the adapter) which updates items in a List that a BaseAdapter child uses to populate its view. I am not adding things in the List from the thread, just modifying content. In any case, I have 6 rows visible at first on the screen. The thread pulls data from the network and updates them in 0, 1, 2, 3, 4, 5 order. However, when 0 is updated, 5 mirrors its data on the screen briefly, then 1 is updated, 4 mirrors it, 3 is updated, then 4 is reloaded correctly, then 5, then 6. I am using the view holder/ convertView pattern correctly, as far as I can tell.How many views are created by default for an adapter? My guess is 3 based on what I see. Then, when getView() gets to index 4, 5, or 6, it correctly creates more Views and populates the right data. Anyone ever seen anything like this?

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Android :: BaseAdapter Don't Hide Layout With SetVisibility - View.GONE

Jul 29, 2010

I have a little problem. I have class

CODE:..............

When I do that, method convertView.setBackgroundColor(Color.RED) work great, what I need Image is there:
dl.dropbox.com/u/866867/stack/device2.png

But when I want to remove that item, I can't do it. I add there convertView.setVisibility(View.GONE); , but have empty item, beside hide it. I read that parameter View.INVISIBLE won't hide layout, but View.GONE have, but in my code, doesn't.

And that image: http://dl.dropbox.com/u/866867/stack/device.png

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Android :: Custom BaseAdapter - Dynamic Updates - Crash In ListView Layout

Feb 16, 2010

I'm trying to get my first Android app stable enough for the marketplace, and I've hit a brick wall with one exception that I don't understand. Probably I'm doing something stupid, but I can't tell what, and after several hours googling and experimenting, I thought I'd see if I can get some help. My Activity extends ListActivity, and the parts I think are most important are extracted below:

GroupedListAdapter is a simple class that extends BasedAdapter to provide headings for sections of the list (not unlike the Fancy ListView tutorials that are floating around).

I create this in onCreate, and it works fine. Inside onListItemClick, I do some actions which will create a different set of list contents. I "clear" the adapter, which empties the contents, and call reload, which repopulates it. Then I call notifyDataSetChanged.

Most often, this seems to work, but also fairly often, I get the exception following the code snippets below - this seems to indicate the ListView is not in sync with my changes. Lately this crash happens 100% of the time under the simulator.

CODE:.........................

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Android :: Custom ListAdapter Extending BaseAdapter Crashes On Application Launch

Mar 23, 2010

Data being pulled from a local DB, then mapped using a cursor. Custom Adapter displays data similar to a ListView. As items are added/deleted from the DB, the adapter is supposed to refresh. The solution attempted below crashes the application at launch.

CODE:................

Errors:

CODE:.........................

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Android :: Invoke GetView Method In BaseAdapter In Droid From Another WebService Bean?

Mar 19, 2010

How to invoke the getView method in the baseAdapter in Android from another WebService Bean?

The adapter in my code as follows, I extends the base adapter code...

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Android :: Creating A New Class Using Eclipse New Java Class Dialog Box

Jul 7, 2010

I'm creating a new class, using eclipse "New Java Class" dialog box. I can write the superclass I want (I can't find using "browse" button), but I can't write or select an interface to implement. I click "add" but ther is nothing to select. What I'm doing wrong?

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Android :: Communicating Between Receiver Class And An Activity Class

Jul 14, 2010

I'm just getting into Android development, and I have a question about communicating between a receiver class and an activity class. I'm very new to JAVA and Android so I hope I don't sound too stupid. I'm developing an application where I intercept an SMS message and then based on various elements of that SMS I might delete it once it's been saved to the inbox. I have a receiver class that intercepts the txt message, and I am also able to delete messages from my inbox with code in the activity class using a button at the moment. The problem I have is communicating between the receiver class and the activity class where the code to delete a message resides. I tried putting that code directly into the receiver class but as I'm sure most of you already know the BroadcastReceiver class doesn't seem to support what I need to delete messages. I've been searching for an answer to this for a while, but haven't been able to find anything. Honestly I'm not sure I know enough about JAVA and Android to even recognize a solution if I saw it.

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Android :: Accessing Class Level Stuff From Inner Class

Jun 27, 2010

What I want to do, is be able to access the object neoApi inside the Neoseeker class, from its inner class RunningTimer. Now, in my code, you can see what I would think to work, but when I run my application, nothing pops up. Nothing inside my TextView, no Toast, nothing at all. How can I remedy this?

package com.neoseeker.android.app;
import java.util.Timer;
import java.util.TimerTask;
import org.json.JSONObject;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;.......................

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Android :: Access Application Class From Class Other Then Activity

Sep 8, 2010

I'm new to Java and android development. In my application I need data which is accessible for a few activities. I've read that a good solution is to use Application class for this. So I use it like this:

public class MyApplication extends Application {
private String str;
public String getStr(){
return str;
}
public void setStr(String s){
str = s;
}
}

and I can access this variable from activity like this:........................................

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