Android :: Download Multiple Objects From Same Server
May 5, 2010
How can I utilize Connection: Keep-Alive option, re-use connection and download multiple objects from the same server? HTTP connection consists of opening a socket, sending request and then readign response. For Keep-Alive option open the socket connection needs to be done only once. However I could not find in Android Java classes how this can be accomplished. URL.openConnection returns new instance of HttpURLConnection implementation for every request so HttpURLConnection cannot be cashed for reusing on multiple requests to the same server, URL object is also new for each request and also cannot be reused.
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Sep 23, 2009
I have a Tomcat Server in front of a Servlet that gets/stores information in a MySQL Database. My Android application needs to get/ put information on to this server. I control both ends of the communication, so I've basically been exploring the "best" way to send information back and forth. So far, I've tried Jackson for JSON and the native Java Serialization packages. My object is relatively complex and completely serializable.I have no desire to write a "custom" guy at all, as I doubt I'd actually be able to improve on most of the packages.So with that being said, are there any other strategies/packages I should try to get information to/from my server?
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Oct 29, 2010
i need to parse this response in android using the android json parser but the thing i cant find the answer to anywhere is: how do i parse the data if for example "itineraries" can contain one or sometimes more objects of the type itinerary? if it contains one than it is returned like this but if it contains more it is returned with [] with this example "itinerary" cannot be placed into a JsonArray becouse obviously it is not an array. (not placed in [] right?)
how do i parse this? any examples?
{
"plan":{
"date":"2010-10-20T00:00:00+02:00",
"from":{
"name":"Булевар Партизански Одреди",................
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Sep 26, 2010
I would like to make a game out of many cubes and am planning on putting it on mobile platforms and also on the web using webgl. My problem is when I make a drawelements call per cube I take a hit on the frame rate. Is there a way I can make a single draw call to opengl es to draw them? The only difference between the cubes would be position and color.
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Jun 9, 2010
I have to dynamically add a list of views (the views use RelativeLayout). Can I do this by specifying the view definition in xml and instantiate multiple objects off it? This gives the usual benefits of separating the view part from the code (for e.g., making it easy for the UI guys to alter things) or Is going the ArrayAdapter the suggested/only route?
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Oct 26, 2010
The FAQ mentions a method of passing objects around activities. (It is not clear to me): "A HashMap of WeakReferences to Objects. You can also use a HashMap of WeakReferences to Objects with Long keys. When an activity wants to pass an object to another activity, it simply puts the object in the map and sends the key (which is a unique Long based on a counter or time stamp) to the recipient activity via intent extras. The recipient activity retrieves the object using this key.".................
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Jun 15, 2010
I have an application that have a Google map on Google Android 1.5 since we have been working on the application for a long time, we are not in stage of upgrading to the newest framework, so we are using 1.5. Now, I have map locations that are dynamically generated and drawn on the map at run-time to visualize some streams, Up to this point the application is working fine, Now my problem is that I am trying to filter the objects ( addresses) to visualize only the on-screen ones. I do NOT want to visualize the addresses that are off-screen. The way I am trying to do this is to check the screen-coordinates of each object (address) before visualizing it, then it the coordinates (x,y) more than (0,0) and less than (320, 460). I should visualize it. I am trying to use this approach, but it is not working for some reasons, I have tried many posts but could not understand why, there must be something missing somewhere that I am not aware of.
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Aug 23, 2009
How can we download a file from server using ftp? How can we use android's download manager manually to download ?
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Aug 26, 2010
Is there a good example showing how to query a server and downloading the response (JSON or XML)?
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Apr 19, 2010
I try to download a file from a tomcat server using the following snipet of code
try
{
BufferedInputStream getit = new BufferedInputStream(new URL("http://192.168.2.180:8080/android.apk").openStream());
FileOutputStream saveit = new FileOutputStream(path);
BufferedOutputStream bout = new BufferedOutputStream(saveit,1024);
byte data[] = new byte[1024];
int readed = getit.read(data,0,1024);...................
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Sep 4, 2010
I found a problem with the Market yesterday:
Upload a new APK version 134 After the upload finishes, cancels the upload Upload a new APK (different than the last uploaded file, but still version 134) Publish
10 minutes later I found my app was missing from the Market. I went to Developer Console and it asked me to agree to new license agreements, so I did. At this point, my app's status is again visible from the Market. I felt satisfied and went to sleep.
Next morning I got a flood of e-mails saying that my app shows "Download Error" in Market, and no one is able to install or update. I tried myself and say "404" error in logcat. Apparently the APK has been lost by Google server.
I uploaded a new version (just rebuilt and bumped version to 135), and I verified that the app can be downloaded again.
I guess the moral of this story is to always verify that you app can be downloaded after uploading ....
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Aug 18, 2010
I am using Apache's HttpClient via httpclient-fluent-builder to download a http page.
This is the code:
CODE:..............
Problem is that I get org.apache.http.client.ClientProtocolException
It's something with the host:port/url, beacause it works with urls without ports. I also get this same error with another Httphelper class than fluent-builder. Firewall is off.
Logcat: http://pastebin.com/yMMvvdQ3
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Nov 24, 2010
I want to download the source code of this open source project
but i don't know how ?!
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May 6, 2009
I want to download a apk file from my server and run this apk file in my application. i want to know is that possible. if it can, please post the sample code.
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Apr 14, 2010
I have uploaded my application's .apk file to a server. When i try to download that .apk file to my android HTC HERO phone then it gives error saying "file size cannot be determined". I also enabled settings to "allow install of non-Market applications" in my HTC HERO. Please help me if i am missing somthing. and is there any signing we have to do in android like symbian signing in Symbian Devices?
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Aug 4, 2009
I want to Download image from Server using Http Connection and at same time i want to show ProgressDialod till is not Downloaded i dont undestand.
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Aug 29, 2012
I downloaded my APK file to my web site, [URL].... and it says page cannot be displayed. I want to beta test the app with some people before going to the Android market, anyway I can fix this?
The name is correct and I can see the file with my FTP software after I uploaded it.
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Oct 19, 2009
Is there a way to package multiple apks into a single apk for users to download.
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Jun 30, 2010
The following code executes a function that retrieves a file via ftp and then displays it in an imageview. Since I'm using the main thread the UI locks up, somebody tells me I can use asynctask to make this work but I can't figure it out :<
Is anybody familiar with this that could offer me some guidance? code...
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Oct 30, 2010
The market place was working fine until today when I started getting multiple "download successful" messages. I've tried the following to fix it.
1. go to your settings
2. select "applications"
3. then select "manage applications"
4. press menu and select "filter" then "All"
5. scroll down to:
a) "Checkin Service" then select "clear data"
b) "Download Manager" then select "clear data"
c) "Google Apps" then "clear data"
d) "Google Talk Service" then select "clear data"
e) " Market" then select "clear cache"
However, when I try step 5c) I don't get the option to clear the data, just force stop. Does anyone know how I can get the "clear data" option? I've also deselected Autoupdate time and date.
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Jun 28, 2013
Why doesn't the Play Store download multiple apps at once? The Amazon AppStore has no issue downloading multiple apps at once.
I read on an xda post that I should have no problem after ICS downloading multiple apps at the same time, but I have found that untrue. I'm talking about multiple devices. OG Atrix, One X, S2, S3, S4, Note 2, Nexus 7. Using stock software, CM or other ROMs; Google Play will only download one app at a time which makes changing to a new phone incredibly time consuming.
Was that xda post correct or can no one download multiple apps at a time from the Play Store?
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Sep 29, 2010
I have a hosting account at godaddy ruinning Linux. Is has MySQL. I am creating a J2ME application that runs on android and I was wondering if there is any simpler way to connect from j2me application to my MySQL server?
Is it required to install anything at my server? which I cannot do because of the shared account. Any way to just open the connection, update some data in the MySQL from j2me application?
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Sep 22, 2009
I want to be able to download and install my app from my website, but when i do this at the moment i get the error:-
Download unsuccessful - Cannot Download. The content is not supported on the phone.
After looking into this it became apparent that the PHP Magic, that handles the downloads from the website, recognises the file as a .zip file rather then a .apk file and sends the it a .zip, that the phone does not recognise.
Does anyone know a way to get PHP Magic to recognise the file as an apk so that file extension does not get changed and the phone can recognise it?
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Sep 8, 2010
I am new to Android development. I want to know how you all manage objects. For eg we make object as A a = new A(); and then manage that object. But, here, we call A.class; My concern is that i don't want to call on Create(),nor do i want to push UI screen I just want to make 1 static object for 1 screen;and want to manage it throughout my application. that is, instead of calling A.class; can i call A a = new A(),and manage that object without pushing,and whenever i need i push that screen. Is there someway?
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Aug 16, 2010
Are there design guidelines to help decide if an application with multiple views should be designed with multiple activities or just one activity and control the back button itself.
I've tried both. My most complex applications using one activity per screen. However, now that I'm successfully written an app with just one activity and handling the back button myself, I don't see any compelling reason to use multiple activities. The one activity application is much simpler and more straightforward.
What advantages of multiple activities am I missing?
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Nov 12, 2010
Is there a way to pass an Array List of objects between activities? The myObject implements Parcelable and I'm able to successfully pass the objects around individually, but that means I need to have an exact amount of "myObjects" coded. I want this to dynamically grow/shrink by what the user does with the app. I have seen some posts on the web about doing:
Activity A
ArrayList<myObject> myObjArray = new ArrayList<myObject>();
Then when passing this into the intent I would use:
intent.putParcelableArrayListExtra("myObjArray", myObjArray);
Activity B
ArrayList<myObject> myObjArray = new ArrayList<myObject>();
Bundle extras = getIntent().getExtras(); myObjArray = extras.getParcelableArray("myObjArray");
However, the myObjArray always gets filled with "null". How can I achieve this?
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Aug 30, 2010
I want to pass an object from Activity B to Activity A. Scenario:
- Activity A calls Activity B
- User selects item in Activity B
- Activity B passes an object to Activity A
How do I accomplish this? And in which method do I read in the passed object in Activity A?
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Aug 7, 2009
I am new to this android stuff and SQLlite etc.I am going to log some numbers at a certain interval, and will put them into a dynamic histogram, by dynamic i mean that there will be a maximum number of samples in the histogram, the histogram and age stuff should be persisted either in db or plain file.For simplicity, I would like the samples to be stored in a blob type datafield, but i cannot se if this is possible. Alternative i could have another table with the samples Or I could simply have files with filename = name and content = samples.my concern might be unclear by now, but put simply, what is most effecient regarding power usage?
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Mar 31, 2010
I have an array of 5 Timer objects in my app, some of wich have been scheduled with a TimerTask. I need to be able to store and load these 5 Timers; is there a way to save Objects? Maybe storing the address of the array would be enough? How could I do that?
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Oct 20, 2009
I have been able to draw a map using 'MapActivity' class. Am unable to render 3D graphics on the Map. Is there any way to draw something on the foreground with the Map as the background?
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