Is it posible to load a class from the internet in Android? My app would download a class with some data, save it on sdcard, and then load the class. I want this because loading data via classloader is much faster then from a file.
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I am new in android
I have created 2 classes.first extends activity and 2nd extends View.
I want to add buttons,image Views etc. into the second class.
how can I do this.
Is it possible to dynamically load classes from a URL into your application in the same way as a desktop application can? For example, can you do a simple boot-strap application which you install onto the device, that boots up loads the main jars required for the applications from a server, or from a local jar on the SD for example?
View 2 Replies View RelatedIs there any way I can load a class based on what version of the OS the phone is running? For example:
I made an app which requires 1.6+ Android. Is there a way for me to load one class or the other based on what OS the phone is running? I'm asking this specifically for contacts. The database was changed from 1.6 to 2.0 and the old version doesn't retrieve contacts on the new OS phone. I'd still like to keep my 1.6 requirement, but at the same time I'd like 2.0+ phones to access the contact part of the app.
So can I make 2 APIs, somehow pack them with the app and decide on the fly which I choose to import?
Is it possible to have the android load up another UI from a different class through a Onclicklistener? What I mean is that if I have two UI classes (c1 using m1.xml and c2 using m2.xml). Is there a way to load the c2 UI though the onlicklistener set on a button?
When I w programming in Java i usually add an actionlistener to the button and create a new instance of c2 in that actionlistener. That doesn't seem to work here, and so I was wondering if theres another way to do this?
Is there any documentation on the filesystem used for Android? I'm talking about an explanation of the contents of /dev or /etc, and not YAFFS or whatever.
View 2 Replies View RelatedI'm a big fan of just having direct access to my devices (i.e., no sync, no "management" front end). So this isn't about local access from the device (using MyFiles or Astro), but from a PC in the same location (so not like 3G remote). So far I've explored these options: USB Connect phone, mount from notification menu, and there you go. Bluetooth Pair phone, use "send file" from PC BT app (running in system tray).
Files drop into a 'bluetooth' directory, ready to move/use. Android Web OS Very beta-esque right now, but runs as a service on the phone, then you can access the filesystem (and SMS, eventually other functions). You can copy up to the phone or download (basically via a simple web mechanism). Use across Another service on the phone, a basic FTP server accessible across WiFi.
Works pretty good so far, I created a 'network location' in Windows, then a shortcut on my desktop into my MP3 directory on /sd. So I just open that folder, copy over MP3s. Doesn't matter where the phone is currently sitting or connected. For the services type options, I'm going to check out something like Locale or Tasker, when I can trigger the service to fire up based on a rule (a specific WiFi network trigger would be outstanding).
I was trying to make an anonymous class to upload a file to a server.
I wanted to make that easily reusable much like some kind of component.
Everything works fine but as a final touch i wanted to add a function to check if internet connection is available.
Problem is, the call to the connectivity manager needs the Context :
ConnectivityManager connec = (ConnectivityManager) getSystemService (Context.CONNECTIVITY_SERVICE);
Since i'm in an anonymous class and I've read that it's not a good idea to pass the whole context to classes, I wondered about two things :
1 - Is there another way to check internet connection without the Context ? 2 - Why in Android internals make it necessary to have the context just to check if the device is connected to internet ?
I'm wondering if and how one can load dex or class files dynamically in dalvik, some quick'n'dirty test function I wrote was this:
CODE:.................
whereas the Foo interface is this
CODE:.................
and f.dex contains some dx'ed implementation of that interface:
CODE:...............
The above test driver throws at defineClass() and it doesn't work and I investigated the dalvik code and found this:
http://www.google.com/codesearch/p?hl=en#atE6BTe41-M/vm/Jni.c&q=Jni.c...
So I'm wondering if anyone can enlighten me if this is possible in some other way or not supposed to be possible.
I would like advice from those with 2.2 on Orange. I've had my Desire for 2 months now and love it-apart from one thing-the damned Internet connection. Quite often, with a strong 3G+ (HSDPA) signal, my internet connection fails to load data. Then, a few minutes later, in the same location, it works perfectly. I know for a fact that this is not a network only problem. The reason I know this is because I previously used the exact same SIM in my iphone for 6 months in the very same locations and it always worked perfectly.
Therefore, my strong suspicion is that the problem is a result of the combination of the Orange branding on a Desire and the network itself. I'm sure I read of a couple of posters here who had the very same problems and when they moved to 2.2 the problem disappeared. Can anyone confirm? I've been waiting patiently for the Orange update to 2.2 but am getting fed up and I'm concerned that the Orange bloatware may still cause an issue after this. Hence, I'm considering a debrand and update myself.
the internet often fails to fully load the page I request, even when the display at the top is indicating 3g/3g+. The web address bar will half load and then stop and the only way to get the internet working again appears to be by turning the phone off and on. It does this 3 or 4 times a day. Also, whilst on the topic of internet problems, Google will often look to have loaded, but the location bit under the search box will never appear, nor will my default email address at the bottom of the Google homepage. When this happens whilst I can type in the search box, clicking the search button does nothing and can only be remedied, again, by turning off and on. This also happens a couple of times per day at least.
Secondly, since weekend, my phone has been 'crashing' (for want of a better word) mid-way through text messaging (very annoying if it's a long message as it doesn't save any progress). The screen will go black, signal will drop to nothing with a cross through it and then I'll be returned to the screen I was in previously. The same happens during calls - the phone will hang up, call will end, and the screen will go black with a line through the middle of it. I've had the phone since May and, as it's Orange branded, is still on 2.1. To be honest, overall I'm becoming fed up with it - seems to have more problems than it does positives at the moment, but I'm stuck with it for a while yet it would seem.
I'm using my Milestone fine and everything, but there's a small problem. Sometimes when I'm using the Internet, it'll say say I have a 3G or H Connection but doesn't load anything? The same happens on the Android market, it'll stay loading a list of Apps for ages and will tell there's a trouble with the connection, but then 2 minutes later it'll be fine. Using a T Mobile sim in Motorola Milestone.
View 1 Replies View RelatedThis is really pissing me off. I turned my phone off and now when I turned it back on it stays in the bootload android screen. If I press the cube button it goes to cube and then I'm able to navigate around to internet and other media features but it refuses to load up the home screen. Is there anything I can do without having to do a hard reset. I don't want to reload all my apps over again.
View 5 Replies View RelatedFor some reason today my phone wont load web pages or facebook app while im on my home wifi. I have never had any wifi problems before this. Actually the only problem I have had is sending and receiving picture messages. Anyone know what may cause this? The phone says its connected and full strength signal also.
View 1 Replies View RelatedIs there a cogent reason why the SD card cannot be partitioned without a FAT32 filesystem? From all the benchmarks I've ever seen, EXT4 kills FAT32. However, when I tried using an SD card partitioned with only an EXT4 partition, vold (the volume management daemon) wasn't happy at all. can manually mount the volume from the shell, but that does no good as far as android recognizing that the partition has been mounted.I'd be willing to hack up the vold source code if it would be useful, but I just want to know if anyone has any thoughts or experience on the issue.
View 7 Replies View RelatedI would like to know the best way to copy a file in the filesystem? (android java function )(sdcard/video/test.3gp -----> sdcard/video_bis/test2.3gp)Is there an example somewhere?
View 4 Replies View RelatedEverytime I start my phone up it says the SD card is or has unsupported filesystem. When you click on it.. it asks to format... you click "format" and then the phone just freezes. If I receive a picture in a txt and I click on it, the phone freezes. When I plug my phone into the computer through the USB cable, mount, and try to format it through the computer it says windows is unable to complete the format. I've reset the phone to factory reset also, no luck.
View 5 Replies View RelatedHow can I show pictures in WebView without saving images into file system?
I have tried to implement my custom Content Provider, but method openFile returns ParcelFileDescriptor that points into filesystem (or socket). My pictures are in filesystem, but in encrypted form.
I have tried also URL.setURLStreamHandlerFactory, but in android java it is useless (because custom streamHandler can be register in jvm that is not allowed). I also try html code "img src="data:image.gif;base64,R0lGODlhiAAkAMQAANOOk...", but in embedded chrome it's not working.
Is it possible to access the filesystem of an sdcard image through something like Windows Explorer?
i.e. mount the sdcard as a drive or web folder or something. I have some xml files stored on my sdcard image which I frequently want to edit.
Ideally I would like to be able to edit these files directly using my fave xml editor (either through the filesystem or webdav).But is this possible?
If not, is the only alternative to pull the xml file from the sdcard to the dev machine filesystem, edit and the push it back?
I am new on android and building an application which uses webservice to collect user information in XML. I also get path for a small jpeg picture of each user. (Currently there are about 200 users) I am parsing the XML and storing the information in SQLiteDatabase. Pictures are stored as blob and able to retrieve them.
I display names of users on listview with images as well. But is this a good solution for storing pictures in SQLite Database ? or should consider storing it in file system ? Which is suitable in terms of performance , as well as memory and any other pro and cons on Android.
Also like to know which is best performing XML parser for Android ?
My purpose is only to parse xml files which I get through web services and sort out the data to store in storage. And lastly my memory goes off easily when I load all images to display in list view after making thumbnails of each (which is obvious).
Was wondering is there any library/framework/app available which dynamically loads images as and when required (when that list item is on display) something like Gallery program ?
Just wondering if the Hero supports other filing systems other than fat32 on SD (stock rom - no root), I would like to run ext2 ideally.
View 1 Replies View RelatedI'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?
View 4 Replies View RelatedI have been assigned the task to use an android tablet to run a single app in an enterprise setting. Ideally, when one switches on the tablet this app should be loaded perhaps during startup and the user need not step out of this app. The app logic itself is rather easy but I am wondering if it is at all possible to load a single app during load and not allowing the user to step out of it.
View 2 Replies View RelatedIm totally new to the smartphone/android topic and very happy that i managed to partition/debrand/root my Desire and flashed LeDroids Rom on it! ^^ ( im a windows XP user )But i have some questions about my partition and filesystem: I have a 4 GB SDCARD and a 512MB Partition on it for the apps. So i figured out there is a mnt folder that seems to be like an exact copy of my SDCARD folder.
How do i know what my partition is ?
And how do i know how much space is left there for Apps?
When i plug in my Phone via micro usb and browse my SD card i dont see a MNT folder. Does that mean the MNT folder is the main partition (3,5bg?) ? Because when i download a youtube video via jetVD (i was prompted to use a download folder on my SDCARD) it saves the videos under: mntsdcardmovies (also my player shows the path to that directory)but the movie files are also available under: sdcardmovies
Could somebody explain that. btw: i use the app SUFBS to browse the SDCARD on my Desire.
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.
View 2 Replies View RelatedWhat 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;.......................
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:........................................
I have just started android. I just want to know that how can i call activity class from other java class. i just want to pass class object to activity class.
public class GsonParser extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
MagazineThread thread=new MagazineThread();
thread.start();
}
public GsonParser(JsonMagazineParser Obj)
{
}
}
and i am just doing like from other class. GsonParser obj=new GsonParser(this);passing obj to activity class.how can i achieve that.
Is it possible to load a layout XML at runtime and load into activity?
In my app, I have various types of data like Person, Company, City, etc; The requirement is to dynamically load the layout, find views by tags (property names like Person.name, Person.address) and then fill in data. For example, if user has selected an object of type Company, we want to load a company.xml layout, inflate it and then associate various properties (company name, company slogan, city, address, revenue) to tagged views. One possibility I see here is - each view in the layout will be associated with property-name as tag and then appropriate data will be loaded in appropriate views.
What should be the best design you would recommend?
I have a couple basic questions I'm hoping I can get answered before I start messing around with different ROMs/Radios/Kernels. Before I rooted, when I felt like things were getting cluttered or had an OCD attack, I would do a factory reset. How does that work?
What "source" files are used? Is the emmc directory the only directory not "cleaned" in a factory reset? Keep in mind I'm used to my workstation/laptop experience where I would format, then install a clean version of the OS from a CD/DVD and then I would install 3rd party apps and move my data back?
Any analogies would help my simple mind! One day I did a factory reset, the decided to root. Everything went perfect. I moved some bloatware to an apps.disabled directory, then did all my customizing again. Now I want to play with different ROMs. I do however want to hedge my bets in case I ever want to go back to where I am today. I've done a clockworkmod backup.
Does that essentially copy all the phone storage (except SD Card data) over to the SD Card? If not, what is left behind. Will a clockworkmod wipe erase ALL of the on board phone storage (except the SD Card data)?