Android :: Do Network Operations In Appwidget?
Aug 22, 2010
I'm developing a Android AppWidget for my application. For updating my appwidget I need to download data from network. But when I try to do that in onUpdate method, my appWidget is killed by Android system. I learnt that time consuming operations can't be done in receivers so I launched a service from onUpdate method and launched a thread from that. But still the problem persists.
Can anyone please let me know how to do network operations in Appwidget?
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Sep 16, 2009
OK I'm reading this page:
http://developer.android.com/guide/appendix/faq/commontasks.html#thre...
The code is as in the example (see below). In my application, the worker thread has done loading of large bitmaps, and I need to notify the UI thread the filename of the bitmap that was loaded as they get loaded. How can I notify the UI thread of the filename of the bitmap just loaded? I can see anyway to for updateResultsInUi() to be able to take a parameter from the example below.
public class MyActivity extends Activity {
[ . . . ]
// Need handler for callbacks to the UI thread final Handler mHandler = new Handler();
// Create runnable for posting final Runnable mUpdateResults = new Runnable() { public void run() { updateResultsInUi();
} };
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
[ . . . ]
} protected void startLongRunningOperation() {
// Fire off a thread to do some work that we shouldn't do directly in the UI thread
Thread t = new Thread() { public void run() {
mResults = doSomethingExpensive();
mHandler.post(mUpdateResults);
} };
t.start();
} private void updateResultsInUi() {
// Back in the UI thread -- update our UI elements based on the data in mResults
[ . . . ]
}
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Aug 28, 2009
Android experts, I have a tricky question that I would like some advice on. code...
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Mar 31, 2010
I'm just starting with Android development and I'm coming from JavaScript/HTML world so I'm currently investigating the possibilities of the Android SDK.
The HTML 5 canvas supports composite operations (See here).
Is this possible in an Android Canvas? I scanned the API of the Canvas class but couldn't find anything useful. I need at least the composite operation "source-in" or (if this isn't possible) "source-atop".
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Oct 18, 2010
I'm developing an Android application with database storage.
I want to test some classes that I use to access database.
I've found ActivityInstrumentationTestCase2 to test Activities but I haven't found anything to test classes.
How can I do that? I haven't used jUnit before.
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Nov 13, 2010
Is it possible to have low level access in Android with Java/NDK to create for example card scanner like scandisk or card defragmenter? I move a lots of stuff around my card and it gets fragmented quickly. I have experience with FAT32 defragmenting on Windows, but I'dliek to do this on Android.
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Mar 6, 2010
Can any body give me some tutorials about operations on the android emulator ?
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Jun 8, 2010
I've read this in a few articles, that one should avoid floating point operations within the physics update of a game.
But how do you really achieve this? Surely all half decent games are going to involve this kind of maths?
Does it mean, convert all your variables to int, or use double instead, or simply just cut it out as much as possible?
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Nov 27, 2013
I've downloaded the android 4.4, but when i'm going to settings, security, the program crash the operations.
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COMPILATION: KRT16S.S005.13116
I want to mark the option install apps out of play store.
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Feb 19, 2010
So i was wondering if its possible to for an application that i would write to be constantly running in the background and alter regular phone operations. For example this could be something like as soon as you receive a text from anyone you forward it automatically to another number. Is something like this at all possible? Just to be clear I don't want to solve that particular problem through some other means, just want to know if apps can accomplish that. Also if that is possible is it possible for an app that i write to alter more immediate and instant things, like an incoming call.
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Jul 19, 2010
I am finding that file operations are extremely slow on emulator. The same operation which takes less than a few seconds in a real device, takes minutes on an emulator. I am using a ubuntu linux machine with 2.4Ghz CPU, 2 GB Ram. I would really appreciate any help in resolving this. I am totally stuck due to this.
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Nov 22, 2010
I am designing an app that will have some activities separated in tabs. Some of them will have to perform tasks in the background will the user is in another tab. What is the best strategy for designing an app like this? I was thinking about using a service but it can be killed by android dalvik, isnt it?
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Apr 11, 2014
I do a lot of Android app testing. I use my regular phone, where I have my contacts and my regular gmail account. I never used a credit card on this account. I mostly use APK files to install the apps. I have 2 questions:
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Example: instal APK file > says permissions "Network access" and that's it.
Can this app also read my data or make phone calls, even though those permissions were not displayed ?
What is I use an app to display ALL permissions ? Can it really display all or is there an way to still have hidden permissions ? I use Android 2.3.7 root and 4.1 no root.
2. Can an app make unauthorized hidden operations, like place phone calls or send texts or steal my gmail password ?
Like I said, I never used a credit card, so at least that's not a problem. But I have my SIM card - can an app place a value added call or SMS (I don't know the exact English term - expensive call), without me knowing about it ?
Or compromise my Gmail account ? I have an alternate email for recovery.
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Nov 1, 2013
How to get my tab back to normal operations.After changing fonts it req for restarting and it's just hanging at booting process. Try to recover but it doesn't work. Then i try to use install 86vebc ROM by using CWM v6.0.2.8 and now it's keep on entering CWM again and again even after rebooting.I only able to give the specification as below because i couldn't find the exactly brand or model for my tab.
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Jul 31, 2010
I am trying to debug a problem where my widget becomes invalid and a new one fills in.This only happens once at the beginning of time and then it remains the second widget forever.So, I want to put code in to narrow down the point in time when it happens.Then I would get a list of all the enabled IDs and see if I am in the list. I cannot find a method, member, attribute, etc. that would give me my id?
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Jan 3, 2010
I am attempting to query a database and update information in the appwidget screen based on changes to the database done while in an activity so that when the user exits, the changes are reflected in the widget on the screen.The appwidget is being updated with a broadcast from OnPause() and OnStop() in my primary Activity.Relevant pieces of the code are below.The Toast shows me that the data is correctly being pulled when OnUpdate() is called.But the widget refused to change
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Aug 9, 2009
I have a problem, I want a appwidget with a listview, but it seems that appwidget does not support this elment.so is there any way to reslove it?
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Apr 25, 2009
Just wonder what limitations there are for UI elements in AppWidgets? I tried a ListView and was met with an error. I saw the other post that EditText isn't available.Just wondering if there was a full list somewhere?
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Dec 31, 2009
I have a strange problem, on a few devices. I have developed an AppWidget, and it uses a database to store the configuration for each instance of the widget. The widget id is the key in the database.Everything works on most devices, but I got a bug report a couple of days ago. A user said that the widget never worked after reboot. The user who was very helpful sent me a log from his phone, and I could then see that the widget got a new id each time he did a reboot.
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Jan 10, 2010
Can anyone tell me what views can I use in an appWidget?
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Jul 31, 2010
LinearLayout just works fine in an AppWidget. However, when I change the layout's xml to a TableLayout, I am unable to get the widget working :(.
Can anyone point me to a sample? [could not find anything on the web]
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Mar 6, 2009
I have been looking at the ConnectivityManager class documented at http://developer.android.com/reference/android/net/ConnectivityManage... .
I would like to know if an Android application can open a network connection (socket) on a specified network interface [on a device supporting multiple network interface types WiFi, Cellular, WiMax etc] ? I am looking for the capability for an application to open a socket on a given type of network for example over WiFi network or over 3G Cellular Data network.
If this is possible in Android, how would I code this requirement within the API Framework ? The ConnectivityManager enables an application to learn about available network connections and currently categorises them as either TYPE_WIFI or TYPE_MOBILE.
There is a member function in the ConnectivityManager class called requestRouteToHost(int,int) [url] which "Ensure that a network route exists to deliver traffic to the specified host via the specified network interface. An attempt to add a route that already exists is ignored, but treated as successful." Sounds like this would install an IP routing table entry to reach a given host via a specified network interface type (WiFi or Mobile). After calling this would it be sufficient for an application to open a socket and connect to the desired destination address ?
Or perhaps the application needs to bind() a socket to a local address of a network interface of the desired type (WiFi or Mobile) Or by setting a socket-level socket option of SO_DONTROUTE ?
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Nov 9, 2009
Is it possible to launch an app widget from another application.
For example, I have a button in an application. When I click on that button, an appwidget must be launched.
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Sep 7, 2010
I am trying to update an AppWidget manually when a user setting changes on the device.I can tell that my AppWidget onUpdate method is being called as a result since I log some debug strings to logcat in the code. However the AppWidget itself doesn't change on the screen.Here comes the interesting part: if I rotate my device and force a refresh of the home screen (from PORTRAIT to LANDSCAPE or vice-versa) then finally my AppWidget gets updated. However rotating the device does not trigger the onUpdate method to be called, so the AppWidget must be using the RemoteViews provided in the earlier update. Can somebody explain me what to do to force the home screen redraw of my AppWidget when it processes an update?
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Nov 4, 2009
I wrote a widget that has been working fine for most folks. However, I started getting bug reports about how the widget would be blank on reboot (not receive an update?), and it seemed that the Sprint Hero continually came up. I thought I was crazy but I'm finding that other people are having the same problems:Searching Google for "sprint hero appwidget problems" yields:"Added warning about the problem on the Sprint Hero device: On the Sprint Hero (HTC ROM v1.29.xxx) the AppWidget API is broken in such a way that it won't."I e-mailed the author in hopes of getting an answer, but I haven't received any response. Does anybody with a Sprint Hero know what the problem is?
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Jun 24, 2009
Using Appwidgets, If we use TextView in layout provider xml then, we are able to set the text in Provider.java using remoteViews.setTextViewText() method.
Similarly, if I use AnalogClock as AppWidget in xml then, is there any method available to change the android:dial value using RemoteViews or AnalogClock api's in Provider.java ?
For Ex- I need to load two dial png's based on AM or PM.
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Apr 15, 2009
I've been looking at the new 1.5_pre SDK today, and the new AppWidget API in particular. I was hoping to write a widget for posting to Twitter as part of my nanoTweeter app. The interface I had in mind would look very similar to the Google Search widget, with an EditText and a submit Button, but as far as I can see there's no way to get at user input in a RemoteViews. Is that right, or am I overlooking something?
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Apr 30, 2010
I seem to be having trouble reading preferences from my AppWidgetProvider class. My code works in an Activity, but it does not in an AppWidgetProvider. Here is the code I am using to read back a boolean:
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
boolean autoreplyon = settings.getBoolean("autoreplyon", false);
However, I get the "The method getSharedPreferences(String, int) is undefined for the type widget" error (widget is the name of my AppWidgetProvider class).
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May 3, 2010
Is it possible to receive SMS message on appWidget?
I saw android sample source(API Demos).
In API Demos, ExampleAppWidgetProvider class extends AppWidgetProvider, not Activity.
So, I guess it is impossible to regist SMS Receiver like this code...
My goal is to receive SMS message on my custom appWidget.
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May 29, 2009
The documentation hints that: "...the lock screen could also contain widgets, and it would have a different way of adding, removing and otherwise managing widgets." [1]
Now that I have 1.5, I can see the lock screen changed to show the same background as the home screen. Is there a way to put AppWidgets on the lock screen in 1.5?
[1] http://developer.android.com/reference/android/appwidget/package-desc...
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