Android :: Creation Of Activities From Tabhost
May 14, 2010
I have a TabActivity. Within this activity (in the onCreate method) I create a TabHost and a TabSpec and do a tabSpectSearch.setContent(intenSearch); The Indent is created using intentSearch = new Intent().setClass(this, MyActivity.class);
As far as I already found out the class MyActivity is instantiated when I select the tab, to which it is connected. Is there a way from my TabActivity to force the creation of all activities (all tabs) at once?
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Jun 23, 2010
I'm trying to create multiple tabs, each with a different Activity. The only downside is i'm using a custom layout file thus my class extends an Activity rather than a TabActivity. While trying to run, it fails and suggests calling TabHost.Setup(ActivityGroupManager agm)
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Nov 16, 2009
Since the TabHost API does not offer a way to change existing views or activities, what is the preferred means to replace an existing tab?
I only know of: clearing the tabs and adding them again. Is there an alternative? Or is this really not provided by design?
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Jun 30, 2010
how to call BarCodeScanner, and return the value to a field.so now, i have a toast that says "successful scan" and then i want to pass the result to a new activity. when i comment out my intent, everything works (minus the passing of data/switching of screen, obviously) but when i run my project as is, it FC's no errors reported by eclipse in code or xml. any insights?
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Jun 3, 2010
I have an Android application with a main activity that is the tabhost. I'm adding multiple tabs to the tabhost with an intent to several activities.
My problem is that these activities are not created (onCreate is not called) until I click on the tab. This is a problem because I need to register broadcastreceivers: there may be broadcasts that are sent -before- a particular tab is opened.
I tried to work around this by:
Setting my receivers as static and registering from somewhere else. This is not possible because I need to call into methods.
Calling into tabHost.setCurrentTabByTag(the_tag) and then switching back to my root tab. This only works sometimes and this is a very ugly solution imo.
Not using activities but just using views instead. Also not a very elegant solution because it turns my tabHost activity into one huge master class doing all kinds of unrelated things.
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May 10, 2010
A question that might be a bit general/basic knowledge, but for me it has a quite direct background, so i'll form it as an example:
I have an activity "entry" showing something equivalent of a blogpost, that might have comments. You can click somewhere to open a "comments" activity. But in this activity there are links back to entries, creating a nice line of activities.
If I call the "entry" activity (with an intent) on a link to show this entry, am I re-using the old activity, or am I creating an endless string of entry, comment, entry, comment activities (pretty cost- ineffective that would be).
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Nov 1, 2009
Is there any free or opensource Eclipce plug in avaliable for UML diagram auto generation for Android?
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Apr 28, 2010
I use the following code to create a folder "mymir" and a file ".nomedia" (in the mymir-folder) on the sdcard of an android unit. However, somehow it fails with the exception that the folder the ".nomedia"-file is to be placed in dosn't exist.
Here's the code:
CODE:....................
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Nov 17, 2010
I'm looking for apps which allow me to make music. Preferably something which does not just make crappy loops. Something with a staff or matrix would be nice.
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Feb 3, 2010
I created a simple client socket from my Activity, but it fails. I am running this activity in emulator and server runs on PC(its a different application without Android stuff).
*clientSock = new Socket("127.0.0.1", 30001);*
logcat shows java.net.SocketException: permission denied <maybe missing INTERNET permission>
If I enable permission for my Activity(android.permission.INTERNET), my Activity constructor itself not called and logcat shows following info. Permission Denial: starting Intent < flg=0x10000000 cmp=com.example.client/.MyClientActivity > from null <pid=-1, uid=-1> requires android.permission.INTERNET.
Any suggestion on how to resolve this issue?
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Feb 12, 2010
I am trying to write a code for an SMS widget. I wrote something that I can compil, and print on screen my first sms. When I click on next, nothing happend.
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Nov 25, 2009
I haven't seen much about music apps for Android. I just saw a video of NESynth for iPhone. Is there anything similar on Android. I hope there will be.
I have Musical, Synthesizer and Rock Out. They are ok apps for free. I'd pay for NESynth though.
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Mar 31, 2010
I would like to display a an access dialog activity at the start of my application.
In other words, I would like to start another activity (in dialog theme) as soon as my Main Activity is loaded. But, I know that I can not start an activity while another is creating.
I tried to start this activity in the onResume() method : I can see the new activity called, but the Main activity do not respond after closing the new activity.
Is there a solution to do this, without using delayed intent ? May i use a special flag for my intent ? I did not find, in the activity cycle, a way to detect the end of activity loading.
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Mar 22, 2010
How do most of you wise developers create a YouTube video for your Android Apps, if at all.?
Do you:
Hire some teenagers to do something creative and viral? Use a tool to capture the screen as a video and then add caption and voiceover later? Set up a home camcorder on a mini tripod, aimed at your Android handset on the table top? Don't bother with the video since it's too much trouble?
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Apr 21, 2010
I was wondering if it is possible to start a ListActivity and in real time decide how far down the list it should be focused on. (Example: When the activity is started it checks for certain conditions and then it may scroll down to a row partially through the list.)
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Sep 27, 2010
As the title says, where can i find small application creation jobs for Android.
Please don't tell me 'freelancer' because I have already checked there.
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Feb 8, 2010
Is there a simple way to change the contents of a dialog box in Android without having to re-create the dialog box? I know that Activity.onCreateDialog() is only called once when the dialog first needs to be created, and this is where you initially set the dialog's contents. I need to change the dialog's contents later, so I'm wondering what is the proper way to do this.
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Mar 27, 2009
My app uses a TabHost containing one tab with a ListView and another tab with a simple form. When the keyboard is slid out in order to write into the form fields, I don't get automagic scroll bars added to the LinearLayout around my form elements.
The resource xml follows.
CODE:................
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Jul 21, 2010
In a TabHost widget, I can create a new tab with its content (Intent) using TabHost.addTab(TabHost.TabSpec tabSpec).
We can remove all tabs we created by calling clearAllTabs(), but I can't figure out how to remove the tab or just replace the content (Intent) inside the tab with new Intent.
so what I need something like removeTab(int index)
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Jun 13, 2010
I have a tabhost...
in this tabhost is a Intent,and in the activity must change to other activity,
question is I hope the other activity at same tabhost switch?
Can do this?
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May 28, 2009
Because of i add image on the tab,the tab looks small,and the string of the tab is on the image now. So,i want to make the tab looks larger,and the string of the tab could under the image. what should i do?
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Jul 24, 2010
I recently want to put mapview in tabhost but now is the question i can't figure out how to do this right!
here's my source code...
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Sep 22, 2009
I'm a programmer looking to play in the mobile world. The application I'd like to play with would support my musical hobbies. I suspect a mobile phone with a music player could easily be programmed to support a classical musicians practice sessions. Access to media player APIs without the need to open external apps or do clunky things with files.Adequate access to playback API to create specific notes and beat patterns. As a hobby application, this should not require expensive tooling.I can switch to a new phone to use the application. Bonus points for something that easily ports to a netbook.I will admit I new to the world of sexy phones. I currently use an obsolete voice device with text messaging. I won't revealing my current flavor of programming because learning a new platform is just fine.
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May 11, 2010
I have an activity (called Sender) with the most basic UI, only a button that sends a message when clicked.This works ok, the message is sent but every time a message is sent a new instance of Sender is started on top of the other. If I call sendSMS method three times, three new instances are started. I'm quite new to android so I need some help with this, I only want the same Sender to be on all the time
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Apr 4, 2010
When I add this code to my Android 2.1 Java app, it fails:
CODE:........
Do I need a special permission to create a database, or can anybody provide a suggestion how to find out what goes wrong?
Here is the LogCat output:
CODE:....................
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Jan 31, 2010
Say my app has a widget and I use a configuration screen to do initial app widget setup and set a few preferences.
I want the user to be able to change those settings by simply going into my app's settings screen and clicking an intent preference to open up the same options the user was given when the app was created.
Can I use the same activity as the configuration activity? Will I have to handle it differently? How does the existing widget get updated with the new settings?
How can I get this to work?
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Oct 14, 2009
I trying to understand how a new process is being created based on AndroidManifest.xml, also looking for the possibility of creating/ forking a new Java process/new DVM instance at runtime.
I could find that using Runtime.exec one can issue system commands or launch native applications, but this is not what I am looking for, I am looking for creating an equivalent java process just as the parent java process.
Can I launch an installed android application at runtime from another android application? Whats the way for doing this?
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Nov 24, 2009
I currently have a TabHost with 3 tabs.The content of each tab is an activity. The first and second tab make HTTP connections.The first tab still uses the UI thread (which i'm changing) so it would explain the slow orientation change since it's creating a fresh activity and making all those connections again. What I don't understand is why if I am on say Tab 3 which makes no connections at all does changing the orientation take such a long time (up to 5 seconds).In playing around with the TabWidget I noticed something that may be related.
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Jul 6, 2010
Is there a possibility to navigate between Activities tabs in TabHost using back button? When I press it, I go out of the main Activity to the previous one.
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Aug 9, 2010
I have to create tab bar in my application in which i have to navigate between activities under single tag. So that i tried many ways one of which is to clear all tabs from tabhost and create new tabs and add on tabhost but it gives me unexpectedly close error.
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