Android :: Tab View Initialization - XML File Layouts
Jul 2, 2010
I have a problem with a tab view on android. I am using 4 xml layout files (each a RelativeLayout) as the content for tabs in a tab view. The main.xml contains: TabHost (@android:id/tabhost) containing a linearLayout which contains a TabWidget (@android:id/tabs) and a FrameLayout (@android:id/tabcontent). If I embeded the multiple one after another in the in the main.xml everything works fine (except my main.xml is unmaintainable which is the problem I want to solve by splitting the files into a simple main.xml which defines the tab and the content frame and then push the views onto this). The code I have to inflate and insert the 4 RelativeLayout xml files into the tab content is as follows:
mTabHost = getTabHost(); View wv = null;
wv = LayoutInflater.from(this).inflate(R.layout.user_tab, mTabHost.getTabContentView(), true);
mTabHost.addTab(mTabHost.newTabSpec("User").setIndicator("User").setContent(wv.getId()));
wv = LayoutInflater.from(this).inflate(R.layout.track_tab, mTabHost.getTabContentView(), true);
mTabHost.addTab(mTabHost.newTabSpec("Track").setIndicator("Track").setContent(wv.getId()));
wv = LayoutInflater.from(this).inflate(R.layout.chart_tab, mTabHost.getTabContentView(), true);
mTabHost.addTab(mTabHost.newTabSpec("Chart").setIndicator("Chart").setContent(wv.getId()));
// And so on for the multiple tabs.
When I run this the first tab (User) is empty and the remaining tabs have all the content from all the views. So tab2 has the content from tab1-4, tab3 has the content from tab1-4 and tab4 has the content from tab1-4. Returning to tab1 it then has all the content from tab1-4 now. The code works just fine, the events on the various objects in the views etc all are good. It is just that they are all muddled together in the view. What is causing this and how to correct it?
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Apr 24, 2009
Having read http://android-developers.blogspot.com/2009/04/future-proofing-your-a... l I noted this little section;
"Due to changes in the View rendering infrastructure, unreasonably deep (more than 10 or so) or broad (more than 30 total) View hierarchies in layouts are now likely to cause crashes. This was always a risk for excessively complex layouts, but you can think of Android 1.5 as being better than 1.1 at exposing this problem..."
Will the SDK warn us when we're reaching the limit for crashes?
And more to the point why does it crash and not return some form of meaningful error to the app? With an error code or thrown exception developers could create various levels of layout complexity and step down the layout complexity level until they find one the device will support.
No matter what the post says I see this as a regression in functionality and I definitely do not see it as "Android 1.5 as being better than 1.1" in any way.
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Oct 27, 2010
I have set my layout thru TabLayout within LinearLayout but still my button in the end couldn't be set properly as TabLayout divides all the fields in number of columns so can anyone help how to set 2 Layouts in one XML file
means all the fields in TabLayout and remaining both Login and Register buttons in Linear Layout ore some other so that they can set properly. code...
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Jun 2, 2009
I am working on developing several individual android applications. We had created common UI Layout View XMLs, classes and resources. I would like to share these common layout xml, classes and resources across all of my android applications. I dont want to duplicate them in my applications. Is there any easy way to do this?
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Sep 28, 2010
I am creating a few layouts with the root element being merge. inside the merge element i have a ScrollView containing a TextView. I am getting 2 errors: there is no resource to match the layout_below and layout above names i have put in.I have another layout xml file including very similar components, some of which also reference @id/headingLayout and @id/tabsLayout. Both of these XML layout files do not contain the component with name headingLayout or tabsLayout.Why is it that one layout file has no errors about these references and the other layout file does? What the crap am i doing wrong, the app will build and run like i expect, until i add this merge to another layout?I have even tried copying the xml from the working layout file, to find that it gives the same errors, something must be wrong with my new layout file. I have tried cleaning, rebuilding, opening/closing eclipse..
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Sep 6, 2010
I'm creating a game where there's a screen that, for the most part, is shared by four different activites - but a key portion of the screen will be completely different, depending upon which activity is active. Basically, on the left will be an image of the player and along the bottom there will be a row of buttons (let's say for Armour, Weapons, Magic, Skills). This leaves the top-right portion, which will need to dynamically change to represent the button pressed. (So, one moment the top-right portion is the armour selection activity, and the next it's the weapon selection activity, and so on.)
Is this possible? Can I have a layout within a layout and dynamically point the nested layout at a (nested) layout.xml of my choosing? Or, am I looking at just duplicating most of the layout four times (for the four different activities?) Or, am I going to be looking at linking the four activities to a (the top-right) view component, and then having to dynamically construct all of *that* view's child views based on the currently active activity? Well, that's about as much sense as I can make this question make.
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Feb 15, 2010
I have next situation: After installing application it has to init settings from server. And while it is not has right preferences it has to wait. I have several receivers and service - I don't want to check for initialization in every action in these components - I think there have to be better solution.
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CODE:........................
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Nov 26, 2009
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May 28, 2009
With version 1.5, I keep getting this error
05-29 01:36:39.440: ERROR/AudioRecord-JNI(1280): Error creating AudioRecord instance: initialization check failed.
05-29 01:36:39.450: ERROR/AudioRecord-Java(1280): [android.media.AudioRecord] Error code -20 when initializing native AudioRecord object.
and then:
05-29 01:36:39.630: ERROR/AndroidRuntime(1280): java.lang.IllegalStateException: startRecording() called on an uninitialized AudioRecord.
My code:
ar_test = new AudioRecord(MediaRecorder.AudioSource.MIC, 11025,
AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_8BIT, 200000);
ar_test.read(ar_buffer, 0, 150000); ar_test.startRecording();
toneTimer.setTimer(10000); toneTimer.countdownTimer(); ar_test.stop();
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Jun 12, 2009
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Sep 22, 2010
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code:....................
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