Android :: How To Retrieve XML Attribute For Custom Control?
Mar 17, 2010
I've created a combo box control with a edittext and spinner. I'm trying to let the android:prompt attribute be passed onto the spinner, which means I need to catch it in the constructor which passes my the AttributeSet and set it on the spinner. I can't figure out how to get the value of the prompt.
I get back 0, which means it didn't find the attribute.I also did a ta.count() which returned 0. So I'm not getting anything back.My XML simply defines an android:prompt value.
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Jul 8, 2009
I'm creating my own View class, and defining custom xml attributes with a attrs.xml. As long as I provide each attribute manually, there is no problem, but
code:...................
The android:text is properly set in my instance, but the borderDrawable is not. I guess this has something to do with namespaces, because inside the styles.xml, the name="mypack:borderDrawable" is not handled by the XML parser's namespace facility, because its inside an attribute value. So "mypack" is in no way connected to "http://some.weird.url.com/seems/not/to/ matter" and adding it via xmlns:mypack... to the stylefile would not help, I guess. In the same file, "android:text" is somehow recognized, even though "android" is AFAIK only a ns-defintion for [url], which is also not declared in that file.
So what is the proper way to set a custom attribute in a style?
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May 11, 2010
you can see where he's defined a custom widget called ColorMixer.ColorMixer has an attribute named "initialColor" declared in attrs.xml.but getIdentifier never returns anything but zero.Is there something more I should be doing? I want to re-write this code to be completely independent of 'R'
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Apr 3, 2010
I have problem to solve. I have listview in which android:background="#FFFF7W" value I would would like to put it in the android:cacheColorHint= "the value of the android:background".If anybody put some light how to refer the other attribute value to another attribute of the same element would be grateful.
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Oct 12, 2009
The "View" instance currently provides a way to retrieve the saved state using the methods below, but there doesn't seem a way to retrieve the view's saved state in the constructor, or onFinishInflate. The custom view is constructed via XML, so I cannot pass the saved bundle from the Activity to the View's constructor.
Relevant methods: - protected Parcelable onSaveInstanceState() and - protected void onRestoreInstanceState(Parcelable state)
I need this because I make an asynchronous network request in a custom view constructor, and if there is a configuration (orientation) change, the custom view is getting reconstructed, and the request is getting performed again. I want to intercept the second request in the constructor. I can do this in the onRestoreInstanceState, but I need to handle this in the constructor.
It would be nice if there was a method such as getSavedState so that the decision can be made in a constructor or onFinishInflate instead of waiting for the onRestoreInstanceState trigger.
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May 27, 2010
I am currently using a date and time picker to retrieve a user-submitted date and time, and then I set a control's text to the date and time selected.
Now, while the above code block does bring up the date and time widgets and sets the text, the code block is being executed in full before the user can select the date.. ie: It brings up the date box first, then the time box over that, and then updates the text, all without any user interaction. I would like the date widget to wait to execute the time selector until the date selection is done, and i would like the settext to execute only after the time widget is done. How is this possible? Or is there is a more elegant solution that is escaping me?
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Oct 7, 2010
I'm reading the android docs on custom component development and i'm a little confused. If you're creating an activity, you can add add a hierarchy of views via setContent. however, if you're creating a custom component, you have to handle everything in the draw() overload.if i want to build a custom component that relies on a view hierarchy, is the model simply to create a hierarchy internally and then in draw call myViewHierarchy.Draw() or something?
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Aug 9, 2010
I understand how to create a custom Android control, and I believe I understand how to pull attributes for it from the Xml layout. I don't know, however, how to get any children elements from it. Here's a visual example of what I'm trying to accomplish: public class Menu extends LinearLayout. When my Menu is created, how do I get references to the two MenuItems. Code...
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Dec 22, 2009
I have a requirement to create a control similar to UITabBar in iPhone, which is to be present on every activity of my application. UITabBar essentially is a battery of buttons exhibiting a TAB like behavior: every button maps to an activity. I have two solutions for this: 1. In the layout XML for every activity, I insert a <LinearLayout><Button/><Button/><Button/></LinearLayout> element. And then have a common listener class that will handle the button clicks. So, every activity will have an instance of this listener. 2. To create a custom Widget extending LinearLayout class, put all the buttons as its static members and let it handle the button clicks. Include this custom control in every screen.
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Dec 22, 2009
I have a need to create a control similar to UITabBar in iPhone, which is to be present on every activity of my application. UITabBar essentially is a battery of buttons exhibiting a TAB like behavior: every button maps to an activity. I have two solutions for this: 1. In the layout XML for every activity, I insert a <LinearLayout><Button/><Button/><Button/></LinearLayout> element. And then have a common listener class that will handle the button clicks. So, every activity will have an instance of this listener. 2. To create a custom Widget extending LinearLayout class, put all the buttons as its static members and let it handle the button clicks. Include this custom control in every screen. I am not sure which approach to follow.
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May 12, 2014
I am looking for a code-heavy way of controlling an android phone with scripts. For example, can you hook your android up to your PC and then control it virtually as if you were doing everything with your finger using scripts?
In my mind I imagine the code would look something like this (this is fake code):
1. var i = 30px;
2. Touch the screen at coordinates x, y;
3. Scroll to cords x, y minus i;
4. Touch the screen at cords x, y;
5. Swipe to cords x + 80, y;
6. Single click cords x, y;
7. if (cords x, y = rgb(0, 0-255,0) { //aka a shade of green
8. var count = count++ }
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Sep 30, 2009
I'm trying to compile an app via Android 1.6, and got errors shown below. It said some strings in TextView and Button are not localized. I know how to fix them. It's easy to add them to strings.xml. But I still doubt why I need to localize every string. I don't think the strings like '1024' (pure number) or '80 x 25' need to be localized. Can't I set some strings to be non-localized? I searched SDK 1.6 documents, but can't find any help.
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Feb 19, 2013
I have to develop one android xml parsing use sax .This is my xml feed:
[HIGH]<root>
<Categories>
<Category name="book">
<Articles>
<article articleid="170" title="java programming">
<thumb_image>
[code]...
how can i get the image url from thumb_image tag alone.
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Jun 3, 2009
I finally decided to use styles and themes instead of tediously setting attributes for each individual view. I was able to get the style to work when I set it on android:textAppearance, but when I try to just set it right on the style attribute like below, it no longer applies.This is happening to me for Buttons as well as TextViews. What I want is to be able to have a few different styles for text views and buttons and then just set the style on each button or text view.The style will need to define textSize, textColor, background and maybe a few others.Since background and some other things are not textAppearance,I need to use the general style attribute.
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Aug 15, 2009
Can anyone tell ,what are the steps to add a new attribute for ViewGroup.I added a attr in framework/core/res/value/attr.xml under"<declare-styleable name="ViewGroup">" but its not reflecting in R.java after building.
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Jul 2, 2010
Is there an easy way to grab a attribute value from an xml item in your Java class definition?I know you can grab similar xml attributes from the converted objects using getters/setters like View.getText().I'm just wondering if there's a way to grab an xml attribute right from the item itself.
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Sep 7, 2013
I set the tag attribute on a custom widget in my layout XML:
Code:
<com.louisvillemade.thegirlyapp.widgets.GirlySeekBar
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="40dp"
android:layout_marginRight="40dp"
android:layout_marginBottom="16dp"
android:gravity="center"
android:layout_gravity="center"
android:max="19"
android:tag="attr_2"
android:progress="0"
[code]....
How do I grab some of the XML elements, like the android:tag element (set to "attr_2") through reflection of seekBar? Calling seekBar.getTag() returns null and I can't seem to find any methods on the Drawable that will give me what I want.
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Aug 13, 2009
This question is about setting the "style" attribute programmatically, but it needs a bit of background first. I wish to create a custom component which will looks like a EditText box but not actually allow direct input. (When focused or touched it will pop up a dialog to allow data to be entered).
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Apr 19, 2010
I was wondering how to assign a style via code in adroid.suppose I have a TextView created with the following snippet:TextView myText = new TextView(this).
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Feb 10, 2009
I have attribute "attr1" defined for my views A, B, C. A and B are actually ViewGroups. Let's say C is contained in B and B in A. Is there an existing mechanism in Android framework that allows me to specify the value of attr1 in A and have it automatically propagated to B and C?
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May 5, 2009
There's a "password" attribute in the xml file, but i want set the password attribute through the code. actually,In my project all Views are generated on the fly. do not using the xml files.
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May 13, 2009
Is it possible to dynamically set the drawSelectorOnTop attribute on a Spinner instead of having to do it in the layout XML?
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Jan 1, 2010
I am using SAXParser to parse an html page (any better solution?) and have this exception:
W/System.err( 1358): org.apache.harmony.xml.ExpatParser $ParseException: At line 1, column 59: not well-formed (invalid token)
I have reduced the page to this:
<div id="submenu"><a href="/compte/console.pl? id=382730&idt=1cf6b94aa1a4cf84"></a></div>
And what causes the exception is the '&' inside the href attribute value.
Here is a minimalist test code:
DefaultHandler emptySaxHandler = new DefaultHandler() {};
String xmlstr = "<div id="submenu"><a href="/compte/console.pl?id=382730&idt=1cf6b94aa1a4cf84"></a></div>";
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
saxParser.parse(new ByteArrayInputStream(xmlstr.getBytes ()),emptySaxHandler);
Is this a normal behaviour or kind of bug? If normal, what should do to preprocess the string before parsing?
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Mar 29, 2010
I was wondering if it is possible to use a similar approach to change the style attribute of an element using the same (or similar) technique.Or, if that is not possible, how can the style attribute be changed during runtime (there is no such thing as button.setStyle(R.style.button)).
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Jan 6, 2010
I would like to set a "style" for the button how can I do that in java since a want to use several style for each button I will use.
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Aug 28, 2010
Is there XML attribute that does the exact opposite of android:dependency? What I would like the dependent preference to be enabled when the other is not checked and disabled when it is checked. Maybe the issue isn't with android:dependency maybe there is an xml attribute that I can add to make the default for that preference disabled and then android:dependency will toggle it the opposite way like I want. I tried setting android:enabled="false" in the preference and it disables it like I want but even with it being dependent on the other preference it didn't enable it like I had hoped.
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Nov 15, 2010
My attribute value is coming in html tag .can any body tell how to parse the value.
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Oct 16, 2009
I have the following case. I have two string xml files under the dir of res/values and res/values- small. The strings in the two files are used to describe the different activity attribute. But i found that when i run my apk on QVGA emulator, the system always get the string value from res/values.
Here is my example:
CODE:.................
When i run my apk on QVGA emulator, i found that the system always get the values from res/values/config.xml. Thus i want to know if Android support to use resource to describe the activity attribute.
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Feb 15, 2009
I get the following error in logcat: java.lang.RuntimeException: Binary XML file line #26: You must supply a layout_height attribute. Can you please tell me which xml file that I am missing? And it said 'binary xml', does it mean it is actually line 26 in my file? or it is line 26 in the file after it compiles to be a binary xml file?..........
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Nov 18, 2010
It looks like the naming style for android attributes varies between underscore and camel case. Does the variation mean anything, or is it arbitrary? edit: examples would be layout_width and columnWidth.
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