I want to set the text appearance in my theme to be TextAppearnance.Large.
Here is what I am doing in my styles.xml (my application is pointing to this theme in my manifest)
<style name="myTheme" parent="android:Theme.NoTitleBar.Fullscreen">
<item name="android:textAppearance">#android:style/TextAppearance.Large</item>
</style>
Problem:
My text is still being displayed small.
Question(s):
What am I doing wrong in trying to use a predefined TextAppearance in my activity? i.e. How do specify this TextAppearance correctly?
Where are the TextSizes for TextAppearance.Large/Medium/Small defined?
First, declare the attribute as
<item name="android:textAppearance">?android:attr/textAppearanceLarge</item>
But declaring text appearance or text color in a theme only affects text that has absolutely no style or attribute anywhere, including system-defined ones. If you add a
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Medium Text" />
without even the android:textAppearance="?android:attr/textAppearanceMedium" line that Eclipse throws in, it will be affected by this theme, but buttons and the like never will.
themes and styles are defined in the themes.xml and styles.xml files of the sdk implementations in your environment (distinct ones for different android versions or sdk levels).
search your computer for themes.xml (you will probably find multiple instances of it in the "program files/android" folder on a windows 32-bit machine, for example).
this post explains how to customize these attributes.
you can also set explicit size attributes in your xml layout file, by modifying the TextView tag attributes:
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="15sp is the 'normal' size."
android:textSize="15sp"
/>
this post explains how to customize android fonts (including fontType, fontColor, shadow, bold, italic) directly in xml layout file.
Related
I'm trying to build an Android UI via layouts. I start with the following:
<TextView
android:id="#+id/..."
android:layout_marginTop="8dip"
android:text="..."
style="?android:attr/listSeparatorTextViewStyle"/>
And that looks good (all caps, smaller font, dividing bar underneath it). Now I want to extend the style, so I change it to the following:
<TextView
android:id="#+id/..."
android:layout_marginTop="8dip"
android:text="..."
style="#style/section_title"/>
With a style of:
<style name="section_title" parent="#android:attr/listSeparatorTextViewStyle">
<item name="android:layout_width">fill_parent</item>
<item name="android:layout_height">wrap_content</item>
</style>
And that doesn't work (font is correct, but the divider line is gone).
How come... that?
When you're using:
style="?android:attr/listSeparatorTextViewStyle"
you're using the style pointed by this attribute(listSeparatorTextViewStyle). If you look in the platform themes.xml you'll see that the style that is actually used for this attribute is Widget.TextView.ListSeparator.White. So this is the style you should extend in your custom style.
Unfortunately that style is private and you can't extend it, or you shouldn't extend it(for reference, see this bug report from google). Your best option would be to copy that entire style, Widget.TextView.ListSeparator.White(Widget.TextView.ListSeparator isn't public as well so would have to also copy that), in your custom style and use that instead of extending the style from the android platform(see this response from the link above).
I'm having trouble setting a theme on individual views in one of my activities.
Setting the theme in the application tag in my manifest works perfectly, as does setting the theme in the activity tags in the manifest.
Regardless of whether I have a theme set in the manifest or not, if I try and set a theme on an individual view:
<TextView
android:id="#+id/userFullNameTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="5dp"
android:layout_toRightOf="#+id/profileImageView"
android:text="Bobby Joe"
android:textAppearance="?android:attr/textAppearanceMedium"
android:theme="#style/Theme.Sherlock.Light" />
the view always appears with either the default theme (nothing set in manifest) or the same theme specified in the manifest.
I'm not overriding the Theme.Sherlock.Light theme anywhere in my xml files. I've tried several different combinations of themes to no avail. Oh, and I'm obviously using ActionBarSherlock.
EDIT
If I create a new style:
<style name="SideMenuStyle" parent="Theme.Sherlock.Light" >
</style>
and use this style in my xml, it still does not display the correct style.
There's no android:theme xml attribute defined for views. You can use style xml attribute instead, but you have to reference a style for the view instead of the whole theme.
Use it like this:
<TextView
android:id="#+id/userFullNameTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="5dp"
android:layout_toRightOf="#+id/profileImageView"
android:text="Bobby Joe"
android:textAppearance="?android:attr/textAppearanceMedium"
style="#style/MyTextViewStyle" />
Note that you can also define a default theme for all instances of TextView or any other widget within the scope of a theme. For TextView that would mean to define android:textViewStyle in the theme:
<style name="MyTheme" parent="#style/Theme.Sherlock">
<item name="android:textViewStyle">#style/MyTextViewStyle</item>
</style>
I'm trying to build an Android UI via layouts. I start with the following:
<TextView
android:id="#+id/..."
android:layout_marginTop="8dip"
android:text="..."
style="?android:attr/listSeparatorTextViewStyle"/>
And that looks good (all caps, smaller font, dividing bar underneath it). Now I want to extend the style, so I change it to the following:
<TextView
android:id="#+id/..."
android:layout_marginTop="8dip"
android:text="..."
style="#style/section_title"/>
With a style of:
<style name="section_title" parent="#android:attr/listSeparatorTextViewStyle">
<item name="android:layout_width">fill_parent</item>
<item name="android:layout_height">wrap_content</item>
</style>
And that doesn't work (font is correct, but the divider line is gone).
How come... that?
When you're using:
style="?android:attr/listSeparatorTextViewStyle"
you're using the style pointed by this attribute(listSeparatorTextViewStyle). If you look in the platform themes.xml you'll see that the style that is actually used for this attribute is Widget.TextView.ListSeparator.White. So this is the style you should extend in your custom style.
Unfortunately that style is private and you can't extend it, or you shouldn't extend it(for reference, see this bug report from google). Your best option would be to copy that entire style, Widget.TextView.ListSeparator.White(Widget.TextView.ListSeparator isn't public as well so would have to also copy that), in your custom style and use that instead of extending the style from the android platform(see this response from the link above).
here's my issue. I have defined custom themes and styles, so as to customize various Views, in the relevant .xml files. Here are some code extracts:
themes.xml:
...
<style name="Legacy" parent="android:Theme.NoTitleBar">
<item name="android:buttonStyle">#style/Legacy.Button</item>
...
</style>
styles.xml:
...
<style name="Legacy.Button" parent="#android:style/Widget.Button">
<item name="android:textColor">#ffffff</item>
<item name="android:background">#drawable/button_selector_blue</item>
<item name="android:textSize">15dp</item>
</style>
Let's say I set my application's theme to Legacy. If I use a Button in a layout, it will get my custom default parameters (white text, background is #drawable/button_selector_blue, etc).
Now let's say I want to keep those parameters save for the text size: I'd like to have some buttons with a larger text size, which would be defined in an titleSize attribute in attrs.xml:
...
<attr name="titleSize" format="reference|dimension" />
and which value is set for each theme in my themes.xml file.
So my layout would contain something like:
<Button
android:id="#+idmyButtonId"
android:drawableRight="#drawable/aDrawable"
android:text="#string/someText"
android:textSize="?titleSize"
android:layout_width="fill_parent" android:layout_height="wrap_content">
</Button>
When launching my app I get the following error:
java.lang.UnsupportedOperationException: Can't convert to dimension: type=0x2
So it seems I cannot tweak custom styles using attributes - at least not this way. Is such a thing possible ? If not, what would you use to achieve such a result ?
I'd like to give the user the ability to select among different themes, so I can't just define an additionnal ButtonWithLargeText style and directly use it in my layout.
Thanks for your help !
I finally got it to work. Instead of defining my titles' size in attrs.xml, I used dimens.xml. So now the following works:
<Button
android:id="#+idmyButtonId"
android:drawableRight="#drawable/aDrawable"
android:text="#string/someText"
android:textSize="#dimen/titleSize"
android:layout_width="fill_parent" android:layout_height="wrap_content">
</Button>
While I get my regular text size (which I defined in my styles.xml) on the Button by using this:
<Button
android:id="#+id/idRegularButton"
android:text="#string/regularSizeText"
android:layout_width="wrap_content" android:layout_height="wrap_content">
</Button>
I've been searching the solution for hours: how to apply a simple theme or style to an application, an activity or just a view? It seems super easy but my styles always get ignored.
Here is the code in style.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="master" parent ="#android:style/Theme.NoTitleBar">
<item name="android:typeface">serif</item>
<item name="android:textColor">#8b8378</item>
</style>
</resources>
and here is the code in AndroidManifest.xml:
<application android:icon="#drawable/icon"
android:label="#string/app_name"
android:theme="#style/master">
and code in a ListView
<ListView android:layout_height="wrap_content"
style="#style/master"
android:id="#+id/list"
android:layout_width="fill_parent">
</ListView>
NOTHING ever happens. Font style, color all remain the default. Only by declare the attributes explicitly like
<TextView android:gravity="center" android:typeface="serif" android:textColor="#8b7d6b" android:textAppearance="?android:attr/textAppearanceSmall" android:id="#+id/text_intro" android:layout_height="wrap_content" android:text="#string/welcome_text" android:layout_width="wrap_content" android:padding="20sp" android:layout_weight="0"></TextView>
will work. I know eclipse doesn't support preview of theme and style, but they don't work on emulator as well.
Help please! I can't believe I have been stuck with this tiny issue for a week... Thank you in advance!
There are a few things about Android styles and resources at work here.
Android styles are an extremely general facility, and the result is that some configurations are possible but invalid and will be ignored. You've run across a few. :)
When applied to a view, a style will be equivalent to setting those same attributes on that view. Styles do not cascade to child views. typeface and textColor aren't valid on a ListView, so they are ignored. They also aren't going to work on a theme that way, since themes provide default styles for different kinds of views. (Why are invalid attributes silently ignored instead of generating an error? Because as new attributes are added in later platform revisions, older devices should ignore extra attributes that they don't know how to parse for compatibility.)
The best way to accomplish what you're trying to do is likely to be:
Create a style for TextViews. (This shouldn't have a parent that is a theme like your pasted code does.)
Apply that style to the TextView in your list item layout using the style= syntax.