I want to use a list selector for my gridview. I add it in xml via the android:listSelector attribute.
My selector looks like that:
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true" android:drawable="#drawable/selected_item_highlight" />
<item android:state_focused="true" android:drawable="#drawable/selected_item_highlight" />
<item android:drawable="#android:color/transparent" />
</selector>
where the selected_item_highlight looks like that:
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:radius="3dp" />
<solid
android:background="#color/ListHighlighting" />
</shape>
But the grid keeps blank. When I change the drawable attribute in the selector to drawable="#color/ListHighlighting" the whole grid - every item - get's highlighted in the color.
What's wrong?
Related
Having defined drawable with given png for each items in the drawable for different states, if want to having border around the png for that item, how to do it? re-cut the png is not option here.
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:state_focused="true"
android:drawable="#drawable/box_checked_png” />
<item android:state_checked="false" android:state_focused="true"
android:drawable="#drawable/white_box_png” />
<item android:state_checked="false"
android:drawable="#drawable/white_box_png” />
<item android:state_checked="true"
android:drawable="#drawable/box_checked_png” />
</selector>
The method which i find best is to add a background to the check box.
This is a rectangle drawable background.xml (put into res/drawable folder).
Let's say you are making a shape like this one :
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<solid android:color="#ffffff" />
<stroke android:width="1dip" android:color="#4fa5d5"/>
</shape>
And where you have your check box, you just set the background made before:
<CheckBox android:text="Some me" android:background="#drawable/background"/>
Newbie in Android.
I have the following defined in res/drawable/ for a button in a menu that's defined in style.xml
<style name="menu_icon">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">#dimen/menu_item_height</item>
<item name="android:background">#drawable/menu_item_bg_sel</item>
</style>
Now, menu_item_bg_sel in drawable has two different color gradients for 2 states that I am interested in- pressed and selected.
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<layer-list>
<item>
<shape>
<gradient android:angle="180"
android:endColor="#color/background_menu_gray_selected2"
android:centerColor="#color/background_menu_gray_selected1"
android:startColor="#color/background_menu_gray_selected" />
</shape>
</item>
</layer-list>
</item>
<item android:state_selected="true">
<layer-list>
<item>
<shape>
<gradient android:angle="180" android:endColor="#color/background_menu_home2"
android:centerColor="#color/background_menu_home1"
android:startColor="#color/background_menu_home" />
</shape>
</item>
</layer-list>
</item>
<item android:drawable="#color/transparent"/>
However, when I press the button (that transient state) the button still creates the gradient taking colors from the selected_state only.
What am I doing wrong? Any ideas?
state_selected is commonly used when navigating using d-pads or maybe a pen like what Samsung Notes so I suggest not to use state_selected since when you press automatically it will be selected or gain focus although selected and focus are kind or different. I suggest to use state_pressed, state_focused and state_hovered instead.
For more info click here
You can use this code. You can copy paste this code into one drawable file. You can assign different drawable files or define shapes in this file itself for the different states.I have assigned a drawable file for the focused state as an example.
simple_button_states.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_focused="true"
android:drawable="#drawable/rounded_edittext_focused"
/>
<!--pressed -->
<item
android:state_pressed="true" />
<!--selected -->
<item
android:state_selected="true" />
<!-- focused -->
<item
android:drawable="#drawable/rounded_edittext_unfocused"/>
</selector>
round_edittext_focused.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
>
<solid android:color="#FFFFFF" />
<stroke
android:width="2dp"
android:color="#color/CornflowerBlue" />
<corners
android:topLeftRadius="4dp"
android:topRightRadius="4dp"
android:bottomLeftRadius="4dp"
android:bottomRightRadius="4dp"
/>
</shape>
Finally assign the background of the actual button as the drawable file that you have declared above.
<Button
android:layout_width="150dp"
android:layout_height="wrap_content"
android:background="#drawable/simple_button_states"
/>
Hope this helps
I have a list where I have defined my own list view items with a custom layout. This layout has a background with a custom drawable.
My custom layout for the ListView item:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/item"
android:clickable="true"
android:focusable="true"
android:focusableInTouchMode="true" >
...
</RelativeLayout>
My custom drawable item.xml:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- background: shadow -->
<item>
<shape
android:dither="true"
android:shape="rectangle" >
<corners android:radius="2dp" />
<solid android:color="#color/itemShadowColor" />
</shape>
</item>
<!-- foreground: surface -->
<item android:bottom="2dp">
<shape
android:dither="true"
android:shape="rectangle" >
<corners android:radius="2dp" />
<solid android:color="#color/itemBackgroundColor" />
</shape>
</item>
</layer-list>
Now this item is not clickable anymore.
Can you explain me why, and what I have to do to have the same behavior (selector with the blue background) like a button click?
Define a selector with its pressed and default states in res/drawable folder(one of the state will be your #drawable/item). Set it as the bg of your list row layout.
See similar question and answer :Selector on background color of TextView
Edit:
Best way to understand and apply something like google did is, to look into SDK and do similar things to that. For instance look at the btn_default_holo_dark drawable. It is a selector with states and yes it is a xml.
This is a selector taken from sdk (sdk\platforms\android-18\data\res\drawable\btn_default_holo_dark.xml)
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_window_focused="false" android:state_enabled="true"
android:drawable="#drawable/btn_default_normal_holo_dark" />
<item android:state_window_focused="false" android:state_enabled="false"
android:drawable="#drawable/btn_default_disabled_holo_dark" />
<item android:state_pressed="true"
android:drawable="#drawable/btn_default_pressed_holo_dark" />
<item android:state_focused="true" android:state_enabled="true"
android:drawable="#drawable/btn_default_focused_holo_dark" />
<item android:state_enabled="true"
android:drawable="#drawable/btn_default_normal_holo_dark" />
<item android:state_focused="true"
android:drawable="#drawable/btn_default_disabled_focused_holo_dark" />
<item
android:drawable="#drawable/btn_default_disabled_holo_dark" />
</selector>
These are the images taken from sdk (sdk\platforms\android-18\data\res\drawable-xhdpi):
When you apply this drawable/selector (#drawable/btn_default_holo_dark) to any view, you are going to have its states. I hope this sample makes my answer more clear.
I'm trying to assing a color selector to an extended class of LinearLayout, so, i think its like if we speak about linearLayout.
i followed the instructions on this post, the answer talking about shapes.
Now i have 3 xml on drawables folders:
normal.xml file
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<solid android:color="#ffffffff" />
</shape>
pressed.xml file
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<solid android:color="#00000000" />
</shape>
and finally, bg.xml file
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="#drawable/pressed" />
<item android:state_focused="true" android:drawable="#drawable/pressed" />
<item android:state_selected="true" android:drawable="#drawable/pressed" />
<item android:drawable="#drawable/normal" />
</selector>
I am accessing this in the following way:
Drawable d = getResources().getDrawable(context.getResources().getIdentifier("mypackageuri.tProject:drawable/bg", null, null));
view.setBackgroundDrawable(d);
The "normal" state its fine, with the color set at "normal.xml", but no way with the other ones, I press my view and nothing happens, it's not changing color in any way...
I can't see what i'm doing wrong...
Thank you
Your view needs to be clickable in order to get the state pressed when you click on it.
Use :
view.setClickable(true);
or in the layout xml :
android:clickable="true"
I need to style ListView and can't figure out why It turns to black background when scroll.. I have ListView inside LinearLayout and that layout has Background set to image.
This is what I have for ListView:
<style name="MyListView" parent="#android:style/Widget.ListView">
<item name="android:listSelector">#drawable/selector_list_item</item>
</style>
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false" android:state_focused="true"
android:drawable="#drawable/shape_list_item_normal" />
<item android:state_pressed="true"
android:drawable="#drawable/shape_list_item_pressed" />
<item android:state_focused="true"
android:drawable="#drawable/shape_list_item_normal" />
</selector>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient android:startColor="#80ffffff" android:endColor="#80eff3ef" android:angle="45" />
<padding android:left="5dip" android:right="5dip" android:top="7dip" android:bottom="7dip"/>
</shape>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient android:startColor="#80808080" android:endColor="#80eff3ef" android:angle="45" />
<padding android:left="5dip" android:right="5dip" android:top="7dip" android:bottom="7dip"/>
</shape>
When I apply MyListView style I don't see much happening. When I click on item - yes, I see gradient. When ListView stable - I see background as it should be from parent layout. When I scroll - I see black background, it's erasing parent's background. And I would be fine with that if I knew how to set it with something else..
Use the following property in the xml of listView:
android:cacheColorHint="#android:color/transparent"
Try this line of code in the xml of your listview:
android:listSelector="#android:color/transparent"
If you require transparent ListView in a PreferenceActivity, try using a theme with
<resources>
<style name="MyPreferencesTheme">
<item name="android:scrollingCache">false</item>
</style>
</resources>
And put the theme in your AndroidManifest.xml
<activity
android:name="YourActivity"
android:theme="#style/MyPreferencesTheme">
</activity>