Develop Reference

Android: My spinner is not being displayed as expected

Here is all of the code that I am using to create my spinner. This is what I am expecting the spinner to look like:
Instead I am just getting a spinner that does not have the drop down arrow and it is just a brown box.
<style name="spinner_style">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">wrap_content</item>
<item name="android:background">#drawable/gradient_spinner</item>
<item name="android:layout_margin">10dp</item>
<item name="android:paddingLeft">8dp</item>
<item name="android:paddingRight">20dp</item>
<item name="android:paddingTop">5dp</item>
<item name="android:paddingBottom">5dp</item>
<item name="android:popupBackground">#DFFFFFFF</item>
</style>
Spinner
<Spinner
android:layout_width="300dp"
android:layout_height="wrap_content"
android:id="#+id/spinner"
android:spinnerMode="dropdown"
android:layout_alignTop="#+id/buttonWednesday"
android:layout_centerHorizontal="true"
style="#style/spinner_style"/>
Drawable
<item><layer-list>
<item><shape>
<gradient android:angle="90" android:endColor="#B3BBCC" android:startColor="#E8EBEF" android:type="linear" />
<stroke android:width="1dp" android:color="#000000" />
<corners android:radius="4dp" />
<padding android:bottom="3dp" android:left="3dp" android:right="3dp" android:top="3dp" />
</shape></item>
<item ><bitmap android:gravity="bottom|right" android:src="#drawable/spinner_arrow" />
</item>
</layer-list></item>

How to change default button style in Android?

I want to change the style of the Button. And I add the style in style.xml then set the #style/BaseButton to every Button.
Is there any way can do it better? Can I just set the theme to change all Button or other views?
I know that I can add the theme to the style.xml but unfortunately, if I set the attributes like #android:background to the Button, other views' backgrounds are set too.
So here are what I need:
Set the style in only one(or some) place(s). No need to set style in
every layout and every <Button />.
Only the Button is influenced while other views stay where they
are.
Can be changed easily.

Follow below steps
Create an XML file that represents the button states
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_enabled="false"
android:drawable="#drawable/button_disabled" />
<item
android:state_pressed="true"
android:state_enabled="true"
android:drawable="#drawable/button_pressed" />
<item
android:state_focused="true"
android:state_enabled="true"
android:drawable="#drawable/button_focused" />
<item
android:state_enabled="true"
android:drawable="#drawable/button_enabled" />
</selector>
Create an XML file that represents each button state
First button shape is for the enabled button state.
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient
android:startColor="#00CCFF"
android:centerColor="#0000CC"
android:endColor="#00CCFF"
android:angle="90"/>
<padding android:left="7dp"
android:top="7dp"
android:right="7dp"
android:bottom="7dp" />
<stroke
android:width="2dip"
android:color="#FFFFFF" />
<corners android:radius= "8dp" />
</shape>
Second button shape is for the focused button state.
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient
android:startColor="#F7D358"
android:centerColor="#DF7401"
android:endColor="#F7D358"
android:angle="90"/>
<padding android:left="7dp"
android:top="7dp"
android:right="7dp"
android:bottom="7dp" />
<stroke
android:width="2dip"
android:color="#FFFFFF" />
<corners android:radius= "8dp" />
</shape>
Third button shape is for the pressed button state.
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient
android:startColor="#0000CC"
android:centerColor="#00CCFF"
android:endColor="#0000CC"
android:angle="90"/>
<padding android:left="7dp"
android:top="7dp"
android:right="7dp"
android:bottom="7dp" />
<stroke
android:width="2dip"
android:color="#FFFFFF" />
<corners android:radius= "8dp" />
</shape>
And finally, Fourth button shape is for the disabled button state.
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient
android:startColor="#F2F2F2"
android:centerColor="#A4A4A4"
android:endColor="#F2F2F2"
android:angle="90"/>
<padding android:left="7dp"
android:top="7dp"
android:right="7dp"
android:bottom="7dp" />
<stroke
android:width="2dip"
android:color="#FFFFFF" />
<corners android:radius= "8dp" />
</shape>
Create an XML file that represents the button style
<resources>
<style name="button" parent="#android:style/Widget.Button">
<item name="android:gravity">center_vertical|center_horizontal</item>
<item name="android:textColor">#FFFFFFFF</item>
<item name="android:shadowColor">#FF000000</item>
<item name="android:shadowDx">0</item>
<item name="android:shadowDy">-1</item>
<item name="android:shadowRadius">0.2</item>
<item name="android:textSize">16dip</item>
<item name="android:textStyle">bold</item>
<item name="android:background">#drawable/button</item>
<item name="android:focusable">true</item>
<item name="android:clickable">true</item>
</style>
Create an XML with your own custom application theme .themes.xml below
<resources>
<style name="YourApplicationTheme" parent="android:style/Theme.NoTitleBar">
<item name="android:buttonStyle">#style/button</item>
</style>
</resources>
Now, you can create buttons on your application with the new style

Use this
<style name="ApplicationStyle" parent="android:Theme">
<item name="android:buttonStyle">#style/CKButton</item>
</style>
Linked from:
How do I apply a style to all buttons of an Android application

Style file to add border to all buttons?

How can I make a style file that adds borders to all buttons? All buttons already have a background image.

Create your style in file res/values/styles.xml
<style name="KeyBoardButton">
<item name="android:layout_width">0dp</item>
<item name="android:layout_height">match_parent</item>
<item name="android:layout_weight">1</item>
<item name="android:gravity">center</item>
<item name="android:layout_margin">4dp</item>
<item name="android:paddingTop">8dp</item>
<item name="android:paddingBottom">8dp</item>
<item name="android:textAppearance">?android:attr/textAppearanceMedium</item>
<item name="android:textColor">#555</item>
<item name="android:background">#drawable/button_border</item>
</style>
Define the border that will be used in file res/drawable/button_border.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:radius="4dp"/>
<solid
android:color="#d5cbc6" />
<stroke
android:width="2dp"
android:color="#dedede" />
</shape>
</item>
<item>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:radius="4dp"/>
<solid
android:color="#f9f9f9" />
<stroke
android:width="2dp"
android:color="#dedede" />
</shape>
</item>
Now you can use it in your layout files, as follows:
<Button android:id="#+id/my_button"
style="#style/KeyBoardButton"
android:text="1" />

How to integrate old android styles into titanium alloy

i am converting one of my android apps into titanium alloy, I have some selector xml for buttons which are kept in res/drawable folder(custom_btn_genoa.xml), shown below:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true" >
<shape android:shape="rectangle" >
<corners android:radius="3dip" />
<stroke android:width="1dip" android:color="#20534e" />
<gradient android:angle="-90" android:startColor="#062d30" android:endColor="#4c898e" />
</shape>
</item>
<item android:state_focused="true">
<shape android:shape="rectangle" >
<corners android:radius="3dip" />
<stroke android:width="1dip" android:color="#20534e" />
<solid android:color="#125156"/>
</shape>
</item>
<item >
<shape android:shape="rectangle" >
<corners android:radius="3dip" />
<stroke android:width="1dip" android:color="#20534e" />
<gradient android:angle="-90" android:startColor="#4c898e" android:endColor="#125156" />
</shape>
</item>
</selector>
Then my buttons styles (values/styles.xml)
<style name="btnStyleGenoa" parent="#android:style/Widget.Button">
<item name="android:textSize">15sp</item>
<item name="android:textStyle">bold</item>
<item name="android:textColor">#FFFFFF</item>
<item name="android:gravity">center</item>
<item name="android:shadowColor">#000000</item>
<item name="android:shadowDx">1</item>
<item name="android:shadowDy">1</item>
<item name="android:shadowRadius">0.6</item>
<item name="android:background">#drawable/custom_btn_genoa</item>
<item name="android:padding">10dip</item>
</style>
In titanium i can set the textsize, color, and so forth, but how can i implement the selector xml stuff in titanium alloy easily?

The conversion from Android styles to Titanium is not one to one, it is meant to be generally applicable to multiple platforms (iOS, Android, Windows, Blackberry). In this case (if you are trying to emulate a button selector) this is built in to Titanium, here is an approximation of the selector to Alloy xml for what you have:
<Alloy>
<Button id="button" title="Hello"
top="10" width="100" height="50"
color="#FFF"
backgroundFocusedColor="#125156"
backgroundColor="#125156"
backgroundSelectedColor="#4c898e"/>
</Alloy>
The backgroundFocused and Selected each specify different images or colors to use when a user interacts with the button.

Android button select and press drawable

I'm trying to make a button with state press and select,
I already did the same with tabs and it works but I don't know why here does not work.
I have done it like this:
button_sel.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient android:startColor="#color/azulado"
android:endColor="#color/azulBrillante"
android:angle="270" />
<corners android:radius="#dimen/corner_radius" />
<stroke android:width="2px"
android:color="#color/blanco" />
</shape>
button_unsel.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient android:startColor="#color/botonesD"
android:endColor="#color/botones"
android:angle="270" />
<corners android:radius="#dimen/corner_radius" />
<stroke android:width="2px"
android:color="#color/blanco" />
</shape>
And the selector, button.xml:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/button_sel"
android:state_selected="true"
android:state_pressed="true"/>
<item android:drawable="#drawable/button_unsel"
android:state_selected="false"
android:state_pressed="false"/>
</selector>
And here I call the drawable as a background:
<style name="button">
<item name="android:background">#drawable/button</item>
<item name="android:textSize">#dimen/text_size</item>
<item name="android:padding">#dimen/padding_button</item>
<item name="android:textColor">#color/blanco</item>
</style>
Thank you!!!!

The first item in your selector is only used, when the button is pressed AND selected. If you want to use button_sel when your button is pressed OR selected, you should do something like this:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/button_sel" android:state_selected="true" />
<item android:drawable="#drawable/button_sel" android:state_pressed="true" />
<item android:drawable="#drawable/button_unsel" />
</selector>
The items are evaluated from top to bottom, the last one is the default. Though I am not sure if state_selected makes sense for buttons.

Can use shape inline item.
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" >
<shape....>
</item>
<item android:state_selected="true" >
<shape....>
</item>
<item android:state_pressed="true" android:state_selected="true" >
<shape...>
</item>
</selector>
For sample :
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true" >
<shape
android:shape="rectangle">
<gradient android:startColor="#color/md_amber_300"
android:endColor="#color/md_amber_50"
android:angle="270" />
<corners android:radius="#dimen/fab_margin" />
<stroke android:width="2px"
android:color="#color/primaryColorDark_orange" />
</shape>
</item>
<item android:state_pressed="true" >
<shape
android:shape="rectangle">
<gradient android:startColor="#color/md_amber_300"
android:endColor="#color/md_amber_50"
android:angle="270" />
<corners android:radius="#dimen/fab_margin" />
<stroke android:width="2px"
android:color="#color/primaryColorDark_orange" />
</shape>
</item>
<item android:state_pressed="true" android:state_selected="true" >
<shape
android:shape="rectangle">
<gradient android:startColor="#color/md_teal_500"
android:endColor="#color/md_blue_400"
android:angle="270" />
<corners android:radius="#dimen/fab_margin" />
<stroke android:width="2px"
android:color="#color/md_amber_A400" />
</shape>
</item>
</selector>