Develop Reference

How to use default android themes?

Hy
I created an android project, and I saw thet, tehe are two themes.xml file. In emulator, when I switch day and night mode, my application color schema is changes too.
I thought it is greate, because with thease themes it will be easy to create a day/night app, but I don't know how it works.
How can I define a new color item inside themes, and use this schema for layout background?
For example: There is an item in both themes
<item name="colorPrimary">#303F9F</item>
And I would like to create a new item for both themes.xml, and use it to set up fragment background color, but the intellisense doesn't find this element directly.
<item name="backgroundColor">#303F9F</item>

You can change color easily from where you define your theme in 'styles.xml'.
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
<style name="AppThemeDark" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorSecondary</item>
<item name="colorPrimaryDark">#color/colorSecondaryDark</item>
<item name="colorAccent">#color/colorSecondaryAccent</item>
</style>
I have two themes in my app so if i change the color or anything in my theme i will define that color in my selected theme for example:
i want to change the background color of 'AppThemeDark' i just define the color like this
<item name="background">#color/"#fff67"</item>

copy this line in your first screen
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);

Ok In constraintlayout background tag is not worked so I will fix this problem with the use of View.
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#AAA">
<View
android:id="#+id/background"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#FFF"
app:layout_constraintBottom_toBottomOf="#+id/textView3"
app:layout_constraintEnd_toEndOf="#+id/textView1"
app:layout_constraintStart_toStartOf="#+id/textView1"
app:layout_constraintTop_toTopOf="#+id/textView1" />
<TextView
android:id="#+id/textView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:padding="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:text="TextView" />
<TextView
android:id="#+id/textView2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:padding="8dp"
app:layout_constraintEnd_toEndOf="#+id/textView1"
app:layout_constraintStart_toStartOf="#+id/textView1"
app:layout_constraintTop_toBottomOf="#+id/textView1"
tools:text="TextView" />
<TextView
android:id="#+id/textView3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:padding="8dp"
app:layout_constraintEnd_toEndOf="#+id/textView1"
app:layout_constraintStart_toStartOf="#+id/textView1"
app:layout_constraintTop_toBottomOf="#+id/textView2"
tools:text="TextView" />
</android.support.constraint.ConstraintLayout>

Android - Setting default style for EditText view is not working

I am trying to set default style for edit text view. In this example, I have set default style for editText as well as for textView.
Here is my styles.xml from values folder:
<resources>
<style name="AppBaseTheme" parent="Theme.AppCompat.Light">
</style>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
<item name="android:editTextStyle">#style/AppTheme.EditText</item>
<item name="android:textViewStyle">#style/AppTheme.TextView</item>
</style>
<style name="AppTheme.EditText" parent="android:Widget.EditText">
<item name="android:textColor">#color/red</item>
<item name="android:padding">10dp</item>
</style>
<style name="AppTheme.TextView" parent="android:Widget.TextView">
<item name="android:textColor">#color/red</item>
<item name="android:padding">10dp</item>
</style>
</resources>
As shown in the snapshots below, I have added two editText and two textView in layout.
Here is my layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="TextView1" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textView1"
android:layout_marginTop="20dp"
android:text="TextView2" />
<EditText
android:id="#+id/editText1"
style="#style/AppTheme.EditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/textView2"
android:layout_marginTop="20dp"
android:ems="10"
android:text="EditText1" >
</EditText>
<EditText
android:id="#+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/editText1"
android:layout_marginTop="20dp"
android:ems="10"
android:text="EditText2" >
</EditText>
</RelativeLayout>
Now the issue is, default style for textView works fine but for editText view it does not reflect the style. If I explicitly set style for editText then it reflects as expected (as done for editText1), but not by default. Text color for editText2 should be red but it's not. Am I missing something?

Hi prashant..just i copied your code in my project. for me its working
do you want like this? or anything else?

Stylizing material buttons in Android v21

I am trying to maintain the material design ripple effect for devices with lollipop and above (21+) and stylize the button so that it doesn't have a large margin/space around it.
Example 1: Buttons with ripple effect but with margin/gap:
Example 2: Buttons with NO ripple effect and without the margin/gap:
I want the layout of Exmaple 2 with the ripple effect that is used in Example 1.
What my styles-v21 look like for Example 1 :
<?xml version="1.0" encoding="utf-8"?>
<resources>
... other styles ...
<style name="FacebookButton" parent="android:Widget.Material.Button">
<item name="android:colorButtonNormal">#ff3b5998</item>
<item name="android:layout_margin">0dp</item>
<item name="android:borderlessButtonStyle">#style/Widget.AppCompat.Button.Borderless</item>
</style>
<style name="GoogleButton" parent="android:Widget.Material.Button">
<item name="android:colorButtonNormal">#ffdd4b39</item>
<item name="android:layout_margin">0dp</item>
<item name="android:borderlessButtonStyle">#style/Widget.AppCompat.Button.Borderless</item>
</style>
<style name="TwitterButton" parent="android:Widget.Material.Button">
<item name="android:colorButtonNormal">#ff55acee</item>
<item name="android:layout_margin">0dp</item>
<item name="android:borderlessButtonStyle">#style/Widget.AppCompat.Button.Borderless</item>
</style>
<style name="SkipButton" parent="android:Widget.Material.Button">
<item name="android:colorButtonNormal">#ffdfa800</item>
<item name="android:layout_margin">0dp</item>
<item name="android:borderlessButtonStyle">#style/Widget.AppCompat.Button.Borderless</item>
</style>
</resources>
What my button layout looks like for Example 1:
<Button
android:id="#+id/login_with_facebook"
android:text="#string/login_with_facebook"
android:fontFamily="sans-serif-condensed"
android:textSize="16sp"
android:drawableLeft="#drawable/facebook_icon"
android:drawablePadding="25dp"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_weight="16.88"
android:textColor="#ffffff"
android:gravity="left|center_vertical"
android:paddingLeft="45dp"
android:theme="#style/FacebookButton" />
<Button
android:id="#+id/login_with_google"
android:text="#string/login_with_google"
android:fontFamily="sans-serif-condensed"
android:textSize="16sp"
android:drawableLeft="#drawable/google_icon"
android:drawablePadding="25dp"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_weight="16.88"
android:textColor="#ffffffff"
android:gravity="left|center_vertical"
android:paddingLeft="45dp"
android:theme="#style/GoogleButton" />
<Button
android:id="#+id/twitter_login_button"
android:text="#string/login_with_twitter"
android:fontFamily="sans-serif-condensed"
android:textSize="16sp"
android:drawableLeft="#drawable/twitter_icon"
android:drawablePadding="25dp"
android:layout_height="45dp"
android:gravity="left|center_vertical"
android:layout_width="match_parent"
android:layout_weight="16.88"
android:textColor="#ffffffff"
android:paddingLeft="45dp"
android:theme="#style/TwitterButton" />
<Button
android:id="#+id/login_anonymously"
android:text="#string/login_anonymously"
android:fontFamily="sans-serif-condensed"
android:textSize="16sp"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="50"
android:textColor="#ffffffff"
android:theme="#style/SkipButton" />
Any idea how I can achieve the look of Example 2 while using the ripple methodology I've presented? Any links to resources or help would be appreciated. Thanks.
Extra:
I've already read over the following
Coloring Buttons in Android with Material Design and AppCompat
How to properly style material buttons in android

You can use android:background="?android:attr/selectableItemBackground" to get a rectangular ripple.
Alternatively, you can create your own drawable. Here's the XML for the framework's selectable item background:
drawable/item_background_material.xml:
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?android:attr/colorControlHighlight">
<item android:id="#android:id/mask">
<color android:color="#android:color/white" />
</item>
</ripple>

Number Picker displays numbers out of margin

I've been trying to fix this issue for hours now but it looks like I'm the only one having it.
I shouldn't see the number above and below the blue line. Here is the XML
<android.support.v7.widget.GridLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:useDefaultMargins="true"
android:layout_margin="3dp"
app:columnCount="3"
app:rowCount="7">
........
<NumberPicker
app:layout_column="1"
app:layout_row="3"
android:id="#+id/n_of_dies"
style="#style/inputNumbers"
android:layout_width="wrap_content"
app:layout_gravity="fill_horizontal"
/>
<NumberPicker
app:layout_column="1"
app:layout_row="4"
app:layout_gravity="fill_horizontal"
android:id="#+id/carbon_content"
style="#style/inputNumbers"
android:layout_width="wrap_content"
app:layout_gravity="fill_horizontal"
/>
........
The content of Input numbers is
<style name="inputNumbers">
<item name="android:padding">10dp</item>
</style>
any ideas?

Given the problem is how you're using the paddings I'd recommend to take a look at the widget style (the Holo variation) if you want to change the default look:
...
<style name="Widget.NumberPicker">
<item name="android:internalLayout">#android:layout/number_picker</item>
<item name="android:orientation">vertical</item>
<item name="android:fadingEdge">vertical</item>
<item name="android:fadingEdgeLength">50dip</item>
</style>
...
<style name="Widget.Holo.NumberPicker" parent="Widget.NumberPicker">
<item name="android:internalLayout">#android:layout/number_picker_with_selector_wheel</item>
<item name="android:solidColor">#android:color/transparent</item>
<item name="android:selectionDivider">#android:drawable/numberpicker_selection_divider</item>
<item name="android:selectionDividerHeight">2dip</item>
<item name="android:selectionDividersDistance">48dip</item>
<item name="android:internalMinWidth">64dip</item>
<item name="android:internalMaxHeight">180dip</item>
<item name="virtualButtonPressedDrawable">?android:attr/selectableItemBackground</item>
</style>

Using "android:textAppearance" on TextView/EditText fails, but "style" works

This is a sample TextView in XML, which will properly apply the style TextContactContactName to the TextView.
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/photo"
android:layout_alignTop="#id/photo"
android:paddingLeft="10dp"
android:text="First Last"
style="#style/TextContactContactName"
/>
Now, I have some other things to set on this element, which are not text related. As such I tried to move the TextContactContactName and apply it via "android:textAppearance"
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/photo"
android:layout_alignTop="#id/photo"
android:paddingLeft="10dp"
android:text="First Last"
android:textAppearance=#style/TextContactContactName"
/>
Unluckily, the text formatting is not being applied.
This is how the style (stored in res/values/styles-text.xml) looks like:
<style name="TextContactContactName">
<item name="android:textSize">24sp</item>
<item name="android:textColor">#333333</item>
<item name="android:shadowColor">#ffffff</item>
<item name="android:shadowDx">0</item>
<item name="android:shadowDy">1</item>
<item name="android:shadowRadius">1</item>
</style>
Am I using the textAppearance tag wrong?
I tested on Android 2.2 - HTC Desire.

Ok, looks like my fault. I had made a quick test:
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text styled using 'style'."
style="#style/UiTestTextView"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text styled using 'textAppearance'."
android:textAppearance="#style/UiTestTextView"
/>
and the styles-text.xml:
<style name="UiTestTextView">
<item name="android:textColor">#ff0000</item>
<item name="android:textSize">16sp</item>
<item name="android:shadowColor">#ffffff</item>
<item name="android:shadowDx">1</item>
<item name="android:shadowDy">2</item>
<item name="android:shadowRadius">3</item>
</style>
The key thing is to remember that shadow* elements are not text properties. And as such will not be applied via textAppearance.
I'm going to ask on the Android Developers Mailing list if this is desired behavior.

I filed a bug report on this issue. I think I got the standard reply "the shadow is not considered part of the text appearance".
http://code.google.com/p/android/issues/detail?can=2&start=0&num=100&q=&colspec=ID%20Type%20Status%20Owner%20Summary%20Stars&groupby=&sort=&id=35887