I use an ActionBarSherlock library in my app. I also needed to customize the ActionBar, so I added a custom theme with a background parameter set, like this:
<style name="Widget.Styled.ActionBar" parent="Widget.Sherlock.Light.ActionBar.Solid.Inverse">
<item name="background">#drawable/action_bar_bg</item>
<item name="android:background">#drawable/action_bar_bg</item>
</style>
action_bar_bg drawable is simply a bitmap of tiled squares:
<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:dither="true"
android:src="#drawable/bg_img_actionbar"
android:tileMode="repeat" />
What I want to do next is to set a linear gradient for a whole ActionBar, so it will cover this background. And I have no idea if it's possible and how to do that.
Any help would be appreciated.
There is a type of resource for this, Shape Drawable:
http://developer.android.com/guide/topics/resources/drawable-resource.html#Shape
Related
I have a bottomsheet that has constraint layout as root.How to curve the top edges?
Tried this code but it's not working.
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/cl"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/bottom_sheet_bg"
android:paddingTop="#dimen/dimen_20dp"
android:paddingBottom="#dimen/dimen_20dp"
app:layout_behavior="#string/bottom_sheet_behavior">
bottom_sheet_bg is
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners android:topLeftRadius="#dimen/dimen_20dp"
android:topRightRadius="#dimen/dimen_20dp"/>
<solid android:color="#color/white" />
</shape>
Something to keep in mind is that view structures that an application programmer creates are usually placed into some type of view group enclosure by Android. Let's take a simple app and color the background of the main activity a blue and color the background with the curved top red. This is to better show what is going on.
Here is an image from the layout inspector of Android Studio:
As you can see, the curved top of the background drawable is there but the corners have a white background which is the background of the FrameLayout design_bottom_sheet. This is also true in your app but the background colors of your background and of the FrameLayout are both white, so it appears that the rounded corners are just not there. They are present but are masked by the white of the background of the FrameLayout.
To solve this you can search for the design_bottom_sheet and explicitly change its background to transparent, but it may be better to approach this issue through styles.
In your styles file create the following:
<style name="BottomSheetDialogStyle" parent="Theme.MaterialComponents.DayNight.BottomSheetDialog">
<item name="bottomSheetStyle">#style/BottomSheetModalStyle</item>
</style>
<style name="BottomSheetModalStyle" parent="Widget.Design.BottomSheet.Modal">
<item name="android:background">#drawable/bottom_sheet_bg</item>
</style>
(Your styles may differ, but the concept will still apply.)
In the BottomSheetDialogFragment add the following:
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setStyle(DialogFragment.STYLE_NO_FRAME, R.style.BottomSheetDialogStyle);
}
or just add the setStyle() line if you already have onCreate() defined. This code will prevent the design_bottom_sheet from drawing a background.
This will show the following:
and in the Layout Inspector:
Change the colors to what you need but keep in mind that the color that shows at the corners will now be whatever color shows under the FrameLayout.
Okay so the way I achieved it is simply through the drawables.
rounded_dialog.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#android:color/white"/>
<corners android:topLeftRadius="16dp"
android:topRightRadius="16dp"/>
</shape>
inside res/values/styles.xml
<style name="AppBottomSheetDialogTheme" parent="Theme.Design.Light.BottomSheetDialog">
<item name="bottomSheetStyle">#style/AppModalStyle</item>
</style>
<style name="AppModalStyle" parent="Widget.Design.BottomSheet.Modal">
<item name="android:background">#drawable/rounded_dialog</item>
</style>
and inside the java/kotlin
final BottomSheetDialog dialog = new BottomSheetDialog(getActivity(), R.style.AppBottomSheetDialogTheme));
I have been using the new MaterialButton class. I want different colors on the button when the user clicks the button.
I have been using selector drawables for this purpose since the very beginning, however it doesn't appear to be working on MaterialButton.
<com.google.android.material.button.MaterialButton
android:layout_width="0dp"
android:text="#string/login"
style="#style/Widget.Mohre.Button"
android:layout_height="wrap_content"
app:cornerRadius="#dimen/card_corner_radius"
android:padding="#dimen/unit_large"
android:id="#+id/loginBtn"/>
My Widget.Mohre.Button style
#color/textColorWhite
#drawable/mohre_button_selector
#style/TextAppearance.Button
#animator/button_state_list_anim
My selector drawable
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/mohre_button_pressed" android:state_pressed="true" />
<item android:drawable="#drawable/mohre_button_selected" android:state_enabled="false" android:state_pressed="false" />
<item android:drawable="#drawable/mohre_button_normal" />
My individual drawables are just rectangle shapes with different colors like these
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners android:radius="30dp"></corners>
<solid android:color="#3a516a"></solid>
</shape>
The button doesn't take on the colors at all from the selector drawable. It just shows the default accent color of the application
With the normal way (setting the selector drawable as background of the button), it won't work as expected if you are using Theme.MaterialComponents.
You can use Theme.AppCompat.DayNight.NoActionBar as an alternative, but if you don't want to use that theme, then simply use:
<androidx.appcompat.widget.AppCompatButton
................/>
You will get the same result as it was working with the Appcompat theme even if you are using latest Material themes!
as explained in this medium post https://medium.com/over-engineering/hands-on-with-material-components-for-android-buttons-76fa1a92ec0a we can use ColorStateList to change color or background of Button.
For me working solution for now was to set backgroundTint to null and backgroundTintMode to add like this:
<style name="Button.XYZ" parent="Button">
<item name="shapeAppearance">?attr/shapeAppearanceLargeComponent</item>
<item name="drawableTint">#color/ColorXYZ</item>
<!-- background drawable -->
<item name="backgroundTint">#null</item>
<item name="backgroundTintMode">add</item>
<!-- background drawable -->
<item name="android:background">#drawable/XYZ</item>
<!-- Color drawable -->
<item name="android:textColor">#color/XYZ</item>
</style>
And also using the style in xml not in theme
If you want a button that has a custom background (to apply <selector> e.g), but your theme is set up to use Theme.MaterialComponents (which is nowadays, 2021), you could switch the XML element in the layout to be <android.widget.Button> instead of <Button>. This should cause the Material Components for Android to ignore that element, and you can manipulate this button normally with respect to XML attributes.
I'm trying to use a 9-patch image as a splash screen, but I get a weird artefact when doing so.
I use the following style on the activity
<style name="AppTheme.Splash" parent="Theme.AppCompat.Light.NoActionBar">
<item name="android:windowBackground">#drawable/splash_screen</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>
</style>
This references the following drawable
<?xml version="1.0" encoding="UTF-8" ?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<color android:color="#color/splash_background" />
</item>
<item>
<nine-patch
android:src="#drawable/test_splash"
android:tileMode="disabled"
android:gravity="center" />
</item>
</layer-list>
The 9-patch image has two scalable vertical regions---above and below "Middle". There is no horizontal scaling set.
What this ends up giving me is
Where is that black bar 3/4 of the way down coming from?
I had the same issue. After scrubbing thru all of my splash.9.png files looking for the problem, I retreated and tried one that worked fine in another app. It produced the same artifact.
It seems the issue is with the Theme.AppCompat.Light.NoActionBar. Try this instead:
<style name="splashscreen" parent="android:Theme">
It doesn't look exactly the same around the title bar and such, but it looks like a splash screen.
I don't use Xamarin (I use Titanium), but I had this exact problem when I didn't provide a padding box (the black pixels on the right and bottom). I fixed it by filling the padding lines with black.
I am adding an actionbar to a test app I'm writing, and I see questions throughout stackoverflow about this, but nothing that has helped me at all. Based off of this guide:
http://android-developers.blogspot.com/2011/04/customizing-action-bar.html
I'm trying to change the select color for tabs that i'm using on my action bar. The default is that faint blue color. Just as a test I did this:
<style name="CustomTab" parent="android:style/Widget.Holo.Light.ActionBar.TabView">
<item name="android:background">#000000</item>
</style>
That gives me a solid black tab completely, not the selector part. Can someone help better direct me here? I can't seem to find a good example anywhere.
First you have to define a selector xml file then write this code there and replace your code with this
item name="android:background">#drawable/yourfilename</item>
and the selector xml
<?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/picture_selected" />
<item
android:state_focused="true"
android:drawable="#drawable/picture_selected" />
<item
android:drawable="#drawable/picture_unselected" />
</selector>
I'm adding tab icon via selector like this:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/tab_cart_selected" android:state_selected="true" />
<item android:drawable="#drawable/tab_cart" />
</selector>
http://img844.imageshack.us/img844/2535/questionn.jpg
All is fine, but my icon is smaller then tab itself and I want to set background color same as icon color. But I cant seem to figure out hot to do that.
Any suggestions?
use a .png transparency.
How to Make a Transparent PNG
test with this image and you will see