Develop Reference

Android NavigationView vith rounded corners

I am designing a custom Drawer on Android, it must have rounded corners in top and bottom, I am first customizing top side and I find the problem that the background of the shape is not transparent.
I have:
(source: toile-libre.org)
I need to build:
(source: toile-libre.org)
I would also like some help on how to round it on the bottom
nav_header_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="#dimen/nav_header_height"
android:background="#drawable/side_nav_bar"
android:gravity="bottom"
android:orientation="vertical"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
android:theme="#style/ThemeOverlay.AppCompat.Dark">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<ImageView
android:id="#+id/imageView"
android:layout_width="0dp"
android:layout_weight="4"
android:layout_height="wrap_content"
android:contentDescription="#string/nav_header_desc"
android:paddingTop="#dimen/nav_header_vertical_spacing"
app:srcCompat="#mipmap/ic_launcher_round" />
<LinearLayout
android:layout_width="0dp"
android:layout_weight="5"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/nav_header_vertical_spacing"
android:text="#string/nav_header_title"
android:textColor="#color/colorWhite"
android:textAppearance="#style/TextAppearance.AppCompat.Headline" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#color/colorWhite"
android:text="#string/nav_header_subtitle" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
side_nav_bar.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:width="3dp"
android:color="#color/colorPrimary"
/>
<corners android:radius="1dp"
android:bottomRightRadius="0dp" android:bottomLeftRadius="0dp"
android:topLeftRadius="30dp" android:topRightRadius="0dp"/>
</shape>

If you are using the NavigationView in the Material Components library, you can apply a custom ShapeAppearanceModel to the corner of the your NavigationView.
Something like:
float radius = getResources().getDimension(R.dimen.roundcorner);
NavigationView navigationView = findViewById(R.id.nav_view);
MaterialShapeDrawable navViewBackground = (MaterialShapeDrawable) navigationView.getBackground();
navViewBackground.setShapeAppearanceModel(
navViewBackground.getShapeAppearanceModel()
.toBuilder()
.setTopRightCorner(CornerFamily.ROUNDED,radius)
.setBottomRightCorner(CornerFamily.ROUNDED,radius)
.build());
In this way the NavigationView has rounded corners.
Now you have to pay attention to the header layout to build a rounded corner on the top. You have to use as background for the header view, something like:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#drawable/side_nav_bar"
...>
where the side_nav_bar is
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
....
<corners android:topRightRadius="32dp" />
</shape>
Don't use a rounded corner on the bottom, because it is only the view used on the header of the NavigationView.
The ShapeAppearanceModel requires the version 1.1.0 of material components (currently 'com.google.android.material:material:1.1.0-alpha10')

In Kotlin Language create a class to make extensions:
fun MaterialNavigationView.changeCornerRadius() {
val navViewBackground : MaterialShapeDrawable = background as MaterialShapeDrawable
val radius = resources.getDimension(R.dimen.menu_radius)
navViewBackground.shapeAppearanceModel = navViewBackground.shapeAppearanceModel
.toBuilder()
.setTopLeftCorner(CornerFamily.ROUNDED, radius)
.setBottomLeftCorner(CornerFamily.ROUNDED, radius)
.build()
}
Usage:
val materialNavigationView: MaterialNavigationView = findViewById(R.id.material_navigation_view)
materialNavigationView.changeCornerRadius()

Add bottom left radious
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:width="3dp"
android:color="#color/colorPrimary"
/>
<corners android:radius="1dp"
android:bottomRightRadius="0dp" android:bottomLeftRadius="30dp"
android:topLeftRadius="30dp" android:topRightRadius="0dp"/>
</shape>

If you don't want to use MaterialShapeDrawable, the following method.
It's also the best way I think.
First, Adjust the Opacity of the background of the Navigation View.
Second, Round the layout inside the Navigation View.
❖ However, be careful with the background of the top and bottom views.
layout_gnb.xml
<com.google.android.material.navigation.NavigationView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/NAVIGATION_VIEW"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00000000">
<LinearLayout
android:id="#+id/LINEAR_LAYOUT_03"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#drawable/rounded_right_corner_light_white_rectangle">
...
</LinearLayout>
</com.google.android.material.navigation.NavigationView>
rounded_right_corner_light_white_rectangle.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners android:topRightRadius="30dp"
android:bottomRightRadius="30dp" />
<solid android:color="#color/colorLightWhite" />
</shape>

You can just add this line into NavigationView:
app:drawerLayoutCornerSize="xdp"

How to set gradient color from complete transparency to dark in android?

I have an imageview and a cardview elevated on top of it. The cardview contains multiple views inside it.
I want to set a background color to cardview such that its startcolor should make the initial part of the imageview behind it to be visible at a transparency rate of 30% and the cardview should become darker and darker and black at the end.
This is what I have tried so far:
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="#80000000"
android:endColor="#FF000000"
android:angle="270"
android:dither="true"
/>
</shape>
This doesn't make my imageview visible.I have explored many SOF posts but wasn't able to reproduce what I want!
Any inputs are welcome and would be very helpful!!

Use this XML code
<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:startColor="#21293B"
android:centerColor="#21293B00"
android:endColor="#00000000"
android:angle="90"/>
</shape>
put it as a background to a View, put that View above your ImageView
<RelativeLayout
android:id="#+id/player_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:id="#+id/shasha_poster"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:minHeight="500dp"
android:scaleType="centerCrop"
android:src="#drawable/placeholder"
android:visibility="visible" />
<View
android:id="#+id/gradient"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/background_with_shadow2" />
</RelativeLayout>

You can do something like this
// this is your back image
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/xxxxx"
...
/>
// your cardview over the image
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="100dp"
app:cardBackgroundColor="#00000000" // make cardview transparent
...
>
// an image to make the new drawable background
<ImageView
android:background="#drawable/gradient" // the xml with your gradient
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitXY"
/>
</android.support.v7.widget.CardView>

I think this is what you looking for, I test this and work as you expected.
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/your_image" />
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
card_view:cardBackgroundColor="#color/transparent"
card_view:cardCornerRadius="5dp"
card_view:cardElevation="0dp"
card_view:cardMaxElevation="0dp"
card_view:cardPreventCornerOverlap="false"
card_view:cardUseCompatPadding="true"
card_view:contentPaddingTop="2dp">
<RelativeLayout
android:id="#+id/list_container_bg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="#drawable/your_gradient"
android:gravity="center"
android:orientation="vertical">
<!--Add your cardview contents-->
</RelativeLayout>
</android.support.v7.widget.CardView>
</FrameLayout>
This is the gradient background file your_gradient.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="#80000000"
android:endColor="#FF000000"
android:angle="270"
android:dither="true"
/>
</shape>

Make Layout transparent

Ive got a Layout where I have viewpager with sliding tabs.Now I want to make the upper part of my layout transparent so I get the effect that the activity before it is kinda visible.
It should look like this :
My Layout :
<LinearLayout 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"
android:orientation="vertical"
tools:context=".Main">
<include
android:id="#+id/tool_bar"
layout="#layout/tool_bar"
android:layout_marginTop="200dp" //THIS part should make the upper piece transparent
android:layout_height="wrap_content"
android:layout_width="match_parent"
/>
<com.kas.SlidingTabs.SlidingTabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="2dp"
android:background="#color/colorPrimary"/>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_height="match_parent"
android:layout_width="match_parent"
></android.support.v4.view.ViewPager>
My Apptheme I used in this Activity :
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
I allready tried #android:color/transparent as background in LinearLayout but its not helping.I also tried this solution https://stackoverflow.com/a/8831226/4035864
But then my logcat says :You need to use a Theme.AppCompat theme (or descendant) with this activity.
EDIT:
ToolbarLayout :
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:background="#color/colorPrimary"
android:elevation="2dp"
android:theme="#style/Base.ThemeOverlay.AppCompat.Dark"
xmlns:android="http://schemas.android.com/apk/res/android" />

Android ActionBar with custom Icons?

I want to create a Android ActionBar which looks like the following.
How can I build such a ActionBar. Is it possible to build it with Android material Design?

I would use the new ToolBar from Android Design Support Library
http://android-developers.blogspot.it/2015/05/android-design-support-library.html
Using ToolBar instead of ActionBar will give you more control on the elements themselves.
You can find a good article here:
http://www.android4devs.com/2014/12/how-to-make-material-design-app.html
app_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/appBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#3F51B5"
android:theme="#style/ThemeOverlay.AppCompat.Dark" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.TabLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:id="#+id/tabLayout"/>
</FrameLayout>
</android.support.v7.widget.Toolbar>
main_activity_layout.xml
<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="wrap_content"
tools:context=".MainActivity">
<include layout="#layout/app_bar" />
</RelativeLayout>
main_activity_onCreate()
toolBar = (Toolbar) findViewById(R.id.appBar);
toolBar.setTitle("Titolo");
setSupportActionBar(toolBar);
tabLayout = (TabLayout) findViewById(R.id.tabLayout);
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.user));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.user_group_1));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.user_group_2));
styles.xml
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
</style>

Technically you could stitch together such a layout with multiple elements. For example you have a header layout containing a TabLayout on the left and a Toolbar on the right side, instead of using the standard ActionBar.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:orientation="horizontal">
<android.support.design.widget.TabLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" />
<android.support.v7.widget.Toolbar
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
This example uses the AppCompat v7 and the Design Support library.
You may style the Views in a way (e.g. same background color) such that it looks as if its one single UI element.

Setting Background Image for a ListView

Hey Guys facing a problem with setting a background image on my ListView. Code is as below
history.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ListView android:id="#id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="#00000000"
android:layout_weight="1"
android:drawSelectorOnTop="false"
android:src="#drawable/back">
</ListView>
<TextView android:id="#id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FFff00"
android:text="No data"
android:cacheColorHint="#00000000"
/>
</LinearLayout>
rowlayout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<TextView android:id="#+id/ProductName"
android:textSize="25sp"
android:textColor="#FFFF00"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
Java Code
...
setListAdapter(new ArrayAdapter<String>(this, R.layout.rowlayout,R.id.ProductName,Names));
...
I dont know what i am doing here but the background does not appear. Its black throughout. If i put the background on the text view in rowlayout.xml then it appears but its like whole screen carries one entry of the ListView. Tried alot of tutorials. Maybe doing some rookie mistake.. help me out please

use android:background="#drawable/icon" for listview like
<ListView android:id="#id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="#00000000"
android:layout_weight="1"
android:drawSelectorOnTop="false"
android:background="#drawable/icon">
</ListView>

use android:background="#00000000" on your listview items, then set the parent forms background to your image

As I understand your code concept correctly you want to achieve two Views lying on the LinearLayout, one of which (TextView in your case) cover layout with it's background and another one is transparent. So there is no other way than to set background for your layout and make your ListView transparent, using android:background="#00000000" and also you should set android:cacheColorHint="#00000000" to avoid filling your ListView background with black during scrolling

I believe what you're experiencing is described here: http://android-developers.blogspot.com/2009/01/why-is-my-list-black-android.html
Because of an optimization called "cache color hint", the background of your list is being set by default to the window's background color, #191919 in Android's dark theme.
If you set a background on each row, I think you'll see what I mean. Try setting the following background shape:
<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle"
>
<stroke
android:color="#color/mid_gray"
android:width="1dp"
/>
<padding
android:left="7dp"
android:top="7dp"
android:right="7dp"
android:bottom="3dp"
/>
<corners android:radius="10dp" />
<solid android:color="#android:color/white" />
</shape>
like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#drawable/shape_data_background">
<TextView android:id="#+id/ProductName"
android:textSize="25sp"
android:textColor="#FFFF00"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>