Develop Reference

Unable to see any icons at the Bottom Navigation bar

I have been trying to display the icon images on my bottom navigation bar. No matter what I try I still can't get it. I have been trying so many different ways to solve but to no avail. Could someone please help me on this? Maybe I have missed out on something.
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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="#color/yellow"
tools:context=".MainActivity">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:id="#+id/fragment_layout">
</FrameLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavView"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="bottom"
android:background="#color/white"
app:menu="#menu/menu">
</com.google.android.material.bottomnavigation.BottomNavigationView>
</androidx.coordinatorlayout.widget.CoordinatorLayout>```
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/nav_donate"
android:icon="#drawable/donate_icon"
android:title="Donate"/>
<item
android:id="#+id/nav_status"
android:icon="#drawable/status_icon"
android:title="Status"/>
<item
android:id="#+id/nav_history"
android:icon="#drawable/history_icon"
android:title="History"/>
<item
android:id="#+id/nav_logout"
android:icon="#drawable/logout_icon"
android:title="Log Out"/>
</menu>
```
The image link below is how the display is as of now.
[1]: https://i.stack.imgur.com/EH6AQ.png

Your layout height is set to 0dp
android:layout_height="0dp" where it is matching the constraints it is given. I have not seen your display but I'm guessing the frame layout is hiding your bottomNavView.
Change it to
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:id="#+id/fragment_layout"
app:layout_constraintTop_toTopOf="parent">
app:layout_constraintBottom_toTopOf="#id/bottomNavView">
</FrameLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavView"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="bottom"
android:background="#color/white"
app:layout_constraintBottom_toBottomOf="parent">
app:menu="#menu/menu"/>
EDIT
With help from #Niaj Mahmud .
Change the material version in your app level build.gradle files from 1.5.0 to 1.3.0

yes in physical device it's work properly but in preview it does not show. this issue is for material version 1.5.0 .. try material 1.3.0 version
live view of bottom navigation in design view is not showing icons and the menu resource

Drawable behaves differently in different activity layouts in Android Studio

I have the following drawable: custom_yellow_button.xml in the drawable folder
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<corners android:radius="5dp"/>
<solid android:color="#color/yellow"/>
</shape>
</item>
</selector>
and I have these two different layouts which both identically use the button:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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="#FFFFFF"
tools:context=".LogInActivity">
<Button
android:id="#+id/login_button"
android:layout_width="275dp"
android:layout_height="35dp"
android:layout_marginTop="20dp"
android:background="#drawable/custom_yellow_button"
android:fontFamily="#font/courierprime_regular"
android:includeFontPadding="false"
android:text="Log In"
android:textColor="#000000"
android:textSize="21sp"
app:backgroundTintMode="add" />
</androidx.constraintlayout.widget.ConstraintLayout>
and
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
tools:context=".RegistrazioneActivity">
<Button
android:id="#+id/login_button"
android:layout_width="275dp"
android:layout_height="35dp"
android:background="#drawable/custom_yellow_button"
android:fontFamily="#font/courierprime_regular"
android:includeFontPadding="false"
android:text="Log In"
android:textColor="#000000"
android:textSize="21sp" />
</androidx.constraintlayout.widget.ConstraintLayout>
In the first layout, it looks like this, which is how I want it :
while in the second layout, it looks like this:
.
Can anyone tell me why? I can provide more info if needed.

I am not sure what theme are you using, but with MaterialThemes you can do this and it's easy. First check this: https://material.io/components/buttons
Then, change your app theme to extend one of the material themes, like this:
<style name="AppTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
Then add implementations:
implementation 'com.google.android.material:material:1.2.1'
After that you can simply use this as your button inside your XML:
<com.google.android.material.button.MaterialButton/>
Inside this View you have a lot of attributes for your button. Simply check above link and see. For yours I would go with something like this:
<com.google.android.material.button.MaterialButton
android:layout_width="match_parent"
android:layout_height="60dp"
android:textAlignment="center"
android:textAllCaps="true"
android:padding="15dp"
android:backgroundTint="#color/yellow" //add background color
app:rippleColor="#color/colorPrimary" //ripple color - when button is pressed
style="#style/Widget.MaterialComponents.Button.TextButton" //material component style, many options to choose from
android:textColor="#color/colorPrimaryDark"
app:cornerRadius="15dp" //corner radius, so you can adjust how much oval you want your corners to be/>
And you get something like this:

See AndroidManifest.xml and make sure you have the same theme assigned to both of them.
The XML editor's preview also can be switched to all available themes, including custom themes.
When you provide the layout's Context to the XML editor alike this:
xmlns:tools="http://schemas.android.com/tools"
tools:context=".activity.MainActivity"
The XML editor will pick up that theme for the preview - and there's no need to switch them.

My BottomNavigationBar icons goes outside of the screen

I am using BottomNavigationBar from here. I followed every instruction carefully and it works fine until I got this problem where icons pop out of the screen with too much of gap between them.
Menu_items.xml
<menu xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/nav_Menu"
android:enabled="true"
android:icon="#drawable/menu"
android:title="#string/nav_menu"
android:visible="true"
app:showAsAction="withText"/>
<item
android:id="#+id/nav_Deals"
android:enabled="true"
android:icon="#drawable/fire_deals_icon"
android:title="#string/nav_deals"
android:visible="true"
app:showAsAction="withText"/>
.
.
.
</menu>
MainMenu.xml
<RelativeLayout 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:id="#+id/main_menu_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/TextcolorforWhite"
tools:context=".MainMenu">
<com.ittianyu.bottomnavigationviewex.BottomNavigationViewEx
android:id="#+id/main_nav"
android:layout_width="wrap_content"
android:layout_height="56dp"
android:layout_alignParentBottom="true"
app:menu="#menu/nav_items"/>
<View
android:id="#+id/myProfileDivider"
android:layout_width="match_parent"
android:layout_above="#+id/main_nav"
android:layout_height="0.5dp"
android:background="#color/SettingsColor"/>
<FrameLayout
android:id="#+id/main_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:paddingBottom="57dp"
android:layout_above="#id/myProfileDivider">
</FrameLayout>
Is there any solution for this?

In MainMenu.xml (in case of using constraintLayout, as the main parent layout, which is better to use) change android:layout_width="match_parent" to android:layout_width="0" and add these:
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
Also you may have to omit: android:layout_alignParentBottom="true".

See this documentation
Don’t use more than five destinations. For those cases, try tabs or a navigation drawer.
Five destinations: Active destinations display an icon and text label. Inactive destinations use icons, and use text labels if space permits.
Did you check your icon size
The recommended width is 24dp
The recommended height is 24dp

First remove android:layout_alignParentBottom="true" from your FrameLayout Second in your com.ittianyu.bottomnavigationviewex.BottomNavigationViewEx add below item:
android:layout_alignParentEnd = "true"
android:layout_alignParentStart = "true"
android:layout_width="match_parent"

Content goes behind soft navigation bar for api 21 and up

Have upgraded app to use Material Design - Theme.AppCompat.Light.NoActionBar, Toolbar instead of ActionBar etc..
And have a problem.
Bottom content become to be hidden under soft NavigationBar (see picture below) on devices with APi >= 21
Have found solution to fix this:
in values-v21/styles.xml
<style name="MyTheme" parent="Theme.AppCompat.Light.NoActionBar">
...
<item name="colorPrimaryDark">#color/green</item>
<item name="android:windowDrawsSystemBarBackgrounds">false</item>
</styles>
if option <item name="android:windowDrawsSystemBarBackgrounds">false</item> - bottom content is visible, but statusbar become completely black. I cant change color to colorPrimaryDark (green in my case)
if option <item name="android:windowDrawsSystemBarBackgrounds">true</item> - bottom content is invisible, and statusbar is green, as expected.
I want to have statusbar colored(green) and visible bottom content..
Probably, issue is with toolbar. Is it pushes content down?
Any suggestions?
<item name="android:windowDrawsSystemBarBackgrounds">true</item>
<item name="android:windowDrawsSystemBarBackgrounds">false</item>
UPDATE:
As suggested #azizbekian, I've replaced container for fragmets to CoordinatorLayout(before FrameLayout) and applied android:fitsSystemWindows="true"
In this case bottom panel is visible, but not at the bottom..
Goal is to keep buttons athe bottom...
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical">
<include
layout="#layout/toolbar"/>
<!-- The main content view -->
<android.support.design.widget.CoordinatorLayout
android:id="#+id/content"
android:fitsSystemWindows="true"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
layout of the screen:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android">
<FocusableScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:id="#+id/order_editor_layout"
android:fillViewport="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<include
android:layout_width="match_parent"
android:layout_height="match_parent"
layout="#layout/o_e_content"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"/>
</RelativeLayout>
</FocusableScrollView>
<include
android:layout_width="match_parent"
android:layout_height="wrap_content"
layout="#layout/oe_bottom_pane"/>
</LinearLayout>
Here is result:
UPDATE#2
Activity Layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:theme="#style/ActionBarTheme"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<!-- The main content view -->
<FrameLayout
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.design.widget.CoordinatorLayout>
Replaced LinearLayour with CoordinatorLayout as root for activity.
As root element for content I've keep FrameLayout.
Applied android:fitsSystemWindows="true" to CoordinatorLayout.
This way, all content was slightly moved up and part of placed below the toolbar(you can see on image below - top elements are circle with + and - symbold. But on previous images there are text on the top.) Regarding bottom elements (buttons panel) - still placed below navigation bar but also slightly moved up. I've marked android:background="#color/red" to easier recognize position of this panel.
Seems, we are on the right way. All we need - to resolve problem - why content moved below the toolbar.. If tolbar will be top ui elemnt, buttons will be visible..

Apply android:fitsSystemWindows="true" to your root view.
See this post for detailed explanation.

Android: Activity showing extra space at bottom when padding 0dp - Related to json?

I have an activity that shows extra space at the bottom even though I have no bottom padding applied. Style code, xml code, java code and a screenshot are below and the relevant json data is here:
http://lara.rufflecol.es/strollcharlton/strollcharlton_data_1_2.json
It isn't a huge issue it is just annoying! Have already tried to using android:fillViewport set as true or false but it doesn't seem to make any difference. Is the problem related to my json?
UsefulLinks.xml
<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="">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
android:background="#color/dark_green"
android:minHeight="?attr/actionBarSize" />
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/toolbar"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/useful_links"
style="#style/UsefulLinksTextStyling"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="left" />
</LinearLayout>
</ScrollView>
</LinearLayout>
styles.xml
<style name="UsefulLinksTextStyling" parent="#android:style/TextAppearance.Medium">
<item name="android:textColor">#color/white</item>
<item name="android:textSize">#dimen/fifteen_size</item>
<item name="android:paddingTop">15dp</item>
<item name="android:paddingLeft">15dp</item>
<item name="android:paddingRight">15dp</item>
</style>
UsefulLinks.java
TextView usefulLinksIntroTextView = (TextView) findViewById(R.id.useful_links);
usefulLinksIntroTextView.setText(Html.fromHtml(data.getUsefulLinks()));
usefulLinksIntroTextView.setMovementMethod(LinkMovementMethod.getInstance());
Screenshot

ensure the html that you are setting to the textview does not having blank space inside of it
change your base LinearLayout to wrap_content so that if the html takes up less than the screen height you don't have "extra padding"
You can also turn on "show layout bounds" for your application, that way you will understand which View is giving you the "extra padding" http://tysmith.me/post/27035355999/layoutbounds combine it with the Hierarchy Viewer http://developer.android.com/tools/performance/hierarchy-viewer/index.html to work out which View is at fault