I have two same screens, with a logo at the center of the screen.
However, one screen has statusbar height considered while the other one doesn't, so the position of the logo does not match between the two.
This is the code on xml.
screen 1
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/blue" />
<item
android:height="200dp"
android:width="200dp"
android:gravity="center"
android:drawable="#mipmap/ic_launcher_foreground">
</item>
</layer-list>
screen 2
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/blue"
android:gravity="center">
<ImageView
android:layout_height="200dp"
android:layout_width="200dp"
android:layout_marginBottom = "39dp"
android:scaleType="centerCrop"
android:src="#mipmap/ic_launcher_foreground"/>
</LinearLayout>
I use galaxy s10, which has height of statusbar of 39dp.
Now I can manually set margin of 39 to match the position of the logo(like the code above), but that is only for one specific device(which is s10). I need to set the margin dynamically for different mobile devices.
How do I do this? and why does one screen integrates the status bar height while the other doesn't?
P.s. This is a react-native project.
I would like to add arrows as dividers between my listview items. I've gotten pretty far, but my arrow is stretched and there is no option to set the divider width. Here is what I have so far...
In my styles.xml:
<style name="dividedListStyle" parent="#android:style/Widget.ListView">
<item name="android:cacheColorHint">#android:color/transparent</item>
<item name="android:divider">#drawable/baseline_expand_more_black_24</item>
<item name="android:dividerHeight">50dp</item>
</style>
Then in my layout file:
<ListView
android:id="#+id/checklist"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/menu"
android:layout_alignParentTop="true"
style="#style/dividedListStyle">
</ListView>
This is what the divider looks like:
This is what I need:
The ListView divider is stretched to full width of the ListView and your selected height (<item name="android:dividerHeight">50dp</item>). That's why your image is stretched.
To avoid it and keep the size/ratio unchanged, there are such ways:
Use 9-patch drawable. You may use a default Android 9-patch editor to convert your arrow to 9-patch (you still need some basic knowledge about how 9-patch works)
Make your arrow drawable a part of the drawable or a layer-list drawable:
<?xml version="1.0" encoding="utf-8"?>
<bitmap
xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center"
android:src="#drawable/baseline_expand_more_black_24">
</bitmap>
My splash screen is a layer-list drawable as background in app theme. Here is it:
background_splash.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:drawable="#color/dark_blue"/>
<item android:top="100dp">
<bitmap
android:gravity="top"
android:src="#mipmap/img_logo"/>
</item>
</layer-list>
As you see, I place the logo with margin 100dp from the top. Then I try to do the same in my fragment layout:
fragment_start.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#mipmap/bg_create_account">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#mipmap/img_logo"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="100dp" />
</RelativeLayout>
But the logo in the layout appears lower than logo on the splash screen. I thought, the problem is in the default margin of Activity. But if I set:
<dimen name="activity_horizontal_margin">0dp</dimen>
<dimen name="activity_vertical_margin">0dp</dimen>
Nothing still happens. I always see the "jump" of logo from top to down about 10-20 dp. How can I avoid it?
EDIT: My activity xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
</LinearLayout>
EDIT 2: I tried to pick up the distance manually and if I set <item android:top="125dp"> (or 126dp) and leave android:layout_marginTop="100dp" I see no "jump". It means the difference is 25 or 26 dp, but where are they?
EDIT 3: according to answer from Bryan the issue exists only in Android 4.4(API 19) and above. To avoid it I overrode styles.xml in folder values-19 with:
<item name="android:windowTranslucentStatus">true</item>
It seems drawable that you use for the splash screen does not take into account the size of the status bar, but the Activity does. This is the ~25dp difference you are observing, though this height of ~25dp is not guaranteed to be the same on all devices.
Maybe the problem is in the ActionBarSize, try add this to the SplashScreen :
Without AppCompat
android:paddingTop="?android:attr/actionBarSize"
With AppCompat
android:paddingTop="?attr/actionBarSize"
Or if you want, (although may be considered a bad practice), you can set a negative padding in the Activity Layout using data binding :
android:paddingTop="#{-1 * ?android:actionBarSize}"
I've got a Customer Spinner with images inside of it. Right now everything is working as intented except for two small things:
The Spinner is not showing except for a small thin line.
The Spinner Items gray border extends a bit.
I've added screenshots of these problems below:
What I want is:
Instead of the small thin line above, I want an empty CheckBox-image like the one below it.
At the right of the images of the Spinner items is a gray part, this should be removed.
I know both of these problems are in the xml files, but I'm kinda new to Android and I'm always a bit confused with which layout_widht/height to use when.
Here are the xml files:
activity_main.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.example.testproject.MainActivity$PlaceholderFragment" >
<Spinner
android:id="#+id/spCheckbox"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="15dp"
android:drawSelectorOnTop="true" />
<ImageButton
android:id="#+id/ibtnCheckbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="15dp"
android:contentDescription="#string/checkbox_content_description"
android:src="#drawable/checkbox_unchecked"
android:background="#drawable/transparent_background" />
</LinearLayout>
spinner_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/cbImage"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:background="#drawable/transparent_button_background" />
</RelativeLayout>
(transparent_background.xml:)
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true" android:drawable="#android:color/transparent" />
<item android:state_pressed="true" android:drawable="#android:color/transparent" />
<item android:drawable="#android:color/transparent" />
</selector>
So.. Which layout_width / layout_height do I need to change to get the proper results?
Thanks in advance for the responses.
EDIT: I did some research and I started by replacing all fill_parent with match_parent (since it's the same and fill_parent is deprecated after API lvl. 8). For my problem it seems my activity_main layout should be match_parent to be fullscreen and the Spinner, Spinner Item's Layout and Spinner Item's ImageView should all be wrap_content.
Still, if I change it to that, both problems still remain the same. If anyone knows how to display the selected Image of the Spinner and how to remove the gray spacing of the Spinner item, let me know.
The problem of the thin line instead of the Spinner is solved.. It turns out when I was following a tutorial somewhere on the internet they added the line:
spinner.getLayoutParams().width = 3;
Removing this line, obviously, fixed the first problem.. >.> (No idea why they've added this in the first place too be honest, but now that it's gone I see my spinner as normal)
Now I just need to fix the second problem of the gray borders, but I'm sure I'll find a solution eventually..
EDIT: Since I wanted to remove the spinner right-bottom arrow in addition to the gray padding, I decided to remove the Spinner entirely and create a Pop-up with a LineairLayout which has a vertical orientation.
For a reference to the code, I posted it in another question of mine.
I would like to add padding between EACH item in a listview, but I would like to keep the default divider as I think it is aesthetically pleasing. Anything wider looks ugly.
I currently have:
<com.example.practice.MyListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:drawSelectorOnTop="false"
android:layout_below="#id/name" />
Now, I have tried using a transparent divider, and this succeeds at getting the spacing I want, but then I don't see the little line. And if I don't use a transparent divider than I have a huge thick ugly line. I want to keep the default line shown, and just add some spacing on the top part of each listview item.
You wouldn't be able to achieve what you want as simple as that then.
Step one: Set the divider as transparent, and make the height a tad larger:
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="#android:color/transparent"
android:dividerHeight="8dp"/>
Step Two: In order to achieve the 'little line' effect, you can add a custom drawable as the list view item background, say the list view item is defined as 'list_item.xml':
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
<-- Add a Custom background to the parent container of the listview items -->
android:background="#drawable/list_item_selector"
android:orientation="vertical" >
<-- Rest of the item layout -->
</LinearLayout>
Of course, that item can be anything you like it to be, mine is:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape
android:shape="rectangle">
<stroke android:width="1dp" android:color="#color/bg_gray" />
<solid android:color="#android:color/white" />
</shape>
</item>
<item android:bottom="1dp">
<shape
android:shape="rectangle">
<stroke android:width="1dp" android:color="#FFDDDDDD" />
<solid android:color="#00000000" />
</shape>
</item>
</layer-list>
But that would then disable the 'Holo Selector' effect, where whenever you click, or highlight an item on the listview, there is a Holo Blue color drawn over it, that's why if you notice on the list item background we didn't use a layer list drawable, we used a selector named 'list_item_selector'.
Here's the selector, which uses the layer list drawable when not pressed, and uses a Holo-blue color when pressed:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_pressed="false"
android:drawable="#drawable/list_item_bg2"
/>
<item android:state_pressed="true"
android:drawable="#color/holo_blue"
/>
</selector>
EDIT for Comment
Absolutely possible, you can define a set height for list view items, however, it is recommended to set a minimum height, rather than a predefined height that never changes.
Say this is my list item layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/grid_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:src="#drawable/ic_launcher" />
<TextView
android:id="#+id/grid_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:gravity="center_vertical"
android:layout_toRightOf="#+id/grid_image"
android:minHeight="48dp"
android:padding="8dp"
android:textIsSelectable="false" />
</RelativeLayout>
All needed would be,
Step One: Define the min height, or max height, as you prefer, in the dimens.xml file contained in the values/ folder. Why? Because the height should definitely change based on the layout, and you can define different dimens.xml for each device density.
in the dimens.xml, say:
<resources>
<!-- List Item Max and Min Height -->
<dimen name="list_item_min_height">48dp</dimen>
<dimen name="list_item_max_height">96dp</dimen>
<dimen name="list_item_set_height">64dp</dimen>
</resources>
And then use whichever value for the parent LinearLayout of you list item's layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="#dimen/list_item_min_height" >
And that's it for that topic, now to center the text, it's even simpler:
If you are using a TextView and is wrapped into a RelativeLayout, use: android:layout_centerVertical="true"
If you are using a LinearLayout, use: android:layout_gravity="center_vertical"
and couple that with: NOTE This only works if you didn't set the height to wrap_content, otherwise it is irrelevant.
android:gravity="center_vertical"
Hope that helps.
I don't know if I understand your question precisely.
If you want the divider to be transparent so you see a peace of the background between each ListView so it gives a kind of 3D effect when scrolling. You could do it this way:
In your list_item xml give the LinearLayout the background color you want for example:
<LinearLayout
android:id="#+id/listItem"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="4dip"
android:orientation="horizontal"
android:background="#FFFFFF"
>
Then give your ListView a background color like this:
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/fragmentListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="#android:color/transparent"
android:dividerHeight="8dip"
android:background="#0000FF"
android:cacheColorHint="#android:color/transparent"
android:drawSelectorOnTop="true"
/>
Now your ListView scrolls over your background
I hope this is what you wanted.
Also one more way to increase the spacing between the list items is that you add an empty view to your adapter code by providing the layout_height attribute with the spacing you require. For e.g. in order to increase the bottom spacing between your list items add this dummy view(empty view) to the end of your list items.
<View
android:layout_width="match_parent"
android:layout_height="15dp"/>
So this will provide a bottom spacing of 15 dp between list view items. You can directly add this if the parent layout is LinearLayout and orientation is vertical or take appropriate steps for other layout. Hope this helps :-)
you can simply use divider
see the following example
<ListView
android:id="#+id/activity_main_listview_data"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="#android:color/transparent"
android:dividerHeight="10dp"
/>
here, in android:divider you can set color or make it transparent and in dividerHeight for add spce between items.
This is a solution for those of you who do not want the divider to be visible and still want to add more space. To get rid of the divider completely, set it to #null and set the dividerHeight to 0dp. Here is a generic ListView of mines.
<ListView
android:id="#+id/myListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff0000"
android:divider="#null"
android:dividerHeight="0dp"
android:layout_alignLeft="#+id/txtMake"
android:layout_below="#+id/txtMake"
android:fadeScrollbars="false"
android:scrollbarThumbVertical="#drawable/scroll_bar_color"
android:scrollbarStyle="outsideInset" >
</ListView>
Next, go to the xml file in which you use the adapter with to populate your listview. Go to your container (Example RelativeLayout...) and simply add in the following.
android:layout_marginTop="15dp"
This will actually add space for those of you who are not using the divider. Unlike the padding which just increases the box size, this will increase the distance between each item.
Inside the ListView tag in XMLfile add a dividerHeight tag and give it a value(the spacing you want between your list items).
It would provide you with suitable space between the list items.
Code:
<ListView
android:id="#+id/listid"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/transparent"
android:divider="#drawable/divi"
android:dividerHeight="60dp"></ListView>
Now create a drawable XML file (in this case name is divi). Inside it add a stroke tag and give it a width and that would do.
Code:
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="line">
<stroke
android:width="1dp"
android:color="#000000"
/>
</shape>
android:layout_width="match_parent"
android:textColor="#color/colorPrimary"
android:textSize="30dp"
android:layout_height="wrap_content"
Complete Code Here