I'm creating a proportional UI, the thing is that - by different UI resolutions the UI-components get different shapes. I'm using image-text button, which for different resolutions have different dimensions. Could I do so, that the image inside the button resize also proportional depending on button's width/height? (currently the image doesn't change its dimensions and just some parts of it are hidden).
Here is the xml-sorce, I'm using for such kind of button:
<Button
android:id="#+id/today"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableTop="#drawable/today"
android:drawablePadding="0sp"
android:gravity="center_horizontal|bottom"
android:textSize="8sp"
android:text="#string/today"
android:onClick="getRSSNews"
/>
Try to create mdpi and ldpi drawables too (with same name) and see how will that work.
Related
developers out there,
I want to make a GridLayout, which contains several imageViews, but the size of each cell of the GridLayout isn't set yet, because the GridLayoutchanges its size depending on the screen size (ConstraintLayout).
Now I've got the problem that when the Image is bigger than the cell, it is shown on the device (in the android studio it is shown).
I already tried things like setting the image as background, background-tint or change android:background="#drawable/inventarslot" to app:background="#drawable/inventarslot" which was said in other posts in this forum.
This is my GridLayout:
<android.support.v7.widget.GridLayout
android:id="#+id/gl_equipeditems"
android:layout_width="0dp"
android:layout_height="75dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView8">
This is my ImageView:
<ImageView
android:id="#+id/iv_slot1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Profil"
app:layout_column="0"
app:layout_columnWeight="1"
app:layout_gravity="fill"
app:layout_row="0"
app:layout_rowWeight="1"/>
Thank you for your help
Greetings Pumpanickel
Since you're displaying the images based on the screen size, I'm assuming you're also calculating the image size as well.
First, try to set your ImageView scale type to fitCenter, or any scale type that fits your needs. Example of scale types are shown below, taken from here:
Later, programmatically change your ImageView width and height based on the calculations you made.
This way you'll be able to display all the images.
In the image above, the black speech bubble and the red background behind it are a single ImageView that spans the width of a vertical phone screen. The "Hello" is a TextView and the layout is relative. Using margins, I was able to position the "Hello" inside the speech bubble in my Android emulator -- but the positioning is off when I emulate a different phone.
Is there a better way to position my TextView
is there a way to make it responsive (so that the Hello is always in
the speech bubble, no matter what the device)?
Here's my xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/relativeLayout">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/mainGraphic"
android:src="#drawable/finished2"
android:layout_marginBottom="97dp"
android:layout_above="#+id/enterValue"
android:layout_alignParentStart="true" />
<TextView
android:maxWidth="200dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Medium Text"
android:id="#+id/helloText"
android:textColor="#FFFFFF"
android:layout_marginEnd="29dp"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_marginTop="45dp" />
</RelativeLayout>
I would use a FrameLayout instead of the RelativeLayout with same size like the image.
Then use the attributes android:layout_gravity="center" and android:gravity="center" for the TextView.
Try this:
...
<TextView
android:maxWidth="200dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Medium Text"
android:id="#+id/helloText"
android:textColor="#FFFFFF"
android:layout_alignTop="#+id/mainGraphic"
android:layout_alignBottom="#+id/mainGraphic"
android:layout_alignLeft="#+id/mainGraphic"
android:layout_alignRight="#+id/mainGraphic"
android:gravity="center" />
...
Best approach is to use 9-patch image & set it as the background of the Textview. If you use a normal png file, we can't guarantee that it will align correctly on all resolutions & it can become blurred when stretched.
9-Patch image automatically resize to accommodate the contents of the view and the size of the screen. Android SDK provides a tool for creating 9-patch images which is inside SDK sdk/tools directory. See https://developer.android.com/studio/write/draw9patch.html.
You should use a 9-patch for the message shape. What you can do is make the root view of your layout as a FrameLayout and then add a TextView to it. Set the message shape Nine-patch as the background of the TextView.
For creating the 9-patch visit https://romannurik.github.io/AndroidAssetStudio/nine-patches.html by Roman Nurik. There just upload a png file of the image asset and choose the xhdpi definition for best results. The Nine-patch has 3 main properties -
Stretch regions : Defines which areas of the asset can stretch for accommodating different screen densities.
Content Padding : Defines the padding area for the content (text) that is going to appear inside the image.
Optical Bounds : Defines how much area should be optically visible around the asset.
Pros of using Nine-patches :
Scalable
Easy to use
Lightweight
Any amount of content can be put in it.
Hope this helps.
Ideally, you should be using a complete red background to the RelativeLayout, and a black speech 9patch image for the TextView.
But if you really want the RelativeLayout to have background as red with speech bubble, you have to set it at run time.
Calculate the height and width of RelativeLayout at run time say 150px and 300px respectively.
Carefully look at the background image, and determine the edge points of bubble from top, right, bottom and left. For example, if image height is 100px by 200px, and bubble top starts at 30px and bottom ends at 70px, right edge starts at 150px and left ends at 250px. Also calculate the width and height of TextView.
At run time, change the position of TextView based on the above figures.
THE ISSUE:
I cannot seem to get my ImageButtons to appear in the right place or be the right size.
THE PLATFORM:
Eclipse with Android API 16
THE PROBLEM:
My RelativeLayout is 600x800 and my ImageButtons are 194x64, yet when I put them in the editor they are twice as big as they should be. See link to image.
My XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android1="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/main_portal_bg" >
<RelativeLayout
android1:layout_width="353dp"
android1:layout_height="758dp"
android1:layout_marginLeft="115dp"
android1:layout_marginTop="29dp"
android1:background="#000000" >
</RelativeLayout>
<ImageButton
android1:id="#+id/new_customer_button_selector"
android1:layout_width="194dp"
android1:layout_height="64dp"
android1:layout_marginTop="89dp"
android1:contentDescription="#string/back_button_desc"
android1:background="#drawable/new_customer_button_selector" />
<ImageButton
android1:id="#+id/returning_customer_button_selector"
android1:layout_width="194dp"
android1:layout_height="64dp"
android1:layout_alignParentLeft="true"
android1:layout_below="#+id/new_customer_button_selector"
android1:contentDescription="#string/back_button_desc"
android1:src="#drawable/returning_customer_button_selector" />
<ImageButton
android1:id="#+id/redeem_coupon_button_selector"
android1:layout_width="194dp"
android1:layout_height="64dp"
android1:layout_alignParentLeft="true"
android1:layout_below="#+id/returning_customer_button_selector"
android1:contentDescription="#string/back_button_desc"
android1:src="#drawable/redeem_coupon_button_selector" />
<ImageButton
android1:id="#+id/info_button_selector"
android1:layout_width="194dp"
android1:layout_height="64dp"
android1:layout_alignParentLeft="true"
android1:layout_below="#+id/redeem_coupon_button_selector"
android1:contentDescription="#string/back_button_desc"
android1:src="#drawable/info_button_selector" />
</RelativeLayout>
THE RESEARCH:
I have tried to use ScaleType of FitXY, setting MaxHeight and MinHeight, and using android:background instead of android:src. The only way I have been able to make them smaller is by using the Graphical Editor to resize them by holding down SHIFT and dragging the bottom-right corner. That also unfortunately forces them to be automatically aligned to the bottom of the layout and when I try to move them they snap back to their original size and all the other buttons get shuffled around the layout. Editing the XML only gets me part of the way there.
THE QUESTIONS:
Every time I try to move a button in the Graphical Editor, all the other buttons get shuffled in a seemingly random pattern around the screen. Why does this happen?
I set a width of 194dp and a height of 64dp. Changing these values does nothing. Why doesm't this affect the actual width and height of my ImageButton?
When using the Graphical Editor to resize the button by holding SHIFT and dragging the corner, this doesn't change the width and height values in the XML, but just adds margins. See resulting XML below:
<ImageButton
android1:id="#+id/new_customer_button_selector"
android1:layout_width="194dp"
android1:layout_height="64dp"
android1:layout_alignParentBottom="true"
android1:layout_alignRight="#+id/returning_customer_button_selector"
android1:layout_marginBottom="408dp"
android1:layout_marginRight="86dp"
android1:layout_marginTop="89dp"
android1:background="#drawable/new_customer_button_selector"
android1:contentDescription="#string/back_button_desc" />
HERE IS MY FINAL GOAL:
Please tell me how I can get there. This simple thing should be easier.
After reading the information supplied at developer.android.com/guide/practices/screens_support.html, I now understand the 4 different types of screen density. Thanks CaseyB for that link.
I calculated my screen density at roughly 160, after using the utility I found at http://members.ping.de/~sven/dpi.html.
My problem was that the default AVD created by the AVD Manager has the LCD density set to 240 (high).
After setting it to 160, my project rendered with the buttons the correct size.
I left all my drawables in the drawables folder, since I am developing for 1 screen resolution and density. If I decided to use another tablet, then I might make use of the other folders.
TIP: Don't depend on the Eclipse Graphical Editor for asset alignment or sizing. I'm not sure its entirely accurate. I use the old edit the XML and run the project method when trying to adjust size and spacing.
I have an image button with a background image .png of a circle. I am testing it on different resolution screens and it looks different on every one. Most of them distort the circle shape by stretching it on one dimension.
What is the correct way to handle this? I am familiar with the 3 density levels needed for the highest quality image, but I think the problem is with the layout type attributes on either the image button itself or the parent container.
Snippet from main.xml...
<LinearLayout
android:id="#+id/buttonArea"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:orientation="vertical"
android:padding="30dp">
<ImageButton
android:id="#+id/button1"
android:background="#drawable/button_inactive"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_gravity="center"/>
</LinearLayout>
removing the layout_weight attribute from the ImageButton fixed most cases, but not all. It seems that the padding is still changing the ratio of the circle. Scale types have no effect. Is it because my image is set as the background and not the src?
I think android:layout_weight="1" in your ImageButton is the cause of this. It will make your ImageButton the same size of your screen, no matter what size the screen is.
Try to remove that attribute. If that doesn't fix your problem, have a look at android:scaleType attribute
<ImageButton
android:id="#+id/button1"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:layout_gravity="center"
android:background="#null"
android:src="#drawable/button_inactive"
android:scaleType="centerInside"/>
You can set the scaleType attribute of your ImageView, to one that keeps the aspect ratio of your image.
They all behave slightly different, so you'll have to use one that suits your needs (CenterInside is a good one to start with).
If this doesn't work, you can always specify set heigh/widths of your image (e.g. layout_width="128dp).
Hi
I am reading XML from web and displaying them in a listview. The xml contain an image location so I am displaying the image as well along with text.
The image size is 48*48 px as suggested here. But when I see the list view in actual device, the image looks very small. Any idea about how to make that image a little bit big?? is there any standard image and text size??
This is my layout:-
<ImageView
android:id="#+id/logo"
android:layout_gravity="left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:id="#+id/name"
android:textSize="16sp"
android:textStyle="bold"
android:textColor="#2B2B2B"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="5dp"
android:layout_toRightOf="#id/logo"
/>
use dip instead of px. when you use dip, it appears more adjustable and good on different screens.
Use an ImageView like this:
Modify the width and height values to your liking, but use the dip measurement. With the scaleType property you can tell the framework to stretch your image.
Try adding
android:scaleType="center"
to your ImageView XML. This will not scale your image, but center it in your view.
It's bad practice on Android to declare layout size by pixels. This page is straight from Google on the subject: http://developer.android.com/guide/practices/screens_support.html I would do something like this
android:layout_height="wrap_content"
android:layout_width="fill_parent"
and see how that looks. Don't forget to test on multiple screen sizes before you finish. You can do that by creating different AVDs for the emulator.
You can use pixels if you really want to, but remember that its going to look different on different devices.
android:layout_height="96dip"
android:layout_width="fill_parent"