Friends How To Display Border To Imageview ?
I Want To Result Like Mobile gallery all image display with border.
plz give me ans thanks for advance....
You can create a resource (layer drawable xml) for your ImageView's "border" (actually background), and declare in your theme that the ImageView's background resource is the drawable xml.
If you need this "border" to be changed based on the ImageView's state (focused, selected, etc.), then you should create more layer drawables, and put them together into a selector xml (state drawable).
Then in your theme you should set the ImageView's background to be this selector.xml.
Update
Below is a sample of how to specify a simple border to your images, that will result in
You have to
create a new layer drawable file (image_border.xml),
modify/create your styles.xml file
modify/create your colors.xml file
modify your layout xml file (or your code) to apply the style to the ImageView.
res/drawable/image_border.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<gradient android:angle="90"
android:startColor="#color/image_border_start"
android:centerColor="#color/image_border_center"
android:endColor="#color/image_border_end" />
</shape>
</item>
<item android:top="2dp" android:left="2dp"
android:right="2dp" android:bottom="2dp">
<shape android:shape="rectangle">
<solid android:color="#color/default_back_color" />
</shape>
</item>
</layer-list>
res/values/styles.xml
Add the following lines:
<style name="myImageView">
<!-- 3dp so the background border to be visible -->
<item name="android:padding">3dp</item>
<item name="android:background">#drawable/image_border</item>
<item name="android:scaleType">fitCenter</item>
</style>
res/values/colors.xml
Add the following lines:
<color name="image_border_start">#40990000</color>
<color name="image_border_end">#FF660000</color>
<color name="image_border_center">#FFFF3333</color>
And finally specify the style of your ImageView in your layout xml:
<ImageView android:id="#+id/my_image"
android:layout_width="100dp" android:layout_height="100dp"
android:src="#drawable/efteling"
style="#style/myImageView" />
You can use this XML file as a drawable instead of multiple files, but this
file is placed in drawable folder. In ImageView use this XML file as a
background drawable, like: android:background="#drawable/following code file
name".
I hope this is helpful for you.
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#FFFFFF" />
<stroke android:width="1dp" android:color="#000000" />
<padding android:left="1dp" android:top="1dp" android:right="1dp"
android:bottom="1dp" />
</shape>
I tried all the above solutions but they didn't work for me!
So I figured out a simple solution to this! :-)
I remember that I read about FrameLayout of Android in the following article saying that it helps us to stack up our UI elements on top of each other in the same order we add them up.
Solution:
<FrameLayout
android:layout_width="112dp"
android:layout_height="112dp"
android:layout_marginLeft="16dp" <!-- May vary according to your needs -->
android:layout_marginRight="16dp" <!-- May vary according to your needs -->
android:layout_centerVertical="true">
<!-- following imageView acts as the boarder which sitting in the background of our main container ImageView -->
<ImageView
android:layout_width="112dp"
android:layout_height="112dp"
android:background="#000"/>
<!-- following imageView holds the image as the container to our image -->
<!-- layout_margin defines the width of our boarder, here it's 1dp -->
<ImageView
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_margin="1dp"
android:id="#+id/itemImageThumbnailImgVw"
android:src="#drawable/banana"
android:background="#FFF"/>
</FrameLayout>
Preview:
And that's it. You will get the following like imageView!
Pros and Cons:
I think this is pretty easy solution to be used in anywhere else and it's all the things you do sits in one single place so easier to modify it. However I don't like to having to add two ImageViews.
Related
I'm working on an Android application where I want to create a windowBackground with a centered element and a layout also with a centered element. I want these elements to be in the exact same position, with the layout overlapping the background. The problem I'm having is that the layout and the background seem to be calculating center differently (see image). Why is this happening, and what can I do to line the elements up?
This is what I see right now. The red box is created by the background and the green box is created by the foreground. Screenshot was created with a Nexus 5X API 26 emulator.
Foreground 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">
<View
android:background="#color/foreground_box"
android:layout_width="10dp"
android:layout_height="10dp"
android:layout_centerInParent="true" />
</RelativeLayout>
Background Drawable (applied via android:windowBackground in my theme)
<?xml version="1.0" encoding="UTF-8" ?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/background" />
<item android:gravity="center">
<shape
android:gravity="center"
android:shape="rectangle">
<solid android:color="#color/background_box" />
<size android:width="10dp"
android:height="10dp" />
</shape>
</item>
</layer-list>
For clarity, my colors file is
<?xml version="1.0" encoding="utf-8"?>
<resources>
...
<color name="background">#ffffff</color>
<color name="background_box">#AAFF0000</color>
<color name="foreground_box">#AA00FF00</color>
</resources>
Full source for this sample project is available at https://github.com/HofmaDresu/AndroidCenteredTest
The reason windowBackground includes both the heights 1) statusBar and 2) actionBar
Modify below line in your background.xml
<item android:gravity="center" android:top="80dp"> // 56 actionBarSize + 24 statusBarHeight
You may need to manage this programatically as statusBarHeight and actionBarSize varies based on device API/resolution.
Here is the result. For testing, have resized background size bit bigger so that overlapping between views and background become visible.
It is probably because of the extra space taken up by the ActionBar in the foreground.
To fix this, you can add a margin to your View in the foreground layout as:
android:layout_marginBottom="?android:attr/actionBarSize"
After test it in AS, I can say you that the right code for you background_drawable is this:
<?xml version="1.0" encoding="UTF-8" ?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/background" />
<item android:gravity="center" android:bottom="48dp">
<shape
android:gravity="center"
android:shape="rectangle">
<solid android:color="#color/background_box" />
<size
android:width="10dp"
android:height="10dp" />
</shape>
</item>
using android:top, the red square go more down than center. Need to use android:bottom instead to center background. By my tests results that 48dp is the right value.
I would like to add padding or space to the logo on both the sides and the code is added here.
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" android:gravity="fill">
<item android:drawable="#color/ns_theme"></item>
<item>
<bitmap android:gravity="center" android:src="#drawable/logo" />
</item>
</layer-list>
I had the same problem, I tried to add padding to the item but it didn't change anything.
<item
android:left="16dp"
android:right="16dp">
<bitmap android:gravity="center"
android:src="#drawable/splash"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"/>
</item>
The problem was gravity="center", with it the padding were not applied.
Try using android: gravity = "clip_horizontal"
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/splash_color" />
<item
android:left="16dp"
android:right="16dp">
<bitmap android:gravity="clip_horizontal"
android:src="#drawable/splash"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"/>
</item>
</layer-list>
Use
android:bottom=""
android:left=""
android:right=""
android:top=""
Try this
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="fill">
<item android:drawable="#color/ns_theme"></item>
<item
android:bottom="20dp"
android:left="20dp"
android:right="20dp"
android:top="20dp">
<bitmap
android:gravity="center"
android:src="#drawable/logo" />
</item>
</layer-list>
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/ns_theme" />
<item
android:drawable="#drawable/ic_logo"
android:left="#dimen/_16sdp"
android:right="#dimen/_16sdp" />
</layer-list>
The problem is probably that your logo is too big (The image file you are using has a pixel width that exceeds the pixel density of the device you are running it on).
Whether or not that is the case, it would probably be better to approach the problem considering the possibility that it could be run on ANY Android device with ANY screen size.
Considering that, there are several options better than simply adding padding in xml... For example, you could:
1) Wrap the image inside another view object that you can control the size and postion of as Bhavik Makwana suggested.
2) Just simply re-edit/resample your image to match the width of your target device and include the white space you desire in the image itself.
3) Design full splash screens that match the entire screen exactly (which combine foreground and background into one image), for example one with 1080 x 1920 resolution, and others for other screen sizes. That way you can control exactly how you want it to look, and the resolution will be 1-1 with no anti-aliasing or resampling.
4) Use this "9-patch" image approach to define an absolute width and height for your logo, but allow stretching of the white space around it to accommodate different screen sizes.
or, finally, the best way:
5) Use a constraint layout with guidelines in order to define the width of your logo in terms of percentage of parent width rather than absolute value.
Some other advice: Unless you are using technique #2 above, make sure you are using a logo.png file like this:
... NOT like this:
KaBOOYOW!
-Boober.
try this code:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/colorPrimary" />
<item>
<bitmap android:src="#drawable/logo"
android:gravity="center" />
</item>
</layer-list>
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:gravity="center"
android:layout_height="match_parent"
android:layout_width="match_parent">
<item
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp"
android:gravity="center"
android:background="#mipmap/logo" />
</layer-list>
I have this:
round_button.xml
<xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<shape android:shape="oval">
<solid android:color="#dec60000"/>
<size android:width="150dp" android:height="150dp"/>
</shape>
</item>
<item android:state_pressed="false">
<shape android:shape="oval">
<solid android:color="#860000"/>
<size android:width="150dp" android:height="150dp"/>
</shape>
</item>
My Button:
<Button
android:id="#+id/incrementBTN"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#drawable/round_button"
android:onClick="onClick"
android:soundEffectsEnabled="true"
android:text="0"
android:textSize="50sp"
tools:ignore="HardcodedText" />
Dynamically, I want to change the background color (which is defined in the round_button xml) programmatically. Is there a way I can do this?
If you want to define certain states for your button, you could set them all in xml, without having to do it programmatically (if you do, you can indeed set a filter, but it can get messy if you have many states and conditions IMO).
I'll detail the steps here:
1) Creating a xml with the states you want
You can create a xml with a selector in your drawable folder with the defined states. As an example,
button_bkg.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/bkg_is_pressed" android:state_pressed="true"/>
<item android:drawable="#drawable/bkg_is_disabled" android:state_enabled="false"/>
<item android:drawable="#drawable/bkg_default"/>
</selector>
Let's call this file button_bkg.xml. In the example above, I have listed 3 states: pressed, disabled and default, which means that, when the button is pressed, it will assume the bkg_is_pressed background and, when I set the button to disabled (either in xml or programmatically through setEnabled(boolean), it will assume bkg_is_disabled background.
2) Creating the backgrounds
Now you will define what you want the background to be in the xml files you defined (bkg_is_pressed, bkg_is_default, bkg_is_pressed). In your case, in example, you would take each shape defined in your round_button.xml file and separate them into each one of the xml files you defined for the states. In my case, I defined a layer-list:
bkg_is_pressed.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<corners android:radius="#dimen/button_corner_radius"/>
<solid android:color="#color/color_alert"/>
<stroke
android:width="#dimen/universal_1_pixel"
android:color="#color/color_gray_dark"/>
</shape>
</item>
<item>
<shape android:shape="rectangle">
<corners android:radius="#dimen/button_corner_radius"/>
<solid android:color="#color/color_mask_highlighted"/>
</shape>
</item>
</layer-list>
You will do that for each of the states.
It is important to note that, if you are going to build for API 21+, you can define a ripple effect by creating ANOTHER button_bkg.xml file in your drawables-v21 folder, which would be like this:
button_bkg.xml (in your drawable-v21 folder)
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/bkg_is_disabled" android:state_enabled="false" />
<item android:drawable="#drawable/bkg_is_pressed" />
To use the ripple, you can define a color as explained below:
bkg_is_pressed.xml (in your drawable-v21 folder)
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="#color/color_mask_highlighted">
<item android:drawable="#drawable/bkg_is_default" />
</ripple>
You only have to put the button_bkg.xml and the bkg_is_pressed.xml into your drawable-v21 folder file. In my case, bkg_is_default and bkg_is_disabled.xml were the same for both 21+ and 21- APIs, so I didn't add it to my drawable-v21 folder, I just created it in the drawable folder.
I want to emphasize that you STILL need the other files in your regular drawable folder so that devices with API 21- will work properly.
3) Assigning that background to your button
Lastly, you just have to define that background to your button:
<Button
...
android:background="#drawable/button_bkg
/>
So, there you have it. This way, you don't need to set the styles programmatically, you can just define all the backgrounds (according to your states) in the xml files.
But, if you also prefer to set them all programmatically, you can do the same, just use setBackground and use the xml files you defined and apply the state logic you want to it (if button is pressed, setBackground(bkg_is_pressed) and so on)
I hope that helps, let me know if that works for you.
I solved it by setting a ColorFilter:
Drawable mDrawable = context.getResources().getDrawable(R.drawable.balloons);
mDrawable.setColorFilter(new PorterDuffColorFilter(0xffff00,PorterDuff.Mode.MULTIPLY));
myButton.setResource(mDrawable);
You could construct the shapes from code, depending on the color you need to use, create a StateListDrawable from those and set it as your buttons background.
Here's my aching point. I'm new to android developoment and I want to create the splash screen to an app. presently, after searching in this forum, i found methods of implementing the splash screen from a picture but that's not what i want. I want the splash screen to be a color with a varying gradient. Attached to this question is a picture to illustrate what i mean.
Unfortunately, couldn't paste an image due to my low reputation points. Nonetheless, here's a link to an gradient image.
Further explaining, i want the color to be generated by either java or xml code dynamically so that, I won't have to bother about different screen sizes as all I'll have to do is to generate everything for full screen display. What's I'm trying to avoid is using picture assets if possible.
Help Plz. Thanks
create a shape, add it to drawables like : <shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:startColor="#color/gradient_start" <!--this first color -->
android:endColor="#color/gradient_end" <!--this second color -->
android:angle="-270" /> <!--gradient angle -->
</shape>
and then on your splash.xml background, set background to the shape
add
<LinearLayout
android:id="#+id/ranking_order"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/list_grad"
/>
Also gradients and colors may be declared directly into splash.xml
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<!--<color android:color="#2196F3"/>-->
<shape android:shape="rectangle">
<gradient
android:startColor="#2196F3"
android:endColor="#1976D2"
android:angle="-90"
/>
</shape>
</item>
<item>
<bitmap
android:src="#drawable/logo"
android:gravity="center"
/>
</item>
</layer-list>
I want to create a small icon button as it is described in this chapter of the material guideline, but I can't find any explanation on how to do that.
Here is the button I want to transform to an icon toggle:
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_row="4"
android:layout_column="0"
android:id="#+id/btn_delete"
android:drawableStart="#drawable/ic_delete"
android:drawableLeft="#drawable/ic_delete"
style="?android:attr/borderlessButtonStyle"/>
How can I change my xml to have an icon instead ?
drawable_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- Put your color for ripple effect -->
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="#android:color/holo_green_dark">
<item android:id="#android:id/mask">
<shape android:shape="oval" >
<!-- Color not displayed,just to tell ripple about the bounds -->
<solid android:color="#android:color/black" />
</shape>
</item>
<!-- And your drawable -->
<item android:drawable="#drawable/btn_star_off_normal_holo_dark" />
</ripple>
Use this as your background for button
android:background="#drawable/drawable_bg"
And read this about RippleDrawable It has selectors already.
You need to download that icon (assuming it is named my_button_image.png) to your drawable directory and need to add the drawable attribute to your button,
android:background="#drawable/my_button_image"