Develop Reference

Clickable icon on image

I want to add a clickable “favorite icon ❤️“ on the top of the ImageView for an Android project. I found similar to this in Zillow application as in the attached image. Any help please?
image from Zillow

use checkbox for this, use 2 icon one is favorite (full heart) and the other is an unfavourite icon(heart with the only border) and set In the selector
set selector file in android:button property in the check box
<androidx.appcompat.widget.AppCompatCheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:button="#drawable/selector_checkbox"/>
Here is the selector file,
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true"
android:drawable="#drawable/checkbox_favorite" />
<item
android:state_checked="false"
android:drawable="#drawable/checkbox_unfavourite" />
</selector>

Follow this code ,
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="center"// your scale image on your need!
android:src="your_image" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_baseline_favorite_24"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:clickable="true"// doesnt need just hard code like setOnClick...
android:layout_alignParentEnd="true"
android:layout_margin="16dp"/>
</RelativeLayout>

Android ImageButton not enforcing transparency in RelativeLayout

I am trying to place two image buttons and some text on a single line. Here is the XML for the layout:
<?xml version="1.0" encoding="utf-8"?>
<mycompany xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="28dp"
android:layout_marginTop="5dp"
android:orientation="horizontal">
<ImageButton
android:id="#+id/sectionDelete"
android:layout_width="35dp"
android:layout_height="28dp"
android:layout_alignParentLeft="true"
android:src="#drawable/button_delete" />
<TextView
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/sectionDelete"
android:text="test"
android:textAllCaps="true"
android:textColor="#color/navigation_bar"
android:textSize="16sp"
android:textStyle="bold" />
<ImageButton
android:id="#+id/sectionAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:background="#drawable/button_add" />
</RelativeLayout>
<View
android:id="#+id/line"
android:layout_marginTop="8dp"
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#android:color/darker_gray" />
</LinearLayout>
</mycompany>
The selector XML for each of the buttons in drawable:
button_delete.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="#drawable/delete_button_pressed"
android:state_pressed="true" />
<item android:drawable="#drawable/delete_button"
android:state_focused="true" />
<item android:drawable="#drawable/delete_button" />
</selector>
button_add.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="#drawable/button_add_pressed"
android:state_pressed="true" />
<item android:drawable="#drawable/button_add_normal"
android:state_focused="true" />
<item android:drawable="#drawable/button_add_normal" />
</selector>
In the builder all looks well:
But in the application the gray background is lost and the edges of the image (which are transparent) are shown, but only for the first image:
Strangely, the first image button is not recognizing the transparent background of the image. Additionally I needed to mess with the width and height of the RelativeLayout and the first ImageButton to even get it close to the right size. With the 2nd I did not have to do anything. There is nothing special with the first image.
Here are the images from the directory:
One last issue - How do you make the text wrap before the 2nd image if it is too long for the space? Right now it writes under the 2nd image before wrapping:
Here are all the delete images. Seem to have transparent backgrounds, but I am far from a Gimp expert. Also not sure if StackOverflow keeps the original..
Update
I have verified the images are transparent. The image still has the white background. I have also updated the XML to look like this:
<?xml version="1.0" encoding="utf-8"?>
<mycompany xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:orientation="horizontal">
<ImageButton
android:id="#+id/sectionDelete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:background="#drawable/button_delete" />
<TextView
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/sectionDelete"
android:layout_toEndOf="#+id/sectionDelete"
android:layout_toLeftOf="#+id/sectionAdd"
android:text="test"
android:textAllCaps="true"
android:textColor="#color/navigation_bar"
android:textSize="16sp"
android:textStyle="bold" />
<ImageButton
android:id="#+id/sectionAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:background="#drawable/button_add" />
</RelativeLayout>
<View
android:id="#+id/line"
android:layout_marginTop="8dp"
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#android:color/darker_gray" />
</LinearLayout>
</mycompany>

You should use:
<ImageButton
android:id="#+id/sectionDelete"
android:layout_width="35dp"
android:layout_height="28dp"
android:layout_alignParentLeft="true"
android:src="#drawable/button_delete"
android:background="#android:color/transparent"/>

Use "#null" like background on ImageButton:
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="#drawable/bkash"
android:id="#+id/bid1"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:background="#null" />

You haven't included the actual PNG file you are using as an icon for your delete button (screenshot from Windows's Explorer showing this file on your disk isn't quite enough), but I am almost sure that this file lacks an alpha channel. Instead, there is a white color on every pixel you'd like to be set with zero alpha channel value.
Opening your graphic in some image editor and changing these white pixels to transparent will solve your problem, but as for the reason why your layout "looks different" in builder than on your device, it's because there is a default theme applied by the system to every app, you can read more about it here: https://developer.android.com/guide/topics/ui/look-and-feel/themes.html
This default, OS and device specific set of values determines things that aren't determined by app's authors.
In the case of your device, its OS determined app's background color to be gray, which wasn't the case with your builder. Your builder chose the background to be white. Your delete button's graphic never was transparent, but on the white background of your builder it looked like it was.
To make it look like on builder, you need to specifically apply the background by yourself to the root of your view. In this case, it's a LinearLayout which should look like this:
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffffff">

1) #DimDim had the right solution, if it didn't work, the delete button may have white background in the image, cross check with a png viewer.
2) To prevent overflow of text, try this
<TextView
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/sectionDelete"
android:layout_toLeftOf="#+id/sectionAdd"
android:text="test"
android:textAllCaps="true"
android:textColor="#color/navigation_bar"
android:textSize="16sp"
android:textStyle="bold" />
And put the sectionAdd Image button above this textview in the XML as this textview needs reference to the sectionAdd.

Android app layout background shows through controls in layout

I have an Android app with a GridView where each item is a LinearLayout of two Buttons and two TextViews. When I set the LinearLayout's background color to white, the buttons are grey. However, if I change the background color, the surface of the buttons also get tinted with that color. How can I prevent this?
Example with strong color:
Buttons should be light gray, not reddish-gray.
Grid item layout 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="wrap_content" android:orientation="horizontal"
android:background="#drawable/grid_cell_max">
<Button
android:layout_width="50dp"
android:layout_height="50dp"
android:text="+"
android:includeFontPadding="false"
android:paddingBottom="4dp"
android:paddingTop="4dp"
android:id="#+id/buttonPlus"
android:layout_gravity="center_vertical"
android:textSize="24sp"
android:gravity="center_vertical|center_horizontal" />
<Button
android:layout_width="50dp"
android:layout_height="50dp"
android:text="-"
android:textSize="24sp"
android:includeFontPadding="false"
android:paddingBottom="4dp"
android:paddingTop="4dp"
android:id="#+id/buttonMinus"
android:layout_gravity="center_vertical"
android:gravity="center_vertical|center_horizontal" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="8dp"
android:paddingTop="1dp"
android:paddingBottom="2dp"
android:orientation="vertical">
<TextView
android:id="#+id/buildingTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:lines="1"
android:shadowDx="1"
android:shadowDy="1"
android:shadowRadius="2"
android:shadowColor="#android:color/darker_gray"
android:ellipsize="end"
android:textSize="15sp"
android:textStyle="bold"/>
<TextView
android:id="#+id/buildingInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="11sp"
android:lines="2"
android:ellipsize="end"
android:lineSpacingExtra="-2dp"/>
</LinearLayout>
</LinearLayout>
drawable/grid_cell_max.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape= "rectangle" >
<solid android:color="#ffe6ffe3"/>
<stroke android:width="1dp" android:color="#c0c0c0"/>
</shape>

Unfortunately, I don't think there's an easy way to do this. The way I resolved this issue was:
Use Android holo colors generator to generate new resources:
Make sure to select the color you need for your button (under 'Theme Name')
Make sure to switch 'Colored Button' to 'Yes'
Download the archive and unpack it.
Merge only the drawable folders from the unpacked project into yours (only the button image resources and the button selector xml file - located in drawable)
Set the background of your buttons to:
android:background="#drawable/apptheme_btn_default_holo_light"
You'll now have a opaque button with the color you selected from the android holo colors generator.
If you want all your app buttons to behave the same way, you'll have to update the app theme. To do this, follow the steps above and afterwards update your 'styles.xml' file:
<style name="AppTheme" parent="android:Theme.Holo.Light">
<item name="android:buttonStyle">#style/ButtonAppTheme</item>
</style>
<style name="ButtonAppTheme" parent="android:Widget.Holo.Light.Button">
<item name="android:background">#drawable/apptheme_btn_default_holo_light</item>
</style>
Also, if you do this, you can remove the button background from xml. I couldn't find another solution if you want to keep the 'Theme.Holo.Light' app theme.

ImageView is not highlighting on click

I am designing an app for multiple devices.In that I am using a imageview and using selector i am setting the background image depends on the state.I works fine for all the devices except only one 10 inch device.
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true" >
<LinearLayout
android:layout_width="145dp"
android:layout_height="239dp"
android:layout_marginRight="6dp"
android:background="#drawable/common_selector_thumbnail_shadow_title_background"
android:gravity="center"
android:orientation="vertical"
android:paddingLeft="5dp"
android:paddingRight="5dp" >
<FrameLayout
android:layout_width="130dp"
android:layout_height="186dp"
android:layout_marginTop="5dp"
android:background="#color/RGB_100_215_216_217" >
<ImageView
android:id="#+id/seasonal_favorites_default_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="center"
android:src="#drawable/tw_noitem_movie" />
</FrameLayout>
<TextView
android:id="#+id/seasonal_favorites_list_text"
android:layout_width="140dp"
android:layout_height="43dp"
android:duplicateParentState="true"
android:ellipsize="end"
android:gravity="center_vertical"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:singleLine="true"
android:textColor="#drawable/common_selector_thumbnail_shadow_title_textcolor"
android:textSize="18dp" />
</LinearLayout>
</FrameLayout>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#drawable/thumbnail_title_bg_focus" android:state_focused="true" android:state_pressed="true"/>
<item android:drawable="#drawable/thumbnail_title_bg_focus" android:state_pressed="true"/>
<item android:drawable="#drawable/thumbnail_title_bg_focus" android:state_focused="true"/>
<item android:drawable="#drawable/thumbnail_title_bg"/>
</selector>
Thanks in advance.

Probabilly you have to put in your manifest file: hardwareAccelerated="true"
Try that and let me know if it worked!

Use ImageButton there are two methods setBackgroundResource, setImageResource to set resources for button(which one will be pressed) and for image itself

You need to add android:clickable="true" to the LinearLayout or set a OnClickListener there. Otherwise your selector background does not get activated.

Use ImageButton instead of ImageView to get the selector work.

If you can provide the different states of the image then see this
post
Otherwise...
Use a LayerDrawable for the image source. One layer is the actual image, the other layer is a state list selector.
LayerDrawable d = new LayerDrawable(new Drawable[]{getResources().getDrawable(R.drawable.my_image), getResources().getDrawable(R.drawable.my_selector_list)});
imageView.setImageDrawable(d);
Or you can define a layer drawable XML resource and use that in your layout XML.

Why spinner is so big?

I'm developing an Android application and I have a problem with designing layouts:
With this layout:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp" >
<TextView
android:id="#+id/textUploadPhotos"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.4"
android:text="#string/layout_upload_photos"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Spinner
android:id="#+id/spinUploadPhotos"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.7"
android:background="#drawable/spin_selector" />
</LinearLayout>
And the spin_selector.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="#drawable/select" android:state_pressed="true"/>
<item android:drawable="#drawable/select" android:state_focused="true"/>
<item android:drawable="#drawable/select"/>
</selector>
I get this:
#drawable/select is this one:
How can set spinner size to #drawable/select height?

Use 9 patch as background of your spinner. I think this will be interesting for you: http://adanware.blogspot.com/2012/03/android-custom-spinner-with-custom.html

You image seems to be the culprit. If you can't use a 9-patch png, try setting the height attribute of the spinner to a better value. Perhaps, right now, you have set it to wrap_content.
Or, may be you can try reducing the height of the image itself.