Android: Using selector to set background color for image view

Question

I am trying to set the background color of an image view.

Answer 1

Best way to implement the selector is by using the xml instead of using programatic way as its more easy to implemnt with xml.

    <?xml version="1.0" encoding="utf-8"?>    
<selector xmlns:android="http://schemas.android.com/apk/res/android">
       <item android:state_selected="true">
    <color android:color="@color/Violet" />
</item>
<item android:state_pressed="true">
    <color android:color="@color/red" />
</item>
<item>
    <color android:color="@color/white" />
</item>

    </selector>

For more information i implemented using this link http://www.blazin.in/2016/03/how-to-use-selectors-for-botton.html

Answer 2

 <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:drawable="@color/black_mediam" />
    <item android:state_pressed="true" android:drawable="@color/black_mediam" />
    <item android:drawable="@color/menu_bg" />
</selector>

it is working for ImageView and Button

      <Button
            android:layout_weight="1"
            android:background="@drawable/image_selecter"
            android:id="@+id/btn_delete_gif"
            android:textAllCaps="false"
            android:text="Yes"
            android:textSize="@dimen/_13sdp"
            android:textColor="@android:color/white"
            android:layout_width="175dp"
            android:layout_height="wrap_content" />


     <ImageView
            android:padding="@dimen/_3sdp"
            android:background="@drawable/image_selecter"
            android:layout_weight="1"
            android:layout_alignParentRight="true"
            android:id="@+id/delete_gif_giflistview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_delete_gif"
            android:layout_marginLeft="1dp" />

Answer 3

You cannot use background tag in selector file.Instead,you can use it like:

1. Create a color.xml in "values" folder under "res" folder:

color.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <drawable name="color_one">#110000</drawable>
    <drawable name="color_two">#001111</drawable>
    <drawable name="color_three">#001100</drawable>    
</resources>

2. Now,Use this file in your selector file like:

 <?xml version="1.0" encoding="utf-8"?> 
 <selector xmlns:android="http://schemas.android.com/apk/res/android">     
     <item android:state_selected="true" android:drawable="@drawable/color_one" />    
     <item android:state_pressed="true" android:drawable="@drawable/color_two" />
     <item android:drawable="@drawable/color_three"/>
 </selector>

Answer 4

Your Logcat:

E/AndroidRuntime( 4196): Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #3: tag requires a 'drawable' attribute or child tag defining a drawable

LogCat is pointing out that your <item> tag should include android:drawable tag.

You selector file should look like this:

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android">     
     <item android:state_selected="true" android:drawable="@color/Violet" />    
     <item android:state_pressed="true" android:drawable="@color/red" />
     <item android:drawable="@color/white" />
</selector>

Answer 5

The simplest way to do what you want is adding a child node to the item instead of using its drawable attribute:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true">
        <color android:color="@color/Violet" />
    </item>
    <item android:state_pressed="true">
        <color android:color="@color/red" />
    </item>
    <item>
        <color android:color="@color/white" />
    </item>
</selector>

Here you can use direct values for color as well (e.g. #FFFF0000 instead of "@color/red") to save yourself from defining many color resources.