How to change shape color dynamically?

Question

I have

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
   android:shape="rectangle">
    <solid
       android:color="#FFFF00" />
    <padding android:left="7dp"
        android:top="7dp"
        android:right="7dp"
        android:bottom="7dp" />
</shape>

<TextView
    android:background="@drawable/test"
    android:layout_height="45dp"
    android:layout_width="100dp"
    android:text="Moderate"
/>

So now I want this shape to change colors based on information I get back from a web service call. So it could be maybe yellow or green or red or whatever depending on the color I receive from the web serivce call.

How can I change the color of the shape? Based on this information?

Titulary

As appointed by @Couitchy method View.getBackground() returns a GradientDrawable and not a ShapeDrawable causing the app to crash at runtime, due to invalid cast when trying to get the reference and set the color programmatically. [Android Shape doc]( developer.android.com/guide/topics/resources/…) states: COMPILED RESOURCE DATATYPE: Resource pointer to a GradientDrawable. – Trakas

Possible duplicate of Set android shape color programmatically – Idel

Answer 1

You could modify it simply like this

GradientDrawable bgShape = (GradientDrawable)btn.getBackground();
bgShape.setColor(Color.BLACK);

Intersidereal

What is btn.getBackground? – Titulary

btn can be any view for which you set the shape drawable from xml. So you can get the drawable back using getBackground() on that view and change its color. – Intersidereal

Hmm having a hard time to convert this code to monodroid ShapeDrawable bgShape = (ShapeDrawable) Resources.GetDrawable(Resource.Drawable.test); just crashes – Titulary

I am getting java.lang.ClassCastException: android.graphics.drawable.GradientDrawable cannot be cast to android.graphics.drawable.ShapeDrawable when trying this suggestion. – Dwain

getting cast exception – Lytic

Does not work. You will get a cast error. Needs a fix or another answer accepted – Neutrino

This works just fine. The previous comments are outdates since the answer got edited! – Gomphosis

shoul use GradientDrawable bgShape = (GradientDrawable)btn.getBackground().getCurrent(); – Cochineal

Works fine but take care that it will change the shape color so next time you use it, it will have the latest color you set. So you need to set the color every time you use this shape drawable. – Harless

It works only if your drawable XML has only the shape tag inside otherwise it will have a cast error. – Squamosal

I got a java.lang.ClassCastException: android.graphics.drawable.StateListDrawable cannot be cast to android.graphics.drawable.GradientDrawable but (GradientDrawable)btn.getBackground().getCurrent(); ended up working – Dardanelles

you can try for GradientDrawable bgShape = (GradientDrawable) bubble_text.getBackground().mutate(); bgShape.setColor(color); bgShape.setStroke(1, color); – Claudianus

How to get that change color drawable shape as a Drawable? – Millard

Answer 2

For me, it crashed because getBackground returned a GradientDrawable instead of a ShapeDrawable.

So i modified it like this:

((GradientDrawable)someView.getBackground()).setColor(someColor);

Shaylyn

Answer 3

This works for me, with an initial xml resource:

example.setBackgroundResource(R.drawable.myshape);
GradientDrawable gd = (GradientDrawable) example.getBackground().getCurrent();
gd.setColor(Color.parseColor("#000000"));
gd.setCornerRadii(new float[]{30, 30, 30, 30, 0, 0, 30, 30});
gd.setStroke(2, Color.parseColor("#00FFFF"), 5, 6);

Result of the above: https://i.stack.imgur.com/hKUR7.png

Yearn

This is the correct answer. Both the upwoted above answers were not worked for me. I am getting exception on both of it. – Pharaoh

Answer 4

You can build your own shapes in Java. I did this for an iPhone like Page Controler and paint the shapes in Java:

/**
 * Builds the active and inactive shapes / drawables for the page control
 */
private void makeShapes() {

    activeDrawable = new ShapeDrawable();
    inactiveDrawable = new ShapeDrawable();
    activeDrawable.setBounds(0, 0, (int) mIndicatorSize,
            (int) mIndicatorSize);
    inactiveDrawable.setBounds(0, 0, (int) mIndicatorSize,
            (int) mIndicatorSize);

    int i[] = new int[2];
    i[0] = android.R.attr.textColorSecondary;
    i[1] = android.R.attr.textColorSecondaryInverse;
    TypedArray a = this.getTheme().obtainStyledAttributes(i);

    Shape s1 = new OvalShape();
    s1.resize(mIndicatorSize, mIndicatorSize);
    Shape s2 = new OvalShape();
    s2.resize(mIndicatorSize, mIndicatorSize);

    ((ShapeDrawable) activeDrawable).getPaint().setColor(
            a.getColor(0, Color.DKGRAY));
    ((ShapeDrawable) inactiveDrawable).getPaint().setColor(
            a.getColor(1, Color.LTGRAY));

    ((ShapeDrawable) activeDrawable).setShape(s1);
    ((ShapeDrawable) inactiveDrawable).setShape(s2);
}

hope this helps. Greez Fabian

Delarosa

Answer 5

Maybe someone else need to change color in the XML without create multiple drawables like I needed. Then make a circle drawable without color and then specify backgroundTint for the ImageView.

circle.xml

<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
</shape>

And in your layout:

<ImageView
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:background="@drawable/circle"
    android:backgroundTint="@color/red"/>

Edit:

There is a bug regarding this method that prevents it from working on Android Lollipop 5.0 (API level 21). But have been fixed in newer versions.

Expressly

Answer 6

    LayerDrawable bgDrawable = (LayerDrawable) button.getBackground();
    final GradientDrawable shape = (GradientDrawable)
            bgDrawable.findDrawableByLayerId(R.id.round_button_shape);
    shape.setColor(Color.BLACK);

Exquisite

Where should round_button_shape define in shape xml file ? – Cryogen

Answer 7

circle.xml (drawable)

<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">

<solid
    android:color="#000"/>

<size
    android:width="10dp"
    android:height="10dp"/>
</shape>

layout

<ImageView
      android:id="@+id/circleColor"
      android:layout_width="15dp"
       android:layout_height="15dp"
      android:textSize="12dp"
       android:layout_gravity="center"
       android:layout_marginLeft="10dp"
      android:background="@drawable/circle"/>

in activity

   circleColor = (ImageView) view.findViewById(R.id.circleColor);
   int color = Color.parseColor("#00FFFF");
   ((GradientDrawable)circleColor.getBackground()).setColor(color);

Jeddy

Not a perfect one, but helped me to get the solution. – Chicky

Answer 8

This solution worked for me using the android sdk v19:

//get the image button by id
ImageButton myImg = (ImageButton) findViewById(R.id.some_id);

//get drawable from image button
GradientDrawable drawable = (GradientDrawable) myImg.getDrawable();

//set color as integer
//can use Color.parseColor(color) if color is a string
drawable.setColor(color)

Verbalism

Answer 9

If you have an imageView like this:

   <ImageView
    android:id="@+id/color_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginRight="10dp"
    android:src="@drawable/circle_color"/>

which give it a drawable shape as src, you can use this code to change shape's color:

ImageView iv = (ImageView)findViewById(R.id.color_button);
GradientDrawable bgShape = (GradientDrawable)iv.getDrawable();
bgShape.setColor(Color.BLACK);

Dorthea

Answer 10

The simplest way to fill the shape with the Radius is:

XML:

<TextView
    android:id="@+id/textView"
    android:background="@drawable/test"
    android:layout_height="45dp"
    android:layout_width="100dp"
    android:text="Moderate"/>

Java:

(textView.getBackground()).setColorFilter(Color.parseColor("#FFDE03"), PorterDuff.Mode.SRC_IN);

Rupert

Answer 11

My shape xml :

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid  android:color="@android:color/transparent" />
<stroke android:width="0.5dp" android:color="@android:color/holo_green_dark"/>
</shape>

My activity xml :

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="cn.easydone.test.MainActivity">

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />
    <TextView
        android:id="@+id/test_text"
        android:background="@drawable/bg_stroke_dynamic_color"
        android:padding="20dp"
        android:text="asdasdasdasd"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</android.support.design.widget.AppBarLayout>

<android.support.v7.widget.RecyclerView
    android:id="@+id/recycler_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    android:clipToPadding="false"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

My activity java :

 TextView testText = (TextView) findViewById(R.id.test_text);
 ((GradientDrawable)testText.getBackground()).setStroke(10,Color.BLACK);

Result picture : result

Crissycrist

Answer 12

I try Ronnie's answer, and my app crashed. Then I check my drawable xml. It looks like this:

<selector >...</selector>

. I changed it to this:(also changed attributes)

<shape> ... </shape>

It works.

For those who encounter the same problem.

Davidoff

Answer 13

drawable_rectangle.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <solid android:color="@android:color/transparent" />

    <stroke
        android:width="1dp"
        android:color="#9f9f9f" />

    <corners
        android:bottomLeftRadius="5dp"
        android:bottomRightRadius="5dp"
        android:topLeftRadius="5dp"
        android:topRightRadius="5dp" />

</shape>

TextView

<androidx.appcompat.widget.AppCompatTextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/drawable_rectangle"
    android:gravity="center"
    android:padding="10dp"
    android:text="Status"
    android:textColor="@android:color/white"
    android:textSize="20sp" />


public static void changeRectangleColor(View view, int color) {
    ((GradientDrawable) view.getBackground()).setStroke(1, color);
}    

changeRectangleColor(textView, ContextCompat.getColor(context, R.color.colorAccent));

Samford

Answer 14

You can use a binding adapter(Kotlin) to achieve this. Create a binding adapter class named ChangeShapeColor like below

@BindingAdapter("shapeColor")

// Method to load shape and set its color 

fun loadShape(textView: TextView, color: String) {
// first get the drawable that you created for the shape 
val mDrawable = ContextCompat.getDrawable(textView.context, 
R.drawable.language_image_bg)
val  shape =   mDrawable as (GradientDrawable)
// use parse color method to parse #34444 to the int 
shape.setColor(Color.parseColor(color))
 }

Create a drawable shape in res/drawable folder. I have created a circle

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval" >
<solid android:color="#anyColorCode"/>

<size
    android:width="@dimen/dp_16"
    android:height="@dimen/dp_16"/>
</shape>

Finally refer it to your view

  <TextView>
   .........
  app:shapeColor="@{modelName.colorString}"
 </Textview>

Alleneallentown