Java android change color in xml file

Question

I have this xml where I already set stroke color but I sometimes I want to change stoke color programmatically. The file name is dummy.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#ffffffff" />

    <stroke
        android:width="1dp"
        android:color="#ff000000" />

    <padding
        android:bottom="1dp"
        android:left="1dp"
        android:right="1dp"
        android:top="1dp" />

    <corners
        android:bottomLeftRadius="7dp"
        android:bottomRightRadius="7dp"
        android:topLeftRadius="7dp"
        android:topRightRadius="7dp" />
</shape>

I want to change color (stroke color) programmatically, how I can do this?

I use this xml here :

  <LinearLayout
                android:layout_marginTop="2dp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/a"
                android:layout_gravity="center"
                android:background="@drawable/dummy"
                android:layout_marginBottom="2sp"
                android:orientation="horizontal"
                android:padding="5dp">

                <RelativeLayout
                    android:id="@+id/serverStatusWrapper"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="2dp"
                    android:background="@drawable/shadow_green"
                    android:padding="2dp">

                    <ImageView
                        android:id="@+id/serverStatus"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_centerInParent="true"
                        android:antialias="true"
                        android:src="@drawable/ic_settings_input_antenna_white_24dp" />

                </RelativeLayout>

                <RelativeLayout
                    android:id="@+id/locationStatusWrapper"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:background="@drawable/shadow_red"
                    android:padding="2dp">

                    <ImageView
                        android:id="@+id/locationStatus"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_centerInParent="true"
                        android:antialias="true"
                        android:src="@drawable/ic_warning_white_24dp" />
                </RelativeLayout>

            </LinearLayout>

You need to create your drawable dynamically i have try this but not work for me — Sushant Gosavi
– Sushant Gosavi, Commented May 16, 2017 at 6:56

Abdul Kawee · Accepted Answer · 2017-05-16 06:54:19Z

3

LinearLayout linearLayout = (LinearLayout) findViewById(R.id.a);

You can change the stroke as

GradientDrawable drawable = (GradientDrawable)linearLayout.getBackground();
drawable.setStroke(3, Color.RED);

And can change solid color as

GradientDrawable drawable = (GradientDrawable)linearLayout.getBackground();
drawable.setColor(Color.RED);

Hope this helps

edited May 16, 2017 at 6:54

answered May 16, 2017 at 6:48

Abdul Kawee

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6 Comments

Kkk. Over a year ago

Ok but this xml I use in LinearLayout

Abdul Kawee Over a year ago

then change imageView to linearlayout

Kkk. Over a year ago

I try do this but I have nullpointer : GradientDrawable drawable = (GradientDrawable)linearLayout.getBackground();

Abdul Kawee Over a year ago

get the reference for linearlayout, let me edit the answerr

Abdul Kawee Over a year ago

@KrzysztofPokrywka i have edited my answer, hope it will work, dont forget to accept the answer and rate it up, if it worked :)

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