Android change color stroke (border) programmatically

Question

I try change color \"stroke\", through \"GradientDrawable\" but not work.

also, I don\'t know how get id stroke, and change only stroke (I see google, all example a

Answer 1

Instead of this you may be use any layout and apply your xml as selector and for that layout you apply dynamic backgrounds via GradientDrawable.

For example , main.xml

           <RelativeLayout 
            android:orientation="vertical"
            android:id="@+id/mainLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/shapes"/>

Then your xml ,shapes.xml

            <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
                <item android:id="@+id/selectable_kachel_shape" >
                    <shape
                        android:innerRadius="0dp"
                        android:shape="ring"
                        android:thicknessRatio="2"
                        android:useLevel="false" >
                        <stroke android:width="11dp" android:color="#ff00ffff"/>
                        <gradient
                            android:centerColor="#FFFFFF"
                            android:endColor="#FFFFFF"
                            android:startColor="#FFFFFF"
                            android:type="sweep" />
                    </shape>
                </item>
                </layer-list>

And write following code in your activity.

    RelativeLayout  mainLayout= (RelativeLayout ) findViewById(R.id.mainLayout);
    GradientDrawable gd = new GradientDrawable();
    gd.setColor(Color.RED);
    gd.setCornerRadius(10);
    gd.setStroke(2, Color.WHITE);
    mainLayout.setBackgroundDrawable(gd);

For more GradientDrawable use the link http://developer.android.com/reference/android/graphics/drawable/GradientDrawable.html

Hopes this will help you.