GradientDrawable
A GradientDrawable is Drawable with a color gradient for buttons, backgrounds, etc.It can be defined in an XML file with the <shape> element. For more information, see GradientDrawable.
res/drawable/stroke_background.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="3dp"
android:color="@android:color/holo_orange_dark" />
<corners
android:bottomRightRadius="10dp"
android:bottomLeftRadius="10dp"
android:topLeftRadius="10dp"
android:topRightRadius="10dp"/>
</shape>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="@android:color/transparent" />
<stroke
android:width="3dp"
android:color="@android:color/holo_orange_dark" />
<corners
android:bottomRightRadius="10dp"
android:bottomLeftRadius="10dp"
android:topLeftRadius="10dp"
android:topRightRadius="10dp"/>
</shape>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
android:gravity="center_horizontal"
tools:context="quizcounter.compete.geeks.vectordrawablecolorchange.MainActivity">
<Button
android:layout_marginTop="10dp"
android:id="@+id/button"
android:text="Change Stroke Color"
android:layout_width="wrap_content"
android:layout_marginBottom="30dp"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView "
android:padding="10dp"
android:textColor="@android:color/black"
android:background="@drawable/stroke_background"
/>
</LinearLayout>
<LinearLayout 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:orientation="vertical"
android:gravity="center_horizontal"
tools:context="quizcounter.compete.geeks.vectordrawablecolorchange.MainActivity">
<Button
android:layout_marginTop="10dp"
android:id="@+id/button"
android:text="Change Stroke Color"
android:layout_width="wrap_content"
android:layout_marginBottom="30dp"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView "
android:padding="10dp"
android:textColor="@android:color/black"
android:background="@drawable/stroke_background"
/>
</LinearLayout>
MainActivity.java
package quizcounter.compete.geeks.shapestrokecolorchange;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.support.graphics.drawable.VectorDrawableCompat;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
Button button;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView=findViewById(R.id.text);
button=findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//To change the stroke color
GradientDrawable myGrad = (GradientDrawable)textView.getBackground();
myGrad.setStroke(convertDpToPx(3), Color.RED);
}
});
}
private int convertDpToPx(int dp){
return (int) (dp * Resources.getSystem().getDisplayMetrics().density);
}
}
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.support.graphics.drawable.VectorDrawableCompat;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
Button button;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView=findViewById(R.id.text);
button=findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//To change the stroke color
GradientDrawable myGrad = (GradientDrawable)textView.getBackground();
myGrad.setStroke(convertDpToPx(3), Color.RED);
}
});
}
private int convertDpToPx(int dp){
return (int) (dp * Resources.getSystem().getDisplayMetrics().density);
}
}
