How to add a border to TextView programmatically in Android

activity_main.xml
 <RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:id="@+id/rl"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:padding="16dp"     tools:context=".MainActivity"     android:background="@android:color/white"     >     <TextView         android:id="@+id/tv"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Sample TextView..."         android:textColor="#ff8a39ff"         android:padding="25dp"         android:textSize="30dp"         />     <Button         android:id="@+id/btn"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Set TextView Border"         android:layout_below="@id/tv"         /> </RelativeLayout> 
MainActivity.java
 package com.cfsuman.me.androidcodesnippets;  import android.graphics.Color; import android.os.Bundle; import android.app.Activity; import android.view.View; import android.widget.Button; import android.widget.RelativeLayout; import android.widget.TextView; import android.graphics.drawable.ShapeDrawable; import android.graphics.drawable.shapes.RectShape; import android.graphics.Paint.Style;  public class MainActivity extends Activity{      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          // Get the widgets reference from XML layout         RelativeLayout rl = (RelativeLayout) findViewById(R.id.rl);         simpulan TextView tv = (TextView) findViewById(R.id.tv);         Button btn = (Button) findViewById(R.id.btn);          // Set a click listener for Button widget         btn.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View v) {                 // Initializing a ShapeDrawable                 ShapeDrawable sd = new ShapeDrawable();                  // Specify the shape of ShapeDrawable                 sd.setShape(new RectShape());                  // Specify the border color of shape                 sd.getPaint().setColor(Color.RED);                  // Set the border width                 sd.getPaint().setStrokeWidth(10f);                  // Specify the style is a Stroke                 sd.getPaint().setStyle(Style.STROKE);                  // Finally, add the drawable background to TextView                 tv.setBackground(sd);             }         });     } } 
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