android - Highlight text in a TextView

activity_main.xml

 <?xml version="1.0" encoding="utf-8"?> <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="#eae8e4"     >     <TextView         android:id="@+id/tv"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:textSize="40dp"         android:layout_margin="5dp"         android:padding="5dp"         android:fontFamily="sans-serif-condensed"         android:textColor="@android:color/black"         android:text="Click the button to highlight the TextView specific text/word."         />     <Button         android:id="@+id/btn"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Highlight Text 'The'"         android:layout_below="@id/tv"         /> </RelativeLayout> 

MainActivity.java

 package com.cfsuman.me.androidcodesnippets;  import android.app.Activity; import android.content.Context; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.Html; import android.view.View; import android.widget.Button; import android.widget.RelativeLayout; import android.widget.TextView;   public class MainActivity extends AppCompatActivity {      private Context mContext;     private Activity mActivity;      private RelativeLayout mRelativeLayout;     private TextView mTextView;     private Button mButton;       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          // Get the application context         mContext = getApplicationContext();          // Get the activity         mActivity = MainActivity.this;          // Get the widgets reference from XML layout         mRelativeLayout = (RelativeLayout) findViewById(R.id.rl);         mTextView = (TextView) findViewById(R.id.tv);         mButton = (Button) findViewById(R.id.btn);          // Set a click listener for button         mButton.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View view) {                 // Do the task                 doTask();             }         });     }      // Custom method to do a task     protected void doTask(){         // Specify the text/word to highlight inside TextView         String textToHighlight = "the";          // Construct the formatted text         String replacedWith = "<font color='red'>" + textToHighlight + "</font>";          // Get the text from TextView         String originalString = mTextView.getText().toString();          // Replace the specified text/word with formatted text/word         String modifiedString = originalString.replaceAll(textToHighlight,replacedWith);          // Update the TextView text         mTextView.setText(Html.fromHtml(modifiedString));     } }