protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    float x_draw = getPaddingLeft();
    float y_draw = getPaddingTop() + dfPaint.getTextSize();
    for (ExtendText t : extendTexts) {
      Paint paint = t.isHighlight ? hlPaint : dfPaint;
      float textLen = paint.measureText(t.textUnit);
      if (x_draw + textLen > width) {
        x_draw = getPaddingLeft();
        y_draw += paint.getTextSize();
      }
      canvas.drawText(t.textUnit, x_draw, y_draw, paint);
      x_draw += textLen;
    }
  }

public class MainActivity extends Activity {
  private final static String TEXT = "";
  private final static String[] HIGHLIGHT = {};

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    HighLightTextView hlTv = (HighLightTextView) findViewById(R.id.hlTv);
    hlTv.setDisplayedText(TEXT, Arrays.asList(HIGHLIGHT));
    hlTv.setDefaultColor(Color.BLACK);
    hlTv.setHighlightColor(ContextCompat.getColor(this, R.color.colorPrimary));

  }
}

<com.jy.highlighttextview.HighLightTextView
  android:id="@+id/hlTv"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:padding="5dp"
  app:textSize="16sp" />

app:defaultColor="@color/colorPrimary"
app:highlightColor="@color/colorAccent"
app:text="@string/app_name"
app:textSize="16sp"