Android TextView 高亮字体并添加点击事件

package com.zutil.lib;

import android.graphics.Typeface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextPaint;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.StyleSpan;
import android.text.style.UnderlineSpan;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

private TextView tv1 ;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

tv1 = (TextView) findViewById( R.id.tv1 );

String url1 =  "这是测试";
String url2 = "点击一下试试看";
String url = url1 + url2;
SpannableStringBuilder style = new SpannableStringBuilder(url1 + url2);
TextViewURLSpan myURLSpan = new TextViewURLSpan();
style.setSpan(myURLSpan, url1.length(), url.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
style.setSpan(new StyleSpan(Typeface.NORMAL ), url1.length(), url.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
style.setSpan(new UnderlineSpan(), url1.length(), url.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
style.setSpan(new ForegroundColorSpan(getResources().getColor(R.color.colorPrimaryDark)), url1.length(), url.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
//  style.setSpan(new BackgroundColorSpan(getResources().getColor(R.color.colorAccent)), url1.length(),url.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
tv1.setText(style);

//设置超链接为可点击状态
tv1.setMovementMethod(LinkMovementMethod.getInstance());

}

class TextViewURLSpan extends ClickableSpan {
@Override
public void updateDrawState(TextPaint ds) {
ds.setColor(getResources().getColor(R.color.colorAccent));
ds.setUnderlineText(false); //去掉下划线
}

@Override
public void onClick(View widget) {//点击事件
Toast.makeText( MainActivity.this, "点击了", Toast.LENGTH_SHORT).show();
}
}

}