Android Studio

@TextView

    My Application
    天哥在奔跑

package com.example.myapplication;
import Androidx.appcompat.app.AppCompatActivity;
import android.graphics.Paint;
import android.os.Bundle;
import android.text.Html;
import android.widget.TextView;
import org.w3c.dom.Text;
public class TextViewActivity extends AppCompatActivity {
    private TextView mTv4;
    private TextView mTv5;
    private TextView mTv6;
    private TextView mTv7;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view);
        mTv4 = (TextView) findViewById(R.id.tv_4);
        mTv4.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);//中划线
        mTv4.getPaint().setAntiAlias(true);//去除锯齿
        mTv5 = (TextView) findViewById(R.id.tv_5);
        mTv5.getPaint().setFlags(Paint.UNDERLINE_TEXT_FLAG);//下划线
        mTv6 = (TextView) findViewById(R.id.tv_6);
        mTv6.setText(Html.fromHtml("天哥在奔跑"));
        mTv7 = (TextView) findViewById(R.id.tv_7);
        mTv7.setSelected(true);
    }
}

package com.example.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
    private Button mBtnTextView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mBtnTextView=findViewById(R.id.btn_textview);
        mBtnTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                  Intent intent=new Intent(MainActivity.this,TextViewActivity.class);
                  startActivity(intent);
            }
        });
    }
}