Android Studio [TextView]

MainAcitvity

package com.xdw.secondapp;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    Button mBtnTextView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mBtnTextView=findViewById(R.id.Text_view1);
        mBtnTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //跳转到TextView演示界面
                Intent intent =new Intent(MainActivity.this,TextViewActivity.class);
                startActivity(intent);
            }
        });
    }
}

TextViewAcitvity

package com.xdw.secondapp;

import android.graphics.Paint;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class TextViewActivity extends AppCompatActivity {
    private TextView mTv4;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view);
        mTv4=findViewById(R.id.tv_4);
        mTv4.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);//中划线
        mTv4.getPaint().setAntiAlias(true);//去除锯齿
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/Text_view1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView"/>

</LinearLayout>

activity_text_view.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".TextViewActivity"
    android:orientation="vertical">

    <TextView
        android:id="@+id/tv_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="瑞哥在奔跑"
        android:textColor="#000000"
        android:textSize="24sp" />

    <TextView
        android:id="@+id/tv_2"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:ellipsize="end"
        android:maxLines="1"
        android:text="瑞哥在奔跑"
        android:textColor="#000000"
        android:textSize="24sp" />

    <TextView
        android:id="@+id/tv_3"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:drawableRight="@drawable/timm"
        android:drawablePadding="5dp"
        android:text="筛选"
        android:textColor="#000000"
        android:textSize="24sp"
        />
    <TextView
        android:id="@+id/tv_4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="瑞哥在奔跑"
        android:textColor="#000000"
        android:textSize="24sp"
        android:layout_marginTop="10dp"/>
</LinearLayout>

我学到的：
定义mTv4
mTv4.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);//中划线
mTv4.getPaint().setAntiAlias(true);//去除锯齿

android:text="TextView"//输出文字
定义mBtnTextView

mBtnTextView=findViewById(R.id.Text_view1);
        mBtnTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //跳转到TextView演示界面
                Intent intent =new Intent(MainActivity.this,TextViewActivity.class);
                startActivity(intent);
            }
        });
//跳转

结果：