Android Studio [跑马灯]

MainActivity

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 mtv5;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view);
        mtv5=findViewById(R.id.tv_5);
        mtv5.setSelected(true);
    }
}

activity_text_view.xm

<?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"
    android:orientation="vertical">

    <TextView
        android:id="@+id/tv_5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="瑞哥在奔跑瑞哥在奔跑瑞哥在奔跑瑞哥在奔跑"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:singleLine="true"
        android:focusable="true"
        android:scrollHorizontally="true"
        android:focusableInTouchMode="true"
        android:textColor="#000000"
        android:textSize="24sp" />

</LinearLayout>

　　//设置为跑马灯显示

android:ellipsize="marquee"

//获取焦点
          android:focusable="true"

//可以通过toucth来获得focus
          android:focusableInTouchMode="true"

//设置重复的次数
          android:marqueeRepeatLimit="marquee_forever"

//单行显示文字
        android:singleLine="true"