@Override
    public boolean isFocused() {
        // TODO Auto-generated method stub
        return true;
    }

ctrl+c保存一下

package com.example.marqueetextviewdemo;

import android.content.Context;

import android.util.AttributeSet;

import android.widget.TextView;

public class MarqueeText extends TextView{

public MarqueeText(Context context) {

super(context);

}

public MarqueeText(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

public MarqueeText(Context context, AttributeSet attrs) {

super(context, attrs);

}

public boolean isFocused(){

return true;

}

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/container"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <com.example.marqueetextviewdemo.MarqueeText

        android:id="@+id/textView1"

      android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:singleLine="true"

        android:ellipsize="marquee"

        android:focusable="true"

        android:focusableInTouchMode="true"

        android:text="@string/hello_world" />

     <com.example.marqueetextviewdemo.MarqueeText

        android:layout_below="@id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:singleLine="true"

        android:ellipsize="marquee"

        android:focusable="true"

        android:layout_marginTop="10dp"

        android:focusableInTouchMode="true"

        android:text="@string/hello_world" />

</RelativeLayout>

你是不是用Android studio写的？那个isFocuse 里面的代码要改成return true