MarqueeText,java:

package com.example.test_3;

import android.content.Context;

import android.util.AttributeSet;

import android.widget.TextView;

public class MarqueeText extends TextView {

public MarqueeText(Context context) {

super(context);

// TODO Auto-generated constructor stub

}

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

super(context, attrs, defStyle);

// TODO Auto-generated constructor stub

}

public MarqueeText(Context context, AttributeSet attrs) {

super(context, attrs);

// TODO Auto-generated constructor stub

}

@Override

public boolean isFocused() {//实现滚动焦点强制

return true;

}

}

MainActivity.java:

package com.example.test_3;

import android.app.Activity;

import android.os.Bundle;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main_activity);//使main_activity内容文本在APP上面运行（必须）

    }

}

strings.xml：

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">test_3</string>

    <string name="hello_world">明月装饰了我的梦，我装饰了别人的窗子！我是来自一个未知世界的奇妙小女子。。。</string>

    <string name="action_settings">Settings</string>

</resources>

main_activity.xml:

<?xml version="1.0" encoding="utf-8"?>

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <com.example.test_3.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.test_3.MarqueeText

        android:layout_below="@id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="10dp"

        android:singleLine="true"

        android:ellipsize="marquee"

        android:focusable="true"

        android:focusableInTouchMode="true"

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

</LinearLayout>