Android TextView 跑马灯效果（自定义控件）

方式一：XML控制

xml代码如下：

<TextView
        android:layout_width="100dip"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="走马灯效果的演示"
        android:singleLine="true"
        android:ellipsize="marquee"
        android:focusable="true"
        android:focusableInTouchMode="true"
        />
           

后四行为主要代码

方式二：自定义控件

## 可在一个页面中显示多个跑马灯

package com.xin.paomadeng;

import android.content.Context;
import android.graphics.Rect;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.widget.TextView;

/**
 * Created by X on 2016/12/26.
 */
public class MarqueeTextView extends TextView
{
    public MarqueeTextView(Context context)
    {
        this(context, null);
    }

    public MarqueeTextView(Context context, AttributeSet attrs)
    {
        super(context, attrs);

        setFocusable(true);
        setFocusableInTouchMode(true);

        setSingleLine();
        setEllipsize(TextUtils.TruncateAt.MARQUEE);
        setMarqueeRepeatLimit(-);
    }

    public MarqueeTextView(Context context, AttributeSet attrs, int defStyle)
    {
        super(context, attrs, defStyle);

        setFocusable(true);
        setFocusableInTouchMode(true);

        setSingleLine();
        setEllipsize(TextUtils.TruncateAt.MARQUEE);
        setMarqueeRepeatLimit(-);
    }


    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect)
    {
        if (focused)
        {
            super.onFocusChanged(focused, direction, previouslyFocusedRect);
        }
    }

    @Override
    public void onWindowFocusChanged(boolean focused)
    {
        if (focused)
        {
            super.onWindowFocusChanged(focused);
        }
    }

    @Override
    public boolean isFocused()
    {
        return true;
    }
}