ScrollTextView - scrolling TextView for Android

核心提示：找了很就终于在国外一网站上找到一个Scroller的例子，为了日后方便查阅，ScrollTextView - scrolling TextView for Android，在博客上记录以下，Here are the source codes.The key points are:setHorizontallyScrol

找了很就终于在国外一网站上找到一个Scroller的例子，为了日后方便查阅，在博客上记录以下。

Here are the source codes.

The key points are:

setHorizontallyScrolling() and use android.widget.Scroller to make the text scroll;

Use the attached TextPaint of the TextView to measure the length of the text in pixel;

setSingleLine() and setEllipsize(null) to make the text not wrapped and ellipsized;

Override computeScroll() to restart the scrolling when finished

Here are the source codes.

代码

/*************************************************************************/

package com.dirtybear.android;

import android.content.Context;

import android.graphics.Rect;

import android.text.TextPaint;

import android.util.AttributeSet;

import android.view.animation.LinearInterpolator;

import android.widget.Scroller;

import android.widget.TextView;

public class ScrollTextView extends TextView {

// scrolling feature

private Scroller mSlr;

// milliseconds for a round of scrolling

private int mRndDuration = 250;

// the X offset when paused

private int mXPaused = 0;

// whether it's being paused

private boolean mPaused = true;

/*

* constructor

*/

public ScrollTextView(Context context) {

this(context, null);

}

/*

* constructor

*/

public ScrollTextView(Context context, AttributeSet attrs) {

this(context, attrs, android.R.attr.textViewStyle);

}

/*

* constructor

*/

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

super(context, attrs, defStyle);

// customize the TextView