自己处理的TextView跑马

package com.example.textedittext.utils;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.util.AttributeSet;import android.widget.TextView;public class MarqueeText extends TextView implements Runnable {private int currentScrollX = 0;// 初始滚动的位置private int firstScrollX = 0;private boolean isStop = false;private int textWidth;private int mWidth = 0; // 控件宽度//text每次滚动长度private int speed = 2;//text两次滚动时间间隔 msprivate int delayed = 8;private int endX; // 滚动到哪个位置private boolean isFirstDraw = true; // 当首次或文本改变时重置//text一次滚动完成后，多长时间启动第二次滚动private int delayAgain =1000 ;private List<String> list =new ArrayList<String>();public MarqueeText(Context context) {super(context);}public MarqueeText(Context context, AttributeSet attrs) {super(context, attrs);}public MarqueeText(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);if (isFirstDraw) {getTextWidth();firstScrollX = getScrollX(); // 起始位置不一定为0,改变内容后会变，需重新赋值currentScrollX = firstScrollX;mWidth = this.getWidth();//endX = firstScrollX + textWidth - mWidth / 2;//字体滚动到一半的时候就从头滚动endX = firstScrollX + textWidth;//字体滚完整个屏幕后再从头滚动isFirstDraw = false;}}// 每次滚动几点public void setSpeed(int sp) {speed = sp;}// 滚动间隔时间,毫秒public void setDelayed(int delay) {delayed = delay;}/** * 设置滚动的list 内容 * @param list */public void setList(List<String> list){/*if(list!=null&&list.size()!=0){this.list = list;setText(list.get(0));}*/}/** * 获取文字宽度 */private void getTextWidth() {Paint paint = this.getPaint();String str = this.getText().toString();textWidth = (int) paint.measureText(str);}@Overridepublic void run() {long start=System.currentTimeMillis();currentScrollX += 1;// 滚动速度,每次滚动几点scrollTo(currentScrollX, 0);// 从头开始if (currentScrollX > endX) {// scrollTo(0, 0);// currentScrollX = 0; //原文重置为0,发现控件所放的位置不同，初始位置不一定为0scrollTo(-mWidth, 0);currentScrollX = -mWidth;postDelayed(this, delayed);if(list.size()!=0){int current = list.indexOf(getText().toString());if(current+1<list.size()){setText(list.get(current+1));}else{setText(list.get(0));}}} else {postDelayed(this, delayed);}long end=System.currentTimeMillis();if (isStop){try {isStop=false;Thread.sleep(4000);}catch (Exception e){}}else {if (end - start < 10) {try {Thread.sleep(10 - (end - start));} catch (Exception e) {e.printStackTrace();}}}if (currentScrollX == 0) {isStop = true;}}@Overrideprotected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {}// 开始滚动public void startScroll() {isStop = false;this.removeCallbacks(this);postDelayed(this, 1000);}// 停止滚动public void stopScroll() {isStop = true;}// 从头开始滚动public void startFor0() {currentScrollX = 0;startScroll();}}