在android中展现文字上下滚动

这段时间做了一个小项目：经客户要求，在网上找到了一些相关资源，整理了一下

和大家分享一下：

代码：

package com.hdvon.witlv.util;import android.content.Context;import android.os.Handler;import android.util.AttributeSet;import android.util.Log;import android.view.MotionEvent;import android.widget.ScrollView;public class AutoScrollView extends ScrollView {private final Handler handler = new Handler();private long duration = 50;private boolean isScrolled = false;private int currentIndex = 0;private long period = 1000;private int currentY = -1;private double x;private double y;private int type = -1;/** * @param context */public AutoScrollView(Context context) {this(context, null);}/** * @param context * @param attrs */public AutoScrollView(Context context, AttributeSet attrs) {this(context, attrs, 0);}/** * @param context * @param attrs * @param defStyle */public AutoScrollView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}public boolean onTouchEvent(MotionEvent event) {int Action = event.getAction();switch (Action) {case MotionEvent.ACTION_DOWN:x = event.getX();y = event.getY();if (type == 0) {setScrolled(false);}break;case MotionEvent.ACTION_MOVE:double moveY = event.getY() - y;double moveX = event.getX() - x;Log.d("test", "moveY = " + moveY + "  moveX = " + moveX);if ((moveY > 20 || moveY < -20) && (moveX < 50 || moveX > -50)&& getParent() != null) {getParent().requestDisallowInterceptTouchEvent(true);}break;case MotionEvent.ACTION_UP:if (type == 0) {currentIndex = getScrollY();setScrolled(true);}break;default:break;}return super.onTouchEvent(event);}@Overridepublic boolean onInterceptTouchEvent(MotionEvent p_event) {Log.d("test", "onInterceptTouchEvent");return true;}/** * 判断当前是否为滚动状态 *  * @return the isScrolled */public boolean isScrolled() {return isScrolled;}/** * 开启或者关闭自动滚动功能 *  * @param isScrolled *            true为开启，false为关闭 */public void setScrolled(boolean isScrolled) {this.isScrolled = isScrolled;autoScroll();}/** * 获取当前滚动到结尾时的停顿时间，单位：毫秒 *  * @return the period */public long getPeriod() {return period;}/** * 设置当前滚动到结尾时的停顿时间，单位：毫秒 *  * @param period *            the period to set */public void setPeriod(long period) {this.period = period;}/** * 获取当前的滚动速度，单位：毫秒，值越小，速度越快。 *  * @return the speed */public long getSpeed() {return duration;}/** * 设置当前的滚动速度，单位：毫秒，值越小，速度越快。 *  * @param speed *            the duration to set */public void setSpeed(long speed) {this.duration = speed;}public void setType(int type) {this.type = type;}private void autoScroll() {handler.postDelayed(new Runnable() {@Overridepublic void run() {boolean flag = isScrolled;if (flag) {// Log.d("test", "currentY = " + currentY +// "  getScrollY() = "+ getScrollY() );if (currentY == getScrollY()) {try {Thread.sleep(period);} catch (InterruptedException e) {e.printStackTrace();}currentIndex = 0;scrollTo(0, 0);handler.postDelayed(this, period);} else {currentY = getScrollY();handler.postDelayed(this, duration);currentIndex++;scrollTo(0, currentIndex * 1);}} else {// currentIndex = 0;// scrollTo(0, 0);}}}, duration);}}

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