一、前言
老规矩，别的不说，这demo是找了很相关知识集合而成的，可以说对我这种小白来说是绞尽脑汁！程序员讲的是无图无真相！
现在大家一睹为快！
二、比较关键的还是scroller这个类的
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package com.icq.slideview.view;import android.content.context;import android.util.attributeset;import android.util.log;import android.util.typedvalue;import android.view.motionevent;import android.view.view;import android.widget.linearlayout;import android.widget.relativelayout;import android.widget.scroller;import android.widget.textview;import com.icq.slideview.r;public class slideview extends linearlayout {private static final string tag = slideview;private context mcontext;private linearlayout mviewcontent;private relativelayout mholder;private scroller mscroller;private onslidelistener monslidelistener;private int mholderwidth = 120;private int mlastx = 0;private int mlasty = 0;private static final int tan = 2;public interface onslidelistener {public static final int slide_status_off = 0;public static final int slide_status_start_scroll = 1;public static final int slide_status_on = 2;/*** @param view current slideview* @param status slide_status_on or slide_status_off*/public void onslide(view view, int status);}public slideview(context context) {super(context);initview();}public slideview(context context, attributeset attrs) {super(context, attrs);initview();}private void initview() {mcontext = getcontext();mscroller = new scroller(mcontext);setorientation(linearlayout.horizontal);view.inflate(mcontext, r.layout.slide_view_merge, this);mviewcontent = (linearlayout) findviewbyid(r.id.view_content);mholderwidth = math.round(typedvalue.applydimension(typedvalue.complex_unit_dip, mholderwidth, getresources().getdisplaymetrics()));}public void setbuttontext(charsequence text) {((textview)findviewbyid(r.id.delete)).settext(text);}public void setcontentview(view view) {mviewcontent.addview(view);}public void setonslidelistener(onslidelistener onslidelistener) {monslidelistener = onslidelistener;}public void shrink() {if (getscrollx() != 0) {this.smoothscrollto(0, 0);}}public void onrequiretouchevent(motionevent event) {int x = (int) event.getx();int y = (int) event.gety();int scrollx = getscrollx();log.d(tag, x= + x + y= + y);switch (event.getaction()) {case motionevent.action_down: {int deltax = x - mlastx;system.out.println(按下偏移+deltax);if (!mscroller.isfinished()) {mscroller.abortanimation();}if (monslidelistener != null) {monslidelistener.onslide(this,onslidelistener.slide_status_start_scroll);}break;}case motionevent.action_move: {int deltax = x - mlastx;int deltay = y - mlasty;system.out.println(偏移+deltax);if (math.abs(deltax) < math.abs(deltay) * tan) {break;}int newscrollx = scrollx - deltax;if (deltax != 0) {if (newscrollx < 0) {newscrollx = 0;} else if (newscrollx > mholderwidth) {newscrollx = mholderwidth;}this.scrollto(newscrollx, 0);}break;}case motionevent.action_up: {int newscrollx = 0;if (scrollx - mholderwidth * 0.75 > 0) {newscrollx = mholderwidth;}this.smoothscrollto(newscrollx, 0);if (monslidelistener != null) {monslidelistener.onslide(this,newscrollx == 0 ? onslidelistener.slide_status_off: onslidelistener.slide_status_on);}break;}default:break;}mlastx = x;mlasty = y;}private void smoothscrollto(int destx, int desty) {// 缓慢滚动到指定位置int scrollx = getscrollx();int delta = destx - scrollx;system.out.println(偏移scrollx+scrollx);system.out.println(偏移差delta+delta);int a= math.abs(delta) * 3;system.out.println(什么意思+a);mscroller.startscroll(scrollx, 0, delta, 0, math.abs(delta) * 3);invalidate();}@overridepublic void computescroll() {if (mscroller.computescrolloffset()) {system.out.println(当前x位置：+mscroller.getcurrx());system.out.println(当前y位置：+mscroller.getcurry());scrollto(mscroller.getcurrx(), mscroller.getcurry());postinvalidate();}}} |
