android 下拉刷新上拉加载更多，高仿ios左滑动删除item，解决了众多手势问题

 

android 下拉刷新上拉加载更多，高仿ios左滑动删除item，解决了众多手势问题

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

 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();
     }

     @Override
     public 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();
         }
     }

 }

三、直接源码下载了：最近总结一下，csdn在我看来最近没有那么活跃了，真正的大牛已经很少在csdn发微博了，都去了github、stackoverflow、eoe等网站了！哎，逼于无奈我后期也得转移阵地了！