基于listview中的adapter侧滑，监听adapter中的view的触摸实现滑动，先看效果图
image.png
使用步骤
1.提供自定义View
package com.sunnet.shipcargo.view;
import android.content.Context;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.ViewDragHelper;
import android.support.v4.widget.ViewDragHelper.Callback;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
/**
* 侧滑Layout
*/
public class SwipeListLayout extends FrameLayout {
private View hiddenView;
private View itemView;
private int hiddenViewWidth;
private ViewDragHelper mDragHelper;
private int hiddenViewHeight;
private int itemWidth;
private int itemHeight;
private OnSwipeStatusListener listener;
private Status status = Status.Close;
private boolean smooth = true;
public static final String TAG = "SlipListLayout";
// 状态
public enum Status {
Open, Close
}
/**
* 设置侧滑状态
*
* @param status
* 状态 Open or Close
* @param smooth
* 若为true则有过渡动画，否则没有
*/
public void setStatus(Status status, boolean smooth) {
this.status = status;
if (status == Status.Open) {
open(smooth);
} else {
close(smooth);
}
}
public void setOnSwipeStatusListener(OnSwipeStatusListener listener) {
this.listener = listener;
}
/**
* 是否设置过渡动画
*
* @param smooth
*/
public void setSmooth(boolean smooth) {
this.smooth = smooth;
}
public interface OnSwipeStatusListener {
/**
* 当状态改变时回调
*
* @param status
*/
void onStatusChanged(Status status);
/**
* 开始执行Open动画
*/
void onStartCloseAnimation();
/**
* 开始执行Close动画
*/
void onStartOpenAnimation();
}
public SwipeListLayout(Context context) {
this(context, null);
}
public SwipeListLayout(Context context, AttributeSet attrs) {
super(context, attrs);
mDragHelper = ViewDragHelper.create(this, callback);
}
// ViewDragHelper的回调
Callback callback = new Callback() {
@Override
public boolean tryCaptureView(View view, int arg1) {
return view == itemView;
}
@Override
public int clampViewPositionHorizontal(View child, int left, int dx) {
if (child == itemView) {
if (left > 0) {
return 0;
} else {
left = Math.max(left, -hiddenViewWidth);
return left;
}
}
return 0;
}
@Override
public int getViewHorizontalDragRange(View child) {
return hiddenViewWidth;
}
@Override
public void onViewPositionChanged(View changedView, int left, int top,
int dx, int dy) {
if (itemView == changedView) {
hiddenView.offsetLeftAndRight(dx);
}
// 有时候滑动很快的话 会出现隐藏按钮的linearlayout没有绘制的问题
// 为了确保绘制成功 调用 invalidate
invalidate();
}
@Override
public void onViewReleased(View releasedChild, float xvel, float yvel) {
// 向右滑xvel为正 向左滑xvel为负
if (releasedChild == itemView) {
if (xvel == 0
&& Math.abs(itemView.getLeft()) > hiddenViewWidth / 2.0f) {
open(smooth);
} else if (xvel < 0) {
open(smooth);
} else {
close(smooth);
}
}
}
};
private Status preStatus = Status.Close;
/**
* 侧滑关闭
*
* @param smooth
* 为true则有平滑的过渡动画
*/
private void close(boolean smooth) {
preStatus = status;
status = Status.Close;
if (smooth) {
if (mDragHelper.smoothSlideViewTo(itemView, 0, 0)) {
if (listener != null) {
Log.i(TAG, "start close animation");
listener.onStartCloseAnimation();
}
ViewCompat.postInvalidateOnAnimation(this);
}
} else {
layout(status);
}
if (listener != null && preStatus == Status.Open) {
Log.i(TAG, "close");
listener.onStatusChanged(status);
}
}
/**
*
* @param status
*/
private void layout(Status status) {
if (status == Status.Close) {
hiddenView.layout(itemWidth, 0, itemWidth + hiddenViewWidth,
itemHeight);
itemView.layout(0, 0, itemWidth, itemHeight);
} else {
hiddenView.layout(itemWidth - hiddenViewWidth, 0, itemWidth,
itemHeight);
itemView.layout(-hiddenViewWidth, 0, itemWidth - hiddenViewWidth,
itemHeight);
}
}
/**
* 侧滑打开
*
* @param smooth
* 为true则有平滑的过渡动画
*/
private void open(boolean smooth) {
preStatus = status;
status = Status.Open;
if (smooth) {
if (mDragHelper.smoothSlideViewTo(itemView, -hiddenViewWidth, 0)) {
if (listener != null) {
Log.i(TAG, "start open animation");
listener.onStartOpenAnimation();
}
ViewCompat.postInvalidateOnAnimation(this);
}
} else {
layout(status);
}
if (listener != null && preStatus == Status.Close) {
Log.i(TAG, "open");
listener.onStatusChanged(status);
}
}
@Override
public void computeScroll() {
super.computeScroll();
// 开始执行动画
if (mDragHelper.continueSettling(true)) {
ViewCompat.postInvalidateOnAnimation(this);
}
}
// 让ViewDragHelper来处理触摸事件
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
final int action = ev.getAction();
if (action == MotionEvent.ACTION_CANCEL) {
mDragHelper.cancel();
return false;
}
return mDragHelper.shouldInterceptTouchEvent(ev);
}
// 让ViewDragHelper来处理触摸事件
@Override
public boolean onTouchEvent(MotionEvent event) {
mDragHelper.processTouchEvent(event);
return true;
};
@Override
protected void onFinishInflate() {
super.onFinishInflate();
hiddenView = getChildAt(0); // 得到隐藏按钮的linearlayout
itemView = getChildAt(1); // 得到最上层的linearlayout
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
// 测量子View的长和宽
itemWidth = itemView.getMeasuredWidth();
itemHeight = itemView.getMeasuredHeight();
hiddenViewWidth = hiddenView.getMeasuredWidth();
hiddenViewHeight = hiddenView.getMeasuredHeight();
}
@Override
protected void onLayout(boolean changed, int left, int top, int right,
int bottom) {
layout(Status.Close);
}
}
2.adapter中的布局
//此处放侧滑显示的内容
//此处放显示内容
3.使用
1.定义侧滑
private Set sets = new HashSet();//全局变量
2.绑定侧滑布局
SwipeListLayout sll_main=(SwipeListLayout) contentView.findViewById(R.id.sll_main);//Adapter中的getView绑定
3.事件注册
sll_main.setOnSwipeStatusListener(new MyOnSlipStatusListener(viewHolder.sll_main));
4.事件处理
/**
* 侧滑
* @author 75242
*
*/
class MyOnSlipStatusListener implements
SwipeListLayout.OnSwipeStatusListener {
private SwipeListLayout slipListLayout;
public MyOnSlipStatusListener(SwipeListLayout slipListLayout) {
this.slipListLayout = slipListLayout;
}
@Override
public void onStatusChanged(SwipeListLayout.Status status) {
if (status == SwipeListLayout.Status.Open) {
// 若有其他的item的状态为Open，则Close，然后移除
if (sets.size() > 0) {
for (SwipeListLayout s : sets) {
s.setStatus(SwipeListLayout.Status.Close, true);
sets.remove(s);
}
}
sets.add(slipListLayout);
} else {
if (sets.contains(slipListLayout))
sets.remove(slipListLayout);
}
}
@Override
public void onStartCloseAnimation() {
}
@Override
public void onStartOpenAnimation() {
}
}