android开发，自定义左侧滑出菜单

曾经终败给现在 2022-06-13 09:44 382阅读 0赞

`这里给大家提供一个类似QQ聊天那种可以左侧滑出菜单的自定义控件。希望对大家有帮助。参考了一些网友的做法，自己整理优化了一下，用法非常简单，就一个类，不需要自己写任何的代码，只要添加上布局就能实现侧滑菜单效果，非常方便。不多说，一看就懂。 先来看看效果： 先看看实现：`

package com.kokjuis.travel.customView;
    
    import android.content.Context;
    import android.content.res.TypedArray;
    import android.graphics.Point;
    import android.support.v4.widget.ViewDragHelper;
    import android.util.AttributeSet;
    import android.util.Log;
    import android.view.Gravity;
    import android.view.MotionEvent;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.FrameLayout;
    
    import com.kokjuis.travel.R;
    
    /**
     * <com.kokjuis.travel.customView.SwipeDragLayout
     android:id="@+id/swip_layout"
     android:layout_width="match_parent"
     android:layout_height="70dp"
     android:clickable="true"
     app:ios="true"
     app:click_to_close="true"
     >
    
     <LinearLayout
     android:id="@+id/id_back"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:gravity="right">
    
     <Button
     android:id="@+id/btn_delete"
     android:layout_width="70dp"
     android:layout_height="70dp"
     android:background="#00ffff"
     android:text="删除" />
    
     <Button
     android:id="@+id/btn_move"
     android:layout_marginLeft="1dp"
     android:layout_width="70dp"
     android:layout_height="70dp"
     android:background="#00ffff"
     android:text="移动" />
    
     </LinearLayout>
    
     <RelativeLayout
     android:id="@+id/id_front"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:background="@color/white">
     .........你的布局
    
     </RelativeLayout>
    
     </com.kokjuis.travel.customView.SwipeDragLayout>
     *
     *
     *
     * 用法就是直接用这个控件把需要的布局包起来
     *  可滑动的layout extends FrameLayout
     */
    public class SwipeDragLayout extends FrameLayout {
    
        private static SwipeDragLayout mCacheView;
        private View contentView;//列表的view
        private View menuView;//滑出菜单的view
        private ViewDragHelper mDragHelper;
        private Point originPos = new Point();
        private boolean isOpen, ios, clickToClose;
        private float offset;
        private float needOffset = 0.2f;
        private SwipeListener mListener;
    
        public SwipeDragLayout(Context context) {
            this(context, null);
        }
    
        public SwipeDragLayout(Context context, AttributeSet attrs) {
            this(context, attrs, 0);
        }
    
        public SwipeDragLayout(Context context, AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
    
            TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.SwipeDragLayout);
            needOffset = array.getFloat(R.styleable.SwipeDragLayout_need_offset, 0.2f);
            //是否有回弹效果
            ios = array.getBoolean(R.styleable.SwipeDragLayout_ios, false);
            clickToClose = array.getBoolean(R.styleable.SwipeDragLayout_click_to_close, false);
            init();
            array.recycle();
        }
    
        public static SwipeDragLayout getmCacheView() {
            return mCacheView;
        }
    
        //初始化dragHelper，对拖动的view进行操作
        private void init() {
            mDragHelper = ViewDragHelper.create(this, 1.0f, new ViewDragHelper.Callback() {
    
    
                @Override
                public boolean tryCaptureView(View child, int pointerId) {
                    return child == contentView;
                }
    
    
                @Override
                public void onViewReleased(View releasedChild, float xvel, float yvel) {
                    if (releasedChild == contentView) {
                        if (isOpen()) {
                            if (offset != 1 && offset > (1 - needOffset)) {
                                open();
                            } else if (offset == 1) {
                                if (clickToClose) {
                                    close();
                                }
                            } else {
                                close();
                            }
                        } else {
                            if (offset != 0 && offset < needOffset) {
                                close();
                            } else if (offset == 0) {
                                getParent().requestDisallowInterceptTouchEvent(false);
                            } else {
                                open();
                                Log.d("Released and isOpen", "" + isOpen);
                                if (mListener != null) {
                                    mListener.onOpened(SwipeDragLayout.this);
                                }
                            }
                        }
                        invalidate();
                    }
                }
    
    
                @Override
                public int clampViewPositionHorizontal(View child, int left, int dx) {
                    //滑动距离,如果启动效果，则可滑动3/2倍菜单宽度的距离
                    final int leftBound = getPaddingLeft() - (ios ? menuView.getWidth() * 3 / 2 : menuView.getWidth());
                    final int rightBound = getWidth() - child.getWidth();
                    final int newLeft = Math.min(Math.max(left, leftBound), rightBound);
                    return newLeft;
                }
    
                @Override
                public int getViewHorizontalDragRange(View child) {
                    return contentView == child ? menuView.getWidth() : 0;
                }
    
                @Override
                public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {
                    final int childWidth = menuView.getWidth();
                    offset = -(float) (left - getPaddingLeft()) / childWidth;
                    //offset can callback here
                    if (mListener!=null){
                        mListener.onUpdate(SwipeDragLayout.this,offset);
                    }
                }
    
    
            });
    
        }
    
        public void setClickToClose(boolean clickToClose) {
            this.clickToClose = clickToClose;
        }
    
        public void setIos(boolean ios) {
            this.ios = ios;
        }
    
        public boolean isOpen() {
            return isOpen;
        }
    
        public void open() {
            mCacheView = SwipeDragLayout.this;
            mDragHelper.settleCapturedViewAt(originPos.x - menuView.getWidth(), originPos.y);
            isOpen = true;
        }
    
        public void smoothOpen(boolean smooth) {
            mCacheView = SwipeDragLayout.this;
            if (smooth) {
                mDragHelper.smoothSlideViewTo(contentView, originPos.x - menuView.getWidth(), originPos.y);
            } else {
                contentView.layout(originPos.x - menuView.getWidth(), originPos.y, menuView.getLeft(), menuView.getBottom());
            }
        }
    
        //滑动关闭方法
        private void smoothClose(boolean smooth) {
            if (smooth) {
                mDragHelper.smoothSlideViewTo(contentView, getPaddingLeft(), getPaddingTop());
                postInvalidate();
            } else {
                contentView.layout(originPos.x, originPos.y, menuView.getRight(), menuView.getBottom());
            }
            isOpen = false;
            mCacheView = null;
    
        }
    
    
    
        public void close() {
            mDragHelper.settleCapturedViewAt(originPos.x, originPos.y);
            isOpen = false;
            mCacheView = null;
            if (mListener != null) {
                mListener.onClosed(SwipeDragLayout.this);
            }
        }
        
        @Override
        public boolean onInterceptTouchEvent(MotionEvent ev) {
            switch (ev.getAction()) {
    
                case MotionEvent.ACTION_DOWN:
                    if (mCacheView != null) {
                        if (mCacheView != this) {
                            mCacheView.smoothClose(true);
                            return true;//点击关闭后不执行其他click事件
                        }else if(isOpen()&&ev.getX()<menuView.getLeft()){
                            mDragHelper.smoothSlideViewTo(contentView, getPaddingLeft(), getPaddingTop());
                            postInvalidate();
                            return true;//点击关闭后不执行其他click事件
                        }
                       getParent().requestDisallowInterceptTouchEvent(true);
                    }
                    break;
    
            }
            return mDragHelper.shouldInterceptTouchEvent(ev);
    
    
        }
    
        @Override
        public boolean onTouchEvent(MotionEvent event) {
            mDragHelper.processTouchEvent(event);
            return true;
        }
    
    
        @Override
        protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
            super.onLayout(changed, left, top, right, bottom);
    
            originPos.x = contentView.getLeft();
            originPos.y = contentView.getTop();
        }
    
        @Override
        public void computeScroll() {
            if (mDragHelper.continueSettling(true)) {
                invalidate();
            }
        }
    
        @Override
        protected void onFinishInflate() {
            super.onFinishInflate();
            contentView = getChildAt(1);
            menuView = getChildAt(0);
            FrameLayout.LayoutParams params = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            params.gravity = Gravity.RIGHT;
            menuView.setLayoutParams(params);
            //重写OnClickListener会导致关闭失效
            if (contentView!=null){
                contentView.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (clickToClose&&isOpen()){
                            smoothClose(true);
                            return;
                        }
                        if (mListener!=null){
                            mListener.onClick(SwipeDragLayout.this);
                        }
    
                    }
                });
            }
        }
    
        @Override
        protected void onDetachedFromWindow() {
            if (mCacheView == this) {
                mCacheView.smoothClose(false);
                mCacheView = null;
            }
            super.onDetachedFromWindow();
    
        }
    
    
        @Override
        public void setOnTouchListener(OnTouchListener l) {
            super.setOnTouchListener(l);
        }
    
        public void addListener(SwipeListener listener) {
            mListener = listener;
        }
    
        //滑动监听
        public interface SwipeListener {
    
            /**
             * 拖动中，可根据offset 进行其他动画
             * @param layout
             * @param offset 偏移量
             */
            void onUpdate(SwipeDragLayout layout, float offset);
    
            /**
             * 展开完成
             * @param layout
             */
            void onOpened(SwipeDragLayout layout);
    
            /**
             * 关闭完成
             * @param layout
             */
            void onClosed(SwipeDragLayout layout);
    
            /**
             * 点击内容layout {@link #onFinishInflate()}
             * @param layout
             */
            void onClick(SwipeDragLayout layout);
        }
    
    }

必要的一些配置，添加到attrs.xml里：

<declare-styleable name="SwipeDragLayout">
            <attr name="need_offset" format="float" />
            <attr name="ios" format="boolean" />
            <attr name="click_to_close" format="boolean" />
        </declare-styleable>

看看用法，非常简单，直接放在你想要的item布局里面就可以了：

<com.kokjuis.travel.customView.SwipeDragLayout
            android:id="@+id/swip_layout"
            android:layout_width="match_parent"
            android:layout_height="70dp"
            android:clickable="true"
            app:ios="true"
            app:click_to_close="true"
            >
    
        <LinearLayout
            android:id="@+id/id_back"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="right">
    
            <Button
                android:id="@+id/btn_delete"
                android:layout_width="70dp"
                android:layout_height="70dp"
                android:background="#00ffff"
                android:text="删除" />
    
            <Button
                android:id="@+id/btn_move"
                android:layout_marginLeft="1dp"
                android:layout_width="70dp"
                android:layout_height="70dp"
                android:background="#00ffff"
                android:text="移动" />
    
        </LinearLayout>
    
    
        <RelativeLayout
            android:id="@+id/id_front"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/white">
    
            //你自己的布局.....
    
           
        </RelativeLayout>
    
        </com.kokjuis.travel.customView.SwipeDragLayout>