Android动手实现一个侧滑删除控件,支持Recyclerview

效果图

ScreenGif5.gif
  • 滑动Recyclerview的时候自动关闭所有menu
  • 拖动下一个menu的时候,自动关闭上一个menu
  • 点击编辑和删除后,自动关闭menu

实现步骤

自定义一个ViewGroup

public class SwipeMenu extends ViewGroup

    private int downX, moveX, moved;
    private Scroller scroller = new Scroller(getContext());
    private onScrollStateChanged onScrollStateChanged;
    private boolean haveShowRight =false;

重写onMeasure

主要是重新设置高度

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        measureChildren(widthMeasureSpec, heightMeasureSpec);
        int width = MeasureSpec.getSize(widthMeasureSpec);
        View child = getChildAt(0);
        int margin =
                ((MarginLayoutParams) child.getLayoutParams()).topMargin +
                        ((MarginLayoutParams) child.getLayoutParams()).bottomMargin;
        setMeasuredDimension(width, getChildAt(0).getMeasuredHeight() + margin);
    }

重写onLayout

让第一个view占据全屏,第二个view为菜单view

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int cCount = getChildCount();
        for (int i = 0; i < cCount; i++) {
            View child = getChildAt(i);
            if (i == 0) {
                child.layout(l, t, r, b);
            } else if (i == 1) {
                child.layout(r, t, r + child.getMeasuredWidth(), b);
            }
        }
    }

重写onInterruptTouchEvent

判断move超过2为要拖动menu意图,进行拦截

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = (int) ev.getRawX();
                break;
            case MotionEvent.ACTION_MOVE:
                moveX = (int) ev.getRawX();
                if (moveX - downX > 2) {
                    return true;
                }
                break;
            case MotionEvent.ACTION_UP:
                break;
        }
        return super.onInterceptTouchEvent(ev);
    }

重写onTouchEvent

处理弹性滑动,判断什么时候要显示菜单,什么时候要关闭菜单

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if(!scroller.isFinished()){
            return false;
        }
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = (int) ev.getRawX();
                break;
            case MotionEvent.ACTION_MOVE:
                moveX = (int) ev.getRawX();
                moved = moveX - downX;
                if(haveShowRight){
                    moved-=getChildAt(1).getMeasuredWidth();
                }
                scrollTo(-moved, 0);
                if (getScrollX() <= 0) {
                    scrollTo(0, 0);
                } else if (getScrollX() >= getChildAt(1).getMeasuredWidth()) {
                    scrollTo(getChildAt(1).getMeasuredWidth(), 0);
                }
                break;
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
                    if(getScrollX()>=getChildAt(1).getMeasuredWidth()/2){
                        haveShowRight = true;
                        smoothScrollTo(getChildAt(1).getMeasuredWidth(),0);
                    }else  {
                        haveShowRight = false;
                        smoothScrollTo(0,0);
                    }
                    onScrollStateChanged.onScrollChanged(haveShowRight);

                break;

        }
        return true;
    }

操作Recyclerview

在绑定SwipMenu的时候为其监听滑动事件,在当前有未关闭的菜单,并且滑动其他菜单的时候关闭上一个菜单,为删除和编辑增加点击事件

private SwipeMenu swipeMenu;
        adapter = new CommonAdapter<String>(this, R.layout.item_test2, data) {
            @Override
            protected void convert(final ViewHolder holder, final String s, final int position) {
                holder.setText(R.id.tv, s);
                ((SwipeMenu) holder.getView(R.id.vg)).setOnScrollStateChanged(new SwipeMenu.onScrollStateChanged() {
                    @Override
                    public void onScrollChanged(boolean haveShowRight) {
                        if(swipeMenu == holder.getView(R.id.vg)){
                            return;
                        }
                        closeAllMenu();
                       if(haveShowRight){
                           swipeMenu =  holder.getView(R.id.vg);
                       }else {
                           swipeMenu = null;
                       }
                    }
                });
                holder.setOnClickListener(R.id.tv_del, new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        closeAllMenu();
                        Toast.makeText(MainActivity.this,"删除"+position,Toast.LENGTH_SHORT).show();
                    }
                });
                holder.setOnClickListener(R.id.tv_edit, new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        closeAllMenu();
                        Toast.makeText(MainActivity.this,"编辑"+position,Toast.LENGTH_SHORT).show();
                    }
                });
            }
        };

    private void closeAllMenu() {
        if(swipeMenu !=null){
            swipeMenu.closeMenu();
        }
    }

RecyclerView滑动状态发生改变时候,关闭所有Menu

        recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                closeAllMenu();
            }


            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);

            }
        });
        recyclerView.setAdapter(adapter);
    }

SwipMenu代码地址

更新

上面的代码侵入性较强,需要Recyclerview和Adapter操作较多,使用一个static SwipMenu来实现侵入性较小的view

效果图

ScreenGif6.gif

去掉了Recyclerview监听滑动状态的代码,以及adapter中监听SwipeMenu滑动状态,去掉了SwipeMenu中拦截事件的代码

SwipeMenu

代码更少,使用更方便

package com.administrator.customviewtest.successview;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Scroller;

/**
 * Created by Administrator on 2017/6/27.
 */

public class SwipeMenu extends ViewGroup {
    private int downX, moveX, moved;
    private Scroller scroller = new Scroller(getContext());
    private boolean haveShowRight = false;
    public static SwipeMenu swipeMenu;


    public SwipeMenu(Context context) {
        super(context);
    }


    public SwipeMenu(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SwipeMenu(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        if (swipeMenu != null) {
            swipeMenu.closeMenus();
            swipeMenu = null;
        }

    }

    //缓慢滚动到指定位置
    private void smoothScrollTo(int destX, int destY) {
        int scrollX = getScrollX();
        int delta = destX - scrollX;
        //1000ms内滑动destX,效果就是慢慢滑动
        scroller.startScroll(scrollX, 0, delta, 0, 100);
        invalidate();
    }

    public void closeMenus() {
        smoothScrollTo(0, 0);
        haveShowRight = false;
    }

    public static void closeMenu() {
        swipeMenu.closeMenus();
    }

    @Override
    public void computeScroll() {
        if (scroller.computeScrollOffset()) {
            scrollTo(scroller.getCurrX(), scroller.getCurrY());
            postInvalidate();
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (!scroller.isFinished()) {
            return false;
        }
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = (int) ev.getRawX();
                break;
            case MotionEvent.ACTION_MOVE:
                if (swipeMenu != null && swipeMenu == this && haveShowRight) {
                    closeMenu();
                    return true;
                }
                moveX = (int) ev.getRawX();

                moved = moveX - downX;

                if (haveShowRight) {
                    moved -= getChildAt(1).getMeasuredWidth();
                }
                scrollTo(-moved, 0);
                if (getScrollX() <= 0) {
                    scrollTo(0, 0);
                } else if (getScrollX() >= getChildAt(1).getMeasuredWidth()) {
                    scrollTo(getChildAt(1).getMeasuredWidth(), 0);
                }
                break;
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
                if (swipeMenu != null) {
                    closeMenu();
                }
                if (getScrollX() >= getChildAt(1).getMeasuredWidth() / 2) {
                    haveShowRight = true;
                    swipeMenu = this;
                    smoothScrollTo(getChildAt(1).getMeasuredWidth(), 0);
                } else {
                    haveShowRight = false;
                    smoothScrollTo(0, 0);
                }

                break;

        }
        return true;
    }

    @Override
    public LayoutParams generateLayoutParams(AttributeSet attrs) {
        return new MarginLayoutParams(getContext(), attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        measureChildren(widthMeasureSpec, heightMeasureSpec);

        int width = MeasureSpec.getSize(widthMeasureSpec);
        View child = getChildAt(0);
        int margin =
                ((MarginLayoutParams) child.getLayoutParams()).topMargin +
                        ((MarginLayoutParams) child.getLayoutParams()).bottomMargin;
        setMeasuredDimension(width, getChildAt(0).getMeasuredHeight() + margin);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int cCount = getChildCount();
        for (int i = 0; i < cCount; i++) {
            View child = getChildAt(i);
            if (i == 0) {
                child.layout(l, t, r, b);
            } else if (i == 1) {
                child.layout(r, t, r + child.getMeasuredWidth(), b);
            }
        }
    }
}

使用方法

只需要在合适的地方调用 SwipeMenu.closeMenu();即可关闭菜单

public class MainActivity extends AppCompatActivity {
    private RecyclerView recyclerView;
    private CommonAdapter<String> adapter;
    private List<String> data = Arrays.asList("0", "1", "2", "3", "4", "5", "6", "7", "8", "9","10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21");
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerView = ((RecyclerView) findViewById(R.id.rv));
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
        adapter = new CommonAdapter<String>(this, R.layout.item_test2, data) {
            @Override
            protected void convert(final ViewHolder holder, final String s, final int position) {
                holder.setText(R.id.tv, s);
                holder.setOnClickListener(R.id.tv_del, new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        SwipeMenu.closeMenu();
                        Toast.makeText(MainActivity.this,"删除"+position,Toast.LENGTH_SHORT).show();
                    }
                });
                holder.setOnClickListener(R.id.tv_edit, new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        SwipeMenu.closeMenu();
                        Toast.makeText(MainActivity.this,"编辑"+position,Toast.LENGTH_SHORT).show();
                    }
                });
            }
        };
        recyclerView.setAdapter(adapter);
    }
}

完整代码

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