android开发学习 ------- 仿QQ侧滑效果的实现

需要做一个仿QQ侧滑删除的一个效果;

一开始是毫无头绪,百度找思路,找到  https://blog.csdn.net/xiaxiazaizai01/article/details/53036994   讲述的比较清楚,就知道是涉及Android中的哪部分知识的;

然后 https://blog.csdn.net/zxt0601/article/details/53157090  有封装一个自定义ViewGroup;用法在 https://github.com/mcxtzhang/SwipeDelMenuLayout  

 1:在project的build.gradle中添加:

allprojects {
    repositories {
        google()
        jcenter()
        //侧滑菜单添加的
        maven {url "https://jitpack.io"}
    }
}

2:在app的build.gradle中添加:

dependencies {
  
    compile 'com.github.mcxtzhang:SwipeDelMenuLayout:V1.3.0'
}

3:

/**
 * Created by lemon on 2018/4/4.
 */

public class SwipeRecyclerViewActivity extends AppCompatActivity {

    List mlist;
    RecyclerView rv;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recyclerview);
        initData();
        rv = findViewById(R.id.recyclerview);
        LinearLayoutManager manager = new LinearLayoutManager(this);
        rv.setLayoutManager(manager);
        RecyclerViewAdapter adapter = new RecyclerViewAdapter(mlist,this);
        rv.setAdapter(adapter);
    }

    private void initData() {
        mlist = new ArrayList<String>();
        for (int i = 0; i < 20; i++) {
            mlist.add("data:"+i);
        }
    }
}

4:activity_recyclerview.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</RelativeLayout>

5:

/**
 * Created by lemon on 2018/4/4.
 */

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {

    private List<String> mlist;
    private Context mcxt;


    public RecyclerViewAdapter(List mlist, Context mcxt) {
        this.mlist = mlist;
        this.mcxt = mcxt;
    }

    /**
     * 加载子item布局
     */
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mcxt).inflate(R.layout.item,parent,false);
        ViewHolder holder = new ViewHolder(view);
        return holder;
    }

    /**
     * 对子item 进行赋值
     */
    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        String value = mlist.get(position);
        holder.tv_content.setText(value);
        holder.btn_delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mlist.remove(position);
                notifyDataSetChanged();
            }
        });
    }


    @Override
    public int getItemCount() {
        return mlist.size();
    }


    static class ViewHolder extends RecyclerView.ViewHolder{
        TextView tv_content;
        Button btn_top,btn_unread,btn_delete;

        public ViewHolder(View itemView) {
            super(itemView);
            tv_content = itemView.findViewById(R.id.content);
            btn_top = itemView.findViewById(R.id.btnTop);
            btn_unread = itemView.findViewById(R.id.btnUnRead);
            btn_delete = itemView.findViewById(R.id.btnDelete);
        }
    }
}

6: item.xml

<?xml version="1.0" encoding="utf-8"?>
<com.mcxtzhang.swipemenulib.SwipeMenuLayout     自定义的ViewGroup
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="100dp"
    android:clickable="true"
    android:paddingBottom="1dp"
    >
    <TextView
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="?android:attr/selectableItemBackground"
        android:gravity="center"
        android:text="项目中我是任意复杂的原ContentItem布局"/>

    <!-- 以下都是侧滑菜单的内容依序排列 -->
    <Button
        android:id="@+id/btnTop"
        android:layout_width="60dp"
        android:layout_height="match_parent"
        android:background="#d9dee4"
        android:text="置顶"
        android:textColor="@android:color/white"/>

    <Button
        android:id="@+id/btnUnRead"
        android:layout_width="80dp"
        android:layout_height="match_parent"
        android:background="#ecd50a"
        android:clickable="true"
        android:text="标记未读"
        android:textColor="@android:color/white"/>

    <Button
        android:id="@+id/btnDelete"
        android:layout_width="60dp"
        android:layout_height="match_parent"
        android:background="@color/colorAccent"
        android:text="删除"
        android:textColor="@android:color/white"/>

</com.mcxtzhang.swipemenulib.SwipeMenuLayout>

 

这样就可以达到效果了。。。

 

难点就是 自定义的ViewGroup:

/**
 * 【Item侧滑删除菜单】
 * 继承自ViewGroup,实现滑动出现删除等选项的效果,
 * 思路:跟随手势将item向左滑动,
 * 在onMeasure时 将第一个Item设为屏幕宽度
 * 【解决屏幕上多个侧滑删除菜单】:内设一个类静态View类型变量 ViewCache,存储的是当前正处于右滑状态的CstSwipeMenuItemViewGroup,
 * 每次Touch时对比,如果两次Touch的不是一个View,那么令ViewCache恢复普通状态,并且设置新的CacheView
 * 只要有一个侧滑菜单处于打开状态, 就不给外层布局上下滑动了
 * <p/>
 * 平滑滚动使用的是Scroller,20160811,最新平滑滚动又用属性动画做了,因为这样更酷炫(设置加速器不同)
 * <p/>
 * 20160824,fix 【多指一起滑我的情况】:只接第一个客人(使用一个类静态布尔变量)
 * other:
 * 1 菜单处于侧滑时,拦截长按事件
 * 2 解决侧滑时 点击 的冲突
 * 3 通过 isIos 变量控制是否是IOS阻塞式交互,默认是打开的。
 * 4 通过 isSwipeEnable 变量控制是否开启右滑菜单,默认打开。(某些场景,复用item,没有编辑权限的用户不能右滑)
 * 5 2016 09 29 add,,通过开关 isLeftSwipe支持左滑右滑
 * 6 2016 10 21 add , 增加viewChache 的 get()方法,可以用在:当点击外部空白处时,关闭正在展开的侧滑菜单。
 * 7 2016 10 22 fix , 当父控件宽度不是全屏时的bug。
 * 2016 10 22 add , 仿QQ,侧滑菜单展开时,点击除侧滑菜单之外的区域,关闭侧滑菜单。
 * 8 2016 11 03 add,判断手指起始落点,如果距离属于滑动了,就屏蔽一切点击事件。
 * 9 2016 11 04 fix 长按事件和侧滑的冲突。
 * 10 2016 11 09 add,适配GridLayoutManager,将以第一个子Item(即ContentItem)的宽度为控件宽度。
 * 11 2016 11 14 add,支持padding,且后续计划加入上滑下滑,因此不再支持ContentItem的margin属性。
 * 2016 11 14 add,修改回弹的动画,更平滑。
 * 2016 11 14 fix,微小位移的move不回回弹的bug
 * 2016 11 18,fix 当ItemView存在高度可变的情况
 * 2016 12 07,fix 禁止侧滑时(isSwipeEnable false),点击事件不受干扰。
 * 2016 12 09,fix ListView快速滑动快速删除时,偶现菜单不消失的bug。
 * Created by zhangxutong .
 * Date: 16/04/24
 */
public class SwipeMenuLayout extends ViewGroup {
    private static final String TAG = "zxt/SwipeMenuLayout";

    private int mScaleTouchSlop;//为了处理单击事件的冲突
    private int mMaxVelocity;//计算滑动速度用
    private int mPointerId;//多点触摸只算第一根手指的速度
    private int mHeight;//自己的高度
    //右侧菜单宽度总和(最大滑动距离)
    private int mRightMenuWidths;

    //滑动判定临界值(右侧菜单宽度的40%) 手指抬起时,超过了展开,没超过收起menu
    private int mLimit;

    private View mContentView;//2016 11 13 add ,存储contentView(第一个View)

    //private Scroller mScroller;//以前item的滑动动画靠它做,现在用属性动画做
    //上一次的xy
    private PointF mLastP = new PointF();
    //2016 10 22 add , 仿QQ,侧滑菜单展开时,点击除侧滑菜单之外的区域,关闭侧滑菜单。
    //增加一个布尔值变量,dispatch函数里,每次down时,为true,move时判断,如果是滑动动作,设为false。
    //在Intercept函数的up时,判断这个变量,如果仍为true 说明是点击事件,则关闭菜单。 
    private boolean isUnMoved = true;

    //2016 11 03 add,判断手指起始落点,如果距离属于滑动了,就屏蔽一切点击事件。
    //up-down的坐标,判断是否是滑动,如果是,则屏蔽一切点击事件
    private PointF mFirstP = new PointF();
    private boolean isUserSwiped;

    //存储的是当前正在展开的View
    private static SwipeMenuLayout mViewCache;

    //防止多只手指一起滑我的flag 在每次down里判断, touch事件结束清空
    private static boolean isTouching;

    private VelocityTracker mVelocityTracker;//滑动速度变量
    private android.util.Log LogUtils;

    /**
     * 右滑删除功能的开关,默认开
     */
    private boolean isSwipeEnable;

    /**
     * IOS、QQ式交互,默认开
     */
    private boolean isIos;

    private boolean iosInterceptFlag;//IOS类型下,是否拦截事件的flag

    /**
     * 20160929add 左滑右滑的开关,默认左滑打开菜单
     */
    private boolean isLeftSwipe;

    public SwipeMenuLayout(Context context) {
        this(context, null);
    }

    public SwipeMenuLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

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

    public boolean isSwipeEnable() {
        return isSwipeEnable;
    }

    /**
     * 设置侧滑功能开关
     *
     * @param swipeEnable
     */
    public void setSwipeEnable(boolean swipeEnable) {
        isSwipeEnable = swipeEnable;
    }


    public boolean isIos() {
        return isIos;
    }

    /**
     * 设置是否开启IOS阻塞式交互
     *
     * @param ios
     */
    public SwipeMenuLayout setIos(boolean ios) {
        isIos = ios;
        return this;
    }

    public boolean isLeftSwipe() {
        return isLeftSwipe;
    }

    /**
     * 设置是否开启左滑出菜单,设置false 为右滑出菜单
     *
     * @param leftSwipe
     * @return
     */
    public SwipeMenuLayout setLeftSwipe(boolean leftSwipe) {
        isLeftSwipe = leftSwipe;
        return this;
    }

    /**
     * 返回ViewCache
     *
     * @return
     */
    public static SwipeMenuLayout getViewCache() {
        return mViewCache;
    }

    private void init(Context context, AttributeSet attrs, int defStyleAttr) {
        mScaleTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
        mMaxVelocity = ViewConfiguration.get(context).getScaledMaximumFlingVelocity();
        //初始化滑动帮助类对象
        //mScroller = new Scroller(context);

        //右滑删除功能的开关,默认开
        isSwipeEnable = true;
        //IOS、QQ式交互,默认开
        isIos = true;
        //左滑右滑的开关,默认左滑打开菜单
        isLeftSwipe = true;
        TypedArray ta = context.getTheme().obtainStyledAttributes(attrs, R.styleable.SwipeMenuLayout, defStyleAttr, 0);
        int count = ta.getIndexCount();
        for (int i = 0; i < count; i++) {
            int attr = ta.getIndex(i);
            //如果引用成AndroidLib 资源都不是常量,无法使用switch case
            if (attr == R.styleable.SwipeMenuLayout_swipeEnable) {
                isSwipeEnable = ta.getBoolean(attr, true);
            } else if (attr == R.styleable.SwipeMenuLayout_ios) {
                isIos = ta.getBoolean(attr, true);
            } else if (attr == R.styleable.SwipeMenuLayout_leftSwipe) {
                isLeftSwipe = ta.getBoolean(attr, true);
            }
        }
        ta.recycle();


    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        //Log.d(TAG, "onMeasure() called with: " + "widthMeasureSpec = [" + widthMeasureSpec + "], heightMeasureSpec = [" + heightMeasureSpec + "]");
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        setClickable(true);//令自己可点击,从而获取触摸事件

        mRightMenuWidths = 0;//由于ViewHolder的复用机制,每次这里要手动恢复初始值
        mHeight = 0;
        int contentWidth = 0;//2016 11 09 add,适配GridLayoutManager,将以第一个子Item(即ContentItem)的宽度为控件宽度
        int childCount = getChildCount();

        //add by 2016 08 11 为了子View的高,可以matchParent(参考的FrameLayout 和LinearLayout的Horizontal)
        final boolean measureMatchParentChildren = MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY;
        boolean isNeedMeasureChildHeight = false;

        for (int i = 0; i < childCount; i++) {
            View childView = getChildAt(i);
            //令每一个子View可点击,从而获取触摸事件
            childView.setClickable(true);
            if (childView.getVisibility() != GONE) {
                //后续计划加入上滑、下滑,则将不再支持Item的margin
                measureChild(childView, widthMeasureSpec, heightMeasureSpec);
                //measureChildWithMargins(childView, widthMeasureSpec, 0, heightMeasureSpec, 0);
                final MarginLayoutParams lp = (MarginLayoutParams) childView.getLayoutParams();
                mHeight = Math.max(mHeight, childView.getMeasuredHeight()/* + lp.topMargin + lp.bottomMargin*/);
                if (measureMatchParentChildren && lp.height == LayoutParams.MATCH_PARENT) {
                    isNeedMeasureChildHeight = true;
                }
                if (i > 0) {//第一个布局是Left item,从第二个开始才是RightMenu
                    mRightMenuWidths += childView.getMeasuredWidth();
                } else {
                    mContentView = childView;
                    contentWidth = childView.getMeasuredWidth();
                }
            }
        }
        setMeasuredDimension(getPaddingLeft() + getPaddingRight() + contentWidth,
                mHeight + getPaddingTop() + getPaddingBottom());//宽度取第一个Item(Content)的宽度
        mLimit = mRightMenuWidths * 4 / 10;//滑动判断的临界值
        //Log.d(TAG, "onMeasure() called with: " + "mRightMenuWidths = [" + mRightMenuWidths);
        if (isNeedMeasureChildHeight) {//如果子View的height有MatchParent属性的,设置子View高度
            forceUniformHeight(childCount, widthMeasureSpec);
        }
    }

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

    /**
     * 给MatchParent的子View设置高度
     *
     * @param count
     * @param widthMeasureSpec
     * @see android.widget.LinearLayout# 同名方法
     */
    private void forceUniformHeight(int count, int widthMeasureSpec) {
        // Pretend that the linear layout has an exact size. This is the measured height of
        // ourselves. The measured height should be the max height of the children, changed
        // to accommodate the heightMeasureSpec from the parent
        int uniformMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(),
                MeasureSpec.EXACTLY);//以父布局高度构建一个Exactly的测量参数
        for (int i = 0; i < count; ++i) {
            final View child = getChildAt(i);
            if (child.getVisibility() != GONE) {
                MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
                if (lp.height == LayoutParams.MATCH_PARENT) {
                    // Temporarily force children to reuse their old measured width
                    // FIXME: this may not be right for something like wrapping text?
                    int oldWidth = lp.width;//measureChildWithMargins 这个函数会用到宽,所以要保存一下
                    lp.width = child.getMeasuredWidth();
                    // Remeasure with new dimensions
                    measureChildWithMargins(child, widthMeasureSpec, 0, uniformMeasureSpec, 0);
                    lp.width = oldWidth;
                }
            }
        }
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        //LogUtils.e(TAG, "onLayout() called with: " + "changed = [" + changed + "], l = [" + l + "], t = [" + t + "], r = [" + r + "], b = [" + b + "]");
        int childCount = getChildCount();
        int left = 0 + getPaddingLeft();
        int right = 0 + getPaddingLeft();
        for (int i = 0; i < childCount; i++) {
            View childView = getChildAt(i);
            if (childView.getVisibility() != GONE) {
                if (i == 0) {//第一个子View是内容 宽度设置为全屏
                    childView.layout(left, getPaddingTop(), left + childView.getMeasuredWidth(), getPaddingTop() + childView.getMeasuredHeight());
                    left = left + childView.getMeasuredWidth();
                } else {
                    if (isLeftSwipe) {
                        childView.layout(left, getPaddingTop(), left + childView.getMeasuredWidth(), getPaddingTop() + childView.getMeasuredHeight());
                        left = left + childView.getMeasuredWidth();
                    } else {
                        childView.layout(right - childView.getMeasuredWidth(), getPaddingTop(), right, getPaddingTop() + childView.getMeasuredHeight());
                        right = right - childView.getMeasuredWidth();
                    }

                }
            }
        }
        //Log.d(TAG, "onLayout() called with: " + "maxScrollGap = [" + maxScrollGap + "], l = [" + l + "], t = [" + t + "], r = [" + r + "], b = [" + b + "]");
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        //LogUtils.d(TAG, "dispatchTouchEvent() called with: " + "ev = [" + ev + "]");
        if (isSwipeEnable) {
            acquireVelocityTracker(ev);
            final VelocityTracker verTracker = mVelocityTracker;
            switch (ev.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    isUserSwiped = false;//2016 11 03 add,判断手指起始落点,如果距离属于滑动了,就屏蔽一切点击事件。
                    isUnMoved = true;//2016 10 22 add , 仿QQ,侧滑菜单展开时,点击内容区域,关闭侧滑菜单。
                    iosInterceptFlag = false;//add by 2016 09 11 ,每次DOWN时,默认是不拦截的
                    if (isTouching) {//如果有别的指头摸过了,那么就return false。这样后续的move..等事件也不会再来找这个View了。
                        return false;
                    } else {
                        isTouching = true;//第一个摸的指头,赶紧改变标志,宣誓主权。
                    }
                    mLastP.set(ev.getRawX(), ev.getRawY());
                    mFirstP.set(ev.getRawX(), ev.getRawY());//2016 11 03 add,判断手指起始落点,如果距离属于滑动了,就屏蔽一切点击事件。

                    //如果down,view和cacheview不一样,则立马让它还原。且把它置为null
                    if (mViewCache != null) {
                        if (mViewCache != this) {
                            mViewCache.smoothClose();

                            iosInterceptFlag = isIos;//add by 2016 09 11 ,IOS模式开启的话,且当前有侧滑菜单的View,且不是自己的,就该拦截事件咯。
                        }
                        //只要有一个侧滑菜单处于打开状态, 就不给外层布局上下滑动了
                        getParent().requestDisallowInterceptTouchEvent(true);
                    }
                    //求第一个触点的id, 此时可能有多个触点,但至少一个,计算滑动速率用
                    mPointerId = ev.getPointerId(0);
                    break;
                case MotionEvent.ACTION_MOVE:
                    //add by 2016 09 11 ,IOS模式开启的话,且当前有侧滑菜单的View,且不是自己的,就该拦截事件咯。滑动也不该出现
                    if (iosInterceptFlag) {
                        break;
                    }
                    float gap = mLastP.x - ev.getRawX();
                    //为了在水平滑动中禁止父类ListView等再竖直滑动
                    if (Math.abs(gap) > 10 || Math.abs(getScrollX()) > 10) {//2016 09 29 修改此处,使屏蔽父布局滑动更加灵敏,
                        getParent().requestDisallowInterceptTouchEvent(true);
                    }
                    //2016 10 22 add , 仿QQ,侧滑菜单展开时,点击内容区域,关闭侧滑菜单。begin
                    if (Math.abs(gap) > mScaleTouchSlop) {
                        isUnMoved = false;
                    }
                    //2016 10 22 add , 仿QQ,侧滑菜单展开时,点击内容区域,关闭侧滑菜单。end
                    //如果scroller还没有滑动结束 停止滑动动画
/*                    if (!mScroller.isFinished()) {
                        mScroller.abortAnimation();
                    }*/
                    scrollBy((int) (gap), 0);//滑动使用scrollBy
                    //越界修正
                    if (isLeftSwipe) {//左滑
                        if (getScrollX() < 0) {
                            scrollTo(0, 0);
                        }
                        if (getScrollX() > mRightMenuWidths) {
                            scrollTo(mRightMenuWidths, 0);
                        }
                    } else {//右滑
                        if (getScrollX() < -mRightMenuWidths) {
                            scrollTo(-mRightMenuWidths, 0);
                        }
                        if (getScrollX() > 0) {
                            scrollTo(0, 0);
                        }
                    }

                    mLastP.set(ev.getRawX(), ev.getRawY());
                    break;
                case MotionEvent.ACTION_UP:
                case MotionEvent.ACTION_CANCEL:
                    //2016 11 03 add,判断手指起始落点,如果距离属于滑动了,就屏蔽一切点击事件。
                    if (Math.abs(ev.getRawX() - mFirstP.x) > mScaleTouchSlop) {
                        isUserSwiped = true;
                    }

                    //add by 2016 09 11 ,IOS模式开启的话,且当前有侧滑菜单的View,且不是自己的,就该拦截事件咯。滑动也不该出现
                    if (!iosInterceptFlag) {//且滑动了 才判断是否要收起、展开menu
                        //求伪瞬时速度
                        verTracker.computeCurrentVelocity(1000, mMaxVelocity);
                        final float velocityX = verTracker.getXVelocity(mPointerId);
                        if (Math.abs(velocityX) > 1000) {//滑动速度超过阈值
                            if (velocityX < -1000) {
                                if (isLeftSwipe) {//左滑
                                    //平滑展开Menu
                                    smoothExpand();

                                } else {
                                    //平滑关闭Menu
                                    smoothClose();
                                }
                            } else {
                                if (isLeftSwipe) {//左滑
                                    // 平滑关闭Menu
                                    smoothClose();
                                } else {
                                    //平滑展开Menu
                                    smoothExpand();

                                }
                            }
                        } else {
                            if (Math.abs(getScrollX()) > mLimit) {//否则就判断滑动距离
                                //平滑展开Menu
                                smoothExpand();
                            } else {
                                // 平滑关闭Menu
                                smoothClose();
                            }
                        }
                    }
                    //释放
                    releaseVelocityTracker();
                    //LogUtils.i(TAG, "onTouch A ACTION_UP ACTION_CANCEL:velocityY:" + velocityX);
                    isTouching = false;//没有手指在摸我了
                    break;
                default:
                    break;
            }
        }
        return super.dispatchTouchEvent(ev);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        //Log.d(TAG, "onInterceptTouchEvent() called with: ev = [" + ev + "]");
        //add by zhangxutong 2016 12 07 begin:
        //禁止侧滑时,点击事件不受干扰。
        if (isSwipeEnable) {
            switch (ev.getAction()) {
                //add by zhangxutong 2016 11 04 begin :
                // fix 长按事件和侧滑的冲突。
                case MotionEvent.ACTION_MOVE:
                    //屏蔽滑动时的事件
                    if (Math.abs(ev.getRawX() - mFirstP.x) > mScaleTouchSlop) {
                        return true;
                    }
                    break;
                //add by zhangxutong 2016 11 04 end
                case MotionEvent.ACTION_UP:
                    //为了在侧滑时,屏蔽子View的点击事件
                    if (isLeftSwipe) {
                        if (getScrollX() > mScaleTouchSlop) {
                            //add by 2016 09 10 解决一个智障问题~ 居然不给点击侧滑菜单 我跪着谢罪
                            //这里判断落点在内容区域屏蔽点击,内容区域外,允许传递事件继续向下的的。。。
                            if (ev.getX() < getWidth() - getScrollX()) {
                                //2016 10 22 add , 仿QQ,侧滑菜单展开时,点击内容区域,关闭侧滑菜单。
                                if (isUnMoved) {
                                    smoothClose();
                                }
                                return true;//true表示拦截
                            }
                        }
                    } else {
                        if (-getScrollX() > mScaleTouchSlop) {
                            if (ev.getX() > -getScrollX()) {//点击范围在菜单外 屏蔽
                                //2016 10 22 add , 仿QQ,侧滑菜单展开时,点击内容区域,关闭侧滑菜单。
                                if (isUnMoved) {
                                    smoothClose();
                                }
                                return true;
                            }
                        }
                    }
                    //add by zhangxutong 2016 11 03 begin:
                    // 判断手指起始落点,如果距离属于滑动了,就屏蔽一切点击事件。
                    if (isUserSwiped) {
                        return true;
                    }
                    //add by zhangxutong 2016 11 03 end

                    break;
            }
            //模仿IOS 点击其他区域关闭:
            if (iosInterceptFlag) {
                //IOS模式开启,且当前有菜单的View,且不是自己的 拦截点击事件给子View
                return true;
            }
        }
        return super.onInterceptTouchEvent(ev);
    }

    /**
     * 平滑展开
     */
    private ValueAnimator mExpandAnim, mCloseAnim;

    private boolean isExpand;//代表当前是否是展开状态 2016 11 03 add

    public void smoothExpand() {
        //Log.d(TAG, "smoothExpand() called" + this);
        /*mScroller.startScroll(getScrollX(), 0, mRightMenuWidths - getScrollX(), 0);
        invalidate();*/
        //展开就加入ViewCache:
        mViewCache = SwipeMenuLayout.this;

        //2016 11 13 add 侧滑菜单展开,屏蔽content长按
        if (null != mContentView) {
            mContentView.setLongClickable(false);
        }

        cancelAnim();
        mExpandAnim = ValueAnimator.ofInt(getScrollX(), isLeftSwipe ? mRightMenuWidths : -mRightMenuWidths);
        mExpandAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                scrollTo((Integer) animation.getAnimatedValue(), 0);
            }
        });
        mExpandAnim.setInterpolator(new OvershootInterpolator());
        mExpandAnim.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                isExpand = true;
            }
        });
        mExpandAnim.setDuration(300).start();
    }

    /**
     * 每次执行动画之前都应该先取消之前的动画
     */
    private void cancelAnim() {
        if (mCloseAnim != null && mCloseAnim.isRunning()) {
            mCloseAnim.cancel();
        }
        if (mExpandAnim != null && mExpandAnim.isRunning()) {
            mExpandAnim.cancel();
        }
    }

    /**
     * 平滑关闭
     */
    public void smoothClose() {
        //Log.d(TAG, "smoothClose() called" + this);
/*        mScroller.startScroll(getScrollX(), 0, -getScrollX(), 0);
        invalidate();*/
        mViewCache = null;

        //2016 11 13 add 侧滑菜单展开,屏蔽content长按
        if (null != mContentView) {
            mContentView.setLongClickable(true);
        }

        cancelAnim();
        mCloseAnim = ValueAnimator.ofInt(getScrollX(), 0);
        mCloseAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                scrollTo((Integer) animation.getAnimatedValue(), 0);
            }
        });
        mCloseAnim.setInterpolator(new AccelerateInterpolator());
        mCloseAnim.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                isExpand = false;

            }
        });
        mCloseAnim.setDuration(300).start();
        //LogUtils.d(TAG, "smoothClose() called with:getScrollX() " + getScrollX());
    }


    /**
     * @param event 向VelocityTracker添加MotionEvent
     * @see VelocityTracker#obtain()
     * @see VelocityTracker#addMovement(MotionEvent)
     */
    private void acquireVelocityTracker(final MotionEvent event) {
        if (null == mVelocityTracker) {
            mVelocityTracker = VelocityTracker.obtain();
        }
        mVelocityTracker.addMovement(event);
    }

    /**
     * * 释放VelocityTracker
     *
     * @see VelocityTracker#clear()
     * @see VelocityTracker#recycle()
     */
    private void releaseVelocityTracker() {
        if (null != mVelocityTracker) {
            mVelocityTracker.clear();
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
    }

    //每次ViewDetach的时候,判断一下 ViewCache是不是自己,如果是自己,关闭侧滑菜单,且ViewCache设置为null,
    // 理由:1 防止内存泄漏(ViewCache是一个静态变量)
    // 2 侧滑删除后自己后,这个View被Recycler回收,复用,下一个进入屏幕的View的状态应该是普通状态,而不是展开状态。
    @Override
    protected void onDetachedFromWindow() {
        if (this == mViewCache) {
            mViewCache.smoothClose();
            mViewCache = null;
        }
        super.onDetachedFromWindow();
    }

    //展开时,禁止长按
    @Override
    public boolean performLongClick() {
        if (Math.abs(getScrollX()) > mScaleTouchSlop) {
            return false;
        }
        return super.performLongClick();
    }

    //平滑滚动 弃用 改属性动画实现
/*    @Override
    public void computeScroll() {
        //判断Scroller是否执行完毕:
        if (mScroller.computeScrollOffset()) {
            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
            //通知View重绘-invalidate()->onDraw()->computeScroll()
            invalidate();
        }
    }*/

    /**
     * 快速关闭。
     * 用于 点击侧滑菜单上的选项,同时想让它快速关闭(删除 置顶)。
     * 这个方法在ListView里是必须调用的,
     * 在RecyclerView里,视情况而定,如果是mAdapter.notifyItemRemoved(pos)方法不用调用。
     */
    public void quickClose() {
        if (this == mViewCache) {
            //先取消展开动画
            cancelAnim();
            mViewCache.scrollTo(0, 0);//关闭
            mViewCache = null;
        }
    }

}

 

posted @ 2018-04-08 17:29  蒙小米  阅读(1857)  评论(0编辑  收藏  举报