返回 登录
0

Android自定义组合控件---教你如何自定义下拉刷新和左滑删除

绪论

最近项目里面用到了下拉刷新和左滑删除,网上找了找并没有可以用的,有比较好的左滑删除,但是并没有和下拉刷新上拉加载结合到一起,要不就是一些比较水的结合,并不能在项目里面使用,小编一着急自己组合了一个,做完了和QQ的对比了一下,并没有太大区别,今天分享给大家,其实并不难,但是不知道为什么网上没有比较好的Demo,当你的项目真的很急的时候,又没有比较好的Demo,那么“那条友谊的小船儿真是说翻就翻啊”,好了,下面先来具体看一下实现后的效果吧:

代码已经上传到Github上了,小伙伴们记得star和follow哦
https://github.com/Hankkin/SwipeRefreshDemo

这里写图片描述
还不错吧?比QQ多了个上拉加载,好了看看怎么实现的吧,小编在之前的游客评论中了解到,代码注释很重要,所以尽量把注释写的很清楚:

实现思路

由于时间有限,左滑菜单是在网上找的Demo

  1. 自定义下拉刷新头、尾
  2. 手势判断,根据滑动距离显示头部下拉布局
  3. 判断是否滑动到底部显示尾部上拉布局
  4. 创建左滑菜单,根据手势滑动事件弹出菜单

详细的看一下实现过程
1.首先我们先自定义下拉头布局:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="bottom" >

    <RelativeLayout
        android:id="@+id/xlistview_header_content"
        android:layout_width="fill_parent"
        android:background="#00000000"
        android:layout_height="60dp" >

        <LinearLayout
            android:id="@+id/xlistview_header_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:gravity="center"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/xlistview_header_hint_textview"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#000"
                android:textSize="16sp"
                android:text="@string/xlistview_header_hint_normal" />

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="3dp" >

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#000"
                    android:text="@string/xlistview_header_last_time"
                    android:textSize="14sp" />

                <TextView
                    android:id="@+id/xlistview_header_time"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#000"
                    android:textSize="14sp" />
            </LinearLayout>
        </LinearLayout>

        <ImageView
            android:id="@+id/xlistview_header_arrow"
            android:layout_width="wrap_content"
            android:layout_height="35dp"
            android:layout_alignLeft="@id/xlistview_header_text"
            android:layout_centerVertical="true"
            android:layout_marginLeft="-50dp"
            android:src="@drawable/xlistview_arrow" />

        <ProgressBar
            android:id="@+id/xlistview_header_progressbar"
            android:layout_width="25dp"
            android:layout_height="25dp"
            android:layout_alignLeft="@id/xlistview_header_text"
            android:layout_centerVertical="true"
            android:layout_marginLeft="-55dp"
            android:visibility="gone"/>
    </RelativeLayout>

</LinearLayout>

2.接下来我们自定义HeaderView,代码很详细了,不多介绍了

package com.hankkin.library;

import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;



public class RefreshListHeader extends LinearLayout {
    //根布局
    private LinearLayout mContainer;
    //下拉箭头图片
    private ImageView mArrowImageView;
    //下拉进度条
    private ProgressBar mProgressBar;
    //下拉文本
    private TextView mHintTextView;
    //状态值 0-正常 1-准备刷新  2-正在刷新
    private int mState = STATE_NORMAL;

    //抬起动画
    private Animation mRotateUpAnim;
    //下拉动画
    private Animation mRotateDownAnim;

    //下拉动画时间
    private final int ROTATE_ANIM_DURATION = 180;

    public final static int STATE_NORMAL = 0;
    public final static int STATE_READY = 1;
    public final static int STATE_REFRESHING = 2;

    public RefreshListHeader(Context context) {
        super(context);
        initView(context);
    }

    /**
     * @param context
     * @param attrs
     */
    public RefreshListHeader(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView(context);
    }

    /**
     * 初始化组件
     * @param context
     */
    private void initView(Context context) {
        LayoutParams lp = new LayoutParams(LayoutParams.FILL_PARENT, 0);
        mContainer = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.xlistview_header, null);
        addView(mContainer, lp);
        setGravity(Gravity.BOTTOM);

        mArrowImageView = (ImageView) findViewById(R.id.xlistview_header_arrow);
        mHintTextView = (TextView) findViewById(R.id.xlistview_header_hint_textview);
        mProgressBar = (ProgressBar) findViewById(R.id.xlistview_header_progressbar);
        //设置抬起动画
        mRotateUpAnim = new RotateAnimation(0.0f, -180.0f, Animation.RELATIVE_TO_SELF, 0.5f,
                Animation.RELATIVE_TO_SELF, 0.5f);
        mRotateUpAnim.setDuration(ROTATE_ANIM_DURATION);
        mRotateUpAnim.setFillAfter(true);
        //设置下拉动画
        mRotateDownAnim = new RotateAnimation(-180.0f, 0.0f, Animation.RELATIVE_TO_SELF, 0.5f,
                Animation.RELATIVE_TO_SELF, 0.5f);
        mRotateDownAnim.setDuration(ROTATE_ANIM_DURATION);
        mRotateDownAnim.setFillAfter(true);
    }
    //设置状态
    public void setState(int state) {
        if (state == mState)
            return;
        //正在刷新时-显示进度条,隐藏下拉箭头
        if (state == STATE_REFRESHING) {
            mArrowImageView.clearAnimation();
            mArrowImageView.setVisibility(View.INVISIBLE);
            mProgressBar.setVisibility(View.VISIBLE);
        } else {
            //显示下拉箭头,隐藏进度条
            mArrowImageView.setVisibility(View.VISIBLE);
            mProgressBar.setVisibility(View.INVISIBLE);
        }

        switch (state) {
        case STATE_NORMAL:
            if (mState == STATE_READY) {//准备刷新时开启动画
                mArrowImageView.startAnimation(mRotateDownAnim);
            }
            if (mState == STATE_REFRESHING) {//正在刷新时开启动画
                mArrowImageView.clearAnimation();
            }
            mHintTextView.setText(R.string.xlistview_header_hint_normal);
            break;
        case STATE_READY:
            if (mState != STATE_READY) {
                mArrowImageView.clearAnimation();
                mArrowImageView.startAnimation(mRotateUpAnim);
                mHintTextView.setText(R.string.xlistview_header_hint_ready);
            }
            break;
        case STATE_REFRESHING:
            mHintTextView.setText(R.string.xlistview_header_hint_loading);
            break;
        default:
        }

        mState = state;
    }

    /**
     * 设置头部高度
     * @param height
     */
    public void setVisiableHeight(int height) {
        if (height < 0)
            height = 0;
        LayoutParams lp = (LayoutParams) mContainer.getLayoutParams();
        lp.height = height;
        mContainer.setLayoutParams(lp);
    }

    public int getVisiableHeight() {
        return mContainer.getHeight();
    }

}

3.HeaderView定义结束后,我们需要自定义一个既支持下拉刷新又支持左滑删除的ListView,看看我是怎么做的:(左滑菜单是引用网上的Demo,代码写的也比较易懂,这里不详细给大家介绍了)
然后我们在他的基础上添加下拉上拉事件:(重点看一下onTouchEvent事件)

@Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (mLastY == -1) { //获取上次y轴坐标
            mLastY = ev.getRawY();
        }

        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:   //手势按下事件、获取坐标、设置上次下拉时间
                firstTouchY = ev.getRawY();
                mLastY = ev.getRawY();
                setRefreshTime(RefreshTime.getRefreshTime(getContext()));
                int oldPos = mTouchPosition;
                mDownX = ev.getX();
                mDownY = ev.getY();
                mTouchState = TOUCH_STATE_NONE;

                mTouchPosition = pointToPosition((int) ev.getX(), (int) ev.getY());

                //弹出左滑菜单
                if (mTouchPosition == oldPos && mTouchView != null && mTouchView.isOpen()) {
                    mTouchState = TOUCH_STATE_X;
                    mTouchView.onSwipe(ev);//左滑菜单手势监听事件,根据滑动距离弹出菜单
                    return true;
                }


                //获取item view,此方法是因为getChildAt()传入index值导致listview不可见的item会报空指针
                // 防止listview不可见的item获取到的为空,使用下面方法
                View view = getChildAt(mTouchPosition - getFirstVisiblePosition());

                if (mTouchView != null && mTouchView.isOpen()) {//如果滑动的item不为空并且已经开启,则关闭该菜单
                    mTouchView.smoothCloseMenu();
                    mTouchView = null;
                    return super.onTouchEvent(ev);
                }

                if (mTouchView != null) {//否则打开左滑菜单
                    mTouchView.onSwipe(ev);
                }
                if (view instanceof SwipeMenuLayout) {
                    mTouchView = (SwipeMenuLayout) view;
                }

                break;
            case MotionEvent.ACTION_MOVE://手势滑动事件
                final float deltaY = ev.getRawY() - mLastY;
                float dy = Math.abs((ev.getY() - mDownY));
                float dx = Math.abs((ev.getX() - mDownX));
                mLastY = ev.getRawY();
                //判断左滑菜单是否未激活、或者x轴偏移平方小于y轴偏移平方3倍的时候
                if ((mTouchView == null || !mTouchView.isActive()) && Math.pow(dx, 2) / Math.pow(dy, 2) <= 3) {
                    //判断第一个可见位置并且头部布局可见高度大于0时或者y轴偏移量>0
                    if (getFirstVisiblePosition() == 0 && (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {
                        // 重新更新头部高度
                        updateHeaderHeight(deltaY / OFFSET_RADIO);
                        invokeOnScrolling();
                    }
                }

                if (mTouchState == TOUCH_STATE_X) {//如果x轴偏移弹出左滑菜单
                    if (mTouchView != null) {
                        mTouchView.onSwipe(ev);
                    }
                    getSelector().setState(new int[] { 0 });
                    ev.setAction(MotionEvent.ACTION_CANCEL);
                    super.onTouchEvent(ev);
                    return true;
                } else if (mTouchState == TOUCH_STATE_NONE) {
                    if (Math.abs(dy) > MAX_Y) { //如果y轴偏移量>指定y轴偏移量,设置y轴偏移状态
                        mTouchState = TOUCH_STATE_Y;
                    } else if (dx > MAX_X) {//如果x轴偏移量>指定x轴偏移量,设置x轴偏移状态,开始弹出左滑菜单
                        mTouchState = TOUCH_STATE_X;
                        if (mOnSwipeListener != null) {
                            mOnSwipeListener.onSwipeStart(mTouchPosition);
                        }
                    }
                }
                break;
            case MotionEvent.ACTION_UP://手势抬起事件
                mLastY = -1; // reset
                if (getFirstVisiblePosition() == 0) {
                    // 设置下拉刷新状态值,开启下拉刷新状态
                    if (mEnablePullRefresh && mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
                        mPullRefreshing = true;
                        mHeaderView.setState(RefreshListHeader.STATE_REFRESHING);
                        if (onRefreshListener != null) {
                            tag=REFRESH;
                            onRefreshListener.onRefresh();
                        }
                    }
                    resetHeaderHeight();
                }

                lastTouchY = ev.getRawY();//获取上次y轴偏移量
                if (canLoadMore()) {//判断是否满足上拉
                    loadData();
                }

                if (mTouchState == TOUCH_STATE_X) {//如果为x轴偏移状态,开启左滑
                    if (mTouchView != null) {
                        mTouchView.onSwipe(ev);
                        if (!mTouchView.isOpen()) {
                            mTouchPosition = -1;
                            mTouchView = null;
                        }
                    }
                    if (mOnSwipeListener != null) {
                        mOnSwipeListener.onSwipeEnd(mTouchPosition);
                    }
                    ev.setAction(MotionEvent.ACTION_CANCEL);
                    super.onTouchEvent(ev);
                    return true;
                }
                break;
        }
        return super.onTouchEvent(ev);
    }

当然这部分也是滑动冲突解决的主要部分,看一下完整的代码,应该能够看的懂了,小编几乎每一句都加上了注释,如果有看不明白的地方可以留言,小编会及时回复的:

package com.hankkin.library;

import android.content.Context;
import android.os.AsyncTask;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.Interpolator;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;

import java.util.Date;

public class RefreshSwipeMenuListView extends ListView implements OnScrollListener {

    private static final int TOUCH_STATE_NONE = 0;
    private static final int TOUCH_STATE_X = 1; //x轴触摸状态值
    private static final int TOUCH_STATE_Y = 2; //y轴触摸状态值
    public static final int BOTH=2;//上拉和下拉
    public static final int HEADER=0;//下拉
    public static final int FOOTER=1;//上拉
    public static String tag;//ListView的动作
    public static final String REFRESH="refresh";
    public static final String LOAD="load";
    private int MAX_Y = 5;  //Y轴最大偏移量
    private int MAX_X = 3;  //X轴最大偏移量
    private float mDownX;   //触摸x
    private float mDownY;   //触摸y
    private int mTouchState;    //触摸状态
    private int mTouchPosition; //触摸位置
    private SwipeMenuLayout mTouchView; //滑动弹出布局
    private OnSwipeListener mOnSwipeListener;   //弹出监听器

    private float firstTouchY;  //第一次触摸y坐标
    private float lastTouchY;   //最后一次触摸y坐标
    //创建左滑菜单接口
    private SwipeMenuCreator mMenuCreator;
    //菜单点击事件
    private OnMenuItemClickListener mOnMenuItemClickListener;
    //关闭菜单动画修饰Interpolator
    private Interpolator mCloseInterpolator;
    //开启菜单动画修饰Interpolator
    private Interpolator mOpenInterpolator;

    private float mLastY = -1;
    private Scroller mScroller;
    private OnScrollListener mScrollListener; // 滑动监听

    // 下拉上拉监听器
    private OnRefreshListener onRefreshListener;

    //下拉头
    private RefreshListHeader mHeaderView;

    //头部视图内容,用来计算头部高度,不下拉时隐藏
    private RelativeLayout mHeaderViewContent;
    //下拉时间文本控件
    private TextView mHeaderTimeView;
    private int mHeaderViewHeight; // 头部高度
    private boolean mEnablePullRefresh = true;//能否下拉刷新
    private boolean mPullRefreshing = false; // 是否正在刷新

    //上拉尾部视图
    private LinearLayout mFooterView;
    private boolean mEnablePullLoad;//是否可以上拉加载
    private boolean mPullLoading;   //是否正在上拉
    private boolean mIsFooterReady = false;
    private int mTotalItemCount;
    private int mScrollBack;
    private final static int SCROLLBACK_HEADER = 0;
    private final static int SCROLLBACK_FOOTER = 1;

    private final static int SCROLL_DURATION = 400;
    private final static int PULL_LOAD_MORE_DELTA = 50;
    private final static float OFFSET_RADIO = 1.8f;
    private boolean isFooterVisible=false;

    public RefreshSwipeMenuListView(Context context) {
        super(context);
        init(context);
    }

    public RefreshSwipeMenuListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context);
    }

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

    /**
     * 初始化组件
     * @param context
     */
    private void init(Context context) {
        mScroller = new Scroller(context, new DecelerateInterpolator());
        super.setOnScrollListener(this);
        // 初始化头部视图
        mHeaderView = new RefreshListHeader(context);
        mHeaderViewContent = (RelativeLayout) mHeaderView.findViewById(R.id.xlistview_header_content);
        mHeaderTimeView = (TextView) mHeaderView.findViewById(R.id.xlistview_header_time);
        addHeaderView(mHeaderView);

        // 初始化尾部视图
        mFooterView = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.xlistview_footer, null, false);

        // 初始化头部高度
        mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                mHeaderViewHeight = mHeaderViewContent.getHeight();
                //向 ViewTreeObserver 注册方法,以获取控件尺寸
                getViewTreeObserver().removeGlobalOnLayoutListener(this);
            }
        });
        MAX_X = dp2px(MAX_X);
        MAX_Y = dp2px(MAX_Y);
        mTouchState = TOUCH_STATE_NONE;
    }

    /**
     * 添加适配器
     * @param adapter
     */
    @Override
    public void setAdapter(ListAdapter adapter) {
        if (mIsFooterReady == false) {  //添加尾部隐藏
            mIsFooterReady = true;
            addFooterView(mFooterView);
            mFooterView.setVisibility(GONE);
        }
        super.setAdapter(new SwipeMenuAdapter(getContext(), adapter) {
            @Override
            public void createMenu(SwipeMenu menu) {//创建左滑菜单
                if (mMenuCreator != null) {
                    mMenuCreator.create(menu);
                }
            }

            @Override
            public void onItemClick(SwipeMenuView view, SwipeMenu menu, int index) {
                if (mOnMenuItemClickListener != null) {//左滑菜单点击事件
                    mOnMenuItemClickListener.onMenuItemClick(view.getPosition(), menu, index);
                }
                if (mTouchView != null) {
                    mTouchView.smoothCloseMenu();
                }
            }
        });
    }

    public void setCloseInterpolator(Interpolator interpolator) {
        mCloseInterpolator = interpolator;
    }

    public void setOpenInterpolator(Interpolator interpolator) {
        mOpenInterpolator = interpolator;
    }

    public Interpolator getOpenInterpolator() {
        return mOpenInterpolator;
    }

    public Interpolator getCloseInterpolator() {
        return mCloseInterpolator;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        return super.onInterceptTouchEvent(ev);
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (mLastY == -1) { //获取上次y轴坐标
            mLastY = ev.getRawY();
        }

        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:   //手势按下事件、获取坐标、设置上次下拉时间
                firstTouchY = ev.getRawY();
                mLastY = ev.getRawY();
                setRefreshTime(RefreshTime.getRefreshTime(getContext()));
                int oldPos = mTouchPosition;
                mDownX = ev.getX();
                mDownY = ev.getY();
                mTouchState = TOUCH_STATE_NONE;

                mTouchPosition = pointToPosition((int) ev.getX(), (int) ev.getY());

                //弹出左滑菜单
                if (mTouchPosition == oldPos && mTouchView != null && mTouchView.isOpen()) {
                    mTouchState = TOUCH_STATE_X;
                    mTouchView.onSwipe(ev);//左滑菜单手势监听事件,根据滑动距离弹出菜单
                    return true;
                }


                //获取item view,此方法是因为getChildAt()传入index值导致listview不可见的item会报空指针
                // 防止listview不可见的item获取到的为空,使用下面方法
                View view = getChildAt(mTouchPosition - getFirstVisiblePosition());

                if (mTouchView != null && mTouchView.isOpen()) {//如果滑动的item不为空并且已经开启,则关闭该菜单
                    mTouchView.smoothCloseMenu();
                    mTouchView = null;
                    return super.onTouchEvent(ev);
                }

                if (mTouchView != null) {//否则打开左滑菜单
                    mTouchView.onSwipe(ev);
                }
                if (view instanceof SwipeMenuLayout) {
                    mTouchView = (SwipeMenuLayout) view;
                }

                break;
            case MotionEvent.ACTION_MOVE://手势滑动事件
                final float deltaY = ev.getRawY() - mLastY;
                float dy = Math.abs((ev.getY() - mDownY));
                float dx = Math.abs((ev.getX() - mDownX));
                mLastY = ev.getRawY();
                //判断左滑菜单是否未激活、或者x轴偏移平方小于y轴偏移平方3倍的时候
                if ((mTouchView == null || !mTouchView.isActive()) && Math.pow(dx, 2) / Math.pow(dy, 2) <= 3) {
                    //判断第一个可见位置并且头部布局可见高度大于0时或者y轴偏移量>0
                    if (getFirstVisiblePosition() == 0 && (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {
                        // 重新更新头部高度
                        updateHeaderHeight(deltaY / OFFSET_RADIO);
                        invokeOnScrolling();
                    }
                }

                if (mTouchState == TOUCH_STATE_X) {//如果x轴偏移弹出左滑菜单
                    if (mTouchView != null) {
                        mTouchView.onSwipe(ev);
                    }
                    getSelector().setState(new int[] { 0 });
                    ev.setAction(MotionEvent.ACTION_CANCEL);
                    super.onTouchEvent(ev);
                    return true;
                } else if (mTouchState == TOUCH_STATE_NONE) {
                    if (Math.abs(dy) > MAX_Y) { //如果y轴偏移量>指定y轴偏移量,设置y轴偏移状态
                        mTouchState = TOUCH_STATE_Y;
                    } else if (dx > MAX_X) {//如果x轴偏移量>指定x轴偏移量,设置x轴偏移状态,开始弹出左滑菜单
                        mTouchState = TOUCH_STATE_X;
                        if (mOnSwipeListener != null) {
                            mOnSwipeListener.onSwipeStart(mTouchPosition);
                        }
                    }
                }
                break;
            case MotionEvent.ACTION_UP://手势抬起事件
                mLastY = -1; // reset
                if (getFirstVisiblePosition() == 0) {
                    // 设置下拉刷新状态值,开启下拉刷新状态
                    if (mEnablePullRefresh && mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
                        mPullRefreshing = true;
                        mHeaderView.setState(RefreshListHeader.STATE_REFRESHING);
                        if (onRefreshListener != null) {
                            tag=REFRESH;
                            onRefreshListener.onRefresh();
                        }
                    }
                    resetHeaderHeight();
                }

                lastTouchY = ev.getRawY();//获取上次y轴偏移量
                if (canLoadMore()) {//判断是否满足上拉
                    loadData();
                }

                if (mTouchState == TOUCH_STATE_X) {//如果为x轴偏移状态,开启左滑
                    if (mTouchView != null) {
                        mTouchView.onSwipe(ev);
                        if (!mTouchView.isOpen()) {
                            mTouchPosition = -1;
                            mTouchView = null;
                        }
                    }
                    if (mOnSwipeListener != null) {
                        mOnSwipeListener.onSwipeEnd(mTouchPosition);
                    }
                    ev.setAction(MotionEvent.ACTION_CANCEL);
                    super.onTouchEvent(ev);
                    return true;
                }
                break;
        }
        return super.onTouchEvent(ev);
    }

    class ResetHeaderHeightTask extends AsyncTask<Void, Void, Void> {
        protected Void doInBackground(Void... params) {
            try {
                Thread.sleep(400);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return null;
        }

        protected void onPostExecute(Void result) {
            mPullRefreshing = false;
            mHeaderView.setState(RefreshListHeader.STATE_NORMAL);
            resetHeaderHeight();

        }
    }

    public void smoothOpenMenu(int position) {
        if (position >= getFirstVisiblePosition() && position <= getLastVisiblePosition()) {
            View view = getChildAt(position - getFirstVisiblePosition());
            if (view instanceof SwipeMenuLayout) {
                mTouchPosition = position;
                if (mTouchView != null && mTouchView.isOpen()) {
                    mTouchView.smoothCloseMenu();
                }
                mTouchView = (SwipeMenuLayout) view;
                mTouchView.smoothOpenMenu();
            }
        }
    }

    private int dp2px(int dp) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,
                getContext().getResources().getDisplayMetrics());
    }

    public void setMenuCreator(SwipeMenuCreator menuCreator) {
        this.mMenuCreator = menuCreator;
    }

    public void setOnMenuItemClickListener(OnMenuItemClickListener onMenuItemClickListener) {
        this.mOnMenuItemClickListener = onMenuItemClickListener;
    }

    public void setOnSwipeListener(OnSwipeListener onSwipeListener) {
        this.mOnSwipeListener = onSwipeListener;
    }

    public static interface OnMenuItemClickListener {
        void onMenuItemClick(int position, SwipeMenu menu, int index);
    }

    public static interface OnSwipeListener {
        void onSwipeStart(int position);

        void onSwipeEnd(int position);
    }

    /**
     * 设置刷新可用
     * @param enable
     */
    private void setPullRefreshEnable(boolean enable) {
        mEnablePullRefresh = enable;
        if (!mEnablePullRefresh) { // disable, hide the content
            mHeaderViewContent.setVisibility(View.INVISIBLE);
        } else {
            mHeaderViewContent.setVisibility(View.VISIBLE);
        }
    }

    /**
     * enable or disable pull up load more feature.
     * 设置加载可用
     * @param enable
     */
    private void setPullLoadEnable(boolean enable) {
        mEnablePullLoad = enable;
        if (!mEnablePullLoad) {
            mFooterView.setVisibility(GONE);
            mFooterView.setOnClickListener(null);
        } else {
            mPullLoading = false;
            mFooterView.setVisibility(VISIBLE);
            // both "pull up" and "click" will invoke load more.
            mFooterView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    startLoadMore();
                }
            });
        }
    }

    /**
     * stop refresh, reset header view.
     * 停止刷新,重置头部控件
     */
    private void stopRefresh() {
        if (mPullRefreshing == true) {
            mPullRefreshing = false;
            resetHeaderHeight();
        }
    }

    /**
     * stop load more, reset footer view.
     * 停止加载更多,重置尾部控件
     */
    private void stopLoadMore() {
        if (mPullLoading == true) {
            mPullLoading = false;
            mFooterView.setVisibility(GONE);
        }
    }

    /**
     * set last refresh time
     *
     * @param time
     */
    public void setRefreshTime(String time) {
        mHeaderTimeView.setText(time);
    }

    private void invokeOnScrolling() {
        if (mScrollListener instanceof OnXScrollListener) {
            OnXScrollListener l = (OnXScrollListener) mScrollListener;
            l.onXScrolling(this);
        }
    }

    /**
     * 更新头部高度,设置状态值
     * @param delta
     */
    private void updateHeaderHeight(float delta) {
        mHeaderView.setVisiableHeight((int) delta + mHeaderView.getVisiableHeight());
        if (mEnablePullRefresh && !mPullRefreshing) {
            if (mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
                mHeaderView.setState(RefreshListHeader.STATE_READY);
            } else {
                mHeaderView.setState(RefreshListHeader.STATE_NORMAL);
            }
        }
        setSelection(0); // scroll to top each time
    }

    /**
     * 重置头部视图高度
     */
    private void resetHeaderHeight() {
        int height = mHeaderView.getVisiableHeight();
        if (height == 0) // 不可见
            return;
        // 如果正在刷新并且头部高度没有完全显示不做操作
        if (mPullRefreshing && height <= mHeaderViewHeight) {
            return;
        }
        int finalHeight = 0; // 默认
        //如果正在刷新并且滑动高度大于头部高度
        if (mPullRefreshing && height > mHeaderViewHeight) {
            finalHeight = mHeaderViewHeight;
        }
        mScrollBack = SCROLLBACK_HEADER;
        mScroller.startScroll(0, height, 0, finalHeight - height, SCROLL_DURATION);
        // 触发computescroll
        invalidate();
    }


    /**
     * 开启上啦
     */
    private void startLoadMore() {
        mPullLoading = true;
        mFooterView.setVisibility(VISIBLE);
        if (onRefreshListener != null) {
            tag=LOAD;
            onRefreshListener.onLoadMore();
        }
    }

    @Override
    public void computeScroll() {
        if (mScroller.computeScrollOffset()) {
            if (mScrollBack == SCROLLBACK_HEADER) {
                mHeaderView.setVisiableHeight(mScroller.getCurrY());
            } 
            postInvalidate();
            invokeOnScrolling();
        }
        super.computeScroll();
    }

    @Override
    public void setOnScrollListener(OnScrollListener l) {
        mScrollListener = l;
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        if (mScrollListener != null) {
            mScrollListener.onScrollStateChanged(view, scrollState);
        }
    }

    /**
     * 滑动监听
     * @param view
     * @param firstVisibleItem
     * @param visibleItemCount
     * @param totalItemCount
     */
    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        mTotalItemCount = totalItemCount;
        if (mScrollListener != null) {
            mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
        }
        if(firstVisibleItem+visibleItemCount>=totalItemCount){
            isFooterVisible=true;
        }else{
            isFooterVisible=false;
        }
    }

    public void setOnRefreshListener(OnRefreshListener l) {
        onRefreshListener = l;
    }

    /**
     * you can listen ListView.OnScrollListener or this one. it will invoke
     * onXScrolling when header/footer scroll back.
     */
    public interface OnXScrollListener extends OnScrollListener {
        public void onXScrolling(View view);
    }

    /**
     * implements this interface to get refresh/load more event.
     */
    public interface OnRefreshListener {
        public void onRefresh();
        public void onLoadMore();
    }

    /**
     * 上拉加载和下拉刷新请求完毕
     */
    public void complete(){
        stopLoadMore();
        stopRefresh();
        if(REFRESH.equals(tag)){
            RefreshTime.setRefreshTime(getContext(),new Date());
        }
    }

    /**
     * 设置ListView的模式,上拉和下拉
     * @param mode
     */
    public void setListViewMode(int mode){
        if(mode==BOTH){
            setPullRefreshEnable(true);
            setPullLoadEnable(true);
        }else if(mode==FOOTER){
            setPullLoadEnable(true);
        }else if(mode==HEADER){
            setPullRefreshEnable(true);
        }
    }

    /**
     * 判断是否可以上蜡加载
     * @return
     */
    private boolean canLoadMore() {
        return isBottom() && !mPullLoading && isPullingUp();
    }

    /**
     * 判断是否到达底部
     * @return
     */
    private boolean isBottom() {
        if (getCount() > 0) {
            if (getLastVisiblePosition() == getAdapter().getCount() - 1 &&
                    getChildAt(getChildCount() - 1).getBottom() <= getHeight()) {
                return true;
            }
        }
        return false;
    }

    private boolean isPullingUp() {
        return (firstTouchY - lastTouchY) >= 200;
    }


    private void loadData() {
        if (onRefreshListener != null) {
            setLoading(true);
        }
    }

    /**
     * 设置是否上拉
     * @param loading
     */
    public void setLoading(boolean loading) {
        if (this == null) return;
        mPullLoading = loading;
        if (loading) {
            mFooterView.setVisibility(VISIBLE);

            setSelection(getAdapter().getCount() - 1);
            onRefreshListener.onLoadMore();
        } else {
            mFooterView.setVisibility(GONE);
            firstTouchY = 0;
            lastTouchY = 0;
        }
    }

}

定义完了之后我们是这样用的:

rsmLv.setAdapter(adapter);
        rsmLv.setListViewMode(RefreshSwipeMenuListView.HEADER);
        rsmLv.setOnRefreshListener(this);

        SwipeMenuCreator creator = new SwipeMenuCreator() {
            @Override
            public void create(SwipeMenu menu) {
                // 创建滑动选项
                SwipeMenuItem rejectItem = new SwipeMenuItem(
                        getApplicationContext());
                // 设置选项背景
                rejectItem.setBackground(new ColorDrawable(getResources().getColor(R.color.top)));
                // 设置选项宽度
                rejectItem.setWidth(dp2px(80,getApplicationContext()));
                // 设置选项标题
                rejectItem.setTitle("置顶");
                // 设置选项标题
                rejectItem.setTitleSize(16);
                // 设置选项标题颜色
                rejectItem.setTitleColor(Color.WHITE);
                // 添加选项
                menu.addMenuItem(rejectItem);

                // 创建删除选项
                SwipeMenuItem argeeItem = new SwipeMenuItem(getApplicationContext());
                argeeItem.setBackground(new ColorDrawable(getResources().getColor(R.color.del)));
                argeeItem.setWidth(dp2px(80, getApplicationContext()));
                argeeItem.setTitle("删除");
                argeeItem.setTitleSize(16);
                argeeItem.setTitleColor(Color.WHITE);
                menu.addMenuItem(argeeItem);
            }
        };

        rsmLv.setMenuCreator(creator);

        rsmLv.setOnMenuItemClickListener(new RefreshSwipeMenuListView.OnMenuItemClickListener() {
            @Override
            public void onMenuItemClick(int position, SwipeMenu menu, int index) {
                switch (index) {
                    case 0: //第一个选项
                        Toast.makeText(MainActivity.this,"您点击的是置顶",Toast.LENGTH_SHORT).show();
                        break;
                    case 1: //第二个选项
                        del(position,rsmLv.getChildAt(position+1-rsmLv.getFirstVisiblePosition()));
                        break;

                }
            }
        });

为了和QQ有着一样的体验效果,小编加了一个删除item的动画
看起来就不会太生硬了,用户体验也比较好:

/**
     * 删除item动画
     * @param index
     * @param v
     */
    private void del(final int index, View v){
        final Animation animation = (Animation) AnimationUtils.loadAnimation(v.getContext(), R.anim.list_anim);
        animation.setAnimationListener(new Animation.AnimationListener() {
            public void onAnimationStart(Animation animation) {}
            public void onAnimationRepeat(Animation animation) {}
            public void onAnimationEnd(Animation animation) {
                data.remove(index);
                adapter.notifyDataSetChanged();
                animation.cancel();
            }
        });

        v.startAnimation(animation);
    }

好了到这里了,我们的组合控件-上拉下拉+左滑删除的组合ListView就定义好了,分享出来小伙伴们以后遇到可以直接拿来用,”到时候小船儿也不会再翻了”,不合理的地方希望大家提出来,共同交流,进步。

代码已经上传到Github上了,小伙伴们记得star和follow哦
https://github.com/Hankkin/SwipeRefreshDemo

评论