HorizontalListView（包含setSelection功能）

水平横向ListView：HorizontalListView
☆推荐使用 RecyclerView：Android RecyclerView 使用完全解析体验艺术般的控件
功能列表
横向显示

子视图的宽度设置有效

match_parent : 与HorizontalListView的宽度相同

wrap_content : 宽度为自己所需宽度

固定数值 : 宽度为固定值

支持setSelection(int) setSelectionFromLeft(int, int)

支持scrollTo(int)

支持RequestFreeze

通常用于刷新数据，固定当前子视图的位置。

支持OnScrollListener
Source Code
/** * The MIT License (MIT) * Copyright (c) 2012-2014 唐虞科技(TangyuSoft) Corporation * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */package com.tangyu.component.view;import android.annotation.SuppressLint;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Paint.Style;import android.graphics.Point;import android.graphics.Rect;import android.graphics.Region;import android.text.TextUtils;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 android.widget.ImageView;import android.widget.TextView;import java.util.LinkedList;import java.util.List;/** *  * ------------------ * *****************| * *****************| * ***** MSGAREA ***| * *****************| * *****************| * ****          ***| * ****  HANDLE  ***| * ****   AREA   ***| * ****          ***| * ------------------ * 
 *  * Often use in guide
 * 
 * Cover with a black layer and multiple hollow. 
 * 
 * if touch event position in handle area. The HollowListener will be handle it.
 * 
 * u can also set a message view to hollow to display the detail of hollow.
 * * STEPS:
 * 
 *     1. create a hollow object. *     2. invoke {@link com.tangyu.component.view.TYHollowView.Hollow#calculateDelta(android.view.View, int)} to calculate the offset of hollow. *     3. create a message view, TextView ImageView or other, and set to hollow if need. *     4. if you set a message view. u can setting the position and gap params. *     5. add to hollow view. * 
 * * SIMPLE CODE: 
 *  *  TYHollowView.Hollow hollow = new TYHollowView.Hollow(item); *  TextView msgView = TYHollowView.Hollow.createSimpleTextView(this); *  msgView.setText(sb.toString()); *  Point delta = TYHollowView.Hollow.calculateDelta(item, mRootView.getId()); *  hollow.setDelta(delta); *  hollow.setPosition(position[i % position.length]); *  hollow.setMsgView(msgView); *  hollow.setGapBetweenMsgAndHollow((i + 1) * 20); *  mRootView.addHollow(hollow); * 
 * * @author bin */public class TYHollowView extends FrameLayout {    /**     * log level should be greater than DEBUG.     * if you want to show log info. please exec command as follow:     * adb shell log.tag.TY DEBUG     */    private static final String LOG_TAG = "TY";    public static Paint getDefPaint() {        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);        paint.setTextSize(30f);        paint.setStyle(Style.STROKE);        paint.setColor(Color.WHITE);        return paint;    }    protected Paint mPaint = getDefPaint();    protected List mHollows = new LinkedList();    protected TextView mVBlackLayout;    protected HollowListener mListener;    protected Hollow mFocusHollow;    @SuppressLint("NewApi")    public TYHollowView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        int sdkInt = android.os.Build.VERSION.SDK_INT;        if (sdkInt >= 11) {            setLayerType(LAYER_TYPE_SOFTWARE, null);        }        mVBlackLayout = new TextView(context, attrs, defStyle) {            Rect rect = new Rect();            @Override            protected void onDraw(Canvas canvas) {                super.onDraw(canvas);                if (mHollows.size() > 0) {                    canvas.clipRect(0, 0, getWidth(), getHeight());                    for (Hollow hollow : mHollows) {                        if (hollow.mHandler.getVisibility() != View.VISIBLE) {                            continue;                        }                        hollow.mHandler.getHitRect(rect);                        rect.offset(hollow.mDelta.x, hollow.mDelta.y);                        canvas.clipRect(rect, Region.Op.DIFFERENCE);                    }                    canvas.drawColor(0xAA000000);                }            }        };        mVBlackLayout.setLayoutParams(new LayoutParams(                LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));        addView(mVBlackLayout);    }    public TYHollowView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public TYHollowView(Context context) {        this(context, null, 0);    }    public void addHollow(Hollow hollow) {        if (hollow != null && hollow.mVMsg != null) {            mHollows.add(hollow);            addView(hollow.mVMsg);            requestLayout();        }    }    public void removeHollow(Hollow hollow) {        if (null != mHollows && mHollows.size() > 0) {            for (Hollow item : mHollows) {                if (item.equals(hollow)) {                    mHollows.remove(item);                    // be careful if you wanna remove 'break'                    break;                }            }        }    }    public final List getHollows() {        return mHollows;    }    public void reset() {        setVisibility(View.VISIBLE);    }    @Override    public boolean onTouchEvent(MotionEvent event) {        switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:                mFocusHollow = null;                if (mHollows.size() > 0) {                    int x = (int) event.getX(), y = (int) event.getY();                    Rect rect = new Rect();                    for (Hollow hollow : mHollows) {                        hollow.mHandler.getHitRect(rect);                        if (rect.contains(x, y)) {                            mFocusHollow = hollow;                            onFocusHollowWhenTouchDown(hollow);                            break;                        }                    }                }                break;            case MotionEvent.ACTION_UP:                if (null != mListener) {                    boolean hasFocusHollow = null != mFocusHollow;                    mListener.onTappedListener(hasFocusHollow, hasFocusHollow ? mFocusHollow.mHandler : null);                }                break;        }        return true;    }    @Override    protected void onLayout(boolean changed, int left, int top, int right,                            int bottom) {        super.onLayout(changed, left, top, right, bottom);        if (mVBlackLayout.getVisibility() == View.VISIBLE) {            mVBlackLayout.layout(left, top, right, bottom);        }        for (Hollow hollow : mHollows) {            if (hollow.mVMsg != null && hollow.mVMsg.getVisibility() != View.GONE) {                Rect rect = calculateLayoutOfHollowMsgView(hollow);                onLayoutOfHollowMsgView(hollow, rect);                hollow.mVMsg.layout(rect.left, rect.top, rect.right, rect.bottom);            }        }    }    private Rect calculateLayoutOfHollowMsgView(Hollow hollow) {        Rect rect = new Rect();        Rect handleRect = new Rect();        hollow.mHandler.getHitRect(handleRect);        handleRect.offset(hollow.mDelta.x, hollow.mDelta.y);        int widthMeasureSpec, heightMeasureSpec;        switch (hollow.mPos) {            case Hollow.POS_LEFT_HOLLOW:                rect.left = 0;                rect.right = handleRect.left - hollow.mGapMsgAndHollow;                rect.top = handleRect.top;                widthMeasureSpec = MeasureSpec.makeMeasureSpec(rect.width(), MeasureSpec.AT_MOST);                heightMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.AT_MOST);                hollow.mVMsg.measure(widthMeasureSpec, heightMeasureSpec);                rect.left = rect.width() - hollow.mVMsg.getMeasuredWidth();                rect.bottom = rect.top + hollow.mVMsg.getMeasuredHeight();                break;            case Hollow.POS_TOP_HOLLOW:                rect.top = 0;                rect.bottom = handleRect.top - hollow.mGapMsgAndHollow;                widthMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.AT_MOST);                heightMeasureSpec = MeasureSpec.makeMeasureSpec(rect.height(), MeasureSpec.AT_MOST);                hollow.mVMsg.measure(widthMeasureSpec, heightMeasureSpec);                rect.top = rect.bottom - hollow.mVMsg.getMeasuredHeight();                rect.left = handleRect.centerX() - (hollow.mVMsg.getMeasuredWidth() >> 1);                rect.right = rect.left + hollow.mVMsg.getMeasuredWidth();                break;            case Hollow.POS_RIGHT_HOLLOW:                rect.left = handleRect.right + hollow.mGapMsgAndHollow;                rect.right = getMeasuredWidth() - rect.left;                rect.top = handleRect.top;                widthMeasureSpec = MeasureSpec.makeMeasureSpec(rect.width(), MeasureSpec.AT_MOST);                heightMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.AT_MOST);                hollow.mVMsg.measure(widthMeasureSpec, heightMeasureSpec);                rect.right = rect.left + hollow.mVMsg.getMeasuredWidth();                rect.bottom = rect.top + hollow.mVMsg.getMeasuredHeight();                break;            case Hollow.POS_BOTTOM_HOLLOW:                rect.top = handleRect.bottom + hollow.mGapMsgAndHollow;                rect.bottom = getMeasuredHeight();                widthMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.AT_MOST);                heightMeasureSpec = MeasureSpec.makeMeasureSpec(rect.height(), MeasureSpec.AT_MOST);                hollow.mVMsg.measure(widthMeasureSpec, heightMeasureSpec);                rect.bottom = rect.top + hollow.mVMsg.getMeasuredHeight();                rect.left = handleRect.centerX() - (hollow.mVMsg.getMeasuredWidth() >> 1);                rect.right = rect.left + hollow.mVMsg.getMeasuredWidth();                break;        }        log("w = " + hollow.mVMsg.getMeasuredWidth() + "|h = " + hollow.mVMsg.getMeasuredHeight());        log(rect.toString());        return rect;    }    @Override    protected void onDraw(Canvas canvas) {        // super.onDraw(canvas);        if (getVisibility() == View.VISIBLE) {            if (mVBlackLayout.getVisibility() == View.VISIBLE) {                mVBlackLayout.draw(canvas);            }            // draw msg            if (mHollows.size() > 0) {                for (Hollow h : mHollows) {                    if (h != null && h.mVMsg.getVisibility() == View.VISIBLE) {                        h.mVMsg.draw(canvas);                    }                }            }        }    }    /**     * Layout the msg view of hollow.
     *     * If you wants to change the position of msg view. Just modify the parameter ‘rect’.
     *     * The rect is absolute coordinate in this view.     *     * @param hollow     * @param rect     */    protected void onLayoutOfHollowMsgView(Hollow hollow, Rect rect) {    }    /**     * find out the hollow when user touch.     * @param hollow     */    protected void onFocusHollowWhenTouchDown(Hollow hollow) {    }    public void setOnHollowListener(HollowListener listener) {        mListener = listener;    }    public interface HollowListener {        /**         * User was tapped view.         * @param hasTappedHollow whether tapped in hollow or not.         * @param view         */        public void onTappedListener(boolean hasTappedHollow, View view);    }    public static class Hollow {        public static final int POS_LEFT_HOLLOW = 0;        public static final int POS_TOP_HOLLOW = 1;        public static final int POS_RIGHT_HOLLOW = 2;        public static final int POS_BOTTOM_HOLLOW = 3;        protected View mHandler;        protected View mVMsg;        protected Point mDelta;        protected int mPos;        protected int mGapMsgAndHollow;        public Hollow(View handler) {            mHandler = handler;        }        public static TextView createSimpleTextView(Context ctx) {            if (ctx == null) {                throw new NullPointerException("ctx is null");            }            TextView textView = new TextView(ctx);            textView.setTextColor(Color.WHITE);            textView.setLayoutParams(new LayoutParams(                    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,                    Gravity.CENTER_HORIZONTAL));            return textView;        }        public static ImageView createSimpleImageView(Context ctx) {            if (ctx == null) {                throw new NullPointerException("ctx is null");            }            ImageView imageView = new ImageView(ctx);            imageView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,                    ViewGroup.LayoutParams.WRAP_CONTENT));            imageView.setScaleType(ImageView.ScaleType.CENTER);            return imageView;        }        /**         * To calculate the absolute coordinate between view with its super view.         * @param handleView         * @param dependViewId the super ID of handleView.         * @return         */        public static Point calculateDelta(View handleView, int dependViewId) {            if (handleView == null) {                throw new NullPointerException("handleView is null");            }            ViewGroup parent;            Point delta = new Point();//log("DDDD " + delta.x + " | " + delta.y);            parent = (ViewGroup) handleView.getParent();            delta.offset(parent.getLeft(), parent.getTop());//log("DDDD " + delta.x + " | " + delta.y);            while (parent != null && parent.getId() != dependViewId) {                parent = (ViewGroup) parent.getParent();                if (parent != null) {                    delta.offset(parent.getLeft(), parent.getTop());//log("DDDD " + delta.x + " | " + delta.y);                }            }            return delta;        }        public void setDelta(Point delta) {            if (delta == null) {                throw new NullPointerException();            }            mDelta = delta;        }        public void setPosition(int position) {            if (position < 0 || position > 3) {                throw new IllegalArgumentException();            }            mPos = position;        }        public void setMsgView(View msgView) {            mVMsg = msgView;        }        public void setGapBetweenMsgAndHollow(int gap) {            mGapMsgAndHollow = gap;        }    }    private static void log(String info) {        if (Log.isLoggable(LOG_TAG, Log.DEBUG)) {            if (!TextUtils.isEmpty(info)) Log.d(LOG_TAG, info);        }    }}
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