package com.feilu.investadviser.ui.main.widget;import android.content.Context;import android.graphics.Color;import android.util.AttributeSet;import android.util.DisplayMetrics;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.view.WindowManager;import android.widget.HorizontalScrollView;import android.widget.LinearLayout;import com.feilu.investadviser.ui.main.adapter.HorizontalScrollViewAdapter;import java.util.HashMap;import java.util.Map;public class HzScrollView extends HorizontalScrollView implements View.OnClickListener {    /**     * 图片滚动时的回调接口     *     */    public interface CurrentImageChangeListener {        void onCurrentImgChanged(int position, View viewIndicator);    }    /**     * 条目点击时的回调     *     */    public interface OnItemClickListener {        void onClick(View view, int pos);    }    private CurrentImageChangeListener mListener;    private OnItemClickListener mOnClickListener;    private static final String TAG = "HzScrollView";    /**     * HorizontalListView中的LinearLayout     */    private LinearLayout mContainer;    /**     * 子元素的宽度     */    private int mChildWidth;    /**     * 子元素的高度     */    private int mChildHeight;    /**     * 当前最后一张图片的index     */    private int mCurrentIndex;    /**     * 当前第一张图片的下标     */    private int mFristIndex;    /**     * 当前第一个View     */    private View mFirstView;    /**     * 数据适配器     */    private HorizontalScrollViewAdapter mAdapter;    /**     * 每屏幕最多显示的个数     */    private int mCountOneScreen;    /**     * 屏幕的宽度     */    private int mScreenWitdh;    /**     * 保存View与位置的键值对     */    private Map<View, Integer> mViewPos = new HashMap<View, Integer>();    public HzScrollView(Context context, AttributeSet attrs) {        super(context, attrs);        // 获得屏幕宽度        WindowManager wm = (WindowManager) context                .getSystemService(Context.WINDOW_SERVICE);        DisplayMetrics outMetrics = new DisplayMetrics();        wm.getDefaultDisplay().getMetrics(outMetrics);        mScreenWitdh = outMetrics.widthPixels;    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        mContainer = (LinearLayout) getChildAt(0);    }    /**     * 加载下一张图片     */    protected void loadNextImg() {        // 数组边界值计算        if (mCurrentIndex == mAdapter.getCount() - 1) {            return;        }        // 移除第一张图片，且将水平滚动位置置0        scrollTo(0, 0);        mViewPos.remove(mContainer.getChildAt(0));        mContainer.removeViewAt(0);        // 获取下一张图片，并且设置onclick事件，且加入容器中        View view = mAdapter.getView(++mCurrentIndex, null, mContainer);        view.setOnClickListener(this);        mContainer.addView(view);        mViewPos.put(view, mCurrentIndex);        // 当前第一张图片小标        mFristIndex++;        // 如果设置了滚动监听则触发        if (mListener != null) {            notifyCurrentImgChanged();        }    }    /**     * 加载前一张图片     */    protected void loadPreImg() {        // 如果当前已经是第一张，则返回        if (mFristIndex == 0)            return;        // 获得当前应该显示为第一张图片的下标        int index = mCurrentIndex - mCountOneScreen;        if (index >= 0) {            // mContainer = (LinearLayout) getChildAt(0);            // 移除最后一张            int oldViewPos = mContainer.getChildCount() - 1;            mViewPos.remove(mContainer.getChildAt(oldViewPos));            mContainer.removeViewAt(oldViewPos);            // 将此View放入第一个位置            View view = mAdapter.getView(index, null, mContainer);            mViewPos.put(view, index);            mContainer.addView(view, 0);            view.setOnClickListener(this);            // 水平滚动位置向左移动view的宽度个像素            scrollTo(mChildWidth, 0);            // 当前位置--，当前第一个显示的下标--            mCurrentIndex--;            mFristIndex--;            // 回调            if (mListener != null) {                notifyCurrentImgChanged();            }        }    }    /**     * 滑动时的回调     */    public void notifyCurrentImgChanged() {        // 先清除所有的背景色，点击时会设置为蓝色        for (int i = 0; i < mContainer.getChildCount(); i++) {            mContainer.getChildAt(i).setBackgroundColor(Color.WHITE);        }        mListener.onCurrentImgChanged(mFristIndex, mContainer.getChildAt(0));    }    /**     * 初始化数据，设置数据适配器     *     */    public void initDatas(HorizontalScrollViewAdapter mAdapter) {        this.mAdapter = mAdapter;        mContainer = (LinearLayout) getChildAt(0);        // 获得适配器中第一个View        final View view = mAdapter.getView(0, null, mContainer);        mContainer.addView(view);        // 强制计算当前View的宽和高        if (mChildWidth == 0 && mChildHeight == 0) {            int w = View.MeasureSpec.makeMeasureSpec(0,                    View.MeasureSpec.UNSPECIFIED);            int h = View.MeasureSpec.makeMeasureSpec(0,                    View.MeasureSpec.UNSPECIFIED);            view.measure(w, h);            mChildHeight = view.getMeasuredHeight();            mChildWidth = view.getMeasuredWidth();            Log.e(TAG, view.getMeasuredWidth() + "," + view.getMeasuredHeight());            mChildHeight = view.getMeasuredHeight();            // 计算每次加载多少个View            mCountOneScreen = mScreenWitdh / mChildWidth + 2;            Log.e(TAG, "mCountOneScreen = " + mCountOneScreen                    + " ,mChildWidth = " + mChildWidth);        }        // 初始化第一屏幕的元素        initFirstScreenChildren(mAdapter.getCount());    }    /**     * 加载第一屏的View     *     * @param mCountOneScreen     */    public void initFirstScreenChildren(int mCountOneScreen) {        mContainer = (LinearLayout) getChildAt(0);        mContainer.removeAllViews();        mViewPos.clear();        for (int i = 0; i < mCountOneScreen; i++) {            View view = mAdapter.getView(i, null, mContainer);            view.setOnClickListener(this);            mContainer.addView(view);            mViewPos.put(view, i);            mCurrentIndex = i;        }        if (mListener != null) {            notifyCurrentImgChanged();        }    }    @Override    public boolean onTouchEvent(MotionEvent ev) {        switch (ev.getAction()) {            case MotionEvent.ACTION_MOVE:                // Log.e(TAG, getScrollX() + "");                int scrollX = getScrollX();                // 如果当前scrollX为view的宽度，加载下一张，移除第一张                if (scrollX >= mChildWidth) {                    loadNextImg();                }                // 如果当前scrollX = 0， 往前设置一张，移除最后一张                if (scrollX == 0) {                    loadPreImg();                }                break;        }        return super.onTouchEvent(ev);    }    @Override    public void onClick(View v) {        if (mOnClickListener != null) {            for (int i = 0; i < mContainer.getChildCount(); i++) {                mContainer.getChildAt(i).setBackgroundColor(Color.WHITE);            }            mOnClickListener.onClick(v, mViewPos.get(v));        }    }    public void setOnItemClickListener(OnItemClickListener mOnClickListener) {        this.mOnClickListener = mOnClickListener;    }    public void setCurrentImageChangeListener(            CurrentImageChangeListener mListener) {        this.mListener = mListener;    }}

package com.feilu.investadviser.ui.main.adapter;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView;import com.feilu.investadviser.R;import com.feilu.investadviser.ui.main.bean.RanksRenQiEntity;import java.util.List;public class HorizontalScrollViewAdapter {    private Context context;    private LayoutInflater mInflater;    private List<RanksRenQiEntity.DataBean> mDatas;    public HorizontalScrollViewAdapter(Context context, List<RanksRenQiEntity.DataBean> mDatas) {        this.context = context;        mInflater = LayoutInflater.from(context);        this.mDatas = mDatas;    }    public int getCount() {        return mDatas.size();    }    public RanksRenQiEntity.DataBean getItem(int position) {        return mDatas.get(position);    }    public long getItemId(int position) {        return position;    }    public void setList(List<RanksRenQiEntity.DataBean> mDatas){        this.mDatas.clear();        this.mDatas.addAll(mDatas);    }    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder holder = null;        if (convertView == null) {            holder = new ViewHolder();            convertView = mInflater.inflate(R.layout.item_ranks_scroll,                    parent, false);//            holder.mImg = (ImageView) convertView.findViewById(R.id.img);//            holder.del = (ImageView) convertView.findViewById(R.id.del);            convertView.setTag(holder);        } else {            holder = (ViewHolder) convertView.getTag();        }        return convertView;    }    static class ViewHolder {    }}