最近做專案，用到水平ListView，對於此，網上已經有很多人寫過了，比較有名的就是HorizontalListView.java。但是如果要實現箭頭的提示（哪邊可滑動，即有箭頭提示往哪邊可滑動）的功能，則無法實現。而且在網上也沒有找到相關的功能，於是，菜鳥嘗試自己動手寫一個，效果如圖，還請大神批評指正。

主要是在HorizontalListView.java中新增一個介面，並實現其呼叫。

介面如下：

    
    public void setOnHLVStateListener(OnHLVStateListener listener) {
        hlvStateListener = listener;
    }

    public interface OnHLVStateListener {
        void onScrollMostLeft();

        void onScrollMiddle();

        void onScrollMostRight();

    }

    @Override
    public void setOnItemSelectedListener(
            OnItemSelectedListener listener) {

        mOnItemSelected = listener;
    }
 

  @Override
    protected synchronized void onLayout(boolean changed, int left, int top,
            int right, int bottom) {

        super.onLayout(changed, left, top, right, bottom);

        if (mAdapter == null) {
            return;
        }

        if (mDataChanged) {
            int oldCurrentX = mCurrentX;
            initView();
            removeAllViewsInLayout();
            mNextX = oldCurrentX;
            mDataChanged = false;
        }

        if (mScroller.computeScrollOffset()) {
            int scrollx = mScroller.getCurrX();
            mNextX = scrollx;
        }

        if (mNextX <= 0) {
            mNextX = 0;
            hlvStateListener.onScrollMostLeft();
            mScroller.forceFinished(true);
        }else  if (mNextX >= mMaxX) {
            mNextX = mMaxX;
            hlvStateListener.onScrollMostRight();
            mScroller.forceFinished(true);
        }else  {
        	hlvStateListener.onScrollMiddle();
        }

        int dx = mCurrentX - mNextX;

        removeNonVisibleItems(dx);
        fillList(dx);
        positionItems(dx);

        mCurrentX = mNextX;

        if (!mScroller.isFinished()) {
            post(new Runnable() {

                @Override
                public void run() {

                    requestLayout();
                }
            });

        }
    }
 

然後在MainActivity中監聽就行

package com.content.henry.horizonarrowdemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    HorizontalListView hl;
    ImageView left, right;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String[] title = new String[]{"美食", "酒店", "交通", "娛樂", "購物", "遊玩", "更多"};
        int[] icons = new int[]{R.mipmap.food, R.mipmap.food, R.mipmap.food, R.mipmap.food, R.mipmap.food,
                R.mipmap.food, R.mipmap.food};
        hl = (HorizontalListView) findViewById(R.id.hlview);
        left = (ImageView) findViewById(R.id.left);
        right = (ImageView) findViewById(R.id.right);
        HorizontalListViewAdapter adapter = new HorizontalListViewAdapter(this, title, icons);
        hl.setAdapter(adapter);

        hl.setOnHLVStateListener(new HorizontalListView.OnHLVStateListener() {

            @Override
            public void onScrollMostRight() {
                left.setVisibility(View.VISIBLE);
                right.setVisibility(View.GONE);
            }

            @Override
            public void onScrollMostLeft() {
                left.setVisibility(View.GONE);
                right.setVisibility(View.VISIBLE);
            }

            @Override
            public void onScrollMiddle() {
                left.setVisibility(View.VISIBLE);
                right.setVisibility(View.VISIBLE);
            }
        });
    }
}
 

package com.content.henry.horizonarrowdemo;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;


public class HorizontalListViewAdapter extends BaseAdapter {

    private int[] mIconIDs;

    private String[] mTitles;

    private MainActivity mContext;

    private LayoutInflater mInflater;

    Bitmap iconBitmap;

    private int selectIndex = -1;

    public HorizontalListViewAdapter(MainActivity context, String[] titles, int[] ids) {

        this.mContext = context;
        this.mIconIDs = ids;
        this.mTitles = titles;
        mInflater =
                (LayoutInflater) mContext
                        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);// LayoutInflater.from(mContext);
    }

    @Override
    public int getCount() {

        return mIconIDs.length;
    }

    @Override
    public Object getItem(int position) {

        return position;
    }

    @Override
    public long getItemId(int position) {

        return position;
    }

    @SuppressLint("InflateParams")
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView =
                    mInflater
                            .inflate(R.layout.item,
                                    null);
            holder.mImage =
                    (ImageView) convertView.findViewById(R.id.item_yszxygy_iv);
            holder.mTitle =
                    (TextView) convertView.findViewById(R.id.item_yszxygy_tv);
            holder.ll_item =
                    (LinearLayout) convertView.findViewById(R.id.item_yszxygy);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        if (position == selectIndex) {
            convertView.setSelected(true);
        } else {
            convertView.setSelected(false);
        }

        holder.mTitle.setText(mTitles[position]);
        holder.mImage.setImageResource(mIconIDs[position]);

        WindowManager wm = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
        @SuppressWarnings("deprecation")
        int widthS = wm.getDefaultDisplay().getWidth();//��Ļ���
        @SuppressWarnings("deprecation")
        int heightS = wm.getDefaultDisplay().getHeight();

        int width =
                widthS / 4;
        int height = heightS * 1 / 5;
        LayoutParams para;
        para = holder.ll_item.getLayoutParams();
        // 設定
        para.width = width;
        para.height = height;
        holder.ll_item.setLayoutParams(para);

        return convertView;
    }

    private static class ViewHolder {

        /**
         * 標題
         */
        private TextView mTitle;

        /**
         * 圖片
         */
        private ImageView mImage;

        /**
         * 佈局
         */
        private LinearLayout ll_item;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:id="@+id/item_yszxygy"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center_horizontal"
        android:layout_weight="1"
        android:orientation="vertical">

        <View
            android:id="@+id/item_view"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="30" />

        <ImageView
            android:id="@+id/item_yszxygy_iv"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_gravity="center_horizontal"
            android:layout_weight="46"
            android:scaleType="center" />

        <TextView
            android:id="@+id/item_yszxygy_tv"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="68"
            android:gravity="center_vertical|center_horizontal"
            android:textColor="#000000"
            android:textSize="20sp" />
    </LinearLayout>

</LinearLayout>

demo地址：http://download.csdn.net/detail/henry__mark/9573358；