listview首例不动其他可以横向滑动

最新推荐文章于 2021-05-25 17:17:05 发布

原创最新推荐文章于 2021-05-25 17:17:05 发布 · 1.9k 阅读

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#android #文档 #android应用 #listview #界面

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这个博客介绍了一种方法，通过自定义HorizontalScrollView（CHScrollView）和MainActivity，实现ListView的首例固定，其他部分可以横向滑动的效果。CHScrollView在onTouchEvent和onScrollChanged方法中处理滑动事件，MainActivity则负责监听和同步滑动状态。

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listview首例不动其他可以横向滑动

下载地址:http://download.youkuaiyun.com/detail/menglele1314/8640023

自定义HorizontalScrollView

public class CHScrollView extends HorizontalScrollView {

   MainActivity activity;

   public CHScrollView(Context context, AttributeSet attrs, int defStyle) {
       super(context, attrs, defStyle);
       activity = (MainActivity) context;
   }


   public CHScrollView(Context context, AttributeSet attrs) {
       super(context, attrs);
       activity = (MainActivity) context;
   }

   public CHScrollView(Context context) {
       super(context);
       activity = (MainActivity) context;
   }

   @Override
   public boolean onTouchEvent(MotionEvent ev) {
       //进行触摸赋值
       activity.mTouchView = this;
       return super.onTouchEvent(ev);
   }

   @Override
   protected void onScrollChanged(int l, int t, int oldl, int oldt) {
       //当当前的CHSCrollView被触摸时，滑动其它
       if(activity.mTouchView == this) {
           activity.onScrollChanged(l, t, oldl, oldt);
       }else{
           super.onScrollChanged(l, t, oldl, oldt);
       }
   }
}

/**
*
* 带滑动表头与固定列的ListView
*/
public class MainActivity extends Activity {
   private ListView mListView;
   // 方便测试，直接写的public
   public HorizontalScrollView mTouchView;
   // 装入所有的HScrollView
   private List<CHScrollView> mHScrollViews = new ArrayList<CHScrollView>();
   private ImageView leftOk,rightOk,leftNo,rightNo;
   private GridView gridView;
   private List<Book> datas = new ArrayList<Book>();
   private List<String> name;

   public HorizontalScrollView gTouchView;
   // 装入所有的HScrollView
   private List<GHScrollView> gHScrollViews = new ArrayList<GHScrollView>();
   private ImageView leftView;
   private ImageView rightView;

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

       initGridView();

       initListView();

   }

   private void initGridView() {
       setData();
       leftView = (ImageView) findViewById(R.id.iv_left_ok_i);
       rightView = (ImageView) findViewById(R.id.iv_right_ok_i);
       gridView = (GridView) findViewById(R.id.grid);
       GHScrollView gscroll = (GHScrollView) findViewById(R.id.grid_title);
       // 添加头滑动事件
       gHScrollViews.add(gscroll);
       int size = name.size();
       DisplayMetrics dm = new DisplayMetrics();
       getWindowManager().getDefaultDisplay().getMetrics(dm);
       float density = dm.density;
       int gridviewWidth = (int) ((size * 80) * density);
       LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
               gridviewWidth, LinearLayout.LayoutParams.WRAP_CONTENT);
       gridView.setLayoutParams(params); // 宽度
       gridView.setColumnWidth(80);
       gridView.setNumColumns(size); // 列数数量

       GridViewAdapter adapter = new GridViewAdapter(this, name);
       gridView.setAdapter(adapter);
   }

   private void initListView() {
       leftOk = (ImageView) findViewById(R.id.iv_left_ok);
       leftNo = (ImageView) findViewById(R.id.iv_left_no);
       rightOk = (ImageView) findViewById(R.id.iv_right_ok);
       rightNo = (ImageView) findViewById(R.id.iv_right_no);
       CHScrollView headerScroll = (CHScrollView) findViewById(R.id.item_scroll_title);
       // 添加头滑动事件
       mHScrollViews.add(headerScroll);
       mListView = (ListView) findViewById(R.id.scroll_list);
       for (int i = 0; i < 100; i++) {
           datas.add(new Book("book" + i, "ccc" + i, "ddd" + i, "aaa" + i,
                   "bbb" + i, "eee" + i, "fff" + i));
       }
       ListAdapter adapter = new ListAdapter(this, mHScrollViews, mListView,
               datas);
       mListView.setAdapter(adapter);
   }

   public void onGcrollChanged(int l, int t, int oldl, int oldt) {
       DisplayMetrics dm = new DisplayMetrics();
       getWindowManager().getDefaultDisplay().getMetrics(dm);
       int width = dm.widthPixels;
       Log.i("asfdsfas", l+"=="+t+"=="+oldl+"=="+oldt+"=="+width);
       if (l == 0) {
           leftView.setVisibility(View.GONE);
       } else {
           leftView.setVisibility(View.VISIBLE);
       }
       if (l > width) {
           rightView.setVisibility(View.GONE);
       } else {
           rightView.setVisibility(View.VISIBLE);
       }
       for (GHScrollView scrollView : gHScrollViews) {
           // 防止重复滑动
           if (gTouchView != scrollView)
               scrollView.smoothScrollTo(l, t);
       }
   }

   public void onScrollChanged(int l, int t, int oldl, int oldt) {
       DisplayMetrics dm = new DisplayMetrics();
       getWindowManager().getDefaultDisplay().getMetrics(dm);
       int width = dm.widthPixels;
       if (l == 0) {
           leftOk.setVisibility(View.GONE);
           leftNo.setVisibility(View.VISIBLE);
       } else {
           leftOk.setVisibility(View.VISIBLE);
           leftNo.setVisibility(View.GONE);
       }
       if (l == width) {
           rightOk.setVisibility(View.GONE);
           rightNo.setVisibility(View.VISIBLE);
       } else {
           rightOk.setVisibility(View.VISIBLE);
           rightNo.setVisibility(View.GONE);
       }
       for (CHScrollView scrollView : mHScrollViews) {
           // 防止重复滑动
           if (mTouchView != scrollView)
               scrollView.smoothScrollTo(l, t);
       }
   }

   private void setData() {
       name = new ArrayList<String>();
       name.add("深圳");
       name.add("上海");
       name.add("广州");
       name.add("北京");
       name.add("武汉");
       name.add("济南");
       name.add("南京");
       name.add("天津");
       name.add("重庆");
   }

}

适配器

public class ListAdapter extends BaseAdapter {

   private List<Book> book;
   private LayoutInflater inflater;
   private List<CHScrollView> mHScrollViews;
   private ListView mListView;
   private Context context;

   public ListAdapter(Context context, List<CHScrollView> mHScrollViews,
           ListView mListView, List<Book> book) {
       this.context = context;
       this.inflater = LayoutInflater.from(context);
       this.mHScrollViews = mHScrollViews;
       this.mListView = mListView;
       this.book = book;
   }

   @Override
   public int getCount() {
       // TODO Auto-generated method stub
       return book.size();
   }

   @Override
   public Book getItem(int position) {
       return book.get(position);
   }

   @Override
   public long getItemId(int position) {
       // TODO Auto-generated method stub
       return position;
   }

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

       ViewHolder holder = null;
       if (convertView == null) {
           convertView = inflater.inflate(R.layout.list_item, null);
           // 第一次初始化的时候装进来
           addHViews((CHScrollView) convertView.findViewById(R.id.item_scroll));
           holder = new ViewHolder();
           holder.item_title = (TextView) convertView
                   .findViewById(R.id.item_title);
           holder.item_data1 = (TextView) convertView
                   .findViewById(R.id.item_data1);
           holder.item_data2 = (TextView) convertView
                   .findViewById(R.id.item_data2);
           holder.item_data3 = (TextView) convertView
                   .findViewById(R.id.item_data3);
           holder.item_data4 = (TextView) convertView
                   .findViewById(R.id.item_data4);
           holder.item_data5 = (TextView) convertView
                   .findViewById(R.id.item_data5);
           holder.item_data6 = (TextView) convertView
                   .findViewById(R.id.item_data6);
           convertView.setTag(holder);
       } else {
           holder = (ViewHolder) convertView.getTag();
       }

       final Book book = getItem(position);
       holder.item_title.setText(book.getName());
       holder.item_data1.setText(book.getA());
       holder.item_data2.setText(book.getB());
       holder.item_data3.setText(book.getC());
       holder.item_data4.setText(book.getD());
       holder.item_data5.setText(book.getE());
       holder.item_data6.setText(book.getF());
       holder.item_title.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View arg0) {
               // TODO Auto-generated method stub
               Toast.makeText(context, "xxx" + book.getName(), 1).show();
           }
       });

       return convertView;
   }

   private class ViewHolder {
       private TextView item_title;
       private TextView item_data1;
       private TextView item_data2;
       private TextView item_data3;
       private TextView item_data4;
       private TextView item_data5;
       private TextView item_data6;
   }

   public void addHViews(final CHScrollView hScrollView) {
       if (!mHScrollViews.isEmpty()) {
           int size = mHScrollViews.size();
           CHScrollView scrollView = mHScrollViews.get(size - 1);
           final int scrollX = scrollView.getScrollX();
           // 第一次满屏后，向下滑动，有一条数据在开始时未加入
           if (scrollX != 0) {
               mListView.post(new Runnable() {
                   @Override
                   public void run() {
                       // 当listView刷新完成之后，把该条移动到最终位置
                       hScrollView.scrollTo(scrollX, 0);
                   }
               });
           }
       }
       mHScrollViews.add(hScrollView);
   }

}