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最近有点忙，项目进度跟的比较紧。最近需求那边让我们写一个左右和上下都可滑动的列表，用来展示多个Title的值。这里我把需求简化了一下。老规矩，先看图。 在看到需求的时候，有在网上看看有没有别人造好的轮子，找是找到了，但是它是用HorizontalScrollView、ScrollView、ListView实现的，效果是有了，但是ListView没有复用了，导致我一次性加载800条数据时，界面卡顿，体验很不好。而且它的点击效果只能分别点击左边和右边，并不能点击的时候整个item都高亮。 所以，这里我就去研究了一下该怎么实现这个需求。 这里我封装了一个HRecycleView去继承RelativeLayout。 分为上下两部分 ① TitleLayout 包括左边的"名称"（固定不可滑动），右边的"Title"（多个可滑动） ② Title的数据 使用的是RecyclerView 这里只要处理水平方向的手势滑动即可，所以，我们需要去拦截手势，使用scrollTo方法实现水平滚动。请看代码的详细注释。 /** * Created by chawei on 2018/4/29. */ public class HRecyclerView extends RelativeLayout { //头部title布局 private LinearLayout mRightTitleLayout; //手指按下时的位置 private float mStartX = 0; //滑动时和按下时的差值 private int mMoveOffsetX = 0; //最大可滑动差值 private int mFixX = 0; //左边标题集合 private String[] mLeftTextList; //左边标题的宽度集合 private int[] mLeftTextWidthList; //右边标题集合 private String[] mRightTitleList = new String[]{}; //右边标题的宽度集合 private int[] mRightTitleWidthList = null; //展示数据时使用的RecycleView private RecyclerView mRecyclerView; //RecycleView的Adapter private Object mAdapter; //需要滑动的View集合 private ArrayList mMoveViewList = new ArrayList(); private Context context; //右边可滑动的总宽度 private int mRightTotalWidth = 0; //右边单个view的宽度 private int mRightItemWidth = 60; //左边view的宽度 private int mLeftViewWidth = 80; //左边view的高度 private int mLeftViewHeight=40; //触发拦截手势的最小值 private int mTriggerMoveDis=30; public HRecyclerView(Context context) { this(context, null); } public HRecyclerView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public HRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); this.context = context; } private void initView() { LinearLayout linearLayout = new LinearLayout(getContext()); linearLayout.setOrientation(LinearLayout.VERTICAL); linearLayout.addView(createHeadLayout()); linearLayout.addView(createMoveRecyclerView()); addView(linearLayout, new LayoutParams(LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); } /** * 创建头部布局 * @return */ private View createHeadLayout() { LinearLayout headLayout = new LinearLayout(getContext()); headLayout.setGravity(Gravity.CENTER); LinearLayout leftLayout = new LinearLayout(getContext()); addListHeaderTextView(mLeftTextList[0], mLeftTextWidthList[0], leftLayout); leftLayout.setGravity(Gravity.CENTER); headLayout.addView(leftLayout, 0, new ViewGroup.LayoutParams(dip2px(context, mLeftViewWidth), dip2px(context, mLeftViewHeight))); mRightTitleLayout = new LinearLayout(getContext()); for (int i = 0; i < mRightTitleList.length; i++) { addListHeaderTextView(mRightTitleList[i], mRightTitleWidthList[i], mRightTitleLayout); } headLayout.addView(mRightTitleLayout); return headLayout; } /** * 创建数据展示布局 * @return */ private View createMoveRecyclerView() { RelativeLayout linearLayout = new RelativeLayout(getContext()); mRecyclerView = new RecyclerView(getContext()); LinearLayoutManager layoutManager = new LinearLayoutManager(context); layoutManager.setOrientation(LinearLayoutManager.VERTICAL); mRecyclerView.setLayoutManager(layoutManager); if(null !=mAdapter){ if (mAdapter instanceof CommonAdapter) { mRecyclerView.setAdapter((CommonAdapter) mAdapter); mMoveViewList = ((CommonAdapter) mAdapter).getMoveViewList(); } } linearLayout.addView(mRecyclerView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); return linearLayout; } /** * 设置adapter * @param adapter */ public void setAdapter(Object adapter) { mAdapter = adapter; initView(); } /** * 设置头部title单个布局 * @param headerName * @param width * @param leftLayout * @return */ private TextView addListHeaderTextView(String headerName, int width, LinearLayout leftLayout) { TextView textView = new TextView(getContext()); textView.setText(headerName); textView.setGravity(Gravity.CENTER); leftLayout.addView(textView, width, dip2px(context, 50)); return textView; } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: mStartX = ev.getX(); break; case MotionEvent.ACTION_MOVE: int offsetX = (int) Math.abs(ev.getX() - mStartX); if (offsetX > mTriggerMoveDis) {//水平移动大于30触发拦截 return true; } else { return false; } } return super.onInterceptTouchEvent(ev); } /** * 右边可滑动的总宽度 * @return */ private int rightTitleTotalWidth() { if (0 == mRightTotalWidth) { for (int i = 0; i < mRightTitleWidthList.length; i++) { mRightTotalWidth = mRightTotalWidth + mRightTitleWidthList[i]; } } return mRightTotalWidth; } @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: return true; case MotionEvent.ACTION_MOVE: int offsetX = (int) Math.abs(event.getX() - mStartX); if (offsetX > 30) { mMoveOffsetX = (int) (mStartX - event.getX() + mFixX); if (0 > mMoveOffsetX) { mMoveOffsetX = 0; } else { //当滑动大于最大宽度时，不在滑动（右边到头了） if ((mRightTitleLayout.getWidth() + mMoveOffsetX) > rightTitleTotalWidth()) { mMoveOffsetX = rightTitleTotalWidth() - mRightTitleLayout.getWidth(); } } //跟随手指向右滚动 mRightTitleLayout.scrollTo(mMoveOffsetX, 0); if (null != mMoveViewList) { for (int i = 0; i < mMoveViewList.size(); i++) { //使每个item随着手指向右滚动 mMoveViewList.get(i).scrollTo(mMoveOffsetX, 0); } } } break; case MotionEvent.ACTION_UP: mFixX = mMoveOffsetX; //设置最大水平平移的宽度 break; } return super.onTouchEvent(event); } /** * 列表头部数据 * @param headerListData */ public void setHeaderListData(String[] headerListData) { mRightTitleList = headerListData; mRightTitleWidthList = new int[headerListData.length]; for (int i = 0; i < headerListData.length; i++) { mRightTitleWidthList[i] = dip2px(context, mRightItemWidth); } mLeftTextWidthList = new int[]{dip2px(context, mLeftViewWidth)}; mLeftTextList = new String[]{"名称"}; } }这里模拟了一次加载1W条数据，没有卡顿效果。 /** * Created by chawei on 2018/4/29. */ public class CoinActivity extends AppCompatActivity { private ArrayList mDataModels; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_stock_layout); HRecyclerView hRecyclerView= (HRecyclerView) findViewById(R.id.id_hrecyclerview); mDataModels = new ArrayList(); for(int i=0;i |
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