暴力解决recycleview跟scrollview嵌套问题

来源：互联网发布：如何恢复电脑网络设置编辑：程序博客网时间：2024/06/05 17:02

本文转载自：http://blog.csdn.net/u012721933/article/details/50953207

scrollview 嵌套recyclerview 时，recyclerview不显示，这就需要我们自己计算recyclerview的高度，比如：

ViewGroup.LayoutParams mParams = recyclerView.getLayoutParams();         mParams.height = (CommonUtils.getScreenWidthPX(getActivity()) * 480 / 720 + CommonUtils.dipToPixels(40)) * num + CommonUtils.dipToPixels(8);         mParams.width = CommonUtils.getScreenWidthPX(getActivity());         recyclerView.setLayoutParams(mParams); 1
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这中方法适合item高度比较好计算的情形，但要遇到里面的item高度不一定这就需要我们重写recyclerview的高度了，以前嵌套listview的时候我们只需重写listview 然后重写

    @Override          protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {              // TODO Auto-generated method stub              int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,                      MeasureSpec.AT_MOST);              super.onMeasure(widthMeasureSpec, expandSpec);          }  1
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但是这种方法在recyclerview重写不管用。
我们此时要重写的的是LinearLayoutManager或GridLayoutManager

    public class FullyLinearLayoutManager extends LinearLayoutManager {          private static final String TAG = FullyLinearLayoutManager.class.getSimpleName();          public FullyLinearLayoutManager(Context context) {              super(context);          }          public FullyLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {              super(context, orientation, reverseLayout);          }          private int[] mMeasuredDimension = new int[2];          @Override          public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state,                                int widthSpec, int heightSpec) {              final int widthMode = View.MeasureSpec.getMode(widthSpec);              final int heightMode = View.MeasureSpec.getMode(heightSpec);              final int widthSize = View.MeasureSpec.getSize(widthSpec);              final int heightSize = View.MeasureSpec.getSize(heightSpec);              Log.i(TAG, "onMeasure called. \nwidthMode " + widthMode                      + " \nheightMode " + heightSpec                      + " \nwidthSize " + widthSize                      + " \nheightSize " + heightSize                      + " \ngetItemCount() " + getItemCount());              int width = 0;              int height = 0;              for (int i = 0; i < getItemCount(); i++) {                  measureScrapChild(recycler, i,                          View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),                          View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),                          mMeasuredDimension);                  if (getOrientation() == HORIZONTAL) {                      width = width + mMeasuredDimension[0];                      if (i == 0) {                          height = mMeasuredDimension[1];                      }                  } else {                      height = height + mMeasuredDimension[1];                      if (i == 0) {                          width = mMeasuredDimension[0];                      }                  }              }              switch (widthMode) {                  case View.MeasureSpec.EXACTLY:                      width = widthSize;                  case View.MeasureSpec.AT_MOST:                  case View.MeasureSpec.UNSPECIFIED:              }              switch (heightMode) {                  case View.MeasureSpec.EXACTLY:                      height = heightSize;                  case View.MeasureSpec.AT_MOST:                  case View.MeasureSpec.UNSPECIFIED:              }              setMeasuredDimension(width, height);          }          private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,                                         int heightSpec, int[] measuredDimension) {              try {                  View view = recycler.getViewForPosition(0);//fix 动态添加时报IndexOutOfBoundsException                  if (view != null) {                      RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();                      int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,                              getPaddingLeft() + getPaddingRight(), p.width);                      int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,                              getPaddingTop() + getPaddingBottom(), p.height);                      view.measure(childWidthSpec, childHeightSpec);                      measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;                      measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;                      recycler.recycleView(view);                  }              } catch (Exception e) {                  e.printStackTrace();              } finally {              }          }      }  1
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    public class FullyGridLayoutManager extends GridLayoutManager {          private int mwidth = 0;          private int mheight = 0;          public FullyGridLayoutManager(Context context, int spanCount) {              super(context, spanCount);          }          public FullyGridLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout) {              super(context, spanCount, orientation, reverseLayout);          }          private int[] mMeasuredDimension = new int[2];          public int getMwidth() {              return mwidth;          }          public void setMwidth(int mwidth) {              this.mwidth = mwidth;          }          public int getMheight() {              return mheight;          }          public void setMheight(int mheight) {              this.mheight = mheight;          }          @Override          public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state, int widthSpec, int heightSpec) {              final int widthMode = View.MeasureSpec.getMode(widthSpec);              final int heightMode = View.MeasureSpec.getMode(heightSpec);              final int widthSize = View.MeasureSpec.getSize(widthSpec);              final int heightSize = View.MeasureSpec.getSize(heightSpec);              int width = 0;              int height = 0;              int count = getItemCount();              int span = getSpanCount();              for (int i = 0; i < count; i++) {                  measureScrapChild(recycler, i,                          View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),                          View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),                          mMeasuredDimension);                  if (getOrientation() == HORIZONTAL) {                      if (i % span == 0) {                          width = width + mMeasuredDimension[0];                      }                      if (i == 0) {                          height = mMeasuredDimension[1];                      }                  } else {                      if (i % span == 0) {                          height = height + mMeasuredDimension[1];                      }                      if (i == 0) {                          width = mMeasuredDimension[0];                      }                  }              }              switch (widthMode) {                  case View.MeasureSpec.EXACTLY:                      width = widthSize;                  case View.MeasureSpec.AT_MOST:                  case View.MeasureSpec.UNSPECIFIED:              }              switch (heightMode) {                  case View.MeasureSpec.EXACTLY:                      height = heightSize;                  case View.MeasureSpec.AT_MOST:                  case View.MeasureSpec.UNSPECIFIED:              }              setMheight(height);              setMwidth(width);              setMeasuredDimension(width, height);          }          private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,                                         int heightSpec, int[] measuredDimension) {              if (position < getItemCount()) {                  try {                      View view = recycler.getViewForPosition(0);//fix 动态添加时报IndexOutOfBoundsException                      if (view != null) {                          RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();                          int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,                                  getPaddingLeft() + getPaddingRight(), p.width);                          int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,                                  getPaddingTop() + getPaddingBottom(), p.height);                          view.measure(childWidthSpec, childHeightSpec);                          measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;                          measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;                          recycler.recycleView(view);                      }                  } catch (Exception e) {                      e.printStackTrace();                  }              }          }      }  1
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重写完之后，用就好说了，在adapter的onBindview和平常一样用就可以了

final FullyGridLayoutManager manager = new FullyGridLayoutManager(context.getActivity(), 3);          manager.setOrientation(GridLayoutManager.VERTICAL);          manager.setSmoothScrollbarEnabled(true);          viewHolder.recyclerView.setLayoutManager(manager); 1
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或者再activity中设置一样的

此种方法在4.x系统上好用，能显示滑动也流畅，但是在5.x上虽然显示正常，但是滑动的时候好像被粘住了，没有惯性效果。。。。然后郁闷了一下午。。。。
最后解决方法是重写最外层的Scrollview

    **       * 屏蔽 滑动事件       * Created by fc on 2015/7/16.       */      public class MyScrollview extends ScrollView {          private int downX;          private int downY;          private int mTouchSlop;          public MyScrollview(Context context) {              super(context);              mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();          }          public MyScrollview(Context context, AttributeSet attrs) {              super(context, attrs);              mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();          }          public MyScrollview(Context context, AttributeSet attrs, int defStyleAttr) {              super(context, attrs, defStyleAttr);              mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();          }          @Override          public boolean onInterceptTouchEvent(MotionEvent e) {              int action = e.getAction();              switch (action) {                  case MotionEvent.ACTION_DOWN:                      downX = (int) e.getRawX();                      downY = (int) e.getRawY();                      break;                  case MotionEvent.ACTION_MOVE:                      int moveY = (int) e.getRawY();                      if (Math.abs(moveY - downY) > mTouchSlop) {                          return true;                      }              }              return super.onInterceptTouchEvent(e);          }      }

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