66 lines
2.3 KiB
Java
66 lines
2.3 KiB
Java
package com.gh.common.util;
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import android.content.Context;
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import android.support.v7.widget.LinearLayoutManager;
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import android.support.v7.widget.RecyclerView;
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import android.view.View;
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import android.view.ViewGroup;
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/**
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* Created by khy on 2016/8/22.
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* RecyclerView 自适应高度
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*/
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public class MeasureHeightLayoutManager extends LinearLayoutManager {
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private int[] mMeasuredDimension = new int[1];
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public MeasureHeightLayoutManager(Context context) {
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super(context);
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}
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@Override
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public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state,
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int widthSpec, int heightSpec) {
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final int heightSize = View.MeasureSpec.getSize(heightSpec);
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int height = 0;
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for (int i = 0; i < getItemCount(); i++) {
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try {
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measureScrapChild(recycler, i,
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View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
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View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
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mMeasuredDimension);
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height = height + mMeasuredDimension[0];
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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if (height > heightSize) {
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super.onMeasure(recycler, state, widthSpec, heightSpec);
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} else {
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setMeasuredDimension(View.MeasureSpec.getSize(widthSpec), height);
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}
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}
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private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
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int heightSpec, int[] measuredDimension) throws Exception {
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View view = recycler.getViewForPosition(position);
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if (view.getVisibility() == View.GONE) {
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measuredDimension[0] = 0;
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return;
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}
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super.measureChildWithMargins(view, 0, 0);
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RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();
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int childHeightSpec = ViewGroup.getChildMeasureSpec(
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heightSpec,
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getPaddingTop() + getPaddingBottom() + getDecoratedTop(view) + getDecoratedBottom(view),
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p.height);
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view.measure(0, childHeightSpec);
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measuredDimension[0] = getDecoratedMeasuredHeight(view) + p.bottomMargin + p.topMargin;
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recycler.recycleView(view);
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}
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} |