根据Fragment布局高度来自动适应的Viewpager

来源：互联网发布：明星页游知乎编辑：程序博客网时间：2024/05/22 23:34

在最近的项目中，要用到ViewPager，但是viewpager是放在recycleview里面，高度是不确定的，只好重写measure方法来根据子布局的高度来动态生成viewpager的高度，但是有个缺点，就是不能根据子布局的高度来收缩viewpager的高度，为了这个优化，在网上找了一个多小时，终于找到个方法，下面直接贴使用的方法:

1.将自定义viewpager放进自己的项目

package com.plyou.leintegration.view;import android.content.Context;import android.support.v4.view.ViewPager;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.widget.LinearLayout;import java.util.HashMap;import java.util.LinkedHashMap;/** * Created by admin on 2017/10/25. */public class CustomViewPager extends ViewPager {    private int current;    private int height = 0;    /**     * 保存position与对于的View     */    private HashMap<Integer, View> mChildrenViews = new LinkedHashMap<Integer, View>();    private boolean scrollble = true;    public CustomViewPager(Context context) {        super(context);    }    public CustomViewPager(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        if (mChildrenViews.size() > current) {            View child = mChildrenViews.get(current);            if (child != null) {                child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));                height = child.getMeasuredHeight();            }        }        heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);        super.onMeasure(widthMeasureSpec, heightMeasureSpec);    }    public void resetHeight(int current) {        this.current = current;        if (mChildrenViews.size() > current) {            LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) getLayoutParams();            if (layoutParams == null) {                layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, height);            } else {                layoutParams.height = height;            }            setLayoutParams(layoutParams);        }    }    /**     * 保存position与对于的View     */    public void setObjectForPosition(View view, int position) {        mChildrenViews.put(position, view);    }    @Override    public boolean onTouchEvent(MotionEvent ev) {        if (!scrollble) {            return true;        }        return super.onTouchEvent(ev);    }    public boolean isScrollble() {        return scrollble;    }    public void setScrollble(boolean scrollble) {        this.scrollble = scrollble;    }}

2.在fragemnt的oncreatview里面调用viewpager方法

3.每次滑动viewpager重新设置高度

好了，大致完成，直接看下效果吧

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