根据Fragment布局高度来自动适应的Viewpager

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