android 解决viewpager+多个fragment+recyclerview，viewpager展示内容高度不自适应出现多余空白问题

一、首先要做的就是重写viewpager

public class MyViewPager extends ViewPager {    private int current;    private int height = 0;    /**     * 保存position与对应的View     */    private HashMap mChildrenViews = new LinkedHashMap();    private boolean scrollble = true;    public MyViewPager(Context context) {        super(context);    }    public MyViewPager(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        if (mChildrenViews.size() > current) {            View child = mChildrenViews.get(current);            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;    }}

二、在父fragment中提供一个公共的方法，给子fragment调用

 /**     * 提供子fragment调用方法，解决listview高度不自适应出现多余空白     */    public void setChildObjectForPosition(View view, int poistion) {        mViewPagerOrderform.setObjectForPosition(view, poistion);    }

三、在viewpager的onPageSelected（）方法中重置高度

viewpager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {            @Override            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {            }            @Override            public void onPageSelected(int position) {                viewpager.resetHeight(position);            }            @Override            public void onPageScrollStateChanged(int state) {            }        });

四、在子fragment的onCreateView()方法中调用父fragment的方法

@Overridepublic View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {    View view = inflater.inflate(R.layout.fragment_report_latest,container,false);    HomeFragment homeFragment = (HomeFragment) getParentFragment();    homeFragment.setChildObjectForPosition(view,0);    return view;}

原文链接：https://blog.csdn.net/qq_33650641/article/details/79483642

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