ViewPager+TabLayout+Fragment刷新Fragment中的数据

Posted 2020-12-03 jeffery336699

1.ViewPager与TabLayout的初始化:

private void initData() {
        mTabFragmentAdapter = new TabFragmentFirstAdapter(getSupportFragmentManager(), mDeptType);
        mVp.setAdapter(mTabFragmentAdapter);
        mVp.addOnPageChangeListener(
                new TabLayout.TabLayoutOnPageChangeListener(mTabLayout));
        mVp.setOffscreenPageLimit(3);
        mTabLayout.setupWithViewPager(mVp);
}

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private void initData() {

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        mTabFragmentAdapter = new TabFragmentFirstAdapter(getSupportFragmentManager(), mDeptType);

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        mVp.setAdapter(mTabFragmentAdapter);

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        mVp.addOnPageChangeListener(

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                new TabLayout.TabLayoutOnPageChangeListener(mTabLayout));

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        mVp.setOffscreenPageLimit(3);

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        mTabLayout.setupWithViewPager(mVp);

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}

2.刷新主要还是靠FragmentPagerAdapter的notifyDataSetChanged()

private void reflashData(int type, List<WorkOrderBean.RowsBean> list) {
        mTabFragmentAdapter.setDataAndType(type, list);
        mTabFragmentAdapter.notifyDataSetChanged();
}

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private void reflashData(int type, List<WorkOrderBean.RowsBean> list) {

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        mTabFragmentAdapter.setDataAndType(type, list);

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        mTabFragmentAdapter.notifyDataSetChanged();

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}

3.当notify时,FragmentPagerAdapter中主要会回调getItemPosition(Object object)方法,在这里判断是哪个Fragment

@Override
    public int getItemPosition(Object object) {
        if (object instanceof WorkSubFirstFragment) {
            if (list0.size()==0)return super.getItemPosition(object);
            ((WorkSubFirstFragment) object).updateView(list0);
        } else if (object instanceof WorkSubFirstFragment1) {
            if (list1.size()==0)return super.getItemPosition(object);
            ((WorkSubFirstFragment1) object).updateView(list1);
        } else if (object instanceof WorkSubFirstFragment2) {
            if (list2.size()==0)return super.getItemPosition(object);
            ((WorkSubFirstFragment2) object).updateView(list2);
        }
        return super.getItemPosition(object);
    }

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@Override

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    public int getItemPosition(Object object) {

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        if (object instanceof WorkSubFirstFragment) {

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            if (list0.size()==0)return super.getItemPosition(object);

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            ((WorkSubFirstFragment) object).updateView(list0);

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        } else if (object instanceof WorkSubFirstFragment1) {

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            if (list1.size()==0)return super.getItemPosition(object);

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            ((WorkSubFirstFragment1) object).updateView(list1);

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        } else if (object instanceof WorkSubFirstFragment2) {

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            if (list2.size()==0)return super.getItemPosition(object);

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            ((WorkSubFirstFragment2) object).updateView(list2);

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        }

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        return super.getItemPosition(object);

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    }

4.定义Fragment中的更新视图方法:

public void updateView(List<WorkOrderBean.RowsBean> rows) {
        reflashSelfData(rows);
}

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public void updateView(List<WorkOrderBean.RowsBean> rows) {

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        reflashSelfData(rows);

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}

小贴士:

    添加数据时不要直接赋值,采用addList()方法最好,并且之前最好清空数据集

list0.clear();
list0.addAll(list);

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list0.clear();

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list0.addAll(list);