一个简单好用的二级选项列表弹出框demo

年后第一篇笔记，还是听听过年歌吧

效果

用法

1.首先要准备好要填充的一级列表的的数据和对应的二级列表数据

demo一级列表一共是三个选项

所以会有三个子选项的选项集合

代码语言：javascript复制

ParentList = new ArrayList<>();
for (CharSequence ss : getResources().getTextArray(R.array.parent_item)){
    ParentList.add((String)ss);
}
ArrayList<String> childLists1 = new ArrayList<>();
for (CharSequence ss : getResources().getTextArray(R.array.child_1)){
    childLists1.add((String)ss);
}
ArrayList<String> childLists2 = new ArrayList<>();
for (CharSequence ss : getResources().getTextArray(R.array.child_2)){
    childLists2.add((String)ss);
}
ArrayList<String> childLists3 = new ArrayList<>();
for (CharSequence ss : getResources().getTextArray(R.array.child_3)){
    childLists3.add((String)ss);
}
ChildLists = new ArrayList<>();
ChildLists.add(childLists1);
ChildLists.add(childLists2);
ChildLists.add(childLists3);

2.把准备好的一级二级数据传入adapter

代码语言：javascript复制

...
mExpandableListView = dialogView.findViewById(R.id.expandablelistview);
final MultistageAdapter moAdapter = new MultistageAdapter(this,ParentList, ChildLists, mParentmValue, mChildValue);
mExpandableListView.setAdapter(moAdapter);
...

3.监听点击事件

代码语言：javascript复制

//一级选项点击回调
mExpandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
    @Override
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
        mParentmValue2 =  groupPosition;
        mChildValue2 = 0;
        moAdapter.notifyDataSetChanged(mParentmValue2,mChildValue2); //更新选中状态
        return false;
    }
});
//二级选项点击回调
mExpandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
    @Override
    public boolean onChildClick(ExpandableListView parent, View v, int reverseTypePosition, int reverseCisPosition, long id) {
        mParentmValue2 =  reverseTypePosition;
        mChildValue2 =  reverseCisPosition;
        moAdapter.notifyDataSetChanged(mParentmValue2,mChildValue2);//更新选中状态
        return false;
    }
});

4.确认框中处理

代码语言：javascript复制

private void showConfirmDialog(){
    final AlertDialog.Builder normalDialog = new AlertDialog.Builder(this);
    final String value = ParentList.get(mParentmValue2) "/" ChildLists.get(mParentmValue2).get(mChildValue);
    normalDialog.setTitle(value);
    normalDialog.setPositiveButton("OK",
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    mParentmValue =  mParentmValue2;
                    mChildValue =  mChildValue2;
                    Toast.makeText(getApplicationContext(),value,Toast.LENGTH_SHORT).show();
                }
            });
    ...
    normalDialog.show();
}

adapter 笔记 集合 事件 数据

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