版權聲明:本文爲博主原創文章,未經博主允許不得轉載。 https://blog.csdn.net/huangf321123/article/details/51920056
由於本人所作的項目需要用到這種列表式的收縮與展開,因此,就好好研究了有關這方面的一些知識,當然,也借鑑了網上一些成功的案列。下面就是我模擬測試的一個展示界面。
實現上面的這些功能,我主要是通過ExpandableListView這一控件,以及BaseExpandableListAdapter適配器。這兩者關聯實現的。好的,那接下來,就對這些進行詳細的展示。
- 所有的xml佈局展示
## activity_main.xml##
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.administrator.expandablelistviewdemo1.MainActivity">
<ExpandableListView
android:id="@+id/expand_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:groupIndicator="@null"/>
</RelativeLayout>
## parent_group_item.xml##
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="10dp" >
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center_vertical"
android:text="121"/>
<TextView
android:id="@+id/kpi_score"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/title"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:text="80分"/>
<ImageView
android:id="@+id/kpi_back_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/up"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="20dp"
/>
</RelativeLayout>
## child_adapter.xml##
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp" >
<TextView
android:id="@+id/childGroupTV"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:paddingLeft="40dp" />
<ImageView
android:id="@+id/kpi_back_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/up"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="20dp"
/>
<TextView
android:id="@+id/score_value"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:gravity="center"
android:visibility="gone"
android:background="@drawable/score_bg"
android:text="10分"
android:layout_marginRight="50dp"
/>
</RelativeLayout>
</LinearLayout>
## child_child.xml##
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp" >
<TextView
android:id="@+id/childGroupTV"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:paddingLeft="60dp" />
<TextView
android:id="@+id/score_value"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:gravity="center"
android:visibility="gone"
android:background="@drawable/score_bg"
android:text="10分"
android:layout_marginRight="50dp"
/>
</RelativeLayout>
</LinearLayout>
## activity_content.xml##
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.administrator.expandablelistviewdemo1.ContentActivity">
<TextView
android:id="@+id/content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:textSize="40dp"
android:textColor="#ff0000"
/>
</RelativeLayout>
- 接下來就是獲取數據、適配數據,以及對控件的操作事件。首先是獲取數據,由於項目接口不宜公開,固這裏採用的是測試數據其主要代碼如下。
/**
* 初始化數據
*/
private void initData() {
for(int i=0;i<4;i++){
FirstBean firstBean = new FirstBean();
ArrayList<SecondBean> mArrlistSecondBean = new ArrayList<SecondBean>();
if(i==0){
firstBean.setScore("80分");
firstBean.setTitle("KPI 關鍵能力");
}else if(i==1){
firstBean.setScore("10分");
firstBean.setTitle("API 工作態度");
}else if(i==2){
firstBean.setScore("10分");
firstBean.setTitle("LPI 團隊建設");
}else if(i==3){
firstBean.setScore("5分");
firstBean.setTitle("WPI 特殊事件");
}
for(int j=0;j<3;j++){
SecondBean secondBean = new SecondBean();
secondBean.setTitle("第"+i+"個二級標題");
ArrayList<ThirdBean> mArrlistBean = new ArrayList<ThirdBean>();
for(int k=0;k<2;k++){
ThirdBean thirdBean = new ThirdBean();
thirdBean.setTitle("第"+k+"個三級標題");
mArrlistBean.add(thirdBean);
}
secondBean.setSecondBean(mArrlistBean);
mArrlistSecondBean.add(secondBean);
}
firstBean.setFirstData(mArrlistSecondBean);
mDatas.add(firstBean);
Log.e("xxx",mDatas.get(i).getTitle());
}
}
- 由於是三級菜單,所以這裏的實體用了3個,理論上,n級菜單的話,那就得n個實體,但是一般的app用到的至多就是3級,4級以上的都比較少見。其適配器那就得用兩個。接下來講解第一個適配器,它不是繼承BaseAdapter,繼承的是BaseExpandableListAdapter,通過重寫它的方法能很好的把數據與控件結合在一起。其主要的方法有:getGroupView()、getChildView()….主要代碼如下。
/**
* 第一級菜單適配器佈局
* @param parentPosition
* @param isExpanded
*
* @param convertView
* @param viewGroup
* @return
*/
@Override
public View getGroupView(int parentPosition, boolean isExpanded, View convertView, ViewGroup viewGroup) {
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(
R.layout.parent_group_item, null);
holder = new ViewHolder();
holder.upImg = (ImageView) convertView.findViewById(R.id.kpi_back_img);
holder.score = (TextView) convertView.findViewById(R.id.kpi_score);
holder.title = (TextView) convertView.findViewById(R.id.title);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
//區分箭頭往上還是
if(isExpanded){
holder.upImg.setImageResource(R.drawable.dowm);
}else{
holder.upImg.setImageResource(R.drawable.up);
}
holder.title.setText(mData.get(parentPosition).getTitle());
holder.score.setText(mData.get(parentPosition).getScore());
return convertView;
}
class ViewHolder{
private TextView title;
private TextView score;
private ImageView upImg;
}
public ExpandableListView getExpandableListView() {
ExpandableListView mExpandableListView = new ExpandableListView(
mContext);
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, (int) mContext
.getResources().getDimension(
R.dimen.parent_list_height));
mExpandableListView.setLayoutParams(lp);
mExpandableListView.setDividerHeight(0);// 取消group項的分割線
mExpandableListView.setChildDivider(null);// 取消child項的分割線
mExpandableListView.setGroupIndicator(null);// 取消展開摺疊的指示圖標
return mExpandableListView;
}
/**
* 第二級菜單式配
* @param parentPosition
* @param childPosition
* @param isExpanded
* @param view
* @param viewGroup
* @return
*/
@Override
public View getChildView(final int parentPosition, final int childPosition, boolean isExpanded, View view, ViewGroup viewGroup) {
final ExpandableListView childListView = getExpandableListView();
//獲取子菜單的數據
final ArrayList<SecondBean> childData = new ArrayList<SecondBean>();
final SecondBean bean = getChild(parentPosition,childPosition);
childData.add(bean);
ChildAdapter adapter = new ChildAdapter(mContext,childData,parentPosition);
childListView.setAdapter(adapter);
/**
* 點擊最小級菜單,調用該方法
* */
childListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView arg0, View arg1,
int groupIndex, int childIndex, long arg4) {
if(mListener != null){
mListener.onclick(parentPosition,childPosition, childIndex);
//點擊三級菜單,跳轉到編輯菜單界面
Intent intent = new Intent(mContext, ContentActivity.class);
intent.putExtra("content","你點的位置是: "+"parentPosition>>"+parentPosition+
"childPosition>>"+childPosition+"childIndex>>"+childIndex);
mContext.startActivity(intent);
}
return false;
}
});
/**
*子ExpandableListView展開時,因爲group只有一項,所以子ExpandableListView的總高度=
* (子ExpandableListView的child數量 + 1 )* 每一項的高度
* */
childListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
Log.e("xxx",groupPosition+"onGroupExpand>>");
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
(bean.getSecondBean().size() + 1)* (int) mContext
.getResources().getDimension(R.dimen.parent_list_height));
childListView.setLayoutParams(lp);
}
});
/**
*子ExpandableListView關閉時,此時只剩下group這一項,
* 所以子ExpandableListView的總高度即爲一項的高度
* */
childListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
Log.e("xxx",groupPosition+">>onGroupCollapse");
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, (int) mContext
.getResources().getDimension(R.dimen.parent_list_height));
childListView.setLayoutParams(lp);
holder.upImg.setImageResource(R.drawable.up);
}
});
/**
* 在這裏對二級菜單的點擊事件進行操作
*/
childListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int Position, long id) {
// if(isClick){
// holder.mUpImg.setImageResource(R.drawable.dowm);
// isClick = false;
// }else{
// holder.mUpImg.setImageResource(R.drawable.up);
// isClick = true;
// }
Log.e("Xxx","恭喜你,點擊了"+parentPosition+"childpos>>>"+childPosition);
return false;
}
});
return childListView;
}
第二個適配器與上述差不多,也是主要通過以上的方法來實現的。在這裏,我就不在貼出重複的的代碼了,在下面的鏈接,就可以下載源代碼。