Android中listview内的gridview的复选框 [英] Checkbox for gridview inside listview in Android
本文介绍了Android中listview内的gridview的复选框的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的预订应用程序中有一个问题声明，以便用户可以删除特定日期或所有日期的所有预订，请参见此图像:
I have a problem statement in my booking app such that user can delete all the booking of the particular date or all the dates, see this image:
我试图使用多个适配器将数据添加到网格视图中，以用于列表视图和内部网格视图，但是它正在进行数据复制.我该如何解决这个问题?
I have tried to add data to the grid view using multiple adapters for listview and the inner gridview, but it's taking data replication. How can I solve this problem?
每个日期表示带有复选框的列表视图，而UH，U1等表示gridview的项目.我想传递所选的场地ID，即. H，U！列表视图中的其他内容及其对应的日期
Each date represents the listview with checkbox,and the UH,U1 etc represents the item of gridview. I want to pass the selected venue id ie. UH,U! etc in a listview and its corresponding dates
推荐答案
尝试以下示例:)
MainActivity.java:
MainActivity.java:
public class MainActivity extends Activity {
Button clearChecks;
ExpandableListView expandableListView;
ExpandableListGridAdapter expandableListAdapter;
int lastExpandedPosition = -1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
expandableListView = findViewById(R.id.expandedListView);
clearChecks = findViewById(R.id.btnClearChecks);
List<String> listTitle = genGroupList();
expandableListAdapter = new ExpandableListGridAdapter(this, listTitle, genChildList(listTitle));
expandableListView.setAdapter(expandableListAdapter);
expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
if(lastExpandedPosition != -1 && (lastExpandedPosition != groupPosition)){
expandableListView.collapseGroup(lastExpandedPosition);
}
lastExpandedPosition = groupPosition;
}
});
clearChecks.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
expandableListAdapter.clearChecks();
}
});
}
private List<String> genGroupList(){
List<String> listGroup = new ArrayList<>();
for(int i=1; i<10; i++){
listGroup.add("Group: " + i);
}
return listGroup;
}
private Map<String, List<ChildItemSample>> genChildList(List<String> header){
Map<String, List<ChildItemSample>> listChild = new HashMap<>();
for(int i=0; i<header.size(); i++){
List<ChildItemSample> testDataList = new ArrayList<>();
int a = (int)(Math.random() * 8);
for(int j=0; j<a; j++){
ChildItemSample testItem = new ChildItemSample("Child " + (j + 1));
testDataList.add(testItem);
}
listChild.put(header.get(i), testDataList);
}
return listChild;
}
}
ChildItemSample.java:
ChildItemSample.java:
public class ChildItemSample {
private boolean checked;
private String name;
public boolean isChecked() {
return checked;
}
public void setChecked(boolean checked) {
this.checked = checked;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public ChildItemSample(){
checked = false;
name = "";
}
public ChildItemSample(String name){
checked = false;
this.name = name;
}
}
ExpandableListGridAdapter.java:
ExpandableListGridAdapter.java:
public class ExpandableListGridAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> listGroup;
private Map<String, List<ChildItemSample>> listChild;
private int checkedBoxesCount;
private boolean[] checkedGroup;
public ExpandableListGridAdapter(Context context, List<String> listGroup, Map<String,
List<ChildItemSample>> listChild) {
this.context = context;
this.listGroup = listGroup;
this.listChild = listChild;
checkedBoxesCount = 0;
checkedGroup = new boolean[listGroup.size()];
}
@Override
public int getGroupCount() {
return listGroup.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return 1;
}
@Override
public String getGroup(int groupPosition) {
return listGroup.get(groupPosition);
}
@Override
public ChildItemSample getChild(int groupPosition, int childPosition) {
return listChild.get(listGroup.get(groupPosition)).get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getGroupView(int groupPosition, boolean b, View view, ViewGroup viewGroup) {
String itemGroup = getGroup(groupPosition);
GroupViewHolder groupViewHolder;
if(view == null){
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.expanded_list_group, null);
groupViewHolder = new GroupViewHolder();
groupViewHolder.tvGroup = view.findViewById(R.id.tv_group);
groupViewHolder.cbGroup = view.findViewById(R.id.cb_group);
groupViewHolder.cbGroup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int pos = (int)view.getTag();
checkedGroup[pos] = !checkedGroup[pos];
for(ChildItemSample item : listChild.get(listGroup.get(pos))){
item.setChecked(checkedGroup[pos]);
}
notifyDataSetChanged();
}
});
view.setTag(groupViewHolder);
}else {
groupViewHolder = (GroupViewHolder)view.getTag();
}
groupViewHolder.tvGroup.setText(String.format("%s (%d)", itemGroup, listChild.get(listGroup.get(groupPosition)).size()));
if(checkedGroup[groupPosition]) groupViewHolder.cbGroup.setChecked(true);
else groupViewHolder.cbGroup.setChecked(false);
groupViewHolder.cbGroup.setTag(groupPosition);
return view;
}
@Override
public View getChildView(final int groupPosition, int childPosition, boolean b, View view, ViewGroup viewGroup) {
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.list_grid_item, null);
GridLayout childLayout = view.findViewById(R.id.layout_child);
for(int i = 0; i < listChild.get(listGroup.get(groupPosition)).size(); i++){
ChildItemSample expandedListText = getChild(groupPosition, i);
CheckBox cbChild = new CheckBox(context);
GridLayout.LayoutParams params = new GridLayout.LayoutParams();
params.width = (int)(80 * context.getResources().getDisplayMetrics().density);
cbChild.setLayoutParams(params);
cbChild.setChecked(expandedListText.isChecked());
cbChild.setText(expandedListText.getName());
cbChild.setTag(i);
childLayout.addView(cbChild);
cbChild.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
CheckBox cb = (CheckBox) view;
int pos = (int) view.getTag();;
ChildItemSample selectedItem = listChild.get(listGroup.get(groupPosition)).get(pos);
selectedItem.setChecked(cb.isChecked());
if(cb.isChecked()){
checkedBoxesCount++;
Toast.makeText(context,"Checked value is: " +
listChild.get(listGroup.get(groupPosition)).get(pos).getName(),
Toast.LENGTH_SHORT).show();
}else {
checkedBoxesCount--;
if(checkedBoxesCount == 0){
Toast.makeText(context,"nothing checked",Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(context,"unchecked",Toast.LENGTH_SHORT).show();
}
}
notifyDataSetChanged();
}
});
}
return view;
}
public void clearChecks() {
for(int i=0; i<checkedGroup.length; i++) checkedGroup[i] = false;
for(List<ChildItemSample> value : listChild.values()) {
for (ChildItemSample sample : value) {
sample.setChecked(false);
}
}
checkedBoxesCount = 0;
notifyDataSetChanged();
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
private class GroupViewHolder {
CheckBox cbGroup;
TextView tvGroup;
}
}
activity_main.xml:
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/btnClearChecks"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Clear Checks" />
<ExpandableListView
android:id="@+id/expandedListView"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ExpandableListView>
</LinearLayout>
expanded_list_group.xml:
expanded_list_group.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:descendantFocusability="blocksDescendants" >
<CheckBox
android:id="@+id/cb_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="40dp"
android:layout_gravity="center_vertical" />
<TextView
android:id="@+id/tv_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text"
android:textSize="30sp" />
</LinearLayout>
list_grid_item.xml:
list_grid_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout_child"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="60dp"
android:columnCount="3"
android:orientation="horizontal">
</GridLayout>
希望有帮助！
这篇关于Android中listview内的gridview的复选框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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