我有一个包含群组和子节点的ExpandableListActivity。孩子们有一个复选框。 当用户点击该组时，我已覆盖了setOnGroupExpandListener。
如何检查/取消选中特定群组的每个孩子的复选框？
我已经尝试使用groupPosition获取适配器并调用getChild，但我失去了怎么做。
提前致谢
import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.widget.Button;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupCollapseListener;
import android.widget.ExpandableListView.OnGroupExpandListener;
import android.widget.Toast;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
public class ExpList extends ExpandableListActivity
{
String arrGroupelements[];
String arrChildelements[][];
private static final String TAG = ExpList.class.getSimpleName();
DisplayMetrics metrics;
int width;
ExpandableListView expList;
RROnCallApplication appObj;
Cursor companies;
Button mainMenu;
ExpAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
appObj = (RROnCallApplication) getApplication();
mainMenu = (Button)findViewById(R.id.buttonmainmenu);
mainMenu.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(ExpList.this, MenuActivity2.class);
startActivity(i);
}
});
try{
companies = appObj.dbModel.queryAllFromCompanyBranch();
arrGroupelements = new String[companies.getCount() ];
Log.e(TAG, "companies count = " + companies.getCount());
arrChildelements = new String[arrGroupelements.length][20];
if(companies != null && companies.getCount() > 0){
if(companies.moveToFirst()){
int i = 0;
do{
arrGroupelements[i] = companies.getString(companies.getColumnIndex(DBModel.C_COMPANYBRANCH_NAME));
Log.e(TAG, "arrGroupelements[" + i +"] = " + arrGroupelements[i]);
int compID = appObj.dbModel.getCompanyidFromName(arrGroupelements[i]);
Log.e(TAG, "compID = " + compID);
String[] branchesArr = appObj.dbModel.getBranchNamesfromCompanyId(compID);
Log.e(TAG, "branchesArr length = " + branchesArr.length);
for(int h = 0; h < branchesArr.length; h++){
arrChildelements[i][h] = branchesArr[h];
}
i++;
}while(companies.moveToNext());
Log.e(TAG, "arrGroupelements size = " + arrGroupelements.length);
}//end of moveToFirst
}
}catch(Exception e){
Toast.makeText(this, "There was a problem downloading companies and branches", Toast.LENGTH_LONG).show();
Log.e(TAG, "********Exception = " + e.toString());
}finally{
companies.close();
}
expList = getExpandableListView();
metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
width = metrics.widthPixels;
//this code for adjusting the group indicator into right side of the view
expList.setIndicatorBounds(width - GetDipsFromPixel(50), width - GetDipsFromPixel(10));
expList.setAdapter(new ExpAdapter(this));
expList.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
Log.e("onGroupExpand", "OK");
}
});
expList.setOnGroupCollapseListener(new OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
Log.e("onGroupCollapse", "OK");
}
});
expList.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
Log.e("OnChildClickListener", "OK Group = " + groupPosition
+ " child = " + childPosition);
TextView tvBranchName = (TextView) v.findViewById(R.id.tvPlayerName);
String branchName = tvBranchName.getText().toString();
Log.e(TAG, "branch name = " + branchName);
int branchID = appObj.dbModel.getBranchIdFromName(branchName);
Log.e(TAG, "branch ID = " + branchID);
final CheckBox cb = ((CheckBox)v.findViewById(R.id.checkbox));
if(cb.isChecked() == true){
Log.e(TAG, "checkBox is true but setting it to false now" );
cb.setChecked(false);
appObj.dbModel.updateBranchSelectedStatus(String.valueOf(branchID), "N");
Log.e(TAG, "just called updateBranchSelectedStatus with values " + String.valueOf(branchID) + " " + "N");
Log.e(TAG, "Branhes selected are " + appObj.dbModel.getBranchList());
}else{
Log.e(TAG, "checkBox is false but setting it to true");
cb.setChecked(true);
appObj.dbModel.updateBranchSelectedStatus(String.valueOf(branchID), "Y");
Log.e(TAG, "just called updateBranchSelectedStatus with values " + String.valueOf(branchID) + " " + "Y");
Log.e(TAG, "Branhes selected are " + appObj.dbModel.getBranchList());
}
return false;
}
});
}//end of onCreate
@Override
public void onBackPressed() {
super.onBackPressed();
Intent i = new Intent(this, OnCallMenuActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
public int GetDipsFromPixel(float pixels)
{
// Get the screen's density scale
final float scale = getResources().getDisplayMetrics().density;
// Convert the dps to pixels, based on density scale
return (int) (pixels * scale + 0.5f);
}
public class ExpAdapter extends BaseExpandableListAdapter {
private Context myContext;
public ExpAdapter(Context context) {
myContext = context;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return null;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.child_row, null);
}
TextView tvPlayerName = (TextView) convertView.findViewById(R.id.tvPlayerName);
tvPlayerName.setText(arrChildelements[groupPosition][childPosition]);
CheckBox cb = (CheckBox)convertView.findViewById(R.id.checkbox);
int branchID = appObj.dbModel.getBranchIdFromName(arrChildelements[groupPosition][childPosition]);
Log.e(TAG, "inside getchildView and branchID = " + branchID);
boolean isBranchSelected = appObj.dbModel.isBranchSelected(String.valueOf(branchID));
Log.e(TAG, "isBranchSelected = " + isBranchSelected);
if(isBranchSelected == true){
cb.setChecked(true);
Log.e(TAG, "inside getchildView and cb.setChecked(true)");
}else{
cb.setChecked(false);
Log.e(TAG, "inside getchildView and cb.setChecked(false)");
}
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
//return arrChildelements[groupPosition].length;
int count = 0;
for (int i = 0; i < arrChildelements[groupPosition].length; i++)
count += arrChildelements[groupPosition][i] != null ? 1 : 0;
return count;
}
@Override
public Object getGroup(int groupPosition) {
return null;
}
@Override
public int getGroupCount() {
return arrGroupelements.length;
}
@Override
public long getGroupId(int groupPosition) {
return 0;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.group_row, null);
}
TextView tvGroupName = (TextView) convertView.findViewById(R.id.tvGroupName);
tvGroupName.setText(arrGroupelements[groupPosition]);
ExpandableListView mExpandableListView = (ExpandableListView) parent;
mExpandableListView.expandGroup(groupPosition);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
}
答案 0 :(得分：0)
尝试创建一个名为checked的布尔数组。然后在getChildView中检查数组中的那个点是否为真，如果是，那么选中复选框 然后当你通过那个二维数组中的每个元素展开一个父循环时，将它们全部设置为true，然后调用notifyDataSetChanged
boolean [][] checked;
然后在展开
for(int i =0; i < checked[groupPosition].size; i++)
{
checked[groupPosition][i] = true;
}
notifyDataSetChanged();
在getChildView中你也应该这样
cb.setChecked(checked[groupPosition][childPosition]);
可以通过将其设置为false来取消选中它们。只需记住在用户检查或取消选中按钮时更新此数组，这样当列表视图被回收时，您不会随机选中复选框。