您好在下面的代码中使用ischecked我想返回我想要返回的复选框值数组。
但是如何在creategroup方法中仅传递参数的已检查值。而不是检查我必须作为参数传递哪个字符串。
GroupList.java
public class GroupList extends ListActivity
{
boolean[] checkBoxState;
boolean isChecked;
String check;
ListView users;
int position;
private IAppManager imService = null;
private FriendListAdapter friendAdapter;
public String ownusername = new String();
private class FriendListAdapter extends BaseAdapter
{
@SuppressWarnings("unused")
class ViewHolder {
TextView text;
ImageView icon;
CheckBox check1;
}
private LayoutInflater mInflater;
private Bitmap mOnlineIcon;
private Bitmap mOfflineIcon;
private FriendInfo[] friend = null;
public FriendListAdapter(Context context) {
super();
mInflater = LayoutInflater.from(context);
mOnlineIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.greenstar);
mOfflineIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.redstar);
}
public void setFriendList(FriendInfo[] friends)
{
this.friend = friends;
}
public int getCount() {
return friend.length;
}
public FriendInfo getItem(int position) {
return friend[position];
}
public long getItemId(int position) {
return 0;
}
@SuppressWarnings("unused")
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.grouplist, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.text);
holder.icon = (ImageView) convertView.findViewById(R.id.icon);
holder.check1 = (CheckBox)convertView.findViewById(R.id.checkBox1);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
holder.text.setText(friend[position].userName);
holder.icon.setImageBitmap(friend[position].status == STATUS.ONLINE ? mOnlineIcon : mOfflineIcon);
final ArrayList<String> checkedFriends = new ArrayList<String>();
checkBoxState = new boolean[friend.length];
holder.check1.setChecked(checkBoxState[position]);
holder.check1.setOnCheckedChangeListener(new OnCheckedChangeListener(){
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
checkBoxState[position]=isChecked;
if(isChecked){
check=friend[position].userName;
}
}
});
return convertView;
}
public ArrayList<FriendInfo> getCheckedItems(){
ArrayList<FriendInfo> result = new ArrayList<FriendInfo>();
if(checkBoxState!=null){
for (int i = 0; i < checkBoxState.length; i++) {
if(checkBoxState[i]){
result.add(getItem(i));
}
}
}
return result;
}
}
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
}
setContentView(R.layout.group_list_screen);
Button create=(Button)findViewById(R.id.create);
create.setOnClickListener(new OnClickListener() {
@SuppressWarnings({ "unused", "unchecked" })
@Override
public void onClick(View v) {
String groupname = getIntent().getStringExtra("nick");
try {
String result1 = imService.CreateGroup(groupname,imService.getUsername(),check);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Toast.makeText(getApplicationContext(), "Group Created Sucessfully",Toast.LENGTH_LONG).show();
}
});
friendAdapter = new FriendListAdapter(this);
friendAdapter.getCheckedItems();
}
答案 0 :(得分：1)
您可以将此方法添加到适配器：
public ArrayList<FriendInfo> getCheckedItems(){
ArrayList<FriendInfo> result = new ArrayList<FriendInfo>();
if(checkBoxState!=null){
for (int i = 0; i < checkBoxState.length; i++) {
if(checkBoxState[i]){
result.add(getItem(i));
}
}
}
return result;
}
致电：friendAdapter.getCheckedItems();
更新：
所以你的代码就是这样：
public class GroupList extends ListActivity
{
boolean[] checkBoxState;
boolean isChecked;
String check;
ListView users;
int position;
private IAppManager imService = null;
private FriendListAdapter friendAdapter;
public String ownusername = new String();
private class FriendListAdapter extends BaseAdapter
{
@SuppressWarnings("unused")
class ViewHolder {
TextView text;
ImageView icon;
CheckBox check1;
}
private LayoutInflater mInflater;
private Bitmap mOnlineIcon;
private Bitmap mOfflineIcon;
private FriendInfo[] friend = null;
public FriendListAdapter(Context context) {
super();
mInflater = LayoutInflater.from(context);
mOnlineIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.greenstar);
mOfflineIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.redstar);
}
public void setFriendList(FriendInfo[] friends)
{
this.friend = friends;
}
public int getCount() {
return friend.length;
}
public FriendInfo getItem(int position) {
return friend[position];
}
public long getItemId(int position) {
return 0;
}
@SuppressWarnings("unused")
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.grouplist, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.text);
holder.icon = (ImageView) convertView.findViewById(R.id.icon);
holder.check1 = (CheckBox)convertView.findViewById(R.id.checkBox1);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
holder.text.setText(friend[position].userName);
holder.icon.setImageBitmap(friend[position].status == STATUS.ONLINE ? mOnlineIcon : mOfflineIcon);
final ArrayList<String> checkedFriends = new ArrayList<String>();
checkBoxState = new boolean[friend.length];
holder.check1.setChecked(checkBoxState[position]);
holder.check1.setOnCheckedChangeListener(new OnCheckedChangeListener(){
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
checkBoxState[position]=isChecked;
if(isChecked){
check=friend[position].userName;
}
}
});
return convertView;
}
public ArrayList<FriendInfo> getCheckedItems(){
ArrayList<FriendInfo> result = new ArrayList<FriendInfo>();
if(checkBoxState!=null){
for (int i = 0; i < checkBoxState.length; i++) {
if(checkBoxState[i]){
result.add(getItem(i));
}
}
}
return result;
}
}
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
}
setContentView(R.layout.group_list_screen);
Button create=(Button)findViewById(R.id.create);
friendAdapter = new FriendListAdapter(this);
/*
* here you must load list items before calling
* "getCheckedItems()", I think you use "setFriendList(...)" for that
* so you need to do friendAdapter.setFriendList(YOUR_LIST). Otherwise you will have an empty array
* because there is no items, so no checked items too.
*/
friendAdapter.getCheckedItems();
create.setOnClickListener(new OnClickListener() {
@SuppressWarnings({ "unused", "unchecked" })
@Override
public void onClick(View v) {
String groupname = getIntent().getStringExtra("nick");
try {
/*
* you can also call "getCheckedItems()" here,
* to send the checkedItems to "imService"
*/
String result1 = imService.CreateGroup(groupname,imService.getUsername(),check);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Toast.makeText(getApplicationContext(), "Group Created Sucessfully",Toast.LENGTH_LONG).show();
}
});
}