Java 如何在列表视图中为特定事件单击按钮时更改颜色，并在关闭按钮并返回按钮时保持按钮颜色
我在这里添加了我的invitationevent片段代码，我想在listview中单击特定事件的特定按钮时更改按钮的颜色Java 如何在列表视图中为特定事件单击按钮时更改颜色，并在关闭按钮并返回按钮时保持按钮颜色,java,android,Java,Android,我在这里添加了我的invitationevent片段代码，我想在listview中单击特定事件的特定按钮时更改按钮的颜色 public class InvitationFragment extends Fragment { LayoutInflater inflater; ViewGroup container; Bundle savedInstanceState; private List<String> event
public class InvitationFragment extends Fragment {
LayoutInflater inflater;
ViewGroup container;
Bundle savedInstanceState;
private List<String> eventName = new ArrayList<>();
private List<Long> eventId = new ArrayList<>();
private List<String> eventPlace = new ArrayList<>();
private List<EventMO> eventMOs = new ArrayList<>();
private List<Long> eventUserId = new ArrayList<>();
private Context context;
private UserOccasions userOccasions;
private UserDelegate userDelegate = new UserDelegate();
private EventDelegates eventDelegates = new EventDelegates();
private Gson gson = new Gson();
private ProgressDialog prgDialog;
private UserMO userMO;
private CheckBox invitationCheckBox;
private ListView occasionView;
private DatabaseHelper dbHelper;
private View view;
private SharedPreferences sharedpreferences;
public boolean onOptionsItemSelected(MenuItem item) {
Log.d("onOptionsItemSelected", "yes");
switch (item.getItemId()) {
case R.id.menu_cancel_event:
displayInvitationList();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void displayInvitationList() {
int itemCount = occasionView.getCheckedItemCount();
for (int i = 1; i <= itemCount; i++) {
if (userOccasions.getCheckedInvitationCount() != null) {
SQLiteDatabase db = dbHelper.getWritableDatabase();
// eventUserId = userOccasions.getCheckedInvitationCount();
// db.delete("user_relation", "EVENT_USER_ID" + " = ?", new String[]{Long.toString(eventUserId)});
db.close();
}
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle
savedInstanceState) {
this.inflater = inflater;
this.container = container;
this.savedInstanceState = savedInstanceState;
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
final View view = inflater.inflate(R.layout.invitation_tab, container, false);
context = getActivity().getApplicationContext();
prgDialog = new ProgressDialog(getActivity());
eventId.clear();
eventName.clear();
eventPlace.clear();
// Set Progress Dialog Text
prgDialog.setMessage("Please wait...");
// Set Cancelable as False
prgDialog.setCancelable(false);
prgDialog.show();
DatabaseHelper dbHelper = new DatabaseHelper(context);
userMO = dbHelper.getRingeeUserData(1);
new AsyncTask<Void, Void, String>() {
@Override
protected String doInBackground(Void... arg0) {
return eventDelegates.getAllEventForUser(userMO, context);
}
@Override
protected void onPostExecute(String eventLists) {
if (eventLists != "null") {
eventMOs = gson.fromJson(eventLists, new TypeToken<List<EventMO>>() {
}.getType());
Toast.makeText(context, "total items of eventMo" + eventMOs.size(), Toast.LENGTH_LONG).show();
for (EventMO eventMO : eventMOs) {
eventName.add(eventMO.getText());
eventId.add(eventMO.getEventId());
eventPlace.add(eventMO.getPlace());
}
DatabaseHelper dbHelper = new DatabaseHelper(context);
//long totalInsertion = dbHelper.insertUserRelationTable(userMOs);
prgDialog.dismiss();
//Toast.makeText(context, "total userMos size " + userMOs.size() + "total db insertion size " + totalInsertion, Toast.LENGTH_LONG).show();
occasionView = (ListView) view.findViewById(R.id.invitation_list_view);
userOccasions = new UserOccasions();
occasionView.setAdapter(userOccasions);
occasionView.setItemsCanFocus(false);
occasionView.setTextFilterEnabled(true);
occasionView.setOnItemClickListener(occasionView.getOnItemClickListener());
}
}
}.execute(null, null, null);
return view;
}
private class UserOccasions extends BaseAdapter {
LayoutInflater mInflater;
TextView eventNameTxtV, eventPlaceTxtV;
private ArrayList<EventMO> checkedInvitationItems;
private Object invitationTag;
UserOccasions() {
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.checkedInvitationItems = new ArrayList<EventMO>();
}
@Override
public int getCount() {
return eventMOs.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return 0;
}
// show list values name and mobile number in contact page
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if (null == convertView) {
convertView = mInflater.inflate(R.layout.invitation, null);
}
eventNameTxtV = (TextView) convertView.findViewById(R.id.invitationTitle);
eventPlaceTxtV = (TextView) convertView.findViewById(R.id.invitationPlace);
eventNameTxtV.setText(eventMOs.get(position).getText());
eventPlaceTxtV.setText(eventMOs.get(position).getPlace());
// intializing variables
final EventMO eventMO = eventMOs.get(position);
convertView.setTag(position);
View v = convertView.findViewById(R.id.invitation_single);
final LinearLayout eventLayout = (LinearLayout) convertView.findViewById(R.id.invitation_single);
invitationCheckBox = (CheckBox) convertView.findViewById(R.id.invitationCheckBox);
Button yesBtn = (Button) convertView.findViewById(R.id.yesButton);
Button noBtn = (Button) convertView.findViewById(R.id.noButton);
Button maybeBtn = (Button) convertView.findViewById(R.id.buttonMayBe);
final LinearLayout responseLayout = (LinearLayout) convertView.findViewById(R.id.hidden);
invitationCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
checkedInvitationItems.add((EventMO) eventMO);
} else {
checkedInvitationItems.remove((EventMO) eventMO);
}
}
});
//Based on the user click, response will be stored
yesBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
responseLayout.setVisibility(View.GONE);
//If user clicks yes button in invitation response layout,response would be stored as 1 for event user
final int response = 1;
final long eventId = eventMOs.get(position).getEventId();
userMO.setIsAttending(response);
new AsyncTask<Void, Void, String>() {
protected String doInBackground(Void... arg0) {
return userDelegate.updateEventUserRelationShipMapping(userMO, eventId);
}
}.execute(null, null, null);
}
});
noBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
responseLayout.setVisibility(View.GONE);
//If user clicks no button in invitation response layout,response would be stored as 0 for event user
final int response = 0;
final long eventId = eventMOs.get(position).getEventId();
userMO.setIsAttending(response);
new AsyncTask<Void, Void, String>() {
protected String doInBackground(Void... arg0) {
return userDelegate.updateEventUserRelationShipMapping(userMO, eventId);
}
}.execute(null, null, null);
}
});
maybeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
responseLayout.setVisibility(View.GONE);
//If user clicks maybe button in invitation response layout,response would be stored as for event user
final int response = 2;
userMO.setIsAttending(response);
final long eventId = eventMOs.get(position).getEventId();
new AsyncTask<Void, Void, String>() {
protected String doInBackground(Void... arg0) {
return userDelegate.updateEventUserRelationShipMapping(userMO, eventId);
}
}.execute(null, null, null);
}
});
eventLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.invitation_single:
responseLayout.setVisibility(View.VISIBLE);
break;
}
}
});
return convertView;
}
public ArrayList<EventMO> getCheckedInvitationCount() {
return this.checkedInvitationItems;
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:color="#000000" /> <!-- pressed -->
<item android:state_focused="true"
android:color="#000000" /> <!-- focused -->
<item android:color="#FFFFFF" /> <!-- default -->
</selector>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="you text"
android:textColor="@color/button_dark_text" />
谢谢你的回复，我会试试这个，稍后告诉你它是否有效，我想创建颜色，因为我已经有color.xml的值了。在这里，我们只定义了颜色名称。我的问题是，当我返回并返回此按钮时，它显示为正常颜色，而不是更改共享首选项中按钮的状态。您能告诉我如何使用共享首选项吗？因为我是安卓新手。这里是了解共享首选项的链接-
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:color="#000000" /> <!-- pressed -->
<item android:state_focused="true"
android:color="#000000" /> <!-- focused -->
<item android:color="#FFFFFF" /> <!-- default -->
</selector>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="you text"
android:textColor="@color/button_dark_text" />