在 listView 中带有复选框的自定义布局:当我删除一行时，如果它被选中(checkBox = true)下一行得到检查 [英] Custom layout with checkbox in listView: When I delete a line if it was checked(checkBox = true) the next line gets the check
本文介绍了在 listView 中带有复选框的自定义布局:当我删除一行时，如果它被选中(checkBox = true)下一行得到检查的处理方法，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
当我删除一行时，如果它被checked(checkBox = true) 下一行得到检查.
When I delete a line if it was checked(checkBox = true) the next line gets the check.
我有几行，第二行检查第三行没有检查.我删除了第二行，然后第三行(现在是第二行)被选中......我不想在删除后检查它.
I have few lines, second line checked third NOT checked. I delete second line, and then the third(which is now the second) becomes checked... I dont want it to be checked after delete.
我在 onContextItemSelected() 中的活动代码中删除.
I delete in Activity code in onContextItemSelected().
适配器代码:
public class TodoAdapter2 extends ArrayAdapter<TodoTask>{
Context context;
int layoutResourceId;
ArrayList<TodoTask> data = null;
public TodoAdapter2(Context context, int layoutResourceId, ArrayList<TodoTask> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View localView = convertView;
todoHolder tempholder = new todoHolder();
if(localView == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
localView = inflater.inflate(layoutResourceId, parent, false);
tempholder.task = (TextView) localView.findViewById(R.id.txtTodoTitle);
tempholder.date = (TextView) localView.findViewById(R.id.txtTodoDueDate);
tempholder.status = (CheckBox) localView.findViewById(R.id.toDoChecked);
localView.setTag(tempholder);
}
else
{
tempholder = (todoHolder) localView.getTag();
}
final todoHolder holder = tempholder;
final TodoTask currentTask = data.get(position);
final CheckBox status = (CheckBox) holder.status;
status.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
changeColorOnCheckBox(holder, status, currentTask);
}
});
if(!holder.status.isChecked()){
if(isOverdue(currentTask)){
holder.task.setTextColor(Color.RED);
holder.date.setTextColor(Color.RED);
}
else{
holder.task.setTextColor(Color.BLACK);
holder.date.setTextColor(Color.BLACK);
}
}
holder.task.setText(currentTask.getTask());
holder.date.setText(currentTask.toStringDate());
return localView;
}
private static boolean isOverdue(TodoTask task){
int currentDay = Calendar.getInstance().get(Calendar.DAY_OF_MONTH);
int currentMonth = Calendar.getInstance().get(Calendar.MONTH)+1;
int currentYear = Calendar.getInstance().get(Calendar.YEAR);
if(task.getYear() < currentYear || task.getMonth() < currentMonth || task.getDay() < currentDay)
return true;
return false;
}
private static void changeColorOnCheckBox(todoHolder holder, CheckBox cb, TodoTask newTask){
if (cb.isChecked()) {
holder.task.setTextColor(Color.GREEN);
holder.date.setTextColor(Color.GREEN);
}
else{
if(isOverdue(newTask)){
holder.task.setTextColor(Color.RED);
holder.date.setTextColor(Color.RED);
}
else{
holder.task.setTextColor(Color.BLACK);
holder.date.setTextColor(Color.BLACK);
}
}
}
class todoHolder{
CheckBox status;
TextView task;
TextView date;
}
}
活动代码:
public class TodoListManagerActivity extends Activity {
private ArrayList<TodoTask> tasks;
private ListView list;
TodoAdapter2 ad;
final int BROWSER_ACTIVATION_REQUEST = 2; // request code
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
tasks = new ArrayList<TodoTask>();
setContentView(R.layout.activity_todo_list_manager);
list = (ListView) findViewById(R.id.lstTodoItems);
ad = new TodoAdapter2(this, R.layout.todoline_layout, tasks);
list.setAdapter(ad);
registerForContextMenu(list);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//Inflate the menu. this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.todo_list_manager_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
//What happens when we click the menu.
super.onOptionsItemSelected(item);
if(item.getItemId() == R.id.menuItemAdd){
Intent intent = new Intent(this, AddNewTodoItemActivity.class);
startActivityForResult(intent, BROWSER_ACTIVATION_REQUEST);
}
if(item.getItemId() == R.id.menuAbout){
Toast.makeText(getApplicationContext(), "Made by Andrey Dobrikov", Toast.LENGTH_SHORT).show();
}
if(item.getItemId() == R.id.exitMenu){
finish();
}
return true;
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
int pos = info.position;
TodoTask curTask = tasks.get(pos);
String title = curTask.getTask();
menu.setHeaderTitle(title); //set title for delete menu.
MenuInflater inflater = getMenuInflater();
if(firstWordCall(title) != -1){
inflater.inflate(R.menu.context_delete_call, menu);
MenuItem mi =(MenuItem) menu.findItem(R.id.menuItemCall);
mi.setTitle(title);
}
else{
inflater.inflate(R.menu.context_delete, menu);
}
}
private int firstWordCall(String title) {
String[] split = title.split(" ",2);
String firstWord = split[0].toLowerCase();
if(firstWord.equals("call")){
String rest = split[1];
rest = rest.replaceAll("\\s","");
if(rest.startsWith("-")) return -1;
rest = rest.replaceAll("-", "");
if(rest.matches("^[0-9]+")){
return Integer.parseInt(rest);
}
}
return -1;
}
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
int id = info.position;
if(item.getItemId() == R.id.menuItemDelete){
String itemToDelete = tasks.get(id).getTask();
tasks.remove(id);
ad.notifyDataSetChanged();
Toast.makeText(getApplicationContext(), "Item: [" + itemToDelete + "] was successfully deleted!", Toast.LENGTH_SHORT).show();
}
if(item.getItemId() == R.id.menuItemCall){
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + tasks.get(id).getNumber()));
startActivity(callIntent);
}
return super.onContextItemSelected(item);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent input) {
// if the results is coming from BROWSER_ACTIVATION_REQUEST
String newTask;
int number = -1;
if (requestCode == BROWSER_ACTIVATION_REQUEST) {
// check the result code set by the activity
if (resultCode == RESULT_OK) {
if(input.hasExtra("Task") && input.getExtras().getString("Task") != null){
newTask = input.getExtras().getString("Task");
int day = input.getExtras().getInt("Day");
int month = input.getExtras().getInt("Month");
int year = input.getExtras().getInt("Year");
if(newTask.toLowerCase().contains("call")){
number = firstWordCall(newTask);
}
TodoTask todoLine = new TodoTask(day, month, year, newTask, number);
newTask += day;
newTask += month;
newTask += year;
tasks.add(todoLine);
ad.notifyDataSetChanged();
}
}
}
}
@Override
protected void onResume() {
super.onResume();
}
}
推荐答案
经过更多调查我发现了问题:
After some more investigation i found the problem:
在我的适配器代码中:此代码需要更改:
In my adapter code: This code need to be changed:
final TodoTask currentTask = data.get(position);
final CheckBox status = (CheckBox) holder.status;
status.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
changeColorOnCheckBox(holder, status, currentTask);
}
});
此代码:
final TodoTask currentTask = data.get(position);
final CheckBox status = (CheckBox) holder.status;
status.setChecked(currentTask.isChecked());
status.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
changeColorOnCheckBox(holder, status, currentTask);
if(status.isChecked()){
Log.w("----------", "CheckboxT");
currentTask.setChecked(true);
}
else{
Log.w("----------", "CheckboxF");
currentTask.setChecked(false);
}
}
});
这将更新被按下的实际行的复选框.
This will update the actual line's check box that is being pressed.
非常感谢所有试图提供帮助的人！非常感谢！
Big thanks for all who was trying to help! Very appreciated!
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