在我的应用程序中，我使用 SimpleCursorAdapter。如果是 CheckBox.isChecked()，那么文本应该是删除线。但是为什么第一行总是被划掉，即使 CheckBox 没有被选中
public class MainActivity extends Activity {
// Button btnCalendar;
//*******************************************8
String[] names = {"Иван", "Марья", "Петр", "Антон", "Даша", "Борис",
"Костя", "Игорь", "Анна", "Денис", "Андрей"};
//Button buttonAddTask;
final String Tag="States";
final String Ten = "Ten";
TextView txtDataTaskToday;
String id_for_listtsk_today;
ListView lvMain_today;
String[] arr_date;
SharedPreferences sPref;
static Cursor c;
private ListView listView = null;
SQLiteDatabase db;
//public static String id_for_listtsk_today;
// static SQLiteDatabase db;
MySqlCursorAdapter adapter = null;
//***********************************************8
@Override
protected void onCreate(Bundle savedInstanceState) {
if (getIntent().getBooleanExtra("finish", false)) finish();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// btnCalendar = (Button) findViewById(R.id.btnActTwo);
// btnCalendar.setOnClickListener(this);
//*********************************************
// переменные для query
String[] columns = null;
String selection = null;
String[] selectionArgs = null;
String groupBy = null;
String having = null;
String orderBy = null;
//*********работа с БД****************
// создаем объект для данных
txtDataTaskToday = (TextView) findViewById(R.id.txtDataTaskToday);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String id_for_listtsk_today = sdf.format(new Date());
//final String b = id_for_listtsk_today;
txtDataTaskToday.setText("Today: "+id_for_listtsk_today.toString());
// txtDataTaskToday.setPaintFlags(txtDataTaskToday.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
Log.d(Tag, "id_for_listtsk_today ="+id_for_listtsk_today );
ContentValues cv = new ContentValues();
DBHelper dbHelper = new DBHelper(this);
final SQLiteDatabase db = dbHelper.getWritableDatabase();
columns = new String[] {"name"};
selection = "data_id = ?";
selectionArgs = new String[] {id_for_listtsk_today};
//c = db.query("mytable", columns, selection, selectionArgs, null, null, null);
try {
c=dbHelper.getCursor(id_for_listtsk_today);
} catch (SQLException sqle) {
Log.d(Tag, "неудача");
throw sqle;
}
String[] arr_date = logCursor(c);
//*********работа с БД****************
lvMain_today = (ListView) findViewById(R.id.list);
// lvMain_today.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
//this.listView=getl
//listView = MainActivity.this.getlgetListView();
lvMain_today.setItemsCanFocus(false);
lvMain_today.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
//ArrayAdapter<String> adapter = new ArrayAdapter<String> (this,android.R.layout.simple_list_item_multiple_choice, arr_date);// R.layout.item, my_list_item
startManagingCursor(c);
int[] listFields = new int[] { R.id.txtTitle, R.id.txtDataTaskToday };
String[] dbColumns = new String[] { DBHelper.COLUMN_NAME, DBHelper.COLUMN_TASK };
Log.d(Tag, "трассировка" );
MainActivity.this.adapter = new MySqlCursorAdapter(
this, R.layout.my_list_item,
c, dbColumns, listFields,
dbHelper);
//
lvMain_today.setAdapter(MainActivity.this.adapter);
// setListAdapter(MainActivity.this.adapter);
names = arr_date;
//c.close();
//db.close();
//dbHelper.close();
lvMain_today.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
TextView txtView = (TextView) findViewById(R.id.txtTitle);
txtView.setText("blah blah blah");
Log.d(Tag, "position="+position);
// ((TextView) txtDataTaskToday).setTextColor(android.R.color.white);
SparseBooleanArray chosen = ((ListView) parent).getCheckedItemPositions();
for (int i = 0; i < chosen.size(); i++) {
int key = chosen.keyAt(i);
if (chosen.get(key))
Log.d(Tag, "выделены ====="+names[key]);
Log.d(Tag, "itemClick: position = " + position + ", id = "
+ id);}
//****************nen пробная фигня**************
// String[] columns = null;
// String selection = null;
// String[] selectionArgs = null;
// String groupBy = null;
// String having = null;
// String orderBy = null;
// columns = new String[] {"name"};
// selection = "data_id = ?";
// selectionArgs = new String[] {id_for_listtsk_today};//id_for_listtsk_today
// Cursor c = db.query("mytable", columns, selection, selectionArgs, null, null, null);
// String[] arr = logCursor(c);
//**************************************************
// String s=test();
}
});
// lvMain_today.setOnItemSelectedListener(new OnItemSelectedListener() {
// public void onItemSelected(AdapterView<?> parent, View view,
// int position, long id) {
// Log.d(Tag, "Было выделение позиции меню!!!!position = " + position + ", id = "
// + id);
// }
//
// public void onNothingSelected(AdapterView<?> parent) {
// Log.d(Tag, "itemSelect: nothing");
// }
// });
}
private String[] logCursor(Cursor c) {
// TODO Auto-generated method stub
final String Tag="States";
String[] arr_date = new String[c.getCount()];//String[] arr_date = new String[] {};
Log.d(Tag,"мы в курсоре");
if (c!=null) {
if (c.moveToFirst()) {
// Log.d(Tag,"мы в курсоре1");
String str;
int i=-1;
do {
// Log.d(Tag,"мы в курсоре2");
str="";
i=i+1;
for (String cn: c.getColumnNames()) {
str = str.concat(c.getString(c.getColumnIndex(cn)));
}
Log.d(Tag, "++++"+str);
arr_date[i]=String.valueOf(str);
} while (c.moveToNext());
}
}
return arr_date;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
menu.add(0, 1, 0, "календарь");
menu.add(0, 2, 0, "Убрать выполненные");
menu.add(0, 3, 3, "Уйти");
// menu.add(1, 4, 1, "copy");
// menu.add(1, 5, 2, "paste");
// menu.add(1, 6, 4, "exit");
return super.onCreateOptionsMenu(menu);
// getMenuInflater().inflate(R.menu.main, menu);
//return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
StringBuilder sb = new StringBuilder();
// Выведем в TextView информацию о нажатом пункте меню
// txtDataTaskToday.setText("Item Menu");
// txtDataTaskToday.setText(item.getGroupId());
txtDataTaskToday.setText("\r\n itemId: " + String.valueOf(item.getItemId()));
// txtDataTaskToday.setText("\r\n order: " + String.valueOf(item.getOrder()));
// txtDataTaskToday.setText("\r\n title: " + item.getTitle());
switch (item.getItemId()) {
case 1:
Intent intent = new Intent(this, ToDoCalendarActivity.class);
startActivity(intent);
onDestroy();
break;
case 2:
SparseBooleanArray sbArray = lvMain_today.getCheckedItemPositions();
for (int i = 0; i < sbArray.size(); i++) {
int key = sbArray.keyAt(i);
if (sbArray.get(key))
Log.d(Tag, "выделены "+names[key]);
sPref = getPreferences(MODE_PRIVATE);
Editor ed = sPref.edit();
ed.putString(Ten, "1");
ed.commit();
Log.d(Tag, "ставим константу для скрытия");
}
break;
case 3:
sPref = getPreferences(MODE_PRIVATE);
String savedText = sPref.getString(Ten, "");
Log.d(Tag, "ten= "+ savedText);
onDestroy();
//finish();
break;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onStart() {
super.onStart();
try {
MainActivity.this.onRestart();
} catch (Exception e) {
Log.d(Tag, "не получилось рестартануть");
}
Log.d(Tag, "MainActivity: onStart()");
}
@Override
protected void onResume() {
super.onResume();
Log.d(Tag, "MainActivity: onResume()");
}
protected void onDestroy() {
super.onDestroy();
// закрываем подключение при выходе
// ToDoCalendarActivity.this.finish();
Log.d(Tag, "MainActivity: onDestroy()");
finish();
// db.close();
}
@Override
protected void onPause() {
super.onPause();
//this.dbHelper.close();
Log.d(Tag, "MainActivity: onPause()");
}
@Override
protected void onStop() {
super.onStop();
Log.d(Tag, "MainActivity: onStop()");
}
@Override
protected void onRestart() {
super.onRestart();
// new SelectDataTask().execute();
Log.d(Tag, "MainActivity: onRestart()");
}
// @Override
// public void onClick(View v) {
// // TODO Auto-generated method stub
// switch (v.getId()) {
// case R.id.btnActTwo:
//
// Intent intent = new Intent(this, ToDoCalendarActivity.class);
// startActivity(intent);
// break;
// }
// }
}
MySqlCursorAdapter
public class MySqlCursorAdapter extends SimpleCursorAdapter implements OnClickListener {
final String Tag="States";
private Context context;
private DBHelper dbHelper;
private Cursor currentCursor;
TextView txtTitle;
TextView txtTitle1;
public MySqlCursorAdapter(Context context, int layout, Cursor c,
String[] from, int[] to, DBHelper dbHelper) {
super(context, layout, c, from, to);
Log.d(Tag, "трассировка1" );
this.currentCursor = c;
this.context = context;
this.dbHelper = dbHelper;
Log.d(Tag, "MySqlCursorAdapter()");
Integer b = c.getCount();
Log.d(Tag, "b="+b);
}
public View getView(int pos, View inView, ViewGroup parent) {
Log.d(Tag, "getView() + posss=" + pos);
View v = inView;
if (v == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.my_list_item, null);
}
this.currentCursor.moveToPosition(pos);
CheckBox cBox = (CheckBox) v.findViewById(R.id.bcheck);
cBox.setTag(Integer.parseInt(this.currentCursor.getString(this.currentCursor.getColumnIndex(DBHelper.COLUMN_ID))));
Log.d(Tag, "tag="+cBox.getTag().toString());
if (this.currentCursor.getString(this.currentCursor
.getColumnIndex(DBHelper.COLUMN_STATUS)) != null
&& Integer.parseInt(this.currentCursor
.getString(this.currentCursor
.getColumnIndex(DBHelper.COLUMN_STATUS))) != 0) {
cBox.setChecked(true);
} else {
cBox.setChecked(false);
}
cBox.setOnClickListener(this);
txtTitle = (TextView) v.findViewById(R.id.txtTitle);
txtTitle1 = (TextView) v.findViewById(R.id.txtDataTaskToday);
txtTitle.setText(this.currentCursor.getString(this.currentCursor.getColumnIndex(DBHelper.COLUMN_NAME)));
txtTitle1.setText(this.currentCursor.getString(this.currentCursor.getColumnIndex(DBHelper.COLUMN_TASK)));
if (cBox.isChecked()) {
Log.d(Tag, " pos=" + pos);
txtTitle.setPaintFlags(txtTitle.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
txtTitle1.setPaintFlags(txtTitle.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
}
return (v);
}
public void ClearSelections() {
Log.d(Tag, "ClearSelections()");
this.dbHelper.clearSelections();
this.currentCursor.requery();
}
@Override
public void onClick(View v) {
if(dbHelper.dbSqlite==null) {
//Log.d(Tag, "00000000000");
SQLiteDatabase db = dbHelper.getWritableDatabase();
//Log.d(Tag, "onClick");
CheckBox cBox = (CheckBox) v;
Integer _id = (Integer) cBox.getTag();
//Integer _id = 4;
//Log.d(Tag, "Integer _id="+_id.toString());
ContentValues values = new ContentValues();
values.put(" status", cBox.isChecked() ? 1 : 0);
try {
db.update("mytable", values, "_id = ?", new String[] { Integer.toString(_id) });
} catch (SQLException sqle) {
// Log.d(Tag, "неудача");
throw sqle;
}
}
txtTitle.setTextColor(Color.BLUE);
}
}
}
我在 functoin getView() 的 textView 中放置了一个标志
txtTitle.setPaintFlags(txtTitle.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG);
txtTitle1.setPaintFlags(txtTitle.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
为什么第一行总是被划掉？
最佳答案
setPaintFlags 变化是持久的，所以我怀疑你的函数被调用了两次，第一次 cBox.setChecked(true) 被执行，但是第二次 cBox.setChecked(false) 被执行，因此标志不会被重置。因此:
if (cBox.isChecked())
{
Log.d(Tag, " pos=" + pos);
txtTitle.setPaintFlags(txtTitle.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
txtTitle1.setPaintFlags(txtTitle.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
}
else
{
Log.d(Tag, "!pos=" + pos);
txtTitle.setPaintFlags(txtTitle.getPaintFlags() & ~Paint.STRIKE_THRU_TEXT_FLAG);
txtTitle1.setPaintFlags(txtTitle.getPaintFlags() & ~Paint.STRIKE_THRU_TEXT_FLAG);
}
关于android - 为什么第一行总是被划掉？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15827562/