如何更改搜索文字的背景色在列表视图，CursorAdapter的，而在搜索查看打字？ [英] How to change background color of searched text in listview-cursoradapter while typing in searchview?
问题描述
我见过关于列表视图使用 Spannable 字符串高亮显示文本教程，但有没有来自文本搜索数据库和突出列表视图。
我有一个列表视图从数据库/光标获取数据，并与<$ C $的帮助显示C>的CursorAdapter 。我已经放在搜索查看在操作栏来从数据库表中搜索文本。
现在我想，当我键入搜索查看一个字符或单词，从数据库表每个匹配的结果应该突出 TextView中的/更改背景颜色在列表视图。
我搞不清在哪里执行搜索操作（活动或的CursorAdapter ），以及如何显示结果？
这code在活动，我可以从数据库中包含查询结果得到
@覆盖
公共布尔onCreateOptionsMenu（菜单菜单）{ 。getMenuInflater（）膨胀（R.menu.search_menu，菜单）; SearchManager的SearchManager的=（SearchManager的）getSystemService（Context.SEARCH_SERVICE）;
搜索查看搜索查看=（搜索查看）menu.findItem（R.id.action_search）
.getActionView（）;
searchView.setSearchableInfo（SearchManager的
.getSearchableInfo（getComponentName（）））;
searchView.setOnQueryTextListener（本）;
返回true;
}@覆盖
公共布尔onQueryTextChange（字符串文本）{ SEARCHTEXT（文字+*）;
返回false;
}@覆盖
公共布尔onQueryTextSubmit（字符串文本）{ SEARCHTEXT（文字+*）;
返回false;
}私人无效SEARCHTEXT（字符串文本）{ 如果（文字！= NULL）{ localDB.openDB（）;
光标光标= localDB.searchDBText（文本）;
如果（光标=空＆放大器;！＆放大器; cursor.moveToFirst（））{ 字符串消息= cursor.getString（光标
.getColumnIndex（LocalStoreDB.ROW_MESSAGE））; Log.i（SEARCHTEXT消息：，邮件）;
}其他{ Log.i（SEARCHTEXT消息：，光标是空）;
}
cursor.close（）;
localDB.closeDB（）;
}其他{ Log.i（SEARCHTEXT消息：，输入文本为空）;
}
}
道歉了一会儿后回答，但还是会帮助别人需要的人。
我最终什么事做的是通过文本适配器的方法，那么找到文本bindView（）与模式匹配器，并强调与 SpannableString
以下是适配器code：
公共类AdapterSingleChat扩展的CursorAdapter { 私有静态诠释indexThumb; //要搜索的字符串和突出
字符串textToSearch = NULL; 公共AdapterSingleChat（上下文的背景下，光标光标，INT标志）{
超（上下文，光标，标志）; //缓存列索引
indexThumb = cursor.getColumnIndex（SQLiteStoreDB.ROW_TEXT）;
} // ViewHolder（）... // NewView的（）...... @覆盖
公共无效bindView（查看视图，上下文的背景下，光标光标）{ //从游标文本中搜索将执行
字符串cursorText = cursor.getString（indexText）; // Spannable字符串匹配突出词搜索
SpannableString spannableStringSearch = NULL; 如果（（textToSearch = NULL）及！＆安培;！（textToSearch.isEmpty（）））{
spannableStringSearch =新SpannableString（cursorText）; //编译输入文本的模式
模式模式= Pattern.compile（textToSearch，
Pattern.CASE_INSENSITIVE）; //给compliled模式匹配器发现光标文字匹配模式
匹配匹配= pattern.matcher（cursorText）;
spannableStringSearch.setSpan（新BackgroundColorSpan（
Color.TRANSPARENT），0，spannableStringSearch.length（），
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE）;
而（matcher.find（））{ //突出光标所有匹配的单词，白色背景（因为我有一个创辉背景图片）
spannableStringSearch.setSpan（新BackgroundColorSpan（
Color.WHITE），matcher.start（），matcher.end（），
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE）;
}
} 如果（spannableStringSearch！= NULL { //如果搜索已经进行设置的TextView spannable串
holder.tvCursorText.setText（spannableStringSearch）;
}其他{ //否则设置纯文本光标
holder.tvCursorText.setText（cursorText）;
}
} //把文本从活动（从SearchManager的，EditText上或任何其他输入型）在这里
私人无效SEARCHTEXT（字符串文本）{ this.textToSearch =文本;
}
是的，不要忘了 swapCursor（）或 notifyDataSetChanged（）后输入文字。
I've seen tutorials about highlighting text in listview using Spannable string but there is none about searching text from database and highlighting in listview.
I have a listview which gets data from database/cursor and shows with the help of cursoradapter. I've placed searchview in action bar to search text from database table.
Now i want that when i type a character or word in searchview, every matched result from database table should highlight/change background color of textview in listview.
I'm confuse about where to perform search operation(in activity or cursoradapter) and how to display result ?
This code is in activity and i can get result from db with like query.
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.search_menu, menu);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
.getActionView();
searchView.setSearchableInfo(searchManager
.getSearchableInfo(getComponentName()));
searchView.setOnQueryTextListener(this);
return true;
}
@Override
public boolean onQueryTextChange(String text) {
searchText(text + "*");
return false;
}
@Override
public boolean onQueryTextSubmit(String text) {
searchText(text + "*");
return false;
}
private void searchText(String text) {
if (text != null) {
localDB.openDB();
Cursor cursor = localDB.searchDBText(text);
if (cursor != null && cursor.moveToFirst()) {
String message = cursor.getString(cursor
.getColumnIndex(LocalStoreDB.ROW_MESSAGE));
Log.i("searchText message:", message);
} else {
Log.i("searchText message:", "cursor is null");
}
cursor.close();
localDB.closeDB();
} else {
Log.i("searchText message:", "input text is null");
}
}
Apologize for answering after a while, but still it would help someone in need.
What i end up doing is pass the text to a method in adapter, then find the text in bindView() with Pattern-Matcher and highlight the text with SpannableString
Following is the code in adapter:
public class AdapterSingleChat extends CursorAdapter {
private static int indexThumb;
//String to search and highlight
String textToSearch = null;
public AdapterSingleChat(Context context, Cursor cursor, int flags) {
super(context, cursor, flags);
//caching the column index
indexThumb = cursor.getColumnIndex(SQLiteStoreDB.ROW_TEXT);
}
//ViewHolder()...
//newView()....
@Override
public void bindView(View view, Context context, Cursor cursor){
//Text from cursor in which search will perform
String cursorText = cursor.getString(indexText);
//Spannable string to highlight matching searched words
SpannableString spannableStringSearch = null;
if ((textToSearch != null) && (!textToSearch.isEmpty())) {
spannableStringSearch = new SpannableString(cursorText);
//compile the pattern of input text
Pattern pattern = Pattern.compile(textToSearch,
Pattern.CASE_INSENSITIVE);
//giving the compliled pattern to matcher to find matching pattern in cursor text
Matcher matcher = pattern.matcher(cursorText);
spannableStringSearch.setSpan(new BackgroundColorSpan(
Color.TRANSPARENT), 0, spannableStringSearch.length(),
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
while (matcher.find()) {
//highlight all matching words in cursor with white background(since i have a colorfull background image)
spannableStringSearch.setSpan(new BackgroundColorSpan(
Color.WHITE), matcher.start(), matcher.end(),
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
if(spannableStringSearch != null{
//if search has performed set spannable string in textview
holder.tvCursorText.setText(spannableStringSearch);
}else{
//else set plain cursor text
holder.tvCursorText.setText(cursorText);
}
}
//Pass the text from activity(from SearchManager, EditText or any other input type) here
private void searchText(String text) {
this.textToSearch = text;
}
and yes, do not forget to swapCursor() or notifyDataSetChanged() after inputting words.
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