我目前有一个可扩展的列表，我希望能够搜索到。我一直在android开发者网站上关注this指南，但我坚持实际方法并展示结果。
1）我的搜索方法叫做doMySearch 2）我想搜索子数组
可扩展列表代码 包com.sammy.umass;
import android.app.ExpandableListActivity;
import android.app.SearchManager;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Gravity;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Window;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
public class DirectionsScreenActivity extends ExpandableListActivity {
ExpandableListAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.directions);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setDefaultKeyMode( DEFAULT_KEYS_SEARCH_LOCAL);
Intent intent = getIntent();
if (Intent.ACTION_SEARCH.equals(intent.getAction()))
{
String query = intent.getStringExtra(SearchManager.QUERY);
doMySearch(query);
}
// Set up our adapter
mAdapter = new MyExpandableListAdapter();
setListAdapter(mAdapter);
registerForContextMenu(getExpandableListView());
}
private void doMySearch(String query)
{
//Search Method
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
menu.setHeaderTitle("Sample menu");
menu.add(0, 0, 0, R.string.expandable_list_sample_action);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item.getMenuInfo();
String title = ((TextView) info.targetView).getText().toString();
int type = ExpandableListView.getPackedPositionType(info.packedPosition);
if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
int groupPos = ExpandableListView.getPackedPositionGroup(info.packedPosition);
int childPos = ExpandableListView.getPackedPositionChild(info.packedPosition);
Toast.makeText(this, title + ": Child " + childPos + " clicked in group " + groupPos,
Toast.LENGTH_SHORT).show();
return true;
} else if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
int groupPos = ExpandableListView.getPackedPositionGroup(info.packedPosition);
Toast.makeText(this, title + ": Group " + groupPos + " clicked", Toast.LENGTH_SHORT).show();
return true;
}
return false;
}
/**
* A simple adapter which maintains an ArrayList of photo resource Ids.
* Each photo is displayed as an image. This adapter supports clearing the
* list of photos and adding a new photo.
*
*/
public class MyExpandableListAdapter extends BaseExpandableListAdapter {
// Sample data set. children[i] contains the children (String[]) for groups[i].
private String[] groups = { " Academic", " Research & Labs", " Dining Commons", " Points of Interest"," Adminstriation",
" Central"," North Apartments"," Northeast"," Orchard Hill"," Southwest"," Sylvan"};
private String[][] children = {
//Academic Buildings
{ "Arnold House","Barlett Hall","Berkshire House","Blaisdell House","Bowditch Hall","Clark Hall","Draper Hall","Duda Hall","East Experiment Station",
"Fernal Hall","French Hall","Furcolo Hall","H. Alfond Management Center","Hampshire House","Herter Hall","Hillis House",
"Holdsworth Hall","Isenberg School Of Management","Machmer Hall","Marcus Hall","Marston Hall","Middlesex House","Montague House",
"Munson Hall","New Africa House","Skinner Hall","South College","Stockbridge/Bowker","Studio Arts Building","Thompson Hall","Tobin Hall",
"West Experiment Station"},
//Research and Labs
{ "Agricultural Engineering","Apiary Laboratory","Astronomy Building","Chenoweth Laboratory","Computer Science Building",
"Conte Polymer Research Building","Engineering Laboratory 1","Engineering Laboratory 2","Flint Laboratory","Goessmann Laboratory",
"Gunness Laboratory","Hasbrouck Laboratory","Hatch Laboratory","Integrated Science Building","Knowles Engineering Research Building",
"Lederle Graduate Reaserch Building","Morrill Science Center","Paige Laboratory","Thayer ANimal Disease Laboratory","W.E.B. Du Bois Library"},
//Dining Commons
{ "Berkshire", "Franklin","Hampden","Hampshire","Worcester" },
//Points of Interest
{ "Bowditch Lodge","Boyden Gym","Campus Center/Hotel","Curry Hicks","Durfee Conservatory","Farley Lodge","Fine Arts Center","Grinnell Arena",
"Haigis Mall","Mahar Auditorium","McGuirk Alumni Stadium","Mullins Center","Observatory","Old Chapel","Recreation Center","Student Union",
"Totman Gym","Vistor's Center"},
//Administration
{ "Army ROTC Building", "Auxiliary Services Food Store","Campus Center Parking","Chancellor's House","Cold Storage Building",
"Police Department","Forest and Parks Building","Goodell","Physical Plant","PVTA Transit Facility","Research Administration",
"Shade Tree Lab","Textbook Annex","University Health Services","Whitmore Administration"},
//Central
{ "Baker", "Brett","Butterfield","Chadbourne","Gorman","Greenough","Van Meter","Wheeler" },
//North Apartments
{ "North A", "North B","North C","North D" },
//Northeast
{ "Crabtree", "Dwight","Hamlin","Johnson","Knowlton","Leach","Lewis","Mary Lyon","Thatcher" },
//Orchard Hill
{ "Dickinson", "Field","Grayson","Webster" },
//Southwest
{ "Cance", "Coolidge","Crampton","Emerson","James","John Adams","John Quincy Admas","Kennedy","MacKimmie","Melville","Moore","Patteron",
"Pierpont","Prince","Thoreau","Washington" },
//Sylvan
{ "Brown", "Cashin","McNamara"},
};
public Object getChild(int groupPosition, int childPosition) {
return children[groupPosition][childPosition];
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public int getChildrenCount(int groupPosition) {
return children[groupPosition].length;
}
public TextView getGenericView() {
// Layout parameters for the ExpandableListView
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, 64);
TextView textView = new TextView(DirectionsScreenActivity.this);
textView.setLayoutParams(lp);
// Center the text vertically
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
// Set the text starting position
textView.setPadding(36, 0, 0, 0);
return textView;
}
public View getChildView(final int groupPosition,final int childPosition, boolean isLastChild,
View convertView, ViewGroup parent) {
TextView textView = getGenericView();
textView.setText(getChild(groupPosition, childPosition).toString());
textView.setOnClickListener(new View.OnClickListener(){
public void onClick(View view){
Uri uriToOpen = getUriForView(groupPosition, childPosition);
Intent i = new Intent(Intent.ACTION_VIEW, uriToOpen);
startActivity(i);
}
public Object getGroup(int groupPosition) {
return groups[groupPosition];
}
public int getGroupCount() {
return groups.length;
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
ViewGroup parent) {
TextView textView = getGenericView();
textView.setText(getGroup(groupPosition).toString());
return textView;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public boolean hasStableIds() {
return true;
}
}
}
答案 0 :(得分：2)
首先，您的帖子很难阅读，因为您发布了比回答问题所需的更多代码。
无论如何，children数组在BaseExpandableListAdapter中声明为私有成员变量。您没有提供任何工具来从不同的类（即DirectionsScreenActivity）访问该数组，因此您需要为DirectionsScreenActivity提供一些方法来访问该数组，然后才能对其执行任何操作。< / p>
一种方法是创建一个简单返回数组的公共（或受保护）方法，但这可能会提供太多的访问权限。
我要做的是将搜索方法移至MyExpandableListAdapter即
public [some meaningful return type] doSearch(String query)
{
// Search code
}
而不是在doMySearch()中调用DirectionsScreenActivity - 通过doSearch()的实例调用MyExpandableListAdapter（因为那已经有你的数组），并做任何你需要做的事情结果ex：
if (Intent.ACTION_SEARCH.equals(intent.getAction()))
{
String query = intent.getStringExtra(SearchManager.QUERY);
[some meaningful type] result = mAdapter.doSearch(query);
// Do something with the result
}
至于如何进行搜索，这只是标准的Java而不是Android特定的。 Java中有一百万个基本搜索算法的例子，所以我不会在这里详述它们。
作为旁注，通过使用散列String --> List<String>的Dictionary / Hashtable，您可以获得更好的性能。键将是组，值将是子列表。
这样，如果有人正在寻找所有管理建筑物，您可以在固定时间内获取管理建筑物列表（通过简单地从哈希表中检索列表[值]，使用“管理”键）。查找建筑物组的名称有点棘手，在最坏的情况下需要迭代哈希表中的所有项目。