好吧，我正在尝试创建一个具有listView的活动，并且可以通过操作栏搜索选项进行搜索。
如果，我使用android的默认arraylist，它只是工作正常。
但是当我尝试使用我自己的扩展baseAdapter的适配器时，它无法正常工作（无法正确搜索）。
我的总代码位于以下链接中。
有人可以帮我解决这个问题吗？
代码为::
清单::
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mysearchapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SecondActivity"
android:label="@string/title_activity_second" >
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data
android:name="android.app.searchable"
android:resource="@xml/searchable" />
</activity>
</application>
</manifest>
菜单（RES /菜单/ second.xml）::
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/action_search"
android:actionViewClass="android.widget.SearchView"
android:icon="@drawable/ic_launcher"
android:showAsAction="always"
android:title="Search"/>
</menu>
布局（RES /布局）::
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}" >
<ListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cacheColorHint="#00000000" />
</RelativeLayout>
searchable.xml（在res / xml中）::
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:hint="search..."
android:label="@string/app_name" />
自定义Adapter ::
public class ImageAdapter extends BaseAdapter implements Filterable
{
private Context context;
private ArrayList<String> originalData = null;
ArrayList<String> filteredData = null;
ValueFilter valueFilter = new ValueFilter();
public ImageAdapter(Context context, ArrayList<String> mobileValues)
{
this.context = context;
this.originalData = mobileValues;
this.filteredData = mobileValues;
}
@Override
public int getCount() {
return filteredData.size();
}
@Override
public Object getItem(int position) {
return filteredData.get(position);
}
@Override
public long getItemId(int position) {
return filteredData.indexOf(getItem(position));
}
public View getView(int position, View convertView, ViewGroup parent)
{
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View gridView;
if (convertView == null) {
gridView = new View(context);
// get layout from mobile.xml
gridView = inflater.inflate(R.layout.city_list_item, null);
// set value into textview
TextView textView = (TextView) gridView
.findViewById(R.id.grid_item_label);
textView.setText(originalData.get(position));
// set image based on selected text
// ImageView imageView = (ImageView)
// gridView.findViewById(R.id.grid_item_image);
// imageView.setImageResource(R.drawable.city_image);
} else {
gridView = (View) convertView;
}
return gridView;
}
@Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
@Override
public Filter getFilter() {
return valueFilter;
}
private class ValueFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
String filterString = constraint.toString().toUpperCase();
FilterResults results = new FilterResults();
/*
* if (constraint != null && constraint.length() > 0) {
*/
final ArrayList<String> lst = ImageAdapter.this.originalData;
int count = lst.size();
final ArrayList<String> filterList = new ArrayList<String>(count);
String filterableString;
for (int i = 0; i < count; i++) {
filterableString = lst.get(i);
if ((filterableString.toUpperCase()).contains(filterString)) {
filterList.add(filterableString);
}
}
results.count = filterList.size();
results.values = filterList;
/* } *//*
* else { results.count = mStringFilterList.size();
* results.values = mStringFilterList; }
*/
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
filteredData = (ArrayList<String>) results.values;
notifyDataSetChanged();
}
}
}
活动::
public class SecondActivity extends Activity {
// ArrayAdapter<String> myAdapter;
ImageAdapter myAdapter;
ListView listView;
// String[] dataArray = new String[] {"India","Androidhub4you", "Pakistan",
// "Srilanka", "Nepal", "Japan"};
private ArrayList<String> dataArray = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
dataArray.add("India");
dataArray.add("Androidhub4you");
dataArray.add("Pakistan");
dataArray.add("Srilanka");
dataArray.add("Nepal");
dataArray.add("Japan");
listView = (ListView) findViewById(R.id.listview);
// myAdapter = new ArrayAdapter<String>(this,
// android.R.layout.simple_list_item_1, dataArray);
myAdapter = new ImageAdapter(SecondActivity.this, dataArray);
listView.setAdapter(myAdapter);
listView.setTextFilterEnabled(true);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
System.out.println(arg2 + " --postion");
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.second, menu);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
.getActionView();
searchView.setSearchableInfo(searchManager
.getSearchableInfo(getComponentName()));
searchView.setIconifiedByDefault(false);
SearchView.OnQueryTextListener textChangeListener = new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextChange(String newText) {
// this is your adapter that will be filtered
myAdapter.getFilter().filter(newText);
System.out.println("on text chnge text: " + newText);
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
// this is your adapter that will be filtered
myAdapter.getFilter().filter(query);
System.out.println("on query submit: " + query);
return true;
}
};
searchView.setOnQueryTextListener(textChangeListener);
return super.onCreateOptionsMenu(menu);
}
}
答案 0 :(得分：1)
在适配器中移动
TextView textView = (TextView) gridView.findViewById(R.id.grid_item_label);
textView.setText(originalData.get(position));
在返回声明之前。
getView方法的工作原理：
如果视图已经可用，请使用该视图，如果该视图不可用，请创建一个新视图。现在适配器有一个视图，用数据加载它。
完整代码
public View getView(int position, View convertView, ViewGroup parent) {
View gridView;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// gridView = new View(context); // this line is useless, you're overwriting the variable on the next line
// inflate new layout
// gridView = inflater.inflate(R.layout.city_list_item, null); // wrong
gridView = inflater.inflate(R.layout.city_list_item, parent, false); // right
} else {
// reuse previously created view
gridView = (View) convertView;
}
// set value into textview
TextView textView = (TextView) gridView.findViewById(R.id.grid_item_label);
textView.setText(originalData.get(position));
// set image based on selected text
//ImageView imageView = (ImageView) gridView.findViewById(R.id.grid_item_image);
//imageView.setImageResource(R.drawable.city_image);
// finding views all over again is not effective, google "viewholder"
return gridView;
}
修改
要加载的正确项目不是来自原始数据集，而是来自过滤后的数据集。正确实施String getItem(int)方法后，请始终在View getView(int, View, parent)。
textView.setText(getItem(position));