我正在尝试使用列表视图制作 Android 应用程序,并在该列表视图中包含项目和子项目。一切正常,除了过滤文本。我一直用
list.setTextFilterEnabled(true);
但是当我输入某些内容时,列表中的所有内容都会消失。这是我的主要活动:
package com.macura.chatdictionary;
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.app.SearchManager;
import android.content.Context;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.inputmethod.InputMethodManager;
import android.widget.ListView;
import android.widget.SearchView;
public class MainActivity extends Activity {
public ListView lv;
private CustomAdapter adapter;
private ArrayList<Custom> fetch = new ArrayList<Custom>();
String[] from = new String[] { "title", "description" };
int[] to = new int[] { R.id.title, R.id.description };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Custom one = new Custom("Big1","Small1");
Custom two = new Custom("Big2","Small2");
Custom three = new Custom("Big3","Small3");
fetch.add(one);
fetch.add(two);
fetch.add(three);
lv = (ListView) findViewById(R.id.listView1);
adapter = new CustomAdapter(MainActivity.this,
R.id.listView1,
fetch);
lv.setAdapter(adapter);
lv.setTextFilterEnabled(true);
}
public void filterItems(String newItem){
}
@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.main_actionbar, menu);
getMenuInflater().inflate(R.menu.main, menu);
// Associate searchable configuration with the SearchView
SearchManager searchManager =
(SearchManager) getSystemService(Context.SEARCH_SERVICE);
final SearchView searchView =
(SearchView) menu.findItem(R.id.search).getActionView();
searchView.setSearchableInfo(
searchManager.getSearchableInfo(getComponentName()));
final SearchView.OnQueryTextListener queryTextListener = new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextChange(String newText) {
if (TextUtils.isEmpty(newText)) {
lv.clearTextFilter();
} else {
lv.setFilterText(newText);
}
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
InputMethodManager imm = (InputMethodManager)getSystemService(
Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(searchView.getWindowToken(), 0);
return true;
}
};
searchView.setOnQueryTextListener(queryTextListener);
return true;
}
}
这是我的 CustomAdapter.java:
package com.macura.chatdictionary;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class CustomAdapter extends ArrayAdapter<Custom>{
private ArrayList<Custom> entries;
private Activity activity;
public CustomAdapter(Activity a, int textViewResourceId, ArrayList<Custom> entries) {
super(a, textViewResourceId, entries);
this.entries = entries;
this.activity = a;
}
public static class ViewHolder{
public TextView item1;
public TextView item2;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
ViewHolder holder;
if (v == null) {
LayoutInflater vi =
(LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.listview_layout, null);
holder = new ViewHolder();
holder.item1 = (TextView) v.findViewById(R.id.title);
holder.item2 = (TextView) v.findViewById(R.id.description);
v.setTag(holder);
}
else
holder=(ViewHolder)v.getTag();
final Custom custom = entries.get(position);
if (custom != null) {
holder.item1.setText(custom.getcustomBig());
holder.item2.setText(custom.getcustomSmall());
}
return v;
}
}
这是我的 Custom.java:
package com.macura.chatdictionary;
public class Custom {
private String customBig;
private String customSmall;
public Custom(String string, String string2) {
this.customBig = string;
this.customSmall = string2;
}
public String getcustomBig() { return customBig; }
public void setcustomBig(String customBig) { this.customBig = customBig; }
public String getcustomSmall() { return customSmall; }
public void setcustomSmall(String customSmall) { this.customSmall = customSmall; }
}
这是我的 listview_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/description"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="15sp"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceSmall" />
</LinearLayout>
我必须做什么才能使过滤文本起作用?