我正在尝试做一个搜索栏,根据用户输入的关键字过滤列表视图,代码没有错误,但根本没有过滤。知道可能是什么问题吗?我尝试了各种方法,但都没有成功。
创建
super.onCreate(savedInstanceState);
// set layout for the main screen
setContentView(R.layout.layout_main);
// load list application
mListAppInfo = (ListView)findViewById(R.id.lvApps);
EditText search = (EditText)findViewById(R.id.EditText01);
mListAppInfo.setTextFilterEnabled(true);
// create new adapter
final AppInfoAdapter adapter = new AppInfoAdapter(this, Utilities.getInstalledApplication(this), getPackageManager());
// set adapter to list view
mListAppInfo.setAdapter(adapter);
search.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
Log.e("TAG", "ontextchanged");
adapter.getFilter().filter(s); //Filter from my adapter
adapter.notifyDataSetChanged(); //Update my view
}
});
阵列适配器类
public class AppInfoAdapter extends ArrayAdapter<ApplicationInfo> {
private Context mContext;
PackageManager mPackManager;
public AppInfoAdapter(Context c, List<ApplicationInfo> list, PackageManager pm) {
super(c, 0, list);
mContext = c;
mPackManager = pm;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// get the selected entry
ApplicationInfo entry = (ApplicationInfo) getItem(position);
Log.e("TAG", entry.toString());
// reference to convertView
View v = convertView;
// inflate new layout if null
if(v == null) {
LayoutInflater inflater = LayoutInflater.from(mContext);
v = inflater.inflate(R.layout.layout_appinfo, null);
}
// load controls from layout resources
ImageView ivAppIcon = (ImageView)v.findViewById(R.id.ivIcon);
TextView tvAppName = (TextView)v.findViewById(R.id.tvName);
TextView tvPkgName = (TextView)v.findViewById(R.id.tvPack);
// set data to display
ivAppIcon.setImageDrawable(entry.loadIcon(mPackManager));
tvAppName.setText(entry.loadLabel(mPackManager));
tvPkgName.setText(entry.packageName);
// return view
return v;
}
}
有两种可能的方法来解决此
1。使用您自己的筛选算法来筛选适配器。有关更多信息,请参阅此博客文章http://www.mokasocial.com/2010/07/arrayadapte-filtering-and-you/
2。第二个更简单的方法是覆盖您可能已经定义的Custom RowItem类中的tostring方法
@Override
public String toString() {
return name + "n" + description;
}
并使用适配器.getFilter().filter;因此,您使用它现在可以工作了,因为您的适配器现在返回一个有效的字符串来过滤
调用adapter.getFilter().filter(s)
使用ArrayAdapter的默认String
筛选逻辑,但由于您的列表类型为ApplicationInfo
,因此ArrayAdaper使用ApplicationInfo#toString()
进行项目比较
这看起来不像是你想要过滤的东西。