Java 修复操作栏中searchview的getfilter
到目前为止,我有三个选项卡(可滚动),它们是带有ActionBarActivity implements ActionBar.TabListener的片段 我试图在按下搜索图标时添加searchview功能,以便弹出一条edittext来过滤我要搜索的应用程序 我的目标是这样: 目前,我正在尝试实施我从中学到的: 因此,现在我的ActionBarActivity中有一个:Java 修复操作栏中searchview的getfilter,java,android,android-actionbar,baseadapter,android-actionbar-compat,Java,Android,Android Actionbar,Baseadapter,Android Actionbar Compat,到目前为止,我有三个选项卡(可滚动),它们是带有ActionBarActivity implements ActionBar.TabListener的片段 我试图在按下搜索图标时添加searchview功能,以便弹出一条edittext来过滤我要搜索的应用程序 我的目标是这样: 目前,我正在尝试实施我从中学到的: 因此,现在我的ActionBarActivity中有一个: @Override public boolean onCreateOptionsMenu(Menu men
@Override
public boolean onCreateOptionsMenu(Menu menu){
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.block, menu);
final EditText editText = (EditText) menu.findItem(
R.id.action_search).getActionView();
editText.addTextChangedListener(textWatcher);
MenuItem menuItem = menu.findItem(R.id.action_search);
menuItem.setOnActionExpandListener(new OnActionExpandListener() {
@Override
public boolean onMenuItemActionCollapse(MenuItem item) {
// Do something when collapsed
return true; // Return true to collapse action view
}
@Override
public boolean onMenuItemActionExpand(MenuItem item) {
editText.clearFocus();
return true; // Return true to expand action view
}
});
return super.onCreateOptionsMenu(menu);
}
private TextWatcher textWatcher = new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
if (null != mAdapter) {
mAdapter.getFilter().filter(s);
}
}
问题是无法解决getFilter方法。在这种情况下,我不确定该怎么办
我的适配器类是:
package com.ibc.android.demo.appslist.app;
import android.app.Activity;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
import android.view.View.OnClickListener;
import com.spicycurryman.getdisciplined10.app.R;
import java.util.List;
public class ApkAdapter extends BaseAdapter {
List<PackageInfo> packageList;
Activity context;
PackageManager packageManager;
boolean[] itemChecked;
public ApkAdapter(Activity context, List<PackageInfo> packageList,
PackageManager packageManager) {
super();
this.context = context;
this.packageList = packageList;
this.packageManager = packageManager;
itemChecked = new boolean[packageList.size()];
}
private class ViewHolder {
TextView apkName;
CheckBox ck1;
}
public int getCount() {
return packageList.size();
}
public Object getItem(int position) {
return packageList.get(position);
}
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
LayoutInflater inflater = context.getLayoutInflater();
if (convertView == null) {
convertView = inflater.inflate(R.layout.installed_apps, null);
holder = new ViewHolder();
holder.apkName = (TextView) convertView
.findViewById(R.id.appname);
holder.ck1 = (CheckBox) convertView
.findViewById(R.id.checkBox1);
convertView.setTag(holder);
//holder.ck1.setTag(packageList.get(position));
} else {
holder = (ViewHolder) convertView.getTag();
}
// ViewHolder holder = (ViewHolder) convertView.getTag();
PackageInfo packageInfo = (PackageInfo) getItem(position);
Drawable appIcon = packageManager
.getApplicationIcon(packageInfo.applicationInfo);
String appName = packageManager.getApplicationLabel(
packageInfo.applicationInfo).toString();
appIcon.setBounds(0, 0, 75, 75);
holder.apkName.setCompoundDrawables(appIcon, null, null, null);
holder.apkName.setCompoundDrawablePadding(15);
holder.apkName.setText(appName);
holder.ck1.setChecked(false);
if (itemChecked[position])
holder.ck1.setChecked(true);
else
holder.ck1.setChecked(false);
holder.ck1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (holder.ck1.isChecked())
itemChecked[position] = true;
else
itemChecked[position] = false;
}
});
return convertView;
}
}
package com.ibc.android.demo.appslist.app;
导入android.app.Activity;
导入android.content.pm.PackageInfo;
导入android.content.pm.PackageManager;
导入android.graphics.drawable.drawable;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.BaseAdapter;
导入android.widget.CheckBox;
导入android.widget.TextView;
导入android.view.view.OnClickListener;
导入com.spicycurryman.getstructed10.app.R;
导入java.util.List;
公共类ApkAdapter扩展BaseAdapter{
包装商名单;
活动语境;
包装管理器包装管理器;
布尔[]项检查;
公共ApkAdapter(活动上下文、列表包装员、,
软件包管理器(软件包管理器){
超级();
this.context=上下文;
this.packageList=packageList;
this.packageManager=packageManager;
itemChecked=新布尔值[packageList.size()];
}
私有类视窗持有者{
文本视图;
复选框ck1;
}
public int getCount(){
返回packageList.size();
}
公共对象getItem(int位置){
返回包装商。获取(位置);
}
公共长getItemId(int位置){
返回0;
}
@凌驾
公共视图getView(最终整数位置、视图转换视图、视图组父视图){
最终持票人;
LayoutInflater充气器=上下文。getLayoutInflater();
if(convertView==null){
convertView=充气机。充气(R.layout.installed_apps,null);
holder=新的ViewHolder();
holder.apkName=(TextView)convertView
.findviewbyd(R.id.appname);
holder.ck1=(复选框)convertView
.findViewById(R.id.复选框1);
convertView.setTag(支架);
//holder.ck1.setTag(packageList.get(位置));
}否则{
holder=(ViewHolder)convertView.getTag();
}
//ViewHolder=(ViewHolder)convertView.getTag();
PackageInfo PackageInfo=(PackageInfo)获取项目(位置);
可绘制的appIcon=packageManager
.getApplicationInfo(packageInfo.applicationInfo);
字符串appName=packageManager.getApplicationLabel(
packageInfo.applicationInfo.toString();
appIcon.setBounds(0,0,75,75);
holder.apkName.setCompoundDrawables(appIcon,null,null);
支架.附件.设置复合可拉伸衬垫(15);
holder.apkName.setText(appName);
holder.ck1.setChecked(假);
如果(项目选中[位置])
holder.ck1.setChecked(真);
其他的
holder.ck1.setChecked(假);
holder.ck1.setOnClickListener(新的OnClickListener(){
@凌驾
公共void onClick(视图v){
//TODO自动生成的方法存根
if(holder.ck1.isChecked())
itemChecked[位置]=真;
其他的
itemChecked[位置]=假;
}
});
返回视图;
}
}
我需要在适配器类中更改什么来解决getFilter方法错误?为什么?我还想知道是否有更优化/有效的方法来实现操作栏中的搜索…?ApkAdapter必须实现可过滤接口。然后,您需要编写自己的过滤逻辑来执行过滤。请记住,所有过滤逻辑都发生在后台线程上。这意味着您的所有适配器变异方法都需要有同步锁……除非您绝对肯定地知道,您的适配器在加载后将永远不会更改 注意,您的ApkAdapter实现没有做ArrayAdapter不能做的任何事情。因此,扩展ArrayAdapter类可能会更好,因为它已经支持过滤。然而,我要指出的是,ArrayAdapter有很多缺点
或者,如果您想避免编写自己的过滤代码的所有麻烦,我建议您检查一下。ApkAdapter必须实现可过滤接口。然后,您需要编写自己的过滤逻辑来执行过滤。请记住,所有过滤逻辑都发生在后台线程上。这意味着您的所有适配器变异方法都需要有同步锁……除非您绝对肯定地知道,您的适配器在加载后将永远不会更改 注意,您的ApkAdapter实现没有做ArrayAdapter不能做的任何事情。因此,扩展ArrayAdapter类可能会更好,因为它已经支持过滤。然而,我要指出的是,ArrayAdapter有很多缺点
或者,如果您想避免编写自己的过滤代码的所有麻烦,我建议您检查一下。首先在ApkAdapter类中实现Filterable 将此添加到apkAdapter类中
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemsFilter();
}
return mFilter;
}
private class ItemsFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
// TODO Auto-generated method stub
ArrayList<PackageInfo> packageList_2 = packageList;
String prefixString = prefix.toString().toLowerCase();
FilterResults results = new FilterResults();
ArrayList<PackageInfo> FilteredList = new ArrayList<PackageInfo>();
if (prefix == null || prefix.length() == 0) {
results.values = packageList_2;
results.count = packageList_2.size();
return results;
}
for (int i = 0; i < packageList_2.size(); i++) {
String filterText = prefix.toString().toLowerCase();
try {
PackageInfo data = packageList_2.get(i);
if (data.applicationInfo
.loadLabel(getActivity().getPackageManager())
.toString().toLowerCase().contains(filterText)) {
FilteredList.add(data);
} else if (data.packageName.contains(filterText)) {
FilteredList.add(data);
}
} catch (Exception e) {
Toast.makeText(getActivity(),
"exception e" + e.toString(),
Toast.LENGTH_SHORT).show();
}
}
results.values = FilteredList;
results.count = FilteredList.size();
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
Toast.makeText(getActivity(),"result-0 "+results.count,
Toast.LENGTH_SHORT).show();
packageList = (List<PackageInfo>) results.values;
notifyDataSetChanged();
}
}
首先在ApkAdapter类中实现Filterable 将此添加到apkAdapter类中
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemsFilter();
}
return mFilter;
}
private class ItemsFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
// TODO Auto-generated method stub
ArrayList<PackageInfo> packageList_2 = packageList;
String prefixString = prefix.toString().toLowerCase();
FilterResults results = new FilterResults();
ArrayList<PackageInfo> FilteredList = new ArrayList<PackageInfo>();
if (prefix == null || prefix.length() == 0) {
results.values = packageList_2;
results.count = packageList_2.size();
return results;
}
for (int i = 0; i < packageList_2.size(); i++) {
String filterText = prefix.toString().toLowerCase();
try {
PackageInfo data = packageList_2.get(i);
if (data.applicationInfo
.loadLabel(getActivity().getPackageManager())
.toString().toLowerCase().contains(filterText)) {
FilteredList.add(data);
} else if (data.packageName.contains(filterText)) {
FilteredList.add(data);
}
} catch (Exception e) {
Toast.makeText(getActivity(),
"exception e" + e.toString(),
Toast.LENGTH_SHORT).show();
}
}
results.values = FilteredList;
results.count = FilteredList.size();
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
Toast.makeText(getActivity(),"result-0 "+results.count,
Toast.LENGTH_SHORT).show();
packageList = (List<PackageInfo>) results.values;
notifyDataSetChanged();
}
}
ApkaAdapter必须实现可过滤的ifaceApkAdapter必须实现可过滤的ifaceThanks。我会试试这个。您是如何偶然发现的?在mAppAdapter.getFilter().filter(查询)中获取空指针异常;是的,我认为这有问题