java为什么ListView中的项目不可单击？
我的列表视图中的项目不可单击。我已尝试在内容空间的RelativeLayout标记中获取CurrentFocus（）并阻止子体。xml。 我只想从列表中看到两个函数：
- 当我单击该项目时，另一个活动将启动
- 长按时，将显示关联菜单
地点活动。爪哇
package abdualla.com.covuninavigator;
import 安卓.annotation.TargetApi;
import 安卓.app.Fragment;
import 安卓.app.FragmentManager;
import 安卓.app.ListActivity;
import 安卓.content.Context;
import 安卓.net.Uri;
import 安卓.os.AsyncTask;
import 安卓.os.Build;
import 安卓.support.design.widget.FloatingActionButton;
import 安卓.support.design.widget.NavigationView;
import 安卓.support.design.widget.Snackbar;
import 安卓.support.v4.widget.DrawerLayout;
import 安卓.support.v7.app.ActionBarDrawerToggle;
import 安卓.support.v7.app.AppCompatActivity;
import 安卓.os.Bundle;
import 安卓.support.v7.widget.Toolbar;
import 安卓.text.Editable;
import 安卓.text.TextUtils;
import 安卓.text.TextWatcher;
import 安卓.util.Log;
import 安卓.view.ContextMenu;
import 安卓.view.LayoutInflater;
import 安卓.view.MenuItem;
import 安卓.view.View;
import 安卓.view.ViewGroup;
import 安卓.widget.AdapterView;
import 安卓.widget.ArrayAdapter;
import 安卓.widget.EditText;
import 安卓.widget.ListView;
import 安卓.widget.SearchView;
import 安卓.widget.TextView;
import 安卓.widget.Toast;
import com.google.安卓.gms.appindexing.Action;
import com.google.安卓.gms.appindexing.AppIndex;
import com.google.安卓.gms.common.api.GoogleApiClient;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
//Places List
public class PlaceActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
DBHelper db = new DBHelper(this);
ListView placeslist;
EditText seachbar;
static ListAdapter listAdapter;
static ArrayList<Place> list;
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
@Override
protected void onCreate(Bundle savedInstanceState) {
//Un Comment to Build Database for First time run
// db.insertPlace("Alan Berry", "Coventry, West Midlands CV1 5FB", "52.407981", "-1.505527");
// db.insertPlace("Coventry Un*iversity College", "113A Gosftord Street Coventry CV15FB", "52.407439", "-1.500221");
// db.insertPlace("Bugatti", "Cox Street Coventry CV1 5FB", "52.407479", "-1.503390");
// db.insertPlace("Charles Ward", "Cox Street Coventry CV1 5FB", "52.408623", "-1.504856");
// db.insertPlace("Engineering & Computing Building", "Gulson Rd, Coventry, West Midlands CV1 2JH", "52.405607", "-1.499454");
// db.insertPlace("Ellen Terry", "Jordan Well,Coventry CV1 5RW", "52.406883", "-1.504703");
// db.insertPlace("Frederick Lanchester Library", "Frederick Lanchester Building, Coventry University, Coventry, West Midlands CV1 5DD", "52.406056", "-1.500545");
// db.insertPlace("George Elliot", "Coventry CV15LW", "52.408217", "-1.504890");
// db.insertPlace("Graham Sutherland", "Gosford Street, Coventry CV1", "52.407212", "-1.502934");
// db.insertPlace("The Hub", "Gosford Street, Coventry, West Midlands CV1 5QP", "52.407741", "-1.504792");
// db.insertPlace("Jaguar Building", "Gosford Street, Coventry, West Midlands CV1 5PJ", "52.407450", "-1.500545");
// db.insertPlace("James Starley", "Cox Street, Coventry, West Midlands CV1 5PH", "52.407892", "-1.504065");
// db.insertPlace("Maurice Foss", "Maurice Foss Building, Coventry, West Midlands CV1 5PH", "52.408047", "-1.503346");
// db.insertPlace("Multi-Storey Car Park", "Gosford St, Coventry, West Midlands CV1 5DD", "52.406288", "-1.499699");
// db.insertPlace("Priory Building", "Priory Street, Coventry", "52.407351", "-1.503692");
// db.insertPlace("Richard Crossman", "Much Park Street,Coventry, West Midlands CV1HF", "52.406666", "-1.505438");
// db.insertPlace("Sir John Laing Building", "Much Park Street,Coventry, West Midlands CV1HF", "52.405879", "-1.505003");
// db.insertPlace("Sir William Lyons", "Gosford Street, Coventry CV1", "52.407476", "-1.499722");
// db.insertPlace("Student Centre", "Gulson Rd, Coventry, West Midlands CV1 2JH", "52.404984", "-1.500694");
// db.insertPlace("Whitefriars", "Coventry CV1 2DS", "52.405255", "-1.501582");
// db.insertPlace("William Morris", "Cox Street, Coventry, West Midlands CV1 5PH", "52.407892", "-1.504065");
// db.insertPlace("Sports Centre", "Whitefriars Lane, Coventry, West Midlands CV1 2DS", "52.405973", "-1.504225");
// db.insertPlace("Coventry City Council", "Earl Street, Coventry, West Midlands CV1 5RR", "52.407355", "-1.508035");
//Un Comment to Build Database for First time run
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_place);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
FragmentManager fm = getFragmentManager();
AddPlaceFragement addPlaceFragement = new AddPlaceFragement();
addPlaceFragement.show(fm, "Add Place");
}
});
// DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
// ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
// this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
// drawer.setDrawerListener(toggle);
// toggle.syncState();
//
// NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
// navigationView.setNavigationItemSelectedListener(this);
// db.deleteAll();
placeslist = (ListView) findViewById(R.id.list);
seachbar = (EditText) findViewById(R.id.searchplaces);
list = db.getAllplaces();
listAdapter = new ListAdapter(this, list, getResources());
placeslist.setAdapter(listAdapter);
placeslist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(), "Position is:" + position, Toast.LENGTH_LONG);
}
});
if(placeslist.isClickable()){
Log.v("Clickable is ","Yes");
}
seachbar.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
listAdapter.getFilter().filter(s.toString());
}
@Override
public void afterTextChanged(Editable s) {
}
});
registerForContextMenu(placeslist);
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
@Override
public boolean onNavigationItemSelected(MenuItem item) {
return false;
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.setHeaderTitle("Select an Option");
menu.add(0, v.getId(), 0, "Show on Map");
menu.add(0, v.getId(), 0, "Delete");
}
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
// info.position will give the index of selected item
int IndexSelected=info.position;
if(item.getTitle()=="Delete"){
list.remove(IndexSelected);
listAdapter.notifyDataSetChanged();
}
else if (item.getTitle()=="Show on Map"){
Toast.makeText(getApplicationContext(),"Lat is:"+list.get(IndexSelected).getLat()+"lng is: "+list.get(IndexSelected).getLng(),Toast.LENGTH_LONG);
}
return super.onContextItemSelected(item);
}
@Override
public void onStart() {
super.onStart();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client.connect();
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Place Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app deep link URI is correct.
Uri.parse("安卓-app://abdualla.com.covuninavigator/http/host/path")
);
AppIndex.AppIndexApi.start(client, viewAction);
}
@Override
public void onStop() {
super.onStop();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Place Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app deep link URI is correct.
Uri.parse("安卓-app://abdualla.com.covuninavigator/http/host/path")
);
AppIndex.AppIndexApi.end(client, viewAction);
client.disconnect();
}
}
活动地点。xml
<?xml version="1.0" encoding="utf-8"?>
<安卓.support.design.widget.CoordinatorLayout xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
xmlns:app="http://schemas.安卓.com/apk/res-auto"
xmlns:tools="http://schemas.安卓.com/tools"
安卓:layout_width="match_parent"
安卓:layout_height="match_parent"
安卓:fitsSystemWindows="true"
tools:context="abdualla.com.covuninavigator.PlaceActivity">
<安卓.support.design.widget.AppBarLayout
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:theme="@style/AppTheme.AppBarOverlay">
<安卓.support.v7.widget.Toolbar
安卓:id="@+id/toolbar"
安卓:layout_width="match_parent"
安卓:layout_height="?attr/actionBarSize"
安卓:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay"
安卓:title="Places List"/>
</安卓.support.design.widget.AppBarLayout>
<include layout="@layout/content_place" />
<安卓.support.design.widget.FloatingActionButton
安卓:id="@+id/fab"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:layout_gravity="bottom|end"
安卓:layout_margin="@dimen/fab_margin"
安卓:src="@安卓:drawable/ic_input_add" />
</安卓.support.design.widget.CoordinatorLayout>
满足你的地方。xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
安卓:layout_width="fill_parent"
安卓:layout_height="fill_parent"
xmlns:app="http://schemas.安卓.com/apk/res-auto"
安卓:orientation="horizontal">
<ListView xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
安卓:id="@+id/list"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:layout_below="@+id/searchplaces"
/>
<安卓.support.design.widget.AppBarLayout
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:theme="@style/AppTheme.AppBarOverlay"
安卓:id="@+id/view" />
<EditText
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:id="@+id/searchplaces"
安卓:layout_marginTop="47dp"
安卓:layout_below="@+id/view"
安卓:layout_alignParentLeft="true"
安卓:layout_alignParentStart="true"
安卓:layout_alignParentRight="true"
安卓:layout_alignParentEnd="true" />
</RelativeLayout>
ListAdapter。爪哇
package abdualla.com.covuninavigator;
import 安卓.app.Activity;
import 安卓.content.Context;
import 安卓.content.DialogInterface;
import 安卓.content.res.Resources;
import 安卓.view.LayoutInflater;
import 安卓.view.View;
import 安卓.view.ViewGroup;
import 安卓.widget.AdapterView;
import 安卓.widget.BaseAdapter;
import 安卓.widget.Filter;
import 安卓.widget.Filterable;
import 安卓.widget.ImageView;
import 安卓.widget.TextView;
import java.util.ArrayList;
/**
* Created by amr on 28/12/15.
*/
public class ListAdapter extends BaseAdapter implements DialogInterface.OnClickListener, Filterable {
private Activity activity;
private ArrayList data;
private static LayoutInflater inflater=null;
public Resources res;
Place tempValues=null;
int i=0;
private ArrayList<Place> mOriginalValues;
private ArrayList<Place> mDisplayedValues;
public ListAdapter(Activity a, ArrayList d,Resources resLocal){
this.activity=a;
this.data=d;
this.res=resLocal;
this.mOriginalValues = d;
this.mDisplayedValues = d;
inflater=(LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
if(data.size()<=0)
return 1;
return data.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
data = (ArrayList<Place>) results.values; // has the filtered values
notifyDataSetChanged(); // notifies the data with new filtered values
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults(); // Holds the results of a filtering operation in values
ArrayList<Place> FilteredArrList = new ArrayList<Place>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<Place>(mDisplayedValues); // saves the original data in mOriginalValues
}
/********
*
* If constraint(CharSequence that is received) is null returns the mOriginalValues(Original) values
* else does the Filtering and returns FilteredArrList(Filtered)
*
********/
if (constraint == null || constraint.length() == 0) {
// set the Original result to return
results.count = mOriginalValues.size();
results.values = mOriginalValues;
} else {
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mOriginalValues.size(); i++) {
String data = mOriginalValues.get(i).name;
if (data.toLowerCase().startsWith(constraint.toString())) {
FilteredArrList.add(new Place(mOriginalValues.get(i).getName(),mOriginalValues.get(i).getAddress(),mOriginalValues.get(i).getLat(),mOriginalValues.get(i).getLng()));
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
public static class ViewHolder{
public TextView name;
public TextView address;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
ViewHolder holder;
if(convertView==null){
vi=inflater.inflate(R.layout.place_list_item,null);
holder=new ViewHolder();
holder.name=(TextView)vi.findViewById(R.id.placename);
holder.address=(TextView)vi.findViewById(R.id.address);
vi.setTag(holder);
}
else
holder=(ViewHolder)vi.getTag();
if(data.size()<=0)
{
holder.name.setText("No Places Found");
holder.address.setText("");
}
else{
tempValues=(Place)data.get(position);
holder.name.setText(tempValues.getName());
holder.address.setText(tempValues.getAddress());
}
vi.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
return vi;
}
@Override
public void onClick(DialogInterface dialog, int which) {
}
}
更新1：
我确实添加了McClick listener，但是。。它不起作用。列表可以滚动，但不能单击。单击列表视图时，将显示反馈。。如果你有一个clicklistener，就会发生一些事情。。。。如果不这样做，将不会发生任何事情，但它仍会检测到单击。。我的情况不是这样的。似乎没有检测到咔哒声
# 1 楼答案
添加要在单击内部时执行的代码单击getView内部的侦听器
# 2 楼答案
1。当我单击该项目时，另一个活动将启动
为此，在
placeslist.setAdapter(listAdapter);之后添加以下代码：2。长按时，将显示关联菜单
Check this
# 3 楼答案
加
# 4 楼答案
添加此代码，然后它就可以工作了
# 5 楼答案
Android不允许选择在项目布局中具有可聚焦元素的列表项目
在布局的项目中禁用可聚焦
android:focusable=“false”
# 6 楼答案
您的placeslist缺少一个侦听器！ 如果项目有按钮或其他按钮，则可以将setOnClickListener设置为项目