java– 为什么ListView中的项目不可点击？

概述列表视图中的项目不可点击我尝试使用getcurrentfocus()并在content_palce.xml中的RelativeLayout标记中阻止后代.我想从列表中选择的是两个函数：>当我单击该项目时,将启动另一个活动.>长按时,会显示上下文菜单.PlaceActiviy.javapackageabdualla.com.covuninavigator;

列表视图中的项目不可点击我尝试使用getcurrentfocus()并在content_palce.xml中的relativeLayout标记中阻止后代.
我想从列表中选择的是两个函数：

>当我单击该项目时,将启动另一个活动.
>长按时,会显示上下文菜单.

PlaceActiviy.java

        package abdualla.com.covuninavigator;import androID.annotation.TargetAPI;import androID.app.Fragment;import androID.app.FragmentManager;import androID.app.ListActivity;import androID.content.Context;import androID.net.Uri;import androID.os.AsyncTask;import androID.os.Build;import androID.support.design.Widget.floatingActionbutton;import androID.support.design.Widget.NavigationVIEw;import androID.support.design.Widget.Snackbar;import androID.support.v4.Widget.DrawerLayout;import androID.support.v7.app.ActionbarDrawerToggle;import androID.support.v7.app.AppCompatActivity;import androID.os.Bundle;import androID.support.v7.Widget.Toolbar;import androID.text.Editable;import androID.text.TextUtils;import androID.text.TextWatcher;import androID.util.Log;import androID.vIEw.ContextMenu;import androID.vIEw.LayoutInflater;import androID.vIEw.MenuItem;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.AdapterVIEw;import androID.Widget.ArrayAdapter;import androID.Widget.EditText;import androID.Widget.ListVIEw;import androID.Widget.SearchVIEw;import androID.Widget.TextVIEw;import androID.Widget.Toast;import com.Google.androID.gms.appindexing.Action;import com.Google.androID.gms.appindexing.AppIndex;import com.Google.androID.gms.common.API.Googleapiclient;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;//Places Listpublic 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("androID-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("androID-app://abdualla.com.covuninavigator/http/host/path")        );        AppIndex.AppIndexAPI.end(clIEnt, vIEwAction);        clIEnt.disconnect();    }}

activity_place.xml

<?xml version="1.0" enCoding="utf-8"?><androID.support.design.Widget.CoordinatorLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    xmlns:app="http://schemas.androID.com/apk/res-auto"    xmlns:tools="http://schemas.androID.com/tools"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:fitsSystemwindows="true"    tools:context="abdualla.com.covuninavigator.PlaceActivity">    <androID.support.design.Widget.AppbarLayout        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:theme="@style/Apptheme.AppbarOverlay">        <androID.support.v7.Widget.Toolbar            androID:ID="@+ID/toolbar"            androID:layout_wIDth="match_parent"            androID:layout_height="?attr/actionbarSize"            androID:background="?attr/colorPrimary"            app:popuptheme="@style/Apptheme.PopupOverlay"            androID:title="Places List"/>    </androID.support.design.Widget.AppbarLayout>    <include layout="@layout/content_place" />    <androID.support.design.Widget.floatingActionbutton        androID:ID="@+ID/fab"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_gravity="bottom|end"        androID:layout_margin="@dimen/fab_margin"        androID:src="@androID:drawable/ic_input_add" /></androID.support.design.Widget.CoordinatorLayout>

content_place.xml

<?xml version="1.0" enCoding="utf-8"?><relativeLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:layout_wIDth="fill_parent"    androID:layout_height="fill_parent"    xmlns:app="http://schemas.androID.com/apk/res-auto"    androID:orIEntation="horizontal">    <ListVIEw xmlns:androID="http://schemas.androID.com/apk/res/androID"        androID:ID="@+ID/List"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_below="@+ID/searchplaces"        />    <androID.support.design.Widget.AppbarLayout        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:theme="@style/Apptheme.AppbarOverlay"        androID:ID="@+ID/vIEw" />    <EditText        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:ID="@+ID/searchplaces"        androID:layout_margintop="47dp"        androID:layout_below="@+ID/vIEw"        androID:layout_alignParentleft="true"        androID:layout_alignParentStart="true"        androID:layout_alignParentRight="true"        androID:layout_alignParentEnd="true" /></relativeLayout>

listadapter.java

package abdualla.com.covuninavigator;import androID.app.Activity;import androID.content.Context;import androID.content.DialogInterface;import androID.content.res.Resources;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.AdapterVIEw;import androID.Widget.BaseAdapter;import androID.Widget.Filter;import androID.Widget.Filterable;import androID.Widget.ImageVIEw;import androID.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onitemclick监听器,但它没有用.列表可以滚动但不能单击.单击列表视图时会显示反馈..如果你有一个clickListener会发生一些事情….如果你不会发生任何事情,但无论如何它都会检测到点击..这种情况不会发生在我的情况下.似乎没有检测到点击.

解决方法:

添加此代码然后它的工作.

      placesList .setonClickListener(new VIEw.OnClickListener() {                @OverrIDe                public voID onClick(VIEw vIEw) {                }            });

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