为什么ListView中的项目不可点击?

时间:2016-01-01 11:28:17

标签: java android xml android-layout

列表视图中的项目无法点击我尝试使用getcurrentfocus()并在content_palce.xml中阻止RelativeLayout标记中的后代。 我想从列表中选择的是两个函数:

  1. 当我点击该项目时,会启动另一项活动。
  2. 当长按时,会显示上下文菜单。
  3. 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 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("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听众,但是......它没有用。列表可以滚动但不能单击。当你点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..这不会发生在我身上案件。似乎没有检测到点击。

6 个答案:

答案 0 :(得分:1)

添加此代码,然后使用它。

      placeslist .setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {

                }
            });

答案 1 :(得分:1)

添加

placeslist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            }
        });

答案 2 :(得分:0)

您的地方列表缺少 onItemClickListener ! 如果它有Button或其他,你可以将setOnClickListener设置为你的项目。

答案 3 :(得分:0)

1.当我点击该项目时,会启动另一项活动。

为此,在placeslist.setAdapter(listAdapter);之后添加以下代码:

  placeslist .setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        switch (position) {
            case 0:
                Intent i = new Intent(getApplicationContext(), YourNewActivty.class);
                startActivity(i);
                break;
        }
        }
        });

<强> 2。当长按时,会显示上下文菜单。

Check this

答案 4 :(得分:0)

Android不允许选择在项目布局中具有可聚焦元素的列表项。

在您的布局项目中禁用焦点

机器人:可聚焦=&#34;假&#34;

答案 5 :(得分:0)

在getView

中点击内部点击监听器,添加您想要执行的代码
public View getView(int position, View convertView, ViewGroup parent) {

View vi = convertView;

vi.setOnClickListener(new View.OnClickListener() {

 @Override
public void onClick(View v) {
    Toast.makeText(getApplicationContext(), "Position is:" + position, Toast.LENGTH_LONG);
        }
    });
    return vi;
}