在自定义ListView中单击Long时创建上下文菜单

我想在使用自定义列表适配器创建的自定义列表中显示带有删除和编辑选项的上下文菜单（OnClickLong）。 我会发布代码

SpotListFragment

package com.pap.myspots.fragments; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import com.pap.myspots.R; import com.pap.myspots.R.layout; import com.pap.myspots.database.DBAdapter; import com.pap.myspots.listView.SpotList; import com.pap.myspots.listView.SpotListAdapter; import android.annotation.SuppressLint; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.ListFragment; import android.util.Log; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.LayoutInflater; import android.view.MenuInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.Toast; public class SpotListFragment extends Fragment implements OnClickListener{ String nome; String local; Button createToast; List nomes ; List locais ; ListView listView; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_spotlist, container, false); DBAdapter db = new DBAdapter(getActivity()); db.open(); Cursor cursor = db.getAllTitles(); nomes = new ArrayList(); while(cursor.moveToNext()){ String uname = cursor.getString(cursor.getColumnIndex("nome")); nomes.add(uname); } Cursor cursor2 = db.getAllTitles(); locais = new ArrayList(); while(cursor2.moveToNext()){ String ulocal = cursor2.getString(cursor.getColumnIndex("local")); locais.add(ulocal); } SpotListAdapter adapter = new SpotListAdapter(getActivity(), generateData()); // 2. Get ListView from activity_main.xml listView = (ListView) rootView.findViewById(R.id.spotList); // 3. setListAdapter listView.setAdapter(adapter); return rootView; } private ArrayList generateData(){ ArrayList items = new ArrayList(); int i = 0; while(nomes.size()>i){ items.add(new SpotList(new String(nomes.get(i)),new String(locais.get(i)))); i++; } return items; } @Override public void onClick(View v) { // TODO Auto-generated method stub } //Deleted individual cart items } 

SpotListAdapter

 package com.pap.myspots.listView; import java.util.ArrayList; import com.pap.myspots.R; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.TextView; public class SpotListAdapter extends ArrayAdapter { private final Context context; private final ArrayList itemsArrayList; public SpotListAdapter(Context context, ArrayList itemsArrayList) { super(context, R.layout.list_row, itemsArrayList); this.context = context; this.itemsArrayList = itemsArrayList; } @Override public View getView(int position, View convertView, ViewGroup parent) { // 1. Create inflater LayoutInflater inflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); // 2. Get rowView from inflater View rowView = inflater.inflate(R.layout.list_row, parent, false); // 3. Get the two text view from the rowView TextView labelView = (TextView) rowView.findViewById(R.id.title); TextView valueView = (TextView) rowView.findViewById(R.id.place); // 4. Set the text for textView labelView.setText(itemsArrayList.get(position).getNome()); valueView.setText(itemsArrayList.get(position).getLocal()); // 5. retrn rowView return rowView; } } 

SpotList（豆）

 package com.pap.myspots.listView; public class SpotList { public SpotList(String nome, String local) { super(); this.nome = nome; this.local = local; } public String getNome() { return nome; } public void setNome(String nome) { this.nome = nome; } public String getLocal() { return local; } public void setLocal(String local) { this.local = local; } private String nome; private String local; } 

Answer 1

首先，在onCreate方法中注册listView以获取上下文菜单：

 registerForContextMenu(yourListView); 

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通过覆盖onCreateContextMenu来创建contextmenu：

 @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo; _listPosition = info.position; // Get Index of long-clicked item super.onCreateContextMenu(menu, v, menuInfo); menu.setHeaderTitle("Choose Action"); // Context-menu title menu.add(0, v.getId(), 0, "Edit"); // Add element "Edit" menu.add(0, v.getId(), 1, "Delete"); // Add element "Delete" } 

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对上下文菜单中的点击做出反应：

  @Override public boolean onContextItemSelected(MenuItem item) { if(item.getTitle() == "Edit") // "Edit" chosen { // Do stuff } else if(item.getTitle() == "Delete") // "Delete" chosen { // Do stuff } else { return false; } return true; } 

Answer 2

下次只花几分钟自己谷歌：

• http://developer.android.com/guide/topics/ui/menus.html#context-menu
• http://www.stealthcopter.com/blog/2010/04/android-context-menu-example-on-long-press-gridview/

覆盖onCreateContextMenu（）以创建菜单，并使用onContextItemSelected（）来处理click事件

您还需要为上下文菜单注册listView。 你可以在片段的onActivityCreated（）方法中做到这一点：

 registerForContextMenu(listView); 

Answer 3

您必须使用上下文菜单注册自定义ListView。 使用方法registerForContextMenu(listView); 。 在onCreate调用此方法

Answer 4

我将在覆盖的ArrayList扩展的getView()方法中定义onLongClickListener 。 只需使用registerForContextView(convertView)在长按侦听器中registerForContextView(convertView)视图即可。

现在在您的Activity代码中，只需像在任何其他情况下一样定义上下文菜单：

 @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { ... menu.setHeaderTitle(...); menu.add(...); } @Override public boolean onContextItemSelected(MenuItem item) { final int mId = item.getItemId(); switch (mId) { case 0: ... break; default: break; } 

Answer 5

更精确：

  @Override public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); TreeViewList v1=(TreeViewList) v; //my custom listview AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo; final LinearLayout viewLayout = (LinearLayout) v1.getChildAt(info.position-v1.getFirstVisiblePosition());//if in list many items final TextView descriptionView = (TextView) viewLayout .findViewById(R.id.list_item_description); menu.add(0, v.getId(), 0, descriptionView.getText()); menu.add(0, v.getId(), 0, "Action 2"); }