如何顯示ContextMenu長按ListView Android？

Question

這是ListView中的聯系人列表，我希望當用戶longClick任何聯系人時， ContextMenu彈出窗口應顯示為“ call”和“ send sms”。我為ContextMenu編寫代碼，但ContextMenu仍未顯示在longClick請告訴我缺少的內容我的代碼。 這是MainaAtivity類

public class MainActivity extends AppCompatActivity {

ListView listView;
Button sync;
ProgressDialog progressDialog;
String name, phone;

ArrayList<Contact_list> listitem;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



    listitem = new ArrayList<Contact_list>();

    listView = (ListView) findViewById(R.id.listViewID);
    registerForContextMenu(listView);

    sync= (Button) findViewById(R.id.syncID);
    sync.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            // GET CONTACTS DATA


            GetContactsIntoArrayList();


            listView.setAdapter(new Custom_adapter(MainActivity.this, listitem));

            Toast.makeText(MainActivity.this, "import", Toast.LENGTH_SHORT).show();
        }
    });
}

public void GetContactsIntoArrayList(){
    Cursor cursor;
    cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null, null, null);

    while (cursor.moveToNext()) {

        name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));

        phone = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));


        listitem.add(new Contact_list(name,phone));



        listView.setAdapter(new Custom_adapter(MainActivity.this, listitem));

    }

    cursor.close();

    listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {

        public boolean onItemLongClick(AdapterView<?> arg0, View v,
                                       int index, long arg3) {
            // TODO Auto-generated method stub

            Log.v("long clicked","pos: " + index);


            //Log.d("tag", "message");
            String str=listView.getItemAtPosition(index).toString();

            Log.d("long click sucessfull: " ,str);
            return true;
        }
    });

}

 @Override
 public void onCreateContextMenu(ContextMenu menu, View v,ContextMenu.ContextMenuInfo menuInfo)
   {

       super.onCreateContextMenu(menu, v, menuInfo);
       menu.setHeaderTitle("Select The Action");
       menu.add(0, v.getId(), 0, "Call");
       menu.add(0, v.getId(), 0, "Send SMS");

}




@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()=="Call")
    {

        // Code to execute when clicked on This Item
    }
    else if(item.getTitle()=="Send SMS")
    {

        // Code to execute when clicked on This Item
        //
                                                            }
        else
        {
            return false;
        }
        return true;


    }


}

Answer 1

從您的代碼中刪除longpress方法，希望它可以工作

Answer 2

嘗試從以下位置交換行：

@Override
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenu.ContextMenuInfo menuInfo) {
  super.onCreateContextMenu(menu, v, menuInfo);
  menu.setHeaderTitle("Select The Action");
  menu.add(0, v.getId(), 0, "Call");
  menu.add(0, v.getId(), 0, "Send SMS");
}

至：

@Override
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenu.ContextMenuInfo menuInfo) {
  menu.setHeaderTitle("Select The Action");
  menu.add(0, v.getId(), 0, "Call");
  menu.add(0, v.getId(), 0, "Send SMS");
  super.onCreateContextMenu(menu, v, menuInfo);
}

更新資料

刪除listView.setOnItemLongClickListener因為您不能同時使用longclicklistener和上下文菜單。 要顯示上下文菜單，您只需要在放大視圖后調用registerForContextMenu(listView)並覆蓋onCreateContextMenu()創建菜單，並覆蓋onContextItemSelected()來處理用戶操作。