android - 没有适配器的上下文菜单

Question

我是 Android 新手。我有一个像这样的主类

    public class SearchDay extends AppCompatActivity implements View.OnClickListener {
    private ImageButton insertDate;
    private Calendar cal;
    private int day;
    private int month;
    private int year;
    DatabaseHelper db;
    private Spinner SelectTypeNote;
    private EditText et;
    private Button btnSubmitSearchByDay, btnCancelSearchByDay;
    SimpleCursorAdapter dataAdapter;
    private static final int REQUEST_CODE = 10;
    private ListView listViewManagePage;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search_day);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setTitle("Tìm kiếm theo ngày");

        SelectTypeNote = (Spinner) findViewById(R.id.TypeNote_SearchByDay);
        insertDate = (ImageButton) findViewById(R.id.dateInsertSearchByDay);
        cal = Calendar.getInstance();
        et = (EditText) findViewById(R.id.dateInsertSearchByDay_editText);
        btnSubmitSearchByDay = (Button) findViewById(R.id.searchByDay);
        btnCancelSearchByDay = (Button) findViewById(R.id.cancelSearchByDay);

        db = new DatabaseHelper(this);

        cal = Calendar.getInstance();
        day = cal.get(Calendar.DAY_OF_MONTH);
        month = cal.get(Calendar.MONTH);
        year = cal.get(Calendar.YEAR);
        insertDate.setOnClickListener(this);

        Bundle extras = getIntent().getExtras();
        final String idUser = extras.getString("IdUser");
        setBtnSubmitNoteSearchByDay();
        setBtnCancelNoteSearchByDay(idUser);
//        registerForContextMenu(listViewManagePage);
        listViewManagePage = (ListView) findViewById(R.id.listView_SearchByDay);
        listViewManagePage.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast.makeText(SearchDay.this, "Thanh cong", Toast.LENGTH_SHORT).show();
                registerForContextMenu(listViewManagePage);
            }

        });
    }
}

当我点击 ListView 中的项目时，它是成功的。但是我不知道如何在不使用适配器的情况下打开上下文菜单。你能指导我如何在没有适配器的情况下创建上下文菜单吗？此行 registerForContextMenu(listViewManagePage); 不要求我覆盖任何方法。

Answer 1

1. 您只需在代码中注册一次上下文菜单。在 OnItemClickListener 事件之外注册它。

2. 覆盖 onCreateContextMenu() 以将项目添加到您的菜单

   public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)
   {
   super.onCreateContextMenu(menu, v, menuInfo);
   menu.setHeaderTitle("选择 Action ");
   menu.add(0, v.getId(), 0, "Call");//groupId,itemId,order,title
   menu.add(0, v.getId(), 0, "短信");
   }

3. 覆盖 onContextItemSelected() 以处理菜单项的点击事件

   公共(public) bool 值 onContextItemSelected(菜单项){
   如果(item.getTitle()==“调用”){
   Toast.makeText(getApplicationContext(),"调用代码",Toast.LENGTH_LONG).show();
   
   否则如果(item.getTitle()==“短信”){
   Toast.makeText(getApplicationContext(),"发送短信代码",Toast.LENGTH_LONG).show();
   }否则{
   返回错误；
   
   返回真值；