Question

我是Android的新手。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。但我不知道如何打开上下文菜单但不使用适配器。你能指导我如何创建一个没有适配器的上下文菜单。这一行registerForContextMenu(listViewManagePage);不要求我覆盖任何方法。

Answer 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。
覆盖onCreateContextMenu（）以将项目添加到菜单

public void onCreateContextMenu（ContextMenu菜单，View v，ContextMenuInfo menuInfo）
{
        super.onCreateContextMenu（menu，v，menuInfo）;
        menu.setHeaderTitle（“选择动作”）;
        menu.add（0，v.getId（），0，“Call”）; // groupId，itemId，order，title
        menu.add（0，v.getId（），0，“SMS”）;
}
覆盖onContextItemSelected（）以处理菜单项的点击事件

public boolean onContextItemSelected（MenuItem item）{
        如果（item.getTitle（）== “呼叫”）{
            Toast.makeText（getApplicationContext（），“调用代码”，Toast.LENGTH_LONG）。show（）;
        }
        否则if（item.getTitle（）==“SMS”）{
            Toast.makeText（getApplicationContext（），“发送短信代码”，Toast.LENGTH_LONG）。show（）;
        }其他{
           返回false;
        }
      返回true;
  }

上下文菜单没有适配器

1 个答案: