如何显示键盘以在AlertDialog中键入EditText？

Question

I made a custom alertDialog and in it I have put an EditText, but the problem is the keyboard won't show when I click on the EditText to write an input!

Here's my alert dialog class:

public class EditTaskDialog extends AlertDialog {



  Activity mParent;
    public EditTaskDialog(Context context, Activity parent) {
        super(context);
        mParent = parent;
    }

    @BindView(R.id.btn_edit_edti_task_dialog)
    Button btn_edit_edti_task_dialog;
    @BindView(R.id.tv_time_edit_task_dialog)
    TextView tv_time_edit_task_dialog;
    @BindView(R.id.ll_time_edit_task_dialog)
    LinearLayout ll_time_edit_task_dialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //the layout that have the edit text view
        setContentView(R.layout.edit_task_dialog);

        ButterKnife.bind(this);

        final DatePickerDialog.OnDateSetListener x = new DatePickerDialog.OnDateSetListener() {
            @Override
            public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                tv_time_edit_task_dialog.setText(dayOfMonth+ "/" + (month+1) +"/"+ year);
            }
        };

        ll_time_edit_task_dialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                new DatePickerDialog(
                        mParent,
                        x,
                        Calendar.getInstance().get(Calendar.YEAR),
                        Calendar.getInstance().get(Calendar.MONTH),
                        Calendar.getInstance().get(Calendar.DAY_OF_MONTH)
                ).show();

            }
        });
    }
}

Please notice that I can't use getSystemService() because it's connected to the activity that started the alertDialog so when I use it like this

InputMethodManager imm = (InputMethodManager)   mParent.getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);

the keyboard shows behind the alert dialog and in front of the starting activity

Answer 1

For hiding keyboard:

InputMethodManager imm = (InputMethodManager)getSystemService(
  Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(myEditText.getWindowToken(), 0);

For showing keyboard:

InputMethodManager imm = (InputMethodManager)   getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);

Answer 2

我解决了这个问题，而不是使用AlertDialog，我使用了Dialog类