Android:在Dialog中使用datepicker和timepicker

Question

我面临一个问题,我不知道如何解决.

我有一个活动,当我点击链接到此活动的菜单的特定项目时,会显示一个对话框并用于添加项目.此产品具有一个日期和时间,但我不管理有一个DatePicker与TimePicker此对话框中.我也尝试将活动传递给对话框并使用这个来显示DatePicker,但不起作用.在此之前,我在另一个Activity中处理了这些项目的创建.在这种情况下,它工作正常.但我发现Dialog更性感...... :-)你有什么想法吗？希望我不要太困惑.....非常感谢,

我编辑这篇文章来分享我遇到困难的代码.

我有一个基本Dialog的是试图用类DatePicker和TimePicker.基本上,Eclipse抱怨说:

• 这showDialog是未定义的View.OnClickListener()
• onCreateDialog方法:onCreateDialog(int)类型的方法EventCreateDialog必须覆盖或实现超类型方法
• DatePickerDialog 未定义(因为这不是活动)

所有这些东西都在一个Activity中运行,但我无法通过Dialog工作.

非常感谢,

包com.android.myapp;

public class TestDialog extends Dialog implements android.view.View.OnClickListener {
    static final int DATE_DIALOG_ID = 0;
    static final int TIME_DIALOG_ID = 1;
    private TextView mDateDisplay;
    private Button mPickDate;
    private Button mPickTime;
    private int mYear;
    private int mMonth;
    private int mDay;
    private int mHour;
    private int mMinute;
    private Button mButton_ok;
    private Button mButton_ko;

    private ReadyListener readyListener;

    private Context context;
    // the callback received when the user "sets" the date in the dialog
    private DatePickerDialog.OnDateSetListener mDateSetListener =
            new DatePickerDialog.OnDateSetListener() {
                public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                    mYear = year;
                    mMonth = monthOfYear;
                    mDay = dayOfMonth;
                    updateDisplay();
                }
            };
    private TimePickerDialog.OnTimeSetListener mTimeSetListener =
            new TimePickerDialog.OnTimeSetListener() {
                public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                    mHour = hourOfDay;
                    mMinute = minute;
                    updateDisplay();
                }
            };

    public TestDialog(Context context, ReadyListener readyListener) {
        super(context);
        this.context = context;
        this.readyListener = readyListener;
    }

    private static String pad(int c) {
        if (c >= 10)
            return String.valueOf(c);
        else
            return "0" + String.valueOf(c);
    }

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

        mButton_ok = (Button) findViewById(R.id.button_ok);
        mButton_ko = (Button) findViewById(R.id.button_ko);

        // Add listeners
        mButton_ok.setOnClickListener(this);
        mButton_ko.setOnClickListener(this);

        mDateDisplay = (TextView) findViewById(R.id.dateDisplay);
        mPickDate = (Button) findViewById(R.id.pickDate);
        mPickTime = (Button) findViewById(R.id.pickTime);
        // add a click listener to the button
        mPickDate.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                showDialog(DATE_DIALOG_ID);
            }
        });
        mPickTime.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                showDialog(TIME_DIALOG_ID);
            }
        });
        // get the current date
        final Calendar c = Calendar.getInstance();
        mYear = c.get(Calendar.YEAR);
        mMonth = c.get(Calendar.MONTH);
        mDay = c.get(Calendar.DAY_OF_MONTH);
        mHour = c.get(Calendar.HOUR_OF_DAY);
        mMinute = c.get(Calendar.MINUTE);
        updateDisplay();
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
            case DATE_DIALOG_ID:
                return new DatePickerDialog(this, mDateSetListener, mYear, mMonth, mDay);
            case TIME_DIALOG_ID:
                return new TimePickerDialog(this, mTimeSetListener, mHour, mMinute, false);
        }
        return null;
    }

    private void updateDisplay() {
        mDateDisplay.setText(
                new StringBuilder()
                        // Month is 0 based so add 1
                        .append(mMonth + 1).append("-")
                        .append(mDay).append("-")
                        .append(mYear).append(" ")
                        .append(pad(mHour)).append(":")
                        .append(pad(mMinute)));
    }

    @Override
    public void onClick(View v) {
        if (v == mButton_ok) {
            // Do stuff....
        }
        if (v == mButton_ko) {
            dismiss();
        }
    }

    public interface ReadyListener {
        public void ready(MyObj myObj);
    }
}

Answer 1

这应该有效：

mPickDate.setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) { context.showDialog(DATE_DIALOG_ID); }
            });

onCreateDialog 只能从活动内部调用