Android開發之DatePickerDialog

創建DatePickerDialog的步驟？

1.聲明一個監聽器，使用匿名內部類。

2.複寫onCreateDialog()方法。

3.在需要的時候調用showDialog方法。

MainActivity.java:

package com.mycompany.datepicker;

import android.app.DatePickerDialog;
import android.app.Dialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;

public class MainActivity extends AppCompatActivity {
    private Button showDatePicker;
    private static final int DATE_PICKER_ID = 1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        showDatePicker = (Button) findViewById(R.id.showDatePicker);
        showDatePicker.setOnClickListener(new ButtonListener());
    }

    private class ButtonListener implements View.OnClickListener{
        @Override
        public void onClick(View v) {
            //  此方法用於顯示DatePickerDialog
            showDialog(DATE_PICKER_ID);
        }
    }

    DatePickerDialog.OnDateSetListener onDateSetListener
            = new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            int month = monthOfYear + 1;
            System.out.println(year + "-" + month  + "-" + dayOfMonth);
        }
    };

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id){
            case DATE_PICKER_ID:
                return new DatePickerDialog(this, onDateSetListener, 2016, 0, 1);
        }
        return null;
    }
}