TimePickerDialog、TimePicker、DatePickerDialog、DatePicker用法

　　四个类中不带Dialog的都是对应的控件，带Dialog是相应的弹出的对话框，比如完成设置闹钟或者选择生日等应用中会用到。下面以TimePickerDialog为例介绍2中设置时间的方法：

1、谷歌sdk文档piker中介绍的一种方法：

　　<1>构建自己的Dilog类：　　　　

package com.example.user.spinnertest2;

import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.text.format.DateFormat;
import android.widget.TimePicker;

import java.util.Calendar;

/**
* Created by user on 2016/10/12.
*/
//千万别导错了包
public  class TimePickerFragment extends DialogFragment
implements TimePickerDialog.OnTimeSetListener {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);

// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
@Override//执行选择时间后的操作
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user

System.out.println("成功"+hourOfDay+"haha"+minute);
}

}

　　需要注意继承导入的包必须是import android.support.v4.app.DialogFragment;之前导入错误导致后面的主函数

timePickerFragment.show(getSupportFragmentManager(), "af")显示dialog时候总是出错，这主要是要兼容3.0前的设置

/要修改相应的activity继承android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity {// AppCompatActivity

private TimePickerFragment timePickerFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
timePickerFragment = new TimePickerFragment();
//显示dialog
timePickerFragment.show(getSupportFragmentManager(), "af");

}

}

　　这里需要注意的是：修改显示dialog的activity继承android.support.v4.app.FragmentActivity;

2、直接创建dialog

TimePickerDialog timePickerDialog =new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener(){

@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
System.out.println("成功"+hourOfDay+"haha"+minute);
}
},  6, 60 ,
true); //构造设置的时间为默认的时间
timePickerDialog.show();