android r日期比较好,Android Studio 日期选择器和时间选择器

Android开发从入门到精通(案例版1)

·日期选择器

首先是.xml文件，主要就是加入标签

在看activity，

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.DatePicker;

import android.widget.Toast;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

int year,month,day;

DatePicker datePicker;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

datePicker=findViewById(R.id.datePicker1);

Calendar calendar=Calendar.getInstance();

/**

* 初始化时获得日期

*/

year=calendar.get(Calendar.YEAR);

month=calendar.get(Calendar.MONTH);

day=calendar.get(Calendar.DAY_OF_MONTH);

datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() {

@Override

public void onDateChanged(DatePicker datePicker, int year1, int month1, int day1) {

/**

*year1,month1,day1是改变后获取的新日期

*/

MainActivity.this.year=year1;

MainActivity.this.month=month1;

MainActivity.this.day=day1;

show(year,month,day);

}

});

}

private void show(int i, int i1, int i2) {

String str=i+"年"+(1+i1)+"月"+i2+'日';

//用Toast显示变化后的日期

Toast.makeText(MainActivity.this,str,Toast.LENGTH_SHORT).show();

}

}

图片展示：

·时间选择器

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

TimePicker timePicker=findViewById(R.id.timePicker);

//默认是12小时，setIs24HourView设置成24小时·

timePicker.setIs24HourView(true);

timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {

@Override

public void onTimeChanged(TimePicker timePicker, int hourOfDay, int minute) {

String str=hourOfDay+"时"+minute+"分";

Toast.makeText(MainActivity.this,str,Toast.LENGTH_SHORT).show();

}

});

}

}