【Android学习】日期和时间选择对话框

实现功能

实现日期和时间选择的对话框，具体效果可看下图(以日期为例)

具体代码

1 日期对话框

1.1 xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:gravity="center"><DatePickerandroid:id="@+id/datePicker"android:layout_width="match_parent"android:layout_height="wrap_content"android:calendarViewShown="false"android:datePickerMode="spinner"/><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"android:gravity="center"android:padding="10dp"><Buttonandroid:id="@+id/btn_date"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="选择日期"/><Buttonandroid:id="@+id/btn_ok"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="确定"/></LinearLayout><TextViewandroid:id="@+id/tv_date"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="尚未选择"android:textSize="20sp"/>
</LinearLayout>

1.2 Java

package com.example.learn;import androidx.appcompat.app.AppCompatActivity;import android.app.DatePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.DatePicker;
import android.widget.TextView;import java.util.Calendar;public class DatePickerActivity extends AppCompatActivity implements View.OnClickListener, DatePickerDialog.OnDateSetListener {private TextView tv;private DatePicker dp;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_date_picker);findViewById(R.id.btn_ok).setOnClickListener(this);findViewById(R.id.btn_date).setOnClickListener(this);tv=findViewById(R.id.tv_date);dp = findViewById(R.id.datePicker);}@Overridepublic void onClick(View view) {switch(view.getId()){case R.id.btn_ok:String desc=String.format("%d年%d月%d日",dp.getYear(),dp.getMonth()+1,dp.getDayOfMonth());tv.setText(desc);break;case R.id.btn_date://获取当前时间Calendar now = Calendar.getInstance();DatePickerDialog dpd = new DatePickerDialog(this,this,now.get(Calendar.YEAR),now.get(Calendar.MONTH),now.get(Calendar.DAY_OF_MONTH));//显示dpd.show();break;}}@Overridepublic void onDateSet(DatePicker datePicker, int i, int i1, int i2) {String desc=String.format("%d年%d月%d日",i,i1+1,i2);tv.setText(desc);}
}

2 时间选择对话框

2.1 xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:gravity="center"><TimePickerandroid:id="@+id/timePicker"android:layout_width="match_parent"android:layout_height="wrap_content"android:timePickerMode="spinner"/><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"android:gravity="center"android:padding="10dp"><Buttonandroid:id="@+id/btn_time"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="选择时间"/><Buttonandroid:id="@+id/btn_ok"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="确定"/></LinearLayout><TextViewandroid:id="@+id/tv_date"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="尚未选择"android:textSize="20sp"/>
</LinearLayout>

2.2 java

package com.example.learn;import androidx.appcompat.app.AppCompatActivity;import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;import java.util.Calendar;public class TimePickerActivity extends AppCompatActivity implements View.OnClickListener, TimePickerDialog.OnTimeSetListener {private TextView tv;private TimePicker tp;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_time_picker);findViewById(R.id.btn_ok).setOnClickListener(this);findViewById(R.id.btn_time).setOnClickListener(this);tv=findViewById(R.id.tv_date);tp = findViewById(R.id.timePicker);}@Overridepublic void onClick(View view) {switch(view.getId()){case R.id.btn_ok:String desc=String.format("%d时%d分",tp.getCurrentHour(),tp.getCurrentMinute());tv.setText(desc);break;case R.id.btn_time://获取日历实例，包含日期和时分Calendar instance = Calendar.getInstance();//构建时间对话框
//                TimePickerDialog tpd = new TimePickerDialog(this,this,
//                        instance.get(Calendar.HOUR_OF_DAY),
//                        instance.get(Calendar.MINUTE),
//                        true);//添加样式TimePickerDialog tpd = new TimePickerDialog(this, android.R.style.Theme_Holo_Dialog,this,instance.get(Calendar.HOUR_OF_DAY),instance.get(Calendar.MINUTE),true);tpd.show();break;}}@Overridepublic void onTimeSet(TimePicker timePicker, int i, int i1) {String desc=String.format("%d时%d分",i,i1);tv.setText(desc);}
}