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Android日期选择器,年月日判断处理。

Android日期选择器,年月日判断处理。_android


MainActivity.java


package com.yechaoa.datepickerdemo;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.NumberPicker;
import android.widget.TextView;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

private TextView tvDate;

private View mView;
private NumberPicker np1, np2, np3;

private int maxDay;

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

tvDate = (TextView) findViewById(R.id.tv_date);

tvDate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showDateDialog();
}
});

}

public void showDateDialog() {
mView = View.inflate(this, R.layout.date_dialog, null);
np1 = (NumberPicker) mView.findViewById(R.id.np1);
np2 = (NumberPicker) mView.findViewById(R.id.np2);
np3 = (NumberPicker) mView.findViewById(R.id.np3);

//获取当前日期
Calendar c = Calendar.getInstance();
final int year = c.get(Calendar.YEAR);
final int month = c.get(Calendar.MONTH)+1;//月份是从0开始算的
final int day = c.get(Calendar.DAY_OF_MONTH);

//设置年份
np1.setMaxValue(2999);
np1.setValue(year); //中间参数 设置默认值
np1.setMinValue(1900);

//设置月份
np2.setMaxValue(12);
np2.setValue(month);
np2.setMinValue(1);

//设置天数
np3.setMaxValue(31);
np3.setValue(day);
np3.setMinValue(1);

//年份滑动监听
np1.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
Log.i("NumberPicker","oldVal-----"+oldVal+"-----newVal-----"+newVal);
//平年闰年判断
if(newVal%4==0){
maxDay=29;
}else {
maxDay = 28;
}
//设置天数的最大值
np3.setMaxValue(maxDay);
}
});

//月份滑动监听
np2.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
Log.i("NumberPicker","oldVal-----"+oldVal+"-----newVal-----"+newVal);
//月份判断
switch (newVal){
case 2:
if(np1.getValue()%4==0){
maxDay=29;
}else{
maxDay=28;
}
break;
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
maxDay=31;
break;
default:
maxDay=30;
break;
}
//设置天数的最大值
np3.setMaxValue(maxDay);
}
});

new AlertDialog.Builder(MainActivity.this).setTitle("请选择时间")
.setView(mView)
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
int years = np1.getValue();
int months = np2.getValue();
int days = np3.getValue();
tvDate.setText(years + "年" + months + "月" + days + "日");
dialog.dismiss();
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.show();
}

}



github:​​https://github.com/yechaoa/DatePickerDemo​​




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