日历

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先看效果：

1.MainActivity:

package com.example.administrator.datedemo;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.DatePicker;import android.widget.TextView;import java.util.Calendar;public class MainActivity extends AppCompatActivity {    private TextView mStart, mEnd;    final int DATE_DIALOG = 1;    final int END_DIALOG = 2;    private int sYear, sMonth, sDay;    private int eYear, eMonth, eDay;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        setListener();    }    private void initView() {        mStart = (TextView) findViewById(R.id.start);        mEnd = (TextView) findViewById(R.id.end);    }    private void setListener() {        mStart.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                showDialog(DATE_DIALOG);            }        });        final Calendar calendar = Calendar.getInstance();        sYear = calendar.get(Calendar.YEAR);        sMonth = calendar.get(Calendar.MONTH);        sDay = calendar.get(Calendar.DAY_OF_MONTH);        mEnd.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                showDialog(END_DIALOG);            }        });        final Calendar ca = Calendar.getInstance();        eYear = ca.get(Calendar.YEAR);        eMonth = ca.get(Calendar.MONTH);        eDay = ca.get(Calendar.DAY_OF_MONTH);    }    @Override    protected Dialog onCreateDialog(int id) {        switch (id) {            case DATE_DIALOG:                return new DatePickerDialog(this, listener, sYear, sMonth, sDay);            case END_DIALOG:                return new DatePickerDialog(this, endListener, eYear, eMonth, eDay);        }        return null;    }    private DatePickerDialog.OnDateSetListener listener = new DatePickerDialog.OnDateSetListener() {        @Override        public void onDateSet(DatePicker datePicker, int year, int month, int day) {            sYear = year;            sMonth = month;            sDay = day;            mStart.setText(new StringBuffer().append(sYear).append("/").append(sMonth + 1).append("/").append(sDay));        }    };    private DatePickerDialog.OnDateSetListener endListener = new DatePickerDialog.OnDateSetListener() {        @Override        public void onDateSet(DatePicker datePicker, int year, int month, int day) {            eYear = year;            eMonth = month;            eDay = day;            mEnd.setText(new StringBuffer().append(eYear).append("/").append(eMonth + 1).append("/").append(eDay));        }    };}

2.布局：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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"    tools:context="com.example.administrator.datedemo.MainActivity">    <TextView        android:id="@+id/start"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerInParent="true"        android:background="#ff0"        android:text="开始时间!" />    <TextView        android:id="@+id/end"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/start"        android:layout_centerHorizontal="true"        android:layout_marginTop="16dp"        android:background="#f0f"        android:text="结束时间!" /></RelativeLayout>

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