package com.example.alimjan.hello_world;

 import java.util.Calendar;

 /**

  * Created by alimjan on 7/15/2017.

  */

         import android.app.DatePickerDialog;

         import android.app.DatePickerDialog.OnDateSetListener;

 import android.content.Context;

 import android.content.Intent;

 import android.os.Bundle;

         import android.support.v7.app.AppCompatActivity;

         import android.view.View;

         import android.view.View.OnClickListener;

         import android.widget.DatePicker;

         import android.widget.TextView;

 import com.example.alimjan.hello_world.two.class__2_1_2;

 public class class_5_1_1 extends AppCompatActivity implements

         OnClickListener, OnDateSetListener {

     private TextView tv_date;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.code_5_1_1);

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

         findViewById(R.id.btn_date).setOnClickListener(this);

     }

     @Override

     public void onClick(View v) {

         if (v.getId() == R.id.btn_date) {

             Calendar calendar = Calendar.getInstance();

             DatePickerDialog dialog = new DatePickerDialog(this, this,

                     calendar.get(Calendar.YEAR),

                     calendar.get(Calendar.MONTH),

                     calendar.get(Calendar.DAY_OF_MONTH));

             dialog.show();

         }

     }

     @Override

     public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {

         String desc = String.format("您选择的日期是%d年%d月%d日",

                 year, monthOfYear+1, dayOfMonth);

         tv_date.setText(desc);

     }

     public static void startHome(Context mContext) {

         Intent intent = new Intent(mContext, class_5_1_1.class);

         mContext.startActivity(intent);

     }

 }

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="match_parent"

     android:layout_height="match_parent"

     android:orientation="vertical"

     android:padding="10dp" >

     <Button

         android:id="@+id/btn_date"

         android:layout_width="match_parent"

         android:layout_height="wrap_content"

         android:text="请选择日期"

         android:textColor="@color/black"

         android:textSize="20sp" />

     <TextView

         android:id="@+id/tv_date"

         android:layout_width="match_parent"

         android:layout_height="wrap_content"

         android:textColor="@color/black"

         android:textSize="17sp" />

 </LinearLayout>