Android入门之DatePicker(纯Java)
Android入门之DatePicker(纯Java)
- import java.util.Calendar;
- import java.util.TimeZone;
- import Android.app.Activity;
- import android.os.Bundle;
- import android.widget.*;
- import android.widget.DatePicker.OnDateChangedListener;
- public class DatePickerTest extends Activity {
- private LinearLayout mainLayout=null; //定义一个容器,用于盛放DatePicker和TextView
- private TextView tv=null; //定义一个TextView,用于显示操作结果
- private DatePicker dp=null; //定义一个DatePicker
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- mainLayout_init();
- setContentView(mainLayout);
- }
- /*mainLayout初始化*/
- void mainLayout_init(){
- mainLayout=new LinearLayout(this);
- LinearLayout.LayoutParams lp=new LinearLayout.LayoutParams(-1, -1);
- mainLayout.setLayoutParams(lp);
- mainLayout.setOrientation(LinearLayout.VERTICAL);
- tv_init();
- dp_init();
- mainLayout.addView(dp);
- mainLayout.addView(tv);
- }
- /*tv初始化*/
- void tv_init(){
- tv=new TextView(this);
- tv.setText("这里显示结果");
- }
- /*dp初始化*/
- void dp_init(){
- dp=new DatePicker(this);
- //日期更改监听
- OnDateChangedListener odcl=new OnDateChangedListener(){
- public void onDateChanged(DatePicker view, int year,int monthOfYear, int dayOfMonth) {
- tv.setText("你选择了年:"+year+"\n");
- //注:Calendar和DatePicker中的月份的值都是从0到11,与我们习惯不同
- tv.append("你选择了月:"+(monthOfYear+1)+"\n");
- tv.append("你选择了日:"+dayOfMonth+"\n");
- }
- };
- //通过Calendar获取当前年月日
- Calendar calendar=Calendar.getInstance(TimeZone.getDefault());
- int year=calendar.get(Calendar.YEAR);
- int month=calendar.get(Calendar.MONTH);
- int day=calendar.get(Calendar.DAY_OF_MONTH);
- //设定dp初始值为当前日期,绑定监听
- dp.init(year, month, day, odcl);
- }
- }
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