日期設定調整

1.UI的xml

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="" />

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/textView1"

        android:layout_below="@+id/textView1"

        android:text="日期設定" />

</RelativeLayout>

2.主程式程式碼

import java.util.Calendar;

import android.os.Bundle;

import android.app.Activity;

import android.app.DatePickerDialog;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.DatePicker;

import android.widget.TextView;

public class MainActivity extends Activity {

Button btn;

TextView tv;

private int year, month, date;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

btn = (Button) this.findViewById(R.id.button1);

tv = (TextView) this.findViewById(R.id.textView1);

setDate();

btn.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {

setDatePickerDialog();

}

});

}

public void setDatePickerDialog() {

DatePickerDialog log = new DatePickerDialog(MainActivity.this, 1,

new DatePickerDialog.OnDateSetListener() {

@Override

public void onDateSet(DatePicker arg0, int year, int month,int date) {

MainActivity.this.year = year;

MainActivity.this.month = month+1;

MainActivity.this.date = date;

tv.setText(MainActivity.this.year + "-"

+ (MainActivity.this.month < 10 ? "0" + MainActivity.this.month :MainActivity.this.month) + "-"

+ (MainActivity.this.date < 10 ? "0" + MainActivity.this.date : MainActivity.this.date));

}

}, year, month, date);

log.show();

}

public void setDate() {

Calendar calendar = Calendar.getInstance();

year = calendar.get(Calendar.YEAR);

month = calendar.get(Calendar.MONTH);

date = calendar.get(Calendar.DATE);

tv.setText(year + "-" + (month < 10 ? "0" + (month+1) : (month+1)) + "-"

+ (date < 10 ? "0" + date : date));

}

}