DatePickerDialog日期选择器的使用

DatePickerDialog是在安卓系统3.0以后使用的，要使用呢，首先写一个类继承DialogFragment，实现DatePickerDialog.OnDateSetListener的接口，配合Calendar这个类使用



代码如下：

package com.huang.datepickerdalog;

import java.util.Calendar;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.FragmentManager;
import android.os.Bundle;
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 {

private static final int UPDATE = 1;
private TextView mTextView;
private Button mbButton;
private static int mYear;
private static int mMonth;
private static int mDay;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findView();
Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
updateDisplay();

}

private void updateDisplay() {
StringBuffer s = new StringBuffer().append(pad(mYear)).append("-")

.append(pad(mMonth+1)).append("-").append(pad(mDay));

mTextView.setText(s);

}

private void findView() {
mTextView = (TextView) findViewById(R.id.textView1);
mbButton = (Button) findViewById(R.id.button1);
mbButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
MydatePickerDialog dialog = new MydatePickerDialog();
FragmentManager fm = getFragmentManager();
dialog.show(fm, "pickerDialog");

}
});
}

/**
* 若数字大于10，直接显示，否则显示0c 如：18则显示为18，8则显示08
*
* @param c
* @return
*/
private static String pad(int c) {
if (c >= 10) {
return String.valueOf(c);
} else {
return "0" + String.valueOf(c);
}
}

public static class MydatePickerDialog extends DialogFragment implements
DatePickerDialog.OnDateSetListener {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
DatePickerDialog datePickerDialog = new DatePickerDialog(
getActivity(), this, mYear, mMonth, mDay);
return datePickerDialog;
}

@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;

}

}
}

布局文件

<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"
tools:context="com.huang.datepickerdalog.MainActivity" >

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView1"
android:layout_marginLeft="20dp"
android:text="Button" />

</RelativeLayout>