本文概述
Android DatePicker是用于选择日期的小部件。它允许你按日,月和年选择日期。与DatePicker一样,android也提供TimePicker选择时间。
android.widget.DatePicker是FrameLayout类的子类。
Android DatePicker示例
让我们看看android中的datepicker小部件的简单示例。
activity_main.xml
文件:activity_main.xml
<?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="example.srcmini02.com.datepicker.MainActivity">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/button1"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginBottom="102dp"
android:layout_marginLeft="30dp"
android:layout_marginStart="30dp"
android:text="" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="20dp"
android:text="Change Date" />
<DatePicker
android:id="@+id/datePicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginBottom="36dp" />
</RelativeLayout>
活动类
文件:MainActivity.java
package example.srcmini02.com.datepicker;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
DatePicker picker;
Button displayDate;
TextView textview1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textview1=(TextView)findViewById(R.id.textView1);
picker=(DatePicker)findViewById(R.id.datePicker);
displayDate=(Button)findViewById(R.id.button1);
textview1.setText("Current Date: "+getCurrentDate());
displayDate.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
textview1.setText("Change Date: "+getCurrentDate());
}
});
}
public String getCurrentDate(){
StringBuilder builder=new StringBuilder();;
builder.append((picker.getMonth() + 1)+"/");//month is 0 based
builder.append(picker.getDayOfMonth()+"/");
builder.append(picker.getYear());
return builder.toString();
}
}