android datepicker例子 androiddatepicker|Android

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Android DatePicker示例

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【android datepicker例子】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.srcmini.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.srcmini.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(); } }

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