Hello, Views (Time Picker編)

Time Picker | Android Developers

http://developer.android.com/intl/ja/resources/tutorials/views/hello-timepicker.html DatePickerと同じタイプの、時刻を選択するウィジェットです。
HelloTimePickerというプロジェクトを作成します。
res/values/strings.xmlを開き、以下のように変更します。

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<?xml version="1.0" encoding="utf-8"?> <resources>       <string name="hello">Hello World, HelloTimePickerActivity!</string>     <string name="app_name">HelloTimePicker</string>     <string name="pick_time">Change the time</string>   </resources>

res/layout/main.xmlを開き、以下のように変更します。

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:orientation="vertical">     <TextView android:id="@+id/timeDisplay"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text=""/>     <Button android:id="@+id/pickTime"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/pick_time"/> </LinearLayout>

HelloTimePickerActivity.javaを開き、以下のように変更します。

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package com.blogspot.logroid.helloTimePicker;   import java.util.Calendar;   import android.app.Activity; import android.app.Dialog; import android.app.TimePickerDialog; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.TimePicker;   public class HelloTimePickerActivity extends Activity {           private TextView mTimeDisplay;     private Button mPickTime;       private int mHour;     private int mMinute;       static final int TIME_DIALOG_ID = 0;           /** Called when the activity is first created. */     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);           // capture our View elements         mTimeDisplay = (TextView) findViewById(R.id.timeDisplay);         mPickTime = (Button) findViewById(R.id.pickTime);           // add a click listener to the button         mPickTime.setOnClickListener(new View.OnClickListener() {             public void onClick(View v) {                 showDialog(TIME_DIALOG_ID);             }         });           // get the current time         final Calendar c = Calendar.getInstance();         mHour = c.get(Calendar.HOUR_OF_DAY);         mMinute = c.get(Calendar.MINUTE);           // display the current date         updateDisplay();     }           // updates the time we display in the TextView     private void updateDisplay() {         mTimeDisplay.setText(             new StringBuilder()                     .append(pad(mHour)).append(":")                     .append(pad(mMinute)));     }       private static String pad(int c) {         if (c >= 10)             return String.valueOf(c);         else             return "0" + String.valueOf(c);     }           // the callback received when the user "sets" the time in the dialog     private TimePickerDialog.OnTimeSetListener mTimeSetListener =         new TimePickerDialog.OnTimeSetListener() {             public void onTimeSet(TimePicker view, int hourOfDay, int minute) {                 mHour = hourOfDay;                 mMinute = minute;                 updateDisplay();             }         };           @Override     protected Dialog onCreateDialog(int id) {         switch (id) {         case TIME_DIALOG_ID:             return new TimePickerDialog(this,                     mTimeSetListener, mHour, mMinute, false);         }         return null;     } }

実行します。

今回出てきたキーワードについて解説。

ソースはDate Pickerの時と殆ど同じなので、重複箇所は割愛します。

TimePickerDialog

時刻選択ダイアログ

OnTimeSetListener

TimePickerのダイアログの値変更時に呼び出されるイベントリスナ―

onTimeSet

「設定」ボタンがタップされた時に呼ばれるメソッド