initial import of a timepicker preference widget

src/com/fsck/k9/preferences/TimePickerPreference.java

@@ -0,0 +1,140 @@
+/* Sourced from http://www.ebessette.com/d/TimePickerPreference
+ * on 2010-11-27 by jessev
+ */
+
+package com.fsck.k9.preferences;
+ 
+import android.content.Context;
+import android.preference.DialogPreference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.TimePicker;
+ 
+/**
+ * A preference type that allows a user to choose a time
+ */
+public class TimePickerPreference extends DialogPreference implements
+		TimePicker.OnTimeChangedListener {
+ 
+	/**
+	 * The validation expression for this preference
+	 */
+	private static final String VALIDATION_EXPRESSION = "[0-2]*[0-9]:[0-5]*[0-9]";
+ 
+	/**
+	 * The default value for this preference
+	 */
+	private String defaultValue;
+ 
+	/**
+	 * @param context
+	 * @param attrs
+	 */
+	public TimePickerPreference(Context context, AttributeSet attrs) {
+		super(context, attrs);
+		initialize();
+	}
+ 
+	/**
+	 * @param context
+	 * @param attrs
+	 * @param defStyle
+	 */
+	public TimePickerPreference(Context context, AttributeSet attrs,
+			int defStyle) {
+		super(context, attrs, defStyle);
+		initialize();
+	}
+ 
+	/**
+	 * Initialize this preference
+	 */
+	private void initialize() {
+		setPersistent(true);
+	}
+ 
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see android.preference.DialogPreference#onCreateDialogView()
+	 */
+	@Override
+	protected View onCreateDialogView() {
+ 
+		TimePicker tp = new TimePicker(getContext());
+		tp.setOnTimeChangedListener(this);
+ 
+		int h = getHour();
+		int m = getMinute();
+		if (h >= 0 && m >= 0) {
+			tp.setCurrentHour(h);
+			tp.setCurrentMinute(m);
+		}
+ 
+		return tp;
+	}
+ 
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * android.widget.TimePicker.OnTimeChangedListener#onTimeChanged(android
+	 * .widget.TimePicker, int, int)
+	 */
+	@Override
+	public void onTimeChanged(TimePicker view, int hour, int minute) {
+ 
+		persistString(hour + ":" + minute);
+	}
+ 
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see android.preference.Preference#setDefaultValue(java.lang.Object)
+	 */
+	@Override
+	public void setDefaultValue(Object defaultValue) {
+		// BUG this method is never called if you use the 'android:defaultValue' attribute in your XML preference file, not sure why it isn't		
+ 
+		super.setDefaultValue(defaultValue);
+ 
+		if (!(defaultValue instanceof String)) {
+			return;
+		}
+ 
+		if (!((String) defaultValue).matches(VALIDATION_EXPRESSION)) {
+			return;
+		}
+ 
+		this.defaultValue = (String) defaultValue;
+	}
+ 
+	/**
+	 * Get the hour value (in 24 hour time)
+	 * 
+	 * @return The hour value, will be 0 to 23 (inclusive)
+	 */
+	private int getHour() {
+		String time = getPersistedString(this.defaultValue);
+		if (time == null || !time.matches(VALIDATION_EXPRESSION)) {
+			return -1;
+		}
+ 
+		return Integer.valueOf(time.split(":")[0]);
+	}
+ 
+	/**
+	 * Get the minute value
+	 * 
+	 * @return the minute value, will be 0 to 59 (inclusive)
+	 */
+	private int getMinute() {
+		String time = getPersistedString(this.defaultValue);
+		if (time == null || !time.matches(VALIDATION_EXPRESSION)) {
+			return -1;
+		}
+ 
+		return Integer.valueOf(time.split(":")[1]);
+	}
+}
+