com.jjoe64.graphview.helper

Class DateAsXAxisLabelFormatter

java.lang.Object

com.jjoe64.graphview.DefaultLabelFormatter

com.jjoe64.graphview.helper.DateAsXAxisLabelFormatter

All Implemented Interfaces:

LabelFormatter

public class DateAsXAxisLabelFormatter
extends DefaultLabelFormatter

Helper class to use date objects as x-values. This will use your own Date Format or by default the Android default date format to convert the x-values (that has to be millis from 01-01-1970) into a formatted date string. See the DateAsXAxis example in the GraphView-Demos project to see a working example.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Calendar	mCalendar calendar to avoid creating new date objects
protected java.text.DateFormat	mDateFormat the date format that will convert the unix timestamp to string

Fields inherited from class com.jjoe64.graphview.DefaultLabelFormatter

mNumberFormatter, mViewport

Constructor Summary

Constructors

Constructor and Description
DateAsXAxisLabelFormatter(Context context) create the formatter with the Android default date format to convert the x-values.
DateAsXAxisLabelFormatter(Context context, java.text.DateFormat dateFormat) create the formatter with your own custom date format to convert the x-values.

Method Summary

Modifier and Type	Method and Description
java.lang.String	formatLabel(double value, boolean isValueX) formats the x-values as date string.

Methods inherited from class com.jjoe64.graphview.DefaultLabelFormatter

setViewport

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mDateFormat

protected final java.text.DateFormat mDateFormat

the date format that will convert the unix timestamp to string

mCalendar

protected final java.util.Calendar mCalendar

calendar to avoid creating new date objects

Constructor Detail

DateAsXAxisLabelFormatter

public DateAsXAxisLabelFormatter(Context context)

create the formatter with the Android default date format to convert the x-values.

Parameters:

context - the application context

DateAsXAxisLabelFormatter

public DateAsXAxisLabelFormatter(Context context,
                                 java.text.DateFormat dateFormat)

create the formatter with your own custom date format to convert the x-values.

Parameters:

context - the application context

dateFormat - custom date format

Method Detail

formatLabel

public java.lang.String formatLabel(double value,
                                    boolean isValueX)

formats the x-values as date string.

Specified by:

formatLabel in interface LabelFormatter

Overrides:

formatLabel in class DefaultLabelFormatter

Parameters:

value - raw value

isValueX - true if it's a x value, otherwise false

Returns:

value converted to string