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DateSorter.javaAPI DocAndroid 1.5 API3882Wed May 06 22:41:56 BST 2009android.webkit

DateSorter

public class DateSorter extends Object
Sorts dates into the following groups: Today Yesterday five days ago one month ago older than a month ago

Fields Summary
private static final String
LOGTAG
public static final int
DAY_COUNT
must be >= 3
private long[]
mBins
private String[]
mLabels
private static final int
NUM_DAYS_AGO
Date
mDate
Calendar
mCal
Constructors Summary
public DateSorter(android.content.Context context)

param
context Application context


             
       
        Resources resources = context.getResources();

        Calendar c = Calendar.getInstance();
        beginningOfDay(c);
        
        // Create the bins
        mBins[0] = c.getTimeInMillis(); // Today
        c.roll(Calendar.DAY_OF_YEAR, -1);
        mBins[1] = c.getTimeInMillis();  // Yesterday
        c.roll(Calendar.DAY_OF_YEAR, -(NUM_DAYS_AGO - 1));
        mBins[2] = c.getTimeInMillis();  // Five days ago
        c.roll(Calendar.DAY_OF_YEAR, NUM_DAYS_AGO); // move back to today
        c.roll(Calendar.MONTH, -1);
        mBins[3] = c.getTimeInMillis();  // One month ago
        c.roll(Calendar.MONTH, -1);
        mBins[4] = c.getTimeInMillis();  // Over one month ago

        // build labels
        mLabels[0] = context.getText(com.android.internal.R.string.today).toString();
        mLabels[1] = context.getText(com.android.internal.R.string.yesterday).toString();

        int resId = com.android.internal.R.plurals.num_days_ago;
        String format = resources.getQuantityString(resId, NUM_DAYS_AGO);
        mLabels[2] = String.format(format, NUM_DAYS_AGO);

        mLabels[3] = context.getText(com.android.internal.R.string.oneMonthDurationPast).toString();
        mLabels[4] = context.getText(com.android.internal.R.string.beforeOneMonthDurationPast)
                .toString();
Methods Summary
private java.util.CalendarbeginningOfDay(java.util.Calendar c)
Calcuate 12:00am by zeroing out hour, minute, second, millisecond

        c.set(Calendar.HOUR_OF_DAY, 0);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MILLISECOND, 0);
        return c;
public longgetBoundary(int index)

param
index date bin index as returned by getIndex()
return
date boundary at given index

        return mBins[index];
public intgetIndex(long time)

param
time time since the Epoch in milliseconds, such as that returned by Calendar.getTimeInMillis()
return
an index from 0 to (DAY_COUNT - 1) that identifies which date bin this date belongs to

        // Lame linear search
        for (int i = 0; i < DAY_COUNT; i++) {
            if (time > mBins[i]) return i;
        }
        return DAY_COUNT - 1;
public java.lang.StringgetLabel(int index)

param
index date bin index as returned by getIndex()
return
string label suitable for display to user

        return mLabels[index];