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MultiTapKeyListener.javaAPI DocAndroid 1.5 API9827Wed May 06 22:41:56 BST 2009android.text.method

MultiTapKeyListener

public class MultiTapKeyListener extends BaseKeyListener implements SpanWatcher
This is the standard key listener for alphabetic input on 12-key keyboards. You should generally not need to instantiate this yourself; TextKeyListener will do it for you.

Fields Summary
private static MultiTapKeyListener[]
sInstance
private static final android.util.SparseArray
sRecs
private android.text.method.TextKeyListener.Capitalize
mCapitalize
private boolean
mAutoText
Constructors Summary
public MultiTapKeyListener(android.text.method.TextKeyListener.Capitalize cap, boolean autotext)


     
        sRecs.put(KeyEvent.KEYCODE_1,     ".,1!@#$%^&*:/?'=()");
        sRecs.put(KeyEvent.KEYCODE_2,     "abc2ABC");
        sRecs.put(KeyEvent.KEYCODE_3,     "def3DEF");
        sRecs.put(KeyEvent.KEYCODE_4,     "ghi4GHI");
        sRecs.put(KeyEvent.KEYCODE_5,     "jkl5JKL");
        sRecs.put(KeyEvent.KEYCODE_6,     "mno6MNO");
        sRecs.put(KeyEvent.KEYCODE_7,     "pqrs7PQRS");
        sRecs.put(KeyEvent.KEYCODE_8,     "tuv8TUV");
        sRecs.put(KeyEvent.KEYCODE_9,     "wxyz9WXYZ");
        sRecs.put(KeyEvent.KEYCODE_0,     "0+");
        sRecs.put(KeyEvent.KEYCODE_POUND, " ");
    
        mCapitalize = cap;
        mAutoText = autotext;
Methods Summary
public intgetInputType()

        return makeTextContentType(mCapitalize, mAutoText);
public static android.text.method.MultiTapKeyListenergetInstance(boolean autotext, android.text.method.TextKeyListener.Capitalize cap)
Returns a new or existing instance with the specified capitalization and correction properties.

        int off = cap.ordinal() * 2 + (autotext ? 1 : 0);

        if (sInstance[off] == null) {
            sInstance[off] = new MultiTapKeyListener(cap, autotext);
        }

        return sInstance[off];
public booleanonKeyDown(android.view.View view, Editable content, int keyCode, android.view.KeyEvent event)

        int selStart, selEnd;
        int pref = 0;

        if (view != null) {
            pref = TextKeyListener.getInstance().getPrefs(view.getContext());
        }

        {
            int a = Selection.getSelectionStart(content);
            int b = Selection.getSelectionEnd(content);

            selStart = Math.min(a, b);
            selEnd = Math.max(a, b);
        }

        int activeStart = content.getSpanStart(TextKeyListener.ACTIVE);
        int activeEnd = content.getSpanEnd(TextKeyListener.ACTIVE);

        // now for the multitap cases...

        // Try to increment the character we were working on before
        // if we have one and it's still the same key.

        int rec = (content.getSpanFlags(TextKeyListener.ACTIVE)
                    & Spannable.SPAN_USER) >>> Spannable.SPAN_USER_SHIFT;

        if (activeStart == selStart && activeEnd == selEnd &&
            selEnd - selStart == 1 &&
            rec >= 0 && rec < sRecs.size()) {
            if (keyCode == KeyEvent.KEYCODE_STAR) {
                char current = content.charAt(selStart);

                if (Character.isLowerCase(current)) {
                    content.replace(selStart, selEnd,
                                    String.valueOf(current).toUpperCase());
                    removeTimeouts(content);
                    Timeout t = new Timeout(content);

                    return true;
                }
                if (Character.isUpperCase(current)) {
                    content.replace(selStart, selEnd,
                                    String.valueOf(current).toLowerCase());
                    removeTimeouts(content);
                    Timeout t = new Timeout(content);

                    return true;
                }
            }

            if (sRecs.indexOfKey(keyCode) == rec) {
                String val = sRecs.valueAt(rec);
                char ch = content.charAt(selStart);
                int ix = val.indexOf(ch);

                if (ix >= 0) {
                    ix = (ix + 1) % (val.length());

                    content.replace(selStart, selEnd, val, ix, ix + 1);
                    removeTimeouts(content);
                    Timeout t = new Timeout(content);

                    return true;
                }
            }

            // Is this key one we know about at all?  If so, acknowledge
            // that the selection is our fault but the key has changed
            // or the text no longer matches, so move the selection over
            // so that it inserts instead of replaces.

            rec = sRecs.indexOfKey(keyCode);

            if (rec >= 0) {
                Selection.setSelection(content, selEnd, selEnd);
                selStart = selEnd;
            }
        } else {
            rec = sRecs.indexOfKey(keyCode);
        }

        if (rec >= 0) {
            // We have a valid key.  Replace the selection or insertion point
            // with the first character for that key, and remember what
            // record it came from for next time.

            String val = sRecs.valueAt(rec);

            int off = 0;
            if ((pref & TextKeyListener.AUTO_CAP) != 0 &&
                TextKeyListener.shouldCap(mCapitalize, content, selStart)) {
                for (int i = 0; i < val.length(); i++) {
                    if (Character.isUpperCase(val.charAt(i))) {
                        off = i;
                        break;
                    }
                }
            }

            if (selStart != selEnd) {
                Selection.setSelection(content, selEnd);
            }

            content.setSpan(OLD_SEL_START, selStart, selStart,
                            Spannable.SPAN_MARK_MARK);

            content.replace(selStart, selEnd, val, off, off + 1);

            int oldStart = content.getSpanStart(OLD_SEL_START);
            selEnd = Selection.getSelectionEnd(content);

            if (selEnd != oldStart) {
                Selection.setSelection(content, oldStart, selEnd);

                content.setSpan(TextKeyListener.LAST_TYPED, 
                                oldStart, selEnd,
                                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

                content.setSpan(TextKeyListener.ACTIVE,
                            oldStart, selEnd,
                            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE |
                            (rec << Spannable.SPAN_USER_SHIFT));

            }

            removeTimeouts(content);
            Timeout t = new Timeout(content);

            // Set up the callback so we can remove the timeout if the
            // cursor moves.

            if (content.getSpanStart(this) < 0) {
                KeyListener[] methods = content.getSpans(0, content.length(),
                                                    KeyListener.class);
                for (Object method : methods) {
                    content.removeSpan(method);
                }
                content.setSpan(this, 0, content.length(),
                                Spannable.SPAN_INCLUSIVE_INCLUSIVE);
            }

            return true;
        }

        return super.onKeyDown(view, content, keyCode, event);
public voidonSpanAdded(Spannable s, java.lang.Object what, int start, int end)
public voidonSpanChanged(Spannable buf, java.lang.Object what, int s, int e, int start, int stop)

        if (what == Selection.SELECTION_END) {
            buf.removeSpan(TextKeyListener.ACTIVE);
            removeTimeouts(buf);
        }
public voidonSpanRemoved(Spannable s, java.lang.Object what, int start, int end)
private static voidremoveTimeouts(Spannable buf)

        Timeout[] timeout = buf.getSpans(0, buf.length(), Timeout.class);

        for (int i = 0; i < timeout.length; i++) {
            Timeout t = timeout[i];

            t.removeCallbacks(t);
            t.mBuffer = null;
            buf.removeSpan(t);
        }