/**
* Gets the fallback action to perform if the application does not handle the specified key.
*
* <p>When an application does not handle a particular key, the system may translate the key to an
* alternate fallback key (specified in the fallback action) and dispatch it to the application.
* The event containing the fallback key is flagged with {@link KeyEvent#FLAG_FALLBACK}.
*
* @param keyCode The key code.
* @param metaState The meta key modifier state.
* @param outFallbackAction The fallback action object to populate.
* @return True if a fallback action was found, false otherwise.
* @hide
*/
public boolean getFallbackAction(int keyCode, int metaState, FallbackAction outFallbackAction) {
if (outFallbackAction == null) {
throw new IllegalArgumentException("fallbackAction must not be null");
}
metaState = KeyEvent.normalizeMetaState(metaState);
return nativeGetFallbackAction(mPtr, keyCode, metaState, outFallbackAction);
}
/**
* Gets the first character in the character array that can be generated by the specified key
* code. If there are multiple choices, prefers the one that would be generated with the specified
* meta key modifier state.
*
* @param keyCode The key code.
* @param chars The array of matching characters to consider.
* @param metaState The preferred meta key modifier state.
* @return The matching associated character, or 0 if none.
*/
public char getMatch(int keyCode, char[] chars, int metaState) {
if (chars == null) {
throw new IllegalArgumentException("chars must not be null.");
}
metaState = KeyEvent.normalizeMetaState(metaState);
return nativeGetMatch(mPtr, keyCode, chars, metaState);
}
/**
* Gets the Unicode character generated by the specified key and meta key state combination.
*
* <p>Returns the Unicode character that the specified key would produce when the specified meta
* bits (see {@link MetaKeyKeyListener}) were active.
*
* <p>Returns 0 if the key is not one that is used to type Unicode characters.
*
* <p>If the return value has bit {@link #COMBINING_ACCENT} set, the key is a "dead key" that
* should be combined with another to actually produce a character -- see {@link #getDeadChar} --
* after masking with {@link #COMBINING_ACCENT_MASK}.
*
* @param keyCode The key code.
* @param metaState The meta key modifier state.
* @return The associated character or combining accent, or 0 if none.
*/
public int get(int keyCode, int metaState) {
metaState = KeyEvent.normalizeMetaState(metaState);
char ch = nativeGetCharacter(mPtr, keyCode, metaState);
int map = COMBINING.get(ch);
if (map != 0) {
return map;
} else {
return ch;
}
}