Launcher.java 文件源码

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    final int uniChar = event.getUnicodeChar();
    final boolean handled = super.onKeyDown(keyCode, event);
    final boolean isKeyNotWhitespace = uniChar > 0
            && !Character.isWhitespace(uniChar);
    if (!handled && acceptFilter() && isKeyNotWhitespace) {
        boolean gotKey = TextKeyListener.getInstance().onKeyDown(
                mWorkspace, mDefaultKeySsb, keyCode, event);
        if (gotKey && mDefaultKeySsb != null && mDefaultKeySsb.length() > 0) {

            return onSearchRequested();
        }
    }

    if (keyCode == KeyEvent.KEYCODE_MENU && event.isLongPress()) {
        return true;
    }

    return handled;
}