android.util.Config#LOGD源码实例Demo

/**
    * Checks whether this looks like a legitimate selection parameter
    */
   public static void validateSelection(String selection,
    Set<String> allowedColumns) {
try {
    if (selection == null || selection.length() == 0) {
	return;
    }
    Lexer lexer = new Lexer(selection, allowedColumns);
    parseExpression(lexer);
    if (lexer.currentToken() != Lexer.TOKEN_END) {
	throw new IllegalArgumentException("syntax error");
    }
} catch (RuntimeException ex) {
    if (Constants.LOGV) {
	Log.d(Constants.TAG, "invalid selection [" + selection
		+ "] triggered " + ex);
    } else if (Config.LOGD) {
	Log.d(Constants.TAG, "invalid selection triggered " + ex);
    }
    throw ex;
}

   }
 

@Override
public final void onClick(View v) {
    final long lastClickTime = mLastClickTime;
    final long now = SystemClock.uptimeMillis(); //guaranteed 100% monotonic

    if (now - lastClickTime < MIN_DELAY_MS && !override) {
        // Too fast: ignore
        if (Config.LOGD) {
            Log.d(TAG, "onClick Clicked too quickly: ignored");
        }
    } else {
        override = false;
        // Update mLastClickTime and register the click
        mLastClickTime = now;
        onSingleClick(v);
    }
}