RingtoneSelectionPreference.java 文件源码

private int getRequestCodeViaReflection() {
    try {
        // Get request code field by reflection
        Field field = android.preference.RingtonePreference.class.getDeclaredField("mRequestCode");

        // Make it accessible
        field.setAccessible(true);

        // Return it
        return (Integer) field.get(this);
    }
    catch (Exception exc) {
        // Log it
        Log.e(Logging.TAG, "Request code reflection failed", exc);

        // Return error
        return REQUEST_CODE_FAILED;
    }
}