android - 如何覆盖/修改 sdk 中的值或方法？

Question

我想修改SDK中Notification.class中一个int的值。这可能吗？这可以实现吗？ 这是我要修改的整数，覆盖:

public class Notification implements Parcelable {
.......
    /**
 * Maximum length of CharSequences accepted by Builder and friends.
 *
 * <p>
 * Avoids spamming the system with overly large strings such as full e-mails.
 */
private static final int MAX_CHARSEQUENCE_LENGTH = 10 * 1024;

/**

...或者，我想从同一个类中覆盖此方法:

    /**
 * Make sure this CharSequence is safe to put into a bundle, which basically
 * means it had better not be some custom Parcelable implementation.
 * @hide
 */
public static CharSequence safeCharSequence(CharSequence cs) {
    if (cs == null) return cs;
    if (cs.length() > MAX_CHARSEQUENCE_LENGTH) {

        cs = cs.subSequence(0, MAX_CHARSEQUENCE_LENGTH);
    }
    if (cs instanceof Parcelable) {
        Log.e(TAG, "warning: " + cs.getClass().getCanonicalName()
                + " instance is a custom Parcelable and not allowed in Notification");
        return cs.toString();
    }
    return removeTextSizeSpans(cs);
}

Answer 1

Is this possible?

在您自己的自定义 ROM 中？是的。

在 Android 应用中？不。更准确地说，您无法通过您的应用程序影响 safeCharSequence()，除非是在已获得 root 权限的设备上。