运行时出现错误 110

Question

我收到以下错误：

frameworks/base/core/java/android/os/mypackage/MyServiceListenerClass.java:283: error 110: Parameter of unavailable type android.os.storage.VolumeInfo in android.os.mypackage.MyServiceListenerClass.myMethod()

我创建了一个包含一些类的新包，而那些类使用 storage 包中的 VolumeInfo。

我找不到关于此错误的任何文档。我做错了什么？

更新：

发现Error 110 = UNAVAILABLE_SYMBOL.

在 doclava/Stubs 中找到此部分。java:

for (ParameterInfo p :  m.parameters()) {
    TypeInfo t = p.type();
    if (!t.isPrimitive()) {
      hiddenClass = findHiddenClasses(t);
      if (null != hiddenClass) {
        if (hiddenClass.qualifiedName() == t.asClassInfo().qualifiedName()) {
          // Parameter type is hidden
          Errors.error(Errors.UNAVAILABLE_SYMBOL, m.position(),
              "Parameter of unavailable type " + t.fullName() + " in " + cl.qualifiedName()
              + "." + m.name() + "()");
        } else {
          // Parameter type contains a generic parameter
          Errors.error(Errors.HIDDEN_TYPE_PARAMETER, m.position(),
              "Parameter uses type parameter of unavailable type " + t.fullName() + " in "
              + cl.qualifiedName() + "." + m.name() + "()");
        }
      }
    }
}

Answer 1

所以这个错误的原因是 VolumInfo 文档部分底部的 @hide 属性：

/**
 * Information about a storage volume that may be mounted. A volume may be a
 * partition on a physical {@link DiskInfo}, an emulated volume above some other
 * storage medium, or a standalone container like an ASEC or OBB.
 * <p>
 * Volumes may be mounted with various flags:
 * <ul>
 * <li>{@link #MOUNT_FLAG_PRIMARY} means the volume provides primary external
 * storage, historically found at {@code /sdcard}.
 * <li>{@link #MOUNT_FLAG_VISIBLE} means the volume is visible to third-party
 * apps for direct filesystem access. The system should send out relevant
 * storage broadcasts and index any media on visible volumes. Visible volumes
 * are considered a more stable part of the device, which is why we take the
 * time to index them. In particular, transient volumes like USB OTG devices
 * <em>should not</em> be marked as visible; their contents should be surfaced
 * to apps through the Storage Access Framework.
 * </ul>
 *
 * @hide
 */

删除它可以解决问题。

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运行时出现错误 110