/**

     * if the package is already installed.

     * 程序已经存在

     */

    public static final int INSTALL_FAILED_ALREADY_EXISTS = -1;

    /**

     * if the package archive file is invalid.

     * 无效的APK

     */

    public static final int INSTALL_FAILED_INVALID_APK = -2;

    /**

     * if the URI passed in is invalid.

     * 无效的链接

     */

    public static final int INSTALL_FAILED_INVALID_URI = -3;

    /**

     * if the package manager service found that the device

     *   didn't have enough storage space to install the app.

     * 没有足够的存储空间

     */

    public static final int INSTALL_FAILED_INSUFFICIENT_STORAGE = -4;

    /**

     * if a package is already installed with the same name.

     * 已存在同名程序

     */

    public static final int INSTALL_FAILED_DUPLICATE_PACKAGE = -5;

    /**

     * if the requested shared user does not exist.

     * 共享用户不存在

     */

    public static final int INSTALL_FAILED_NO_SHARED_USER = -6;

    /**

     * if a previously installed package of the same name has a different signature

     *   than the new package (and the old package's data was not removed).

     * 更新不兼容

     */

    public static final int INSTALL_FAILED_UPDATE_INCOMPATIBLE = -7;

    /**

     * if the new package is requested a shared user which is already installed

     *   on the device and does not have matching signature.

     * 共享用户不兼容

     */

    public static final int INSTALL_FAILED_SHARED_USER_INCOMPATIBLE = -8;

    /**

     * if the new package uses a shared library that is not available.

     * 共享库已丢失

     */

    public static final int INSTALL_FAILED_MISSING_SHARED_LIBRARY = -9;

    /**

     * if the new package uses a shared library that is not available.

     * 替换时无法删除

     */

    public static final int INSTALL_FAILED_REPLACE_COULDNT_DELETE = -10;

    /**

     * if the new package failed while optimizing and validating its dex files,

     *   either because there was not enough storage or the validation failed.

     * 空间不足或验证失败

     */

    public static final int INSTALL_FAILED_DEXOPT = -11;

    /**

     * if the new package failed because the current SDK version is older than

     * that required by the package.

     * 系统版本过旧

     */

    public static final int INSTALL_FAILED_OLDER_SDK = -12;

    /**

     * if the new package failed because it contains a content provider with the

     *   same authority as a provider already installed in the system.

     * 存在同名的内容提供者

     */

    public static final int INSTALL_FAILED_CONFLICTING_PROVIDER = -13;

    /**

     * if the new package failed because the current SDK version is newer than

     *   that required by the package.

     * 系统版本过新

     */

    public static final int INSTALL_FAILED_NEWER_SDK = -14;

    /**

     * if the new package failed because it has specified that it is a test-only

     *   package and the caller has not supplied the {@link #INSTALL_ALLOW_TEST}

     *   flag.

     * 调用者不被允许测试的测试程序

     */

    public static final int INSTALL_FAILED_TEST_ONLY = -15;

    /**

     * if the package being installed contains native code, but none that is

     *   compatible with the the device's CPU_ABI.

     * 包含的本机代码不兼容CPU_ABI

     */

    public static final int INSTALL_FAILED_CPU_ABI_INCOMPATIBLE = -16;

    /**

     * if the new package uses a feature that is not available.

     * 使用了一个无效的特性

     */

    public static final int INSTALL_FAILED_MISSING_FEATURE = -17;

// ------ Errors related to sdcard

    /**

     * if a secure container mount point couldn't be accessed on external media.

     * SD卡访问失败

     */

    public static final int INSTALL_FAILED_CONTAINER_ERROR = -18;

    /**

     * if the new package couldn't be installed in the specified install location.

     * 无效的安装路径

     */

    public static final int INSTALL_FAILED_INVALID_INSTALL_LOCATION = -19;

    /**

     * if the new package couldn't be installed in the specified install

     *   location because the media is not available.

     * SD卡不可用

     */

    public static final int INSTALL_FAILED_MEDIA_UNAVAILABLE = -20;

    /**

     * if the new package couldn't be installed because the verification timed out.

     * 验证超时

     */

    public static final int INSTALL_FAILED_VERIFICATION_TIMEOUT = -21;

    /**

     * if the new package couldn't be installed because the verification did not succeed.

     * 验证失败

     */

    public static final int INSTALL_FAILED_VERIFICATION_FAILURE = -22;

    /**

     * if the package changed from what the calling program expected.

     * 预期的应用被改变

     */

    public static final int INSTALL_FAILED_PACKAGE_CHANGED = -23;

    /**

     * if the parser was given a path that is not a file, or does not end

     *   with the expected '.apk' extension.

     * 解析失败，不是APK

     */

    public static final int INSTALL_PARSE_FAILED_NOT_APK = -100;

    /**

     * if the parser was unable to retrieve the AndroidManifest.xml file.

     * 解析失败，无法提取Manifest

     */

    public static final int INSTALL_PARSE_FAILED_BAD_MANIFEST = -101;

    /**

     * if the parser encountered an unexpected exception.

     * 解析失败，无法预期的异常

     */

    public static final int INSTALL_PARSE_FAILED_UNEXPECTED_EXCEPTION = -102;

    /**

     * if the parser did not find any certificates in the .apk.

     * 解析失败，找不到证书

     */

    public static final int INSTALL_PARSE_FAILED_NO_CERTIFICATES = -103;

    /**

     * if the parser found inconsistent certificates on the files in the .apk.

     * 解析失败，证书不一致

     */

    public static final int INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES = -104;

    /**

     * if the parser encountered a CertificateEncodingException in one of the

     *   files in the .apk.

     * 解析失败，证书编码异常

     */

    public static final int INSTALL_PARSE_FAILED_CERTIFICATE_ENCODING = -105;

    /**

     * if the parser encountered a bad or missing package name in the manifest.

     * 解析失败，manifest中的包名错误或丢失

     */

    public static final int INSTALL_PARSE_FAILED_BAD_PACKAGE_NAME = -106;

    /**

     * if the parser encountered a bad shared user id name in the manifest.

     * 解析失败，manifest中的共享用户错误

     */

    public static final int INSTALL_PARSE_FAILED_BAD_SHARED_USER_ID = -107;

    /**

     * if the parser encountered some structural problem in the manifest.

     * 解析失败，manifest中出现结构性错误

     */

    public static final int INSTALL_PARSE_FAILED_MANIFEST_MALFORMED = -108;

    /**

     * if the parser did not find any actionable tags (instrumentation or application)

     *   in the manifest.

     * 解析失败，manifest中没有actionable tags

     */

    public static final int INSTALL_PARSE_FAILED_MANIFEST_EMPTY = -109;

    /**

     * if the system failed to install the package because of system issues.

     * 系统问题导致安装失败

     */

    public static final int INSTALL_FAILED_INTERNAL_ERROR = -110;