1.從源碼中找到 簽名文件，簽名然後安裝 報：
PackageManager.INSTALL_FAILED_SHARED_USER_INCOMPATIBLE
問賣家技術人員不知道問百度...
2.百度全都是教你怎麼簽名的，去官網找...原文：
These keys are used to sign applications separately for release images and are not used by the Android build system. The build system signs packages with the testkeys provided by default in build/target/product/security/, but this setting can be overwritten by specifying another path to PRODUCT_DEFAULT_DEV_CERTIFICATE.
In our builds, we use the keys located under device/fsl/common/security/ as specified in device/fsl/imx6/imx6.mk. Because those keys are part of a publicly available source tree, they should never be used for production devices. Instead, you should generate your own private keys for building your production images.
大概意思就是android 系統簽名文件在 build/target/product/security/這個目錄，但imx6 的簽名目錄是在device/fsl/common/security/ .如果想改變可以修改device/fsl/imx6/imx6.mk 裏面的 PRODUCT_DEFAULT_DEV_CERTIFICATE 值，也可以在/build/core/config.mk改.