问：为什么写？

答：网上搜出来的都试过了，不行！下面直接上代码和注意事项！

首先到这个目录（/RK3568/Rockchip_Android13_SDK_Release/device/rockchip/rk356x/tl3568_evm/preinstall）下创建SogouIME文件夹，在SogouIME中添加如下内容

1.apk从哪里来的？网上随便下载的

2.Android.mk内容如下，lib/arm64-v8a/里面的内容不用照搬，因为你跟我下的搜狗的app肯定不是一个版本的，自己想办法把自己那版的so文件写上去

LOCAL_PATH := $(my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := SogouIME
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_PATH := $(TARGET_OUT_ODM)/bundled_persist-app
LOCAL_REPLACE_PREBUILT_APK_INSTALLED := $(LOCAL_PATH)/SogouIME.apk
LOCAL_CERTIFICATE := PRESIGNED
LOCAL_DEX_PREOPT := false
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
LOCAL_JNI_SHARED_LIBRARIES_ABI := arm64-v8a

MY_LOCAL_PREBUILT_JNI_LIBS := \
    lib/arm64-v8a/libaffinity.so \
    lib/arm64-v8a/libc++_shared.so \
    lib/arm64-v8a/libcrash_collect.so \
    lib/arm64-v8a/libCtaApiLib.so \
    lib/arm64-v8a/libframesequence.so \
    lib/arm64-v8a/libframesequence_doutu.so \
    lib/arm64-v8a/libkoom-java.so \
    lib/arm64-v8a/libkwai-linker.so \
    lib/arm64-v8a/liblogan.so \
    lib/arm64-v8a/libluajava.so \
    lib/arm64-v8a/libmarsxlog.so \
    lib/arm64-v8a/libmmkv.so \
    lib/arm64-v8a/libnative-sec.so \
    lib/arm64-v8a/libopus_v1.so \
    lib/arm64-v8a/libostar.so \
    lib/arm64-v8a/libqmp.so \
    lib/arm64-v8a/libSGMtlgShell.so \
    lib/arm64-v8a/libsimple_vad.so \
    lib/arm64-v8a/libsimplevadwrapper.so \
    lib/arm64-v8a/libsogou_speex_nt_v01.so \
    lib/arm64-v8a/libSogouAgc_v1.so \
    lib/arm64-v8a/libsogouupdcore.so \
    lib/arm64-v8a/libtgpalite.so \
    lib/arm64-v8a/libtrace-canary.so \
    lib/arm64-v8a/libvivo_account_wave.so \
    lib/arm64-v8a/libweibosdkcore.so \
    lib/arm64-v8a/libwind.so \
    lib/arm64-v8a/libxgVipSecurity.so \
    lib/arm64-v8a/libxhook_lib.so

MY_APP_LIB_PATH := $(TARGET_OUT_ODM)/bundled_persist-app/$(LOCAL_MODULE)/lib/$(LOCAL_JNI_SHARED_LIBRARIES_ABI)

# Ensure that the target lib64 directory exists before copying files
LOCAL_POST_INSTALL_CMD := \
    mkdir -p $(TARGET_OUT)/lib64 && \
    $(foreach lib, $(MY_LOCAL_PREBUILT_JNI_LIBS), \
        cp -f $(LOCAL_PATH)/$(lib) $(TARGET_OUT)/lib64/$(notdir $(lib)); \
    )

include $(BUILD_PREBUILT)

3.网上搜的那一圈缺的就是这个3，绝口不提需要创建lib这个目录是吧，绝口不提需要把apk解压出来的lib中的so文件放到这里面来

说一个成功的关键：相关的so文件是需要被复制到/system/lib64里面的，不然就算预装上了也运行不起会报错，代码如下

LOCAL_POST_INSTALL_CMD := \
    mkdir -p $(TARGET_OUT)/lib64 && \
    $(foreach lib, $(MY_LOCAL_PREBUILT_JNI_LIBS), \
        cp -f $(LOCAL_PATH)/$(lib) $(TARGET_OUT)/lib64/$(notdir $(lib)); \
    )

最后，希望对你有所帮助。