harmony 鸿蒙SDK Usage

  • 2023-06-24
  • 浏览 (750)

SDK Usage

What is the macro definition of the arm64-v8a/armeabi-v7a directory in CMake?

Applicable to: OpenHarmony 3.1 Beta 5 (API version 9)

Solution

The arm64-v8a and armeabi-v7a directories are as follows:

entry
├─ libs
│    ├─ arm64-v8a
│    │    └─ libMyDemo.so
│    └─ armeabi-v7a
│         └─ libMyDemo.so
└─ src
     └─ main
          └─ cpp
               └─ CMakeLists.txt

The macro for accessing the directory is \${CMAKE_CURRENT_SOURCE_DIR}/../../../libs/${OHOS_ARCH}/xxxx.so.

CMAKE_CURRENT_SOURCE_DIR: directory where the CMakeList.txt file is stored.

OHOS_ARCH: type of the application binary interface (ABI). The value can be armeabi-v7a or arm64-v8a. The default value is arm64-v8a.

Example

Add the link library to CMakeLists.txt.

target_link_libraries(entry PUBLIC
    libace_napi.z.so
    libhilog_ndk.z.so
    ${CMAKE_CURRENT_SOURCE_DIR}/../../../libs/${OHOS_ARCH}/libMyDemo.so
)

What should I do if an error is reported when OH_LOG_Print in the native code is used to print logs?

Applicable to: OpenHarmony 3.1 Beta 5 (API version 9)

Problem

When OH_LOG_Print is used in the native code to print logs, the following error is reported: undefined symbol: OH_LOG_Print.

Cause

The link library file is missing.

Solution

Open the CMakeLists.txt file and append libhilog_ndk.z.so to target_link_libraries.

set(NATIVERENDER_ROOT_PATH ${CMAKE_CURRENT_SOURCE_DIR})
target_link_libraries(entry PUBLIC
    libace_napi.z.so
    libhilog_ndk.z.so
)

How do I traverse files in rawfile?

Applicable to: OpenHarmony 3.1 Beta 5 (API version 9)

Solution

Use the OH_ResourceManager_OpenRawDir() native API to obtain the root directory of rawfile and traverse the root directory.

Reference

Rawfile

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