The NDK compiler so libraries

1.android studio Select the ndk version to download in the sdk settings

ndk development version we downloaded here is 21.0.6113669

Android stuido's local.properties needs to configure sdk and ndk paths

For example

sdk.dir=C\:\\Sdk
ndk.dir=C\:\\Sdk\\ndk\\21.0.6113669

2. Configure the ndk environment variable Path as long as it points to the directory of the ndk-build.cmd file

3. Check whether the ndk environment is well configured cmd command: ndk-build -v

GNU Make 4.2.1
Built for x86_64-w64-mingw32
Copyright (C) 1988-2016 Free Software Foundation, Inc.

License GPLv3+: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it.
There is NOWARRANTY, to the extent permitted by law.

Indicates that the environment has been configured

4. Compile the library

The first method is to put the file into the project app module and the java-level directory jni..Don't wrap jni in another folder, then enter this directory

For example e: enter the E drive cd E:\jni enter the directory and then execute the command ndk-build will generate the so library

If unsuccessful, see what the error is..Is the directory of the file wrong? Adjust it again

Putting into the project is mainly to facilitate viewing the contents of the file and facilitate modification

The second method is actually the same as the first.Just don't put it into the project.Direct command to enter the directory (no need to change to jni), just execute ndk-build, so file will be generated, each cpp file will generate a so file

Pro-test can generate no problem

You can take a look

[ndk] The common process of using Android.mk to generate so files and the death process-Gray letter network (software development blog aggregation)