Android Studio cmake 编译32位库

在build.gradle中，defaultConfig里，externalNativeBuild代码块下添加

ndk {
    // Specifies the ABI configurations of your native
    // libraries Gradle should build and package with your APK.
    abiFilters  'armeabi', "armeabi-v7a"
}

这样编译出来的库将是32位的库