#native library

First step

You need to add as below in build.gradle (Moudle: YOURMOUDLE).

dependencies { compile fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar') }

This one is outter all of class.

task nativeLibsToJar(type: Jar, description: 'create a jar archive of the native libs') { destinationDir file("$buildDir/native-libs") baseName 'native-libs' from fileTree(dir: 'libs', include: '**/*.so') into 'lib/' } tasks.withType(JavaCompile) { compileTask -> compileTask.dependsOn(nativeLibsToJar) }

Then your first step has finished!!

Second step

New a folder 'jnilibs' at MODULE/src/main.

The path image as like below

Module ├ src ├ main ├ jniLibs ├ armeabi | └ libcpu_jni.so ├ armeabi-v7a | └ libcpu_jni.so ├ mips | └ libcpu_jni.so └ x86 └ libcpu_jni.so

Then you can enjoy using it!!

Put them in libs

First step

The same as way one. You need to add something in build.gradle (Moudle: YOURMOUDLE).

android { sourceSets { main { jniLibs.srcDirs = ['libs'] } } }

You have already finished half of process!!!

Second step

You just put *.so file you prepared in the MOUDLE/libs/.

The path image as like below

Module ├ libs ├ armeabi | └ libcpu_jni.so ├ armeabi-v7a | └ libcpu_jni.so ├ mips | └ libcpu_jni.so └ x86 └ libcpu_jni.so

Just easy to import your *.so file.

How to use .so file's method

You just type a little code then you can declare the function.

// Register the function name as following in your libcpu_jni.so file. private static final native boolean readProcFile(String file, int[] format, String[] outStrings, long[] outLongs, float[] outFloats); // Load that libcpu_jni.so file from native library. static { try { System.loadLibrary("cpu_jni"); } catch (UnsatisfiedLinkError ule) { Log.e("LoadJniLib", "Error: Could not load native library: " + ule.getMessage()); } }

Call the native function.

readProcFile("/proc/stat", SYSTEM_CPU_FORMAT, null, sysCpu, null)