android

nmtools Android Example

This example shows how to use nmtools from android.

Build

Using android studio:

• open projects
• build

You need to install android ndk to build the example.

Using javac & javap

• use javac to generate JNI header:

  cd examples/android/nmtoolsdemo/app/src/main/java/com/example/nmtools_demo
  openjdk.javac -h . NmTools.java
  

  This will generate .class files
• use javap to check java signature to use java class from JNI:

  cd examples/android/nmtoolsdemo/app/src/main/java/com/example/nmtools_demo
  /snap/openjdk/1241/jdk/bin/javap -s NmTools\$NDArrayFloat.class
  

  example result:

  Compiled from "NmTools.java"
  public class com.example.nmtools_demo.NmTools$NDArrayFloat {
  public com.example.nmtools_demo.NmTools$NDArrayFloat();
      descriptor: ()V
  
  public com.example.nmtools_demo.NmTools$NDArrayFloat(float[], int[]);
      descriptor: ([F[I)V
  
  public java.lang.String to_string();
      descriptor: ()Ljava/lang/String;
  
  public float[] get_data();
      descriptor: ()[F
  
  public int[] get_shape();
      descriptor: ()[I
  }