从另一个目录调用一个类

Question

I know this sounds a bit silly.. but im really confused about this:

I need to instanciate the FFTProcessor class to the main activity, or move it to the com.example.audioconv package (i tried moving it but i had problems loading the libraries).

The FFTProcessor class calls the native functions implemented in in_waslos_kneo_libsimplefft_FFTProcessor.c

Here is where i have to call the class:

public class MainActivity extends Activity {
//---------------------------------------------------------variables declaration
File externalDir1=Environment.getExternalStorageDirectory();
File externalDir2=Environment.getExternalStorageDirectory();
File f1=new File(externalDir1.getAbsolutePath()+"/Test"+File.separator+"wav1.wav");
File f2=new File(externalDir2.getAbsolutePath()+"/Test"+File.separator+"wav2.wav");
//-----------------------------------load libraryv
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    try {
        //-------------------------read files
        float[]raw1=bytesToFloats(read(f1));
        float[]raw2=bytesToFloats(read(f2));
        float[] im1=new float[raw1.length];//----imaginary parts
        float[] im2=new float[raw2.length];//----

        for(int j=0;j<im1.length;j++)
        {
            im1[j]=0;
        }
        for(int k=0;k<im2.length;k++)
        {
            im2[k]=0;
        }
        int convhandle= FFTProcessor.createFastConvolutionContext(raw1.length, raw1, im1);
        FFTProcessor.performFastConvolution(convhandle, raw2, im2);
        //------------------------------------------------convolution log
        for (int i=0;i<raw2.length; i++)
            Log.i("convolution", "conv output   "+raw2+"  "+im2);

And in FFTProcessor class:

package in.waslos.kneo.libsimplefft;

public class FFTProcessor{
    public static final byte FFT_MODE_NORMAL  = 0;
    public static final byte FFT_MODE_INVERSE = 1;

public static final byte CPLX_TYPE_SP  = 0;
public static final byte CPLX_TYPE_DP  = 1;
public static final byte CPLX_TYPE_INT = 2;

static{
    System.loadLibrary("simplefft");
    System.loadLibrary("simplefft4j");
}

private static native int createFFTContext(int samples, byte mode, byte type);
private static native void destroyFFTContext(int handle);
....

any help?

Answer 1

您可以使另一个项目如何包含第二个目录作为源代码，并将其添加到项目的类路径中。