import javax.imageio.*;
import java.awt.image.*;
import java.awt.*;
import java.security.NoSuchAlgorithmException;
import java.security.MessageDigest;
import java.lang.reflect.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.util.regex.*;
import java.util.List;
import java.util.*;


import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.app.Activity;
import android.widget.*;
import android.graphics.*;
import android.content.*; // Intent etc.



class SoundMeter {

    private AudioRecord ar = null;
    private int minSize;

    public void start() {
        minSize= AudioRecord.getMinBufferSize(8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
        ar = new AudioRecord(MediaRecorder.AudioSource.MIC, 8000,AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT,minSize);
        ar.startRecording();
    }

    public void stop() {
        if (ar != null) {
            ar.stop();
        }
    }

    public double getAmplitude() {
        short[] buffer = new short[minSize];
        ar.read(buffer, 0, minSize);
        int max = 0;
        for (short s : buffer)
        {
            if (Math.abs(s) > max)
            {
                max = Math.abs(s);
            }
        }
        return max;
    }

}

public class main {
  static double gain=5.0;

  static Object androidContext;

  public static void main(String[] args) throws Exception {
    SoundMeter sm = new SoundMeter();

    sm.start();
    goToHomeScreen ();
double highest = 1.0;
    for (int i = 0; i < 10000; i ++) {
    
      double amp = sm.getAmplitude();
      highest = Math.max(highest, amp);
      int col = (int) Math.min(255, Math.floor(amp/highest*gain*255));
      setWidgetColor(col);
    }
    sm.stop();
  }

static void setWidgetColor(int col) {
int w=1, h=1;
      int[] pixels = new int[w*h];
      for (int i=0; i < w*h; i++)
        pixels[i] = col;

      Bitmap bitmap = Bitmap.createBitmap(pixels, w, h, Bitmap.Config.RGB_565);
    
      call(androidContext, "updateWidgetWithBitmap", bitmap);
    }


static void goToHomeScreen() {
  Intent startMain = new Intent(Intent.ACTION_MAIN);
    startMain.addCategory(Intent.CATEGORY_HOME);
    startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    call(androidContext, "startActivity", startMain);
  }


  static Object call(Object o, String method, Object... args) {
    try {
      Method m = call_findMethod(o, method, args, false);
      m.setAccessible(true);
      return m.invoke(o, args);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  static Object call(Class c, String method, Object... args) {
    try {
      Method m = call_findStaticMethod(c, method, args, false);
      m.setAccessible(true);
      return m.invoke(null, args);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  static Method call_findStaticMethod(Class c, String method, Object[] args, boolean debug) {
    while (c != null) {
      for (Method m : c.getDeclaredMethods()) {
        if (debug)
          System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
        if (!m.getName().equals(method)) {
          if (debug) System.out.println("Method name mismatch: " + method);
          continue;
        }

        if ((m.getModifiers() & Modifier.STATIC) == 0 || !call_checkArgs(m, args, debug))
          continue;

        return m;
      }
      c = c.getSuperclass();
    }
    throw new RuntimeException("Method '" + method + "' (static) with " + args.length + " parameter(s) not found in " + c.getName());
  }

  static Method call_findMethod(Object o, String method, Object[] args, boolean debug) {
    Class c = o.getClass();
    while (c != null) {
      for (Method m : c.getDeclaredMethods()) {
        if (debug)
          System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
        if (m.getName().equals(method) && call_checkArgs(m, args, debug))
          return m;
      }
      c = c.getSuperclass();
    }
    throw new RuntimeException("Method '" + method + "' (non-static) with " + args.length + " parameter(s) not found in " + o.getClass().getName());
  }

  private static boolean call_checkArgs(Method m, Object[] args, boolean debug) {
    Class<?>[] types = m.getParameterTypes();
    if (types.length != args.length) {
      if (debug)
        System.out.println("Bad parameter length: " + args.length + " vs " + types.length);
      return false;
    }
    for (int i = 0; i < types.length; i++)
      if (!(args[i] == null || types[i].isInstance(args[i]))) {
        if (debug)
          System.out.println("Bad parameter " + i + ": " + args[i] + " vs " + types[i]);
        return false;
      }
    return true;
  }



  static Class<?> getClass(String name) {
    try {
      return Class.forName(name);
    } catch (ClassNotFoundException e) {
      return null;
    }
  }
}