안드로이드 - 안드로이드 주파수/소음측정기

안드로이드 - 안드로이드 주파수/소음측정기

출처:http://blog.daum.net/01077250925/94

package com.llk.helphere.frequency;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.llk.helphere.location!.Location!Informatioin;
import com.llk.helphere.preference.AppPreference;

public class AudioProcessing extends Activity implements OnClickListener{
int mcompare=0;
int frequency = 8000;
int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;
int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;
private RealDoubleFFT transformer;
private AppPreference mPref;
int blockSize=256;
Button startStopButton;
Button mSaveButton;
boolean started = false;

RecordAudio recordTask;

ImageView imageView;
Bitmap bitmap;
Canvas canvas;
Paint paint;
TextView testview;
EditText medit;

int result;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mPref = new AppPreference(getApplicationContext());

startStopButton = (Button)findViewById(R.id.StartStopButton);
startStopButton.setOnClickListener(this);
mSaveButton = (Button)findViewById(R.id.saveButton);
mSaveButton.setOnClickListener(this);

transformer = new RealDoubleFFT(blockSize);
imageView = (ImageView)findViewById(R.id.ImageView01);
testview = (TextView)findViewById(R.id.test);
medit = (EditText)findViewById(R.id.frequency);


bitmap = Bitmap.createBitmap((int)256,(int)100,Bitmap.Config.ARGB_8888);
//그림 자르기(Bitmap source,int x, int y, int width, int height)
canvas = new Canvas(bitmap);
paint = new Paint();
paint.setColor(Color.GREEN);
imageView.setImageBitmap(bitmap);

LocationInformatioin location = new LocationInformatioin(getApplicationContext());
location.onStart();

String input = medit.getText().toString();
if (input.compareTo("") == 1) {
int a = Integer.parseInt(input);
mPref.addHZ(a);
}
//testview.setText(String.valueOf(result));
}


@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
mPref.getHZ();
}

@Override
public void onStop(){
super.onStop();


}

private class RecordAudio extends AsyncTask<Void, double[], Void> {
protected void onProgressUpdate(double[]... toTransform) {
canvas.drawColor(Color.BLACK);

for (int i = 0; i < toTransform[0].length; i++)
{

int x = i;

int downy = (int) (100 - (toTransform[0][i] * 10));
int upy = 100;
int test1 = (int) (toTransform[0][i] * 100);

if(test1 > 2000){
Log.e("주파수 : ",test1+"HZ");
}

if(test1>mcompare)
mcompare=test1;

testview.setText(String.valueOf(mcompare));
canvas.drawLine(x, downy, x, upy, paint);
}


imageView.invalidate();
}

@Override
protected Void doInBackground(Void... params) {
try{
int bufferSize = AudioRecord.getMinBufferSize(frequency, channelConfiguration, audioEncoding);

AudioRecord audioRecord = new AudioRecord(
MediaRecorder.AudioSource.VOICE_RECOGNITION,frequency,channelConfiguration,audioEncoding, bufferSize);

short[] buffer = new short[blockSize];
double[] toTransform = new double[blockSize];



audioRecord.startRecording();

while(started){
int bufferReadResult = audioRecord.read(buffer,0,blockSize);

for(int i = 0; i < blockSize && i < bufferReadResult; i++){


toTransform[i] = (double)buffer[i] / Short.MAX_VALUE;

//result = (int)toTransform[i];
//testview.setText(String.valueOf(result));
// if(toTransform[i]>test){
// Log.e("", "" + toTransform[i]);
// test = toTransform[i];
// result = toTransform[i];
// }
// else{
// result = test;
// }
}
transformer.ft(toTransform);
publishProgress(toTransform);
}
audioRecord.stop();
}catch(Throwable t){
Log.e("AudioRecord","Recording Failed");
}
return null;
}
}

@Override

public void onClick(View v){

switch (v.getId()) {
case R.id.StartStopButton:
if (started) {
started = false;
startStopButton.setText("Start");
recordTask.cancel(true);
} else {
started = true;
startStopButton.setText("Stop");
recordTask = new RecordAudio();
recordTask.execute();
}
break;

case R.id.saveButton:
Toast.makeText(this, "저장되었습니다.", Toast.LENGTH_SHORT).show();
break;
}
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_audio_record, menu);
return true;
}


}