Apps Problems recording audio

[Tusike]

Hi!

I'm trying to write a program that reads the microphone's data in real time.

Here is my main class so far:

package com.example.mictest;

import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.media.MediaRecorder.AudioSource;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {
	//variables
	private boolean isRecording = false;
	private int audioSource = MediaRecorder.AudioSource.MIC;
	private int samplingRate = 44100; /* in Hz*/
	private int channelConfig = AudioFormat.CHANNEL_IN_MONO;
	private int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
	private int bufferSize = AudioRecord.getMinBufferSize(samplingRate, channelConfig, audioFormat);
	private int sampleNumBits = 16;
	private int numChannels = 1;
	private byte[] data;
	
	private TextView TV;

	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		TV = (TextView) findViewById(R.id.textView1);
		
		AudioRecord recorder = new AudioRecord(AudioSource.MIC, samplingRate, channelConfig, audioFormat, bufferSize);
		TV.setText(Integer.toString(recorder.getState()));
		recorder.release();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

I'm already having problems initializing the AudioRecord, the value of getState() is zero.
LogCat:

09-24 18:01:07.139: E/AudioRecord(2530): AudioFlinger could not create record track, status: -1
09-24 18:01:07.139: E/AudioRecord-JNI(2530): Error creating AudioRecord instance: initialization check failed.
09-24 18:01:07.139: E/AudioRecord-Java(2530): [ android.media.AudioRecord ] Error code -20 when initializing native AudioRecord object.

I already set the permission for RECORD_AUDIO in the manifest file.
I have a Samsung Galaxy Spica with API version 7.

Does anyone have any idea why I can't get it to work?

Thanks for any help!

-Tusike

 

[DonniEx]

see this, http://programondaspot.blogspot.com/2015/06/hi-guys-now-i-want-to-show-you-how-to.html

 

[mikedt]

Hi there, I moved your thread to Application Development, as this is a development and coding problem rather than a general problem with media itself, e.g. "my MP3s won't play." Hopefully should find much more help and assistance here.