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| package com.test.test;
import android.app.Activity;
import android.graphics.Color;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.OnGestureListener;
import android.widget.Button;
import android.widget.TextView;
public class test extends Activity {
public AudioTrack at;
public TextView tv;
public TextView Start;
public TextView Stop;
public int minbufsizbytes;
public int bufsizbytes;
public int bufsizsamps;
public final int samprate = 44100;
public short[] buffer=null;
public final float f=1000.0f; //beep freq
public final float MAXVOL=(float)1.0;
public final float MINVOL=(float)0.01;
public final int LOOPON= -1;
public final int LOOPOFF=0;
public int tmp;
int ok=0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Start = (Button)findViewById(R.id.Start);
Stop = (Button)findViewById(R.id.Stop);
Start.setOnClickListener(play);
Stop.setOnClickListener(stop_play);
tv= (TextView)findViewById(R.id.tv1);
minbufsizbytes = AudioTrack.getMinBufferSize(samprate,AudioFormat.CHANNEL_CONFIGURATION_MONO,AudioFormat.ENCODING_PCM_16BIT)*15; //870 at 8000, 4800 at 44100
bufsizbytes=minbufsizbytes; //
tv.setText("minbufsizebytes "+minbufsizbytes+"\n"); //gets to here
bufsizsamps=bufsizbytes/2;
buffer = new short[bufsizsamps];
fillbuf();
try{
at = new AudioTrack(AudioManager.STREAM_MUSIC,samprate,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT,bufsizbytes,AudioTrack.MODE_STREAM);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
tv.append("create audiotracksnafu "+e+"\n"); //gets to here
e.printStackTrace();
}
at.setStereoVolume(1.0f,1.0f);
}//oncreate
void fillbuf(){
double omega,t;
double dt=1.0/samprate; //sec per samp
t=0.0;
omega=(float)(2.0*Math.PI*f);
for(int i=0; i < bufsizsamps; i++){
buffer[i]=(short)(32000.0*Math.sin(omega*t));
t+=dt;
}
}
View.OnClickListener play = new View.OnClickListener()
{
//@Override
public void onClick(View view) {
tv.append("in playit!\n"); //
at.play();
ok=1;
while (ok==1){
tmp=at.write(buffer, 0, bufsizsamps);
//SystemClock.sleep(1000L);
tv.append("tmpp="+tmp+"\n"); //
}
}
};
View.OnClickListener stop_play = new View.OnClickListener()
{
//@Override
public void onClick(View view) {
tv.append("in stop!\n"); //
at.stop();
ok=0;
}
};
//----------lifecycle callbacks----------------
@Override
public void onPause(){
super.onPause();
at.pause();
tv.append("onpause!\n"); //gets to here
}
@Override
public void onResume(){
super.onResume();
tv.append("onresume!\n"); //gets to here
// playit();
}
@Override
public void onStop(){
super.onStop();
at.stop();
tv.append("onstop!\n"); //gets to here
}
}//activity |
