Sto sperimentando con la classe AudioTrack. Fondamentalmente, la mia app deve generare un suono quando l'utente tocca uno specifico oggetto sullo schermo. Ho usato this example come guida.
mia app sembra funzionare come dovrebbe, ma di solito dopo aver toccato lo schermo per circa un minuto si blocca:
AudioTrack: play() chiamato su AudioTrack non inizializzato
07-02 20:40:53.459: E/AndroidRuntime(11973): FATAL EXCEPTION: Thread-10
07-02 20:40:53.459: E/AndroidRuntime(11973): java.lang.IllegalStateException: play() called on uninitialized AudioTrack.
07-02 20:40:53.459: E/AndroidRuntime(11973): at android.media.AudioTrack.play(AudioTrack.java:824)
07-02 20:40:53.459: E/AndroidRuntime(11973): at com.mysounds_experimental.SoundThread.playSound(SoundThread.java:108)
07-02 20:40:53.459: E/AndroidRuntime(11973): at com.mysounds_experimental.SoundThread.run(SoundThread.java:69)
I metodi di classe che genera suoni
public void initAudioTrack() {
int bufferSize = AudioTrack.getMinBufferSize(sampleRate
, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);
audioTrack = new AudioTrack(
AudioManager.STREAM_MUSIC
, sampleRate
, AudioFormat.CHANNEL_CONFIGURATION_MONO
, AudioFormat.ENCODING_PCM_16BIT
, bufferSize
, AudioTrack.MODE_STREAM);
}
private void playSound(){
audioTrack.write(generatedSnd, 0, numSamples);
audioTrack.play();
}
public void stopPlaying() {
audioTrack.flush();
audioTrack.stop();
audioTrack.release();
}
@Override
public void run() {
while (mRun) {
try{
Thread.sleep(200);
while(soundCycle){
if(freqOfTone != -1f) {
generateTone();
playSound();
Thread.sleep(200);
}
}
} catch(InterruptedException e){
// soundCycle = false;
// soundPool.stop(BEEP);
}
}
}
Questo è un metodo da una visualizzazione personalizzata mio thread viene utilizzato
@Override
public boolean onTouchEvent(final MotionEvent ev) {
int currentXPosition = (int) ev.getX();
int currentYPosition = (int) ev.getY();
if(ev.getX() < smBitmap.getWidth())
if(ev.getY() < smBitmap.getHeight()){
tempCol = smBitmap.getPixel(currentXPosition, currentYPosition);
}
final int action = ev.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN: {
sThread.freqOfTone = getFreqPreset(tempCol);
if(col != tempCol){
// sThread.initAudioTrack();
sThread.interrupt();
if(shouldInit) {
shouldInit = false;
sThread.initAudioTrack();
}
sThread.soundCycle = true;
col = tempCol;
invalidate();
}
break;
}
case MotionEvent.ACTION_MOVE: {
sThread.freqOfTone = getFreqPreset(tempCol);
if (tempCol == -1 || tempCol == 0) {
sThread.soundCycle = false;
shouldInit = true;
// sThread.stopPlaying();
sThread.interrupt();
invalidate();
} else {
if(col != tempCol){
sThread.interrupt();
col = tempCol;
invalidate();
}else {
sThread.soundCycle = true;
col = tempCol;
invalidate();
}
}
break;
}// case ACTION_MOVE
case MotionEvent.ACTION_UP: {
sThread.soundCycle = false;
shouldInit = true;
// sThread.stopPlaying();
sThread.interrupt();
col = -1;
mActivePointerId = INVALID_POINTER_ID;
break;
}// case ACTION_UP
}
return true;
}
Tutte le idee w sta succedendo?
'// sThread.initAudioTrack();' Decomprimi questo –
Ho detto un commento, non rimuovere –
Scusa, intendevo dire un commento. – droid8421