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POAndroid - Playing random sound from OnTouch with SoundManager
 

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  1. POAndroid - Playing random sound from OnTouch with SoundManager
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    <p>I am wanting a random sound to play whenever the user touches the screen. I have found and used these other posts to help set up my project and get me moving in the right direction.</p> <p><a href="https://stackoverflow.com/questions/13885420/play-random-sound-file-on-button-press-android">Play random sound file on button press - Android</a></p> <p><a href="https://stackoverflow.com/questions/10168826/issue-with-sound-manager-playing-random-files">Issue With Sound Manager Playing Random Files</a></p> <p><a href="https://stackoverflow.com/questions/10168826/issue-with-sound-manager-playing-random-files">Issue With Sound Manager Playing Random Files</a></p> <p><a href="https://stackoverflow.com/questions/10115238/play-a-random-sound-ontouch">Play A Random Sound onTouch</a></p> <p>The problem is that with my current code I am getting a NullPointerException. The LogCat is showing it coming from two spots: </p> <p>In the Main class at </p> <pre><code>int x = r.nextInt(1); </code></pre> <p>and in the SoundManager class at </p> <pre><code>mSoundPool.play(mSoundPoolMap.get(index), streamVolume, streamVolume, 1, 0, 1f); </code></pre> <p>I know this is just something I am overlooking, but can't seem to figure it out. Pretty new to Android and Java developing so that is why. I have included both the Main and SoundManager classes. Any help would be appreciated!</p> <p>MAIN CLASS</p> <pre><code>import java.util.Random; import android.app.Activity; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.ImageView; public class Main extends Activity implements OnTouchListener { Random r = new Random(); int x = r.nextInt(1); private SoundManager mSoundManager; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ImageView image = (ImageView) findViewById(R.id.mIll); image.setOnTouchListener(this); mSoundManager = new SoundManager(); mSoundManager.initSounds(getBaseContext()); mSoundManager.addSound(1, R.raw.m1); mSoundManager.addSound(2, R.raw.m2); mSoundManager.addSound(3, R.raw.m3); mSoundManager.addSound(4, R.raw.m4); mSoundManager.addSound(5, R.raw.m5); } @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: { mSoundManager.playSound(x); } break; } return true; } } </code></pre> <p>SOUND MANAGER</p> <pre><code>import java.util.HashMap; import android.content.Context; import android.media.AudioManager; import android.media.SoundPool; public class SoundManager { private SoundPool mSoundPool; private HashMap&lt;Integer, Integer&gt; mSoundPoolMap; private AudioManager mAudioManager; private Context mContext; public static final int maxSounds = 1; public SoundManager() { } public void initSounds(Context theContext) { mContext = theContext; mSoundPool = new SoundPool(1, AudioManager.STREAM_MUSIC, 0); mSoundPoolMap = new HashMap&lt;Integer, Integer&gt;(); mAudioManager = (AudioManager) mContext .getSystemService(Context.AUDIO_SERVICE); } public void addSound(int Index, int SoundID) { mSoundPoolMap.put(Index, mSoundPool.load(mContext, SoundID, 1)); } public void playSound(int index) { int streamVolume = mAudioManager .getStreamVolume(AudioManager.STREAM_MUSIC); mSoundPool.play(mSoundPoolMap.get(index), streamVolume, streamVolume, 1, 0, 1f); } } </code></pre>
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    2. COpost your logcat (to verify where exactly you're having the second error. I'm pretty sure my answer rectifies the first one)
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