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POAndroid - App wont start up
 

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  1. POAndroid - App wont start up
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    <p>My app wont start up with the following errors:</p> <pre><code>11-08 03:20:58.265: E/AndroidRuntime(306): FATAL EXCEPTION: main 11-08 03:20:58.265: E/AndroidRuntime(306): java.lang.NoClassDefFoundError: android.media.audiofx.Equalizer 11-08 03:20:58.265: E/AndroidRuntime(306): at com.example.audiotest.MainActivity.onCreate(MainActivity.java:86) 11-08 03:20:58.265: E/AndroidRuntime(306): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 11-08 03:20:58.265: E/AndroidRuntime(306): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 11-08 03:20:58.265: E/AndroidRuntime(306): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 11-08 03:20:58.265: E/AndroidRuntime(306): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 11-08 03:20:58.265: E/AndroidRuntime(306): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 11-08 03:20:58.265: E/AndroidRuntime(306): at android.os.Handler.dispatchMessage(Handler.java:99) 11-08 03:20:58.265: E/AndroidRuntime(306): at android.os.Looper.loop(Looper.java:123) 11-08 03:20:58.265: E/AndroidRuntime(306): at android.app.ActivityThread.main(ActivityThread.java:4627) 11-08 03:20:58.265: E/AndroidRuntime(306): at java.lang.reflect.Method.invokeNative(Native Method) 11-08 03:20:58.265: E/AndroidRuntime(306): at java.lang.reflect.Method.invoke(Method.java:521) 11-08 03:20:58.265: E/AndroidRuntime(306): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 11-08 03:20:58.265: E/AndroidRuntime(306): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 11-08 03:20:58.265: E/AndroidRuntime(306): at dalvik.system.NativeStart.main(Native Method) 11-08 03:20:58.285: E/AudioThread(306): Thread Loop Exception: java.lang.IllegalArgumentException: Invalid audio buffer size. </code></pre> <p>My codes for OnCreate()</p> <pre><code>protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //Audio, mic to speaker setVolumeControlStream(AudioManager.STREAM_MUSIC); initControls(); mAudioThread = new AudioThread(); mAudioThread.start(); //end //Equalizer enabled = (CheckBox)findViewById(R.id.enabled); enabled.setOnCheckedChangeListener (this); flat = (Button)findViewById(R.id.flat); flat.setOnClickListener(this); bass_boost = (SeekBar)findViewById(R.id.bass_boost); bass_boost.setOnSeekBarChangeListener(this); bass_boost_label = (TextView) findViewById (R.id.bass_boost_label); sliders[0] = (SeekBar)findViewById(R.id.slider_1); slider_labels[0] = (TextView)findViewById(R.id.slider_label_1); //more sliders till [4] mEqualizer = new Equalizer(0, mAudioTrack.getAudioSessionId()); mEqualizer.setEnabled(true); eq = new Equalizer (0, 0); if (eq != null) { eq.setEnabled (true); int num_bands = eq.getNumberOfBands(); num_sliders = num_bands; short r[] = eq.getBandLevelRange(); min_level = r[0]; max_level = r[1]; for (int i = 0; i &lt; num_sliders &amp;&amp; i &lt; MAX_SLIDERS; i++) { int[] freq_range = eq.getBandFreqRange((short)i); sliders[i].setOnSeekBarChangeListener(this); slider_labels[i].setText (formatBandLabel (freq_range)); } } for (int i = num_sliders ; i &lt; MAX_SLIDERS; i++) { sliders[i].setVisibility(View.GONE); slider_labels[i].setVisibility(View.GONE); } bb = new BassBoost (0, 0); if (bb != null) { } else { bass_boost.setVisibility(View.GONE); bass_boost_label.setVisibility(View.GONE); } updateUI(); } </code></pre> <p>For my AudioThread:</p> <pre><code> public class AudioThread extends Thread { // Handler message constants public static final int PLAY = 0; public static final int STOP = 1; // Class variables private boolean mRunning = false; private boolean mPlayAudio = false; private static class AudioThreadHandler extends Handler { private final WeakReference&lt;AudioThread&gt; mThread; public AudioThreadHandler(AudioThread thread) { mThread = new WeakReference&lt;AudioThread&gt;(thread); } @Override public void handleMessage(Message msg) { AudioThread thread = mThread.get(); if (thread != null) { switch(msg.what) { case PLAY: thread.mPlayAudio = true; break; case STOP: thread.mPlayAudio = false; break; } } } }; static final int bufferSize = 320000; final short[] buffer = new short[bufferSize]; short[] readBuffer = new short[bufferSize]; private final AudioThreadHandler mAudioThreadHandler = new AudioThreadHandler(this); @Override public void run() { try { int buffersize = AudioRecord.getMinBufferSize(11025, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT); AudioRecord arec = new AudioRecord(MediaRecorder.AudioSource.MIC, 11025, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize); AudioTrack atrack = new AudioTrack(AudioManager.STREAM_MUSIC, 11025, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize, AudioTrack.MODE_STREAM); atrack.setPlaybackRate(11025); byte[] buffer = new byte[buffersize]; arec.startRecording(); atrack.play(); mRunning = true; while(mRunning) { if (mPlayAudio) { arec.read(buffer, 0, buffersize); atrack.write(buffer, 0, buffer.length); }else { } } } catch (Exception e) { Log.e("AudioThread", "Thread Loop Exception: " + e); } } public void close() { mRunning = false; } public Handler getHandler() { return mAudioThreadHandler; } } </code></pre> <p>Sorry, everything may seem very messy. But this error have been stuck with me for a long time. Hope you guys could really help. Take a look at my project if you would and provide me the the instructions for things I've done wrong. </p>
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    1. COAre you using external jar libraries??
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    2. COwhere is your Equalizer class
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      1. USShakeeb Ayaz
    3. COI do not use any external jar libraries and I do not have a Equalizer class. Everything is in my MainActivity class.
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