I'm using the code below find an available combination of params to create an AudioRecord object.
public static AudioRecord findAudioRecord() { for (int rate : new int[]{8000, 11025, 16000, 22050, 44100}) { for (int audioFormat : new int[]{ AudioFormat.ENCODING_DEFAULT, AudioFormat.ENCODING_PCM_16BIT, AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_FLOAT, AudioFormat.ENCODING_AC3, AudioFormat.ENCODING_E_AC3, AudioFormat.ENCODING_DTS, AudioFormat.ENCODING_DTS_HD, }) { for (int channelConfig : new int[]{ AudioFormat.CHANNEL_IN_DEFAULT, AudioFormat.CHANNEL_IN_LEFT, AudioFormat.CHANNEL_IN_RIGHT, AudioFormat.CHANNEL_IN_FRONT, AudioFormat.CHANNEL_IN_BACK, AudioFormat.CHANNEL_IN_LEFT_PROCESSED, AudioFormat.CHANNEL_IN_RIGHT_PROCESSED, AudioFormat.CHANNEL_IN_FRONT_PROCESSED, AudioFormat.CHANNEL_IN_BACK_PROCESSED, AudioFormat.CHANNEL_IN_PRESSURE, AudioFormat.CHANNEL_IN_X_AXIS, AudioFormat.CHANNEL_IN_Y_AXIS, AudioFormat.CHANNEL_IN_Z_AXIS, AudioFormat.CHANNEL_IN_VOICE_UPLINK, AudioFormat.CHANNEL_IN_VOICE_DNLINK, AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO}) { try { Log.d(TAG, "Attempting rate " + rate + "Hz, bits: " + audioFormat + ", channel: " + channelConfig); int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfig, audioFormat); if (bufferSize != AudioRecord.ERROR_BAD_VALUE) { // check if we can instantiate and have a success AudioRecord recorder = new AudioRecord(MediaRecorder.AudioSource.DEFAULT, rate, channelConfig, audioFormat, bufferSize); if (recorder.getState() == AudioRecord.STATE_INITIALIZED) { return recorder; } recorder.release(); } } catch (Exception e) { Log.e(TAG, rate + "Exception, keep trying.", e); } } } } return null; } But the function always returns null, with no available params found. Most combinations pass the bufferSize != AudioRecord.ERROR_BAD_VALUE condition check, but get false for recorder.getState() == AudioRecord.STATE_INITIALIZED.
I have tried to reboot my device (MOTO X2), but it didn't work.
I have declared the RECORD_AUDIO permission, and below is the manifest file:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.gowear"> <uses-permission android:name="android.permission.WAKE_LOCK"/> <uses-permission android:name="android.permission.RECORD_AUDIO" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".RecordActivity" android:label="@string/title_activity_record" android:theme="@style/AppTheme.NoActionBar"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> </manifest> Below is the debug log:
03-08 20:48:58.080 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 3, channel: 16 03-08 20:48:58.091 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.092 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.092 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.093 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 3, channel: 12 03-08 20:48:58.096 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.097 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.097 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.097 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 3, channel: 1 03-08 20:48:58.101 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.102 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.102 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.102 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 2, channel: 16 03-08 20:48:58.105 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.106 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.106 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.106 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 2, channel: 12 03-08 20:48:58.109 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.110 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.110 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.110 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 2, channel: 1 03-08 20:48:58.114 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.115 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.115 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.115 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 1, channel: 16 03-08 20:48:58.115 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0 channelMask 10 03-08 20:48:58.115 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0, channelMask 0x10; status -22 03-08 20:48:58.115 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 1, channel: 12 03-08 20:48:58.116 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0 channelMask c 03-08 20:48:58.116 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0, channelMask 0xc; status -22 03-08 20:48:58.116 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 1, channel: 1 03-08 20:48:58.116 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0 channelMask 10 03-08 20:48:58.116 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0, channelMask 0x10; status -22 03-08 20:48:58.116 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 5, channel: 16 03-08 20:48:58.116 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0x9000000 channelMask 10 03-08 20:48:58.116 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0x9000000, channelMask 0x10; status -22 03-08 20:48:58.116 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 5, channel: 12 03-08 20:48:58.116 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0x9000000 channelMask c 03-08 20:48:58.116 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0x9000000, channelMask 0xc; status -22 03-08 20:48:58.117 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 5, channel: 1 03-08 20:48:58.117 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0x9000000 channelMask 10 03-08 20:48:58.117 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0x9000000, channelMask 0x10; status -22 03-08 20:48:58.117 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 6, channel: 16 03-08 20:48:58.117 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0xa000000 channelMask 10 03-08 20:48:58.117 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0xa000000, channelMask 0x10; status -22 03-08 20:48:58.117 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 6, channel: 12 03-08 20:48:58.117 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0xa000000 channelMask c 03-08 20:48:58.117 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0xa000000, channelMask 0xc; status -22 03-08 20:48:58.118 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 6, channel: 1 03-08 20:48:58.118 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 8000 format 0xa000000 channelMask 10 03-08 20:48:58.118 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 8000, format 0xa000000, channelMask 0x10; status -22 03-08 20:48:58.118 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 4, channel: 16 03-08 20:48:58.121 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.123 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.123 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.123 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 4, channel: 12 03-08 20:48:58.126 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.127 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.127 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.127 12250-12250/com.example.gowear D/Recorder: Attempting rate 8000Hz, bits: 4, channel: 1 03-08 20:48:58.133 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.134 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.134 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.134 12250-12250/com.example.gowear D/Recorder: Attempting rate 11025Hz, bits: 3, channel: 16 03-08 20:48:58.137 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.138 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.138 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.139 12250-12250/com.example.gowear D/Recorder: Attempting rate 11025Hz, bits: 3, channel: 12 03-08 20:48:58.141 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.149 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.149 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.149 12250-12250/com.example.gowear D/Recorder: Attempting rate 11025Hz, bits: 3, channel: 1 03-08 20:48:58.152 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.154 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.154 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.154 12250-12250/com.example.gowear D/Recorder: Attempting rate 11025Hz, bits: 2, channel: 16 03-08 20:48:58.157 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.159 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.159 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.159 12250-12250/com.example.gowear D/Recorder: Attempting rate 11025Hz, bits: 2, channel: 12 03-08 20:48:58.161 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.163 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.163 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.163 12250-12250/com.example.gowear D/Recorder: Attempting rate 11025Hz, bits: 2, channel: 1 03-08 20:48:58.166 12250-12250/com.example.gowear E/AudioRecord: AudioFlinger could not create record track, status: -1 03-08 20:48:58.167 12250-12250/com.example.gowear E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1. 03-08 20:48:58.167 12250-12250/com.example.gowear E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object. 03-08 20:48:58.167 12250-12250/com.example.gowear D/Recorder: Attempting rate 11025Hz, bits: 1, channel: 16 03-08 20:48:58.168 12250-12250/com.example.gowear E/AudioSystem: AudioSystem::getInputBufferSize failed sampleRate 11025 format 0 channelMask 10 03-08 20:48:58.168 12250-12250/com.example.gowear E/AudioRecord: AudioSystem could not query the input buffer size for sampleRate 11025, format 0, channelMask 0x10; status -22 ...
I have read lots of similar questions but none of them could fix my problem. Is there any other solution? Thanks!
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