AudioRecord对象在项目未初始化
问题描述:
当我尝试使用下面的代码AudioRecord对象在项目未初始化
record = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRate, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_8BIT, BYTE_OF_SAMPLE * bufferSampleSize);
record.startRecording();
然后我得到下面的logcat的例外透过我的Nexus 5录制音频:
E/AudioRecord: AudioFlinger could not create record track, status: -1
E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -1.
E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
E/AndroidRuntime: FATAL EXCEPTION: Thread-855
E/AndroidRuntime: Process: com.*.*, PID: 14206
E/AndroidRuntime: java.lang.IllegalStateException: startRecording() called on an uninitialized AudioRecord.
E/AndroidRuntime: at android.media.AudioRecord.startRecording(AudioRecord.java:885)
E/AndroidRuntime: at com.*.*.MainActivity$Looper.run(MainActivity.java:265)
E/Surface: getSlotFromBufferLocked: unknown buffer: 0x9e476d00
我在清单文件中添加了以下行。
<uses-permission android:name="android.permission.RECORD_AUDIO" />
我测试过AudioRecord object not initializing。这些解决方案都不起作用。
但它在另一个项目中工作。 有什么缺失?
答
我用它来记录。从这里Android Audio recording example
private void startRecording() {
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.HE_AAC);
mRecorder.setAudioEncodingBitRate(48000);
} else {
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
mRecorder.setAudioEncodingBitRate(64000);
}
mRecorder.setAudioSamplingRate(16000);
mOutputFile = getOutputFile();
mOutputFile.getParentFile().mkdirs();
mRecorder.setOutputFile(mOutputFile.getAbsolutePath());
try {
mRecorder.prepare();
mRecorder.start();
mStartTime = SystemClock.elapsedRealtime();
mHandler.postDelayed(mTickExecutor, 100);
Log.d("Voice Recorder","started recording to "+mOutputFile.getAbsolutePath());
} catch (IOException e) {
Log.e("Voice Recorder", "prepare() failed "+e.getMessage());
}
}
+0
,因为我需要读取音频数据来创建频谱分析仪无法使用MediaRecorder。 – skabir
你是最棒的! –
这就是我的问题! – StarWind0
我的所有用户都必须进入设置并手动进行此操作吗?我不能以编程方式执行此操作。 – nilsi