我想用MediaRecorder录音,我的代码是:
public void record(View v) {
Log.d(TAG, "record");
this.mediaRecorder.setAudioChannels(1);
this.mediaRecorder.setAudioSamplingRate(44100);
this.mediaRecorder.setAudioEncodingBitRate(64000);
this.mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
this.mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
this.mediaRecorder.setOutputFile(this.file.getAbsolutePath());
this.mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
try {
this.mediaRecorder.prepare();
this.mediaRecorder.start();
// update the buttons
this.setButtonsEnabled(false, true, false);
} catch (IOException e) {
Log.e(TAG, "Failed to record()", e);
}
}
或者
public void record(View v) {
Log.d(TAG, "record");
this.mediaRecorder = new MediaRecorder();
this.mediaRecorder.setAudioChannels(1);
this.mediaRecorder.setAudioSamplingRate(8000);
this.mediaRecorder.setAudioEncodingBitRate(16);
this.mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
this.mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
this.mediaRecorder.setOutputFile(this.file.getAbsolutePath());
this.mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
this.mediaRecorder.prepare();
this.mediaRecorder.start();
// update the buttons
this.setButtonsEnabled(false, true, false);
} catch (IOException e) {
Log.e(TAG, "Failed to record()", e);
}
}
在三星上一切正常,但在戴尔上两种方法都不成功
这是日志:
02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397): Failed to record()
02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397): java.io.IOException: prepare failed.
02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397): at android.media.MediaRecorder._prepare(Native Method)
02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397): at android.media.MediaRecorder.prepare(MediaRecorder.java:524)
02-01 13:56:51.094: E/AudioRecorderDemoActivity(1397): at com.marakana.android.audiorecorderdemo.AudioRecorderDemoActivity.record(AudioRecorderDemoActivity.java:69)
02-01 14:05:20.074: E/AndroidRuntime(1790): FATAL EXCEPTION: main
02-01 14:05:20.074: E/AndroidRuntime(1790): java.lang.IllegalStateException: Could not execute method of the activity
最佳答案
首先,您的代码看起来不错。您是否已将所需的权限添加到您的 list 文件?
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
如果是,则尝试替换:
this.mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
通过
this.mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
不要忘记检查您的视频文件的路径是否正确。
关于android - 媒体记录器 IOException : prepare failed,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14640734/