我正在尝试使用MediaRecorder录制音频片段，但是当我开始，停止并重新开始时，我一直在我的Logcat中收到这些错误;活动也将结束：
INFO/DEBUG(1285): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
INFO/DEBUG(1285): Build fingerprint: 'LGE/thunderg/thunderg/thunderg:2.2.1/FRG83/eng.nikech.choi.20110126.134422:user/release-keys'
INFO/DEBUG(1285): signal 11 (SIGSEGV), fault addr 00000010
INFO/DEBUG(1285): r0 00000000 r1 00000000 r2 a930cc98 r3 00000001
……
INFO/DEBUG(1285): #00 pc 00033c28 /system/lib/libmedia.so
INFO/DEBUG(1285): #01 pc 0000780e /system/lib/libmedia_jni.so
……
INFO/DEBUG(1285): code around pc:
INFO/DEBUG(1285): a9033c08 2001e001 1c1861a0 46c0bd70 00029a58
……
INFO/DEBUG(1285): code around lr:
INFO/DEBUG(1285): a93077f0 f7ffb510 bd10ffcf b082b570 ae011c05
……
INFO/DEBUG(1285): stack:
INFO/DEBUG(1285): bef054d0 00000001
……
录制音频剪辑并可以在计算机上播放，但如果我想录制另一个，则会发生上述情况。我已经在清单中要求许可了：
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
我使用了Ben McCann的代码：
import java.io.File;
import java.io.IOException;
import android.media.MediaRecorder;
import android.os.Environment;
/**
* @author <a href="http://www.benmccann.com">Ben McCann</a>
*/
public class AudioRecorder {
final MediaRecorder recorder = new MediaRecorder();
final String path;
/**
* Creates a new audio recording at the given path (relative to root of SD card).
*/
public AudioRecorder(String path) {
this.path = sanitizePath(path);
}
private String sanitizePath(String path) {
if (!path.startsWith("/")) {
path = "/" + path;
}
if (!path.contains(".")) {
path += ".3gp";
}
return Environment.getExternalStorageDirectory().getAbsolutePath() + path;
}
/**
* Starts a new recording.
*/
public void start() throws IOException {
String state = android.os.Environment.getExternalStorageState();
if(!state.equals(android.os.Environment.MEDIA_MOUNTED)) {
throw new IOException("SD Card is not mounted. It is " + state + ".");
}
// make sure the directory we plan to store the recording in exists
File directory = new File(path).getParentFile();
if (!directory.exists() && !directory.mkdirs()) {
throw new IOException("Path to file could not be created.");
}
recorder.reset();
System.out.println("reset");
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
System.out.println("setAudioSource");
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
System.out.println("setOutputFormat");
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
System.out.println("setAudioEncoder");
recorder.setOutputFile(path);
System.out.println("setOutputFile");
recorder.prepare();
System.out.println("prepare");
recorder.start();
System.out.println("start");
}
/**
* Stops a recording that has been previously started.
*/
public void stop() throws IOException {
recorder.stop();
System.out.println("stopped");
recorder.release();
System.out.println("released");
}
}
我的代码：
import java.io.IOException;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class TestActivity extends Activity implements OnClickListener {
private final String TAG = TestActivity.class.getSimpleName();
Button startRecord;
Button stopRecord;
boolean recordStarted = false;
private static String fileName = "/Recordings/event.3gp";
AudioRecorder audioRecorder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.record);
startRecord = (Button)findViewById(R.id.buttonStartRecord);
stopRecord = (Button)findViewById(R.id.buttonStopRecord);
startRecord.setOnClickListener(this);
stopRecord.setOnClickListener(this);
audioRecorder = new AudioRecorder(fileName);
}
@Override
protected void onResume() {
super.onResume();
Log.d(TAG, "resumed");
}
@Override
protected void onPause() {
super.onPause();
Log.d(TAG, "paused");
}
@Override
public void onClick(View v) {
if (v == startRecord){
try {
audioRecorder.start();
Toast.makeText(this, R.string.msgRecordSuccessful,
Toast.LENGTH_SHORT).show();
recordStarted = true;
Log.e(TAG, String.format("recording: %s", recordStarted));
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(this, R.string.msgRecordFail, Toast.LENGTH_SHORT).show();
}
} else if (v == stopRecord){
if (recordStarted == true) {
try {
audioRecorder.stop();
recordStarted = false;
Log.e(TAG, String.format("recording: %s", recordStarted));
} catch (IOException e) {
e.printStackTrace();
}
} else {
Toast.makeText(this, R.string.msgNotRecording, Toast.LENGTH_SHORT).show();
}
}
} // end onClick
}
XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="start"
android:id="@+id/buttonStartRecord"></Button>
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content" android:id="@+id/buttonStopRecord"
android:text="Stop"></Button>
</LinearLayout>
的字符串：
<string name="msgReset">reset</string>
<string name="msgSetAudioSource">setAudioSource</string>
<string name="msgSetOutputFormat">setOutputFormat</string>
<string name="msgSetAudioEncoder">setAudioEncoder</string>
<string name="msgSetOutputFile">setOutputFile</string>
<string name="msgPrepare">prepare</string>
<string name="msgStart">start</string>
我没有很多编程经验，我不知道这意味着什么，或者如何在Google中搜索这个问题......如果有人能指出一个非常好的大方向：D
谢谢！
------------更新---------------
@Tim 从logcat调试块之后的几行：
INFO/ActivityManager(1362): Process com.bcit.chairlogger (pid 26461) has died.
INFO/WindowManager(1362): WIN DEATH: Window{44f04e20 com.bcit.chairlogger/com.bcit.chairlogger.TestActivity paused=false}
INFO/ActivityManager(1362): Displayed activity com.bcit.chairlogger/.TestActivity: 106629 ms (total 106629 ms)
INFO/UsageStats(1362): Unexpected resume of com.lge.launcher while already resumed in com.bcit.chairlogger
WARN/Flex(1456): getString FLEX_OPERATOR_CODE TLS
WARN/Flex(1456): getString FLEX_OPERATOR_CODE TLS
INFO/#LGIME(1442): #### onStartInput: restarting=false, fieldId=-1
WARN/InputManagerService(1362): Got RemoteException sending setActive(false) notification to pid 26461 uid 10071
答案 0 :(得分：2)
我有同样的错误，解决方案对我有用“和MediaRecorder recorder = new MediaRecorder();在开始时开始（）”（Several audio recording in Android）
答案 1 :(得分：1)
原来这是由于AudioRecorder类。由于新的MediaRecorder对象是在类的开头而不是在“start”方法中创建的，因此每次在“stop”方法中释放该对象，使其无用。
答案 2 :(得分：0)
我通过在停止功能中添加录音机解决了这个问题。
您需要在 stop（）中添加此4行代码，然后才能启动第二个音频剪辑：
myRecorder = new MediaRecorder();
myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myRecorder.setOutputFile(outputFile);
请参阅以下代码：
public void stop(View view) {
try {
myRecorder.stop();
myRecorder.reset();
myRecorder.release();
stopBtn.setEnabled(false);
playBtn.setEnabled(true);
startBtn.setEnabled(true);
myRecorder = new MediaRecorder();
myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myRecorder.setOutputFile(outputFile);
} catch (IllegalStateException e) {
// it is called before start()
e.printStackTrace();
} catch (RuntimeException e) {
// no valid audio/video data has been received
e.printStackTrace();
}
}