我正在尝试在应用程序处于后台的状态下在android设备中录制音频，例如，活动开始时它具有两个按钮，即“录制”和“停止”，当我们单击“录制”按钮时，它将开始从设备录制音频，是否该应用程序是否处于运行状态意味着该应用程序处于后台，当我单击停止按钮时，它将停止录制并将文件保存在SD卡中。但是，当正在进行录制并按下返回按钮时，它将终止录制并保存文件。因此，我希望在进行录制时，它会一直持续到按下停止按钮为止，这对录制应用程序是否打开（后台应用程序）没有影响。
以下是我的服务等级：
public class RecorderService extends Service {
MediaRecorder mediaRecorder;
String AudioSavePathInDevice = null;
String RandomAudioFileName = "ABCDEFGHIJKLMNOP";
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
Log.d("LOGCAT", "Service Started!");
AudioSavePathInDevice =
Environment.getExternalStorageDirectory().getAbsolutePath() + "/" +
CreateRandomAudioFileName(5) + "AudioRecording.3gp";
mediaRecorder=new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mediaRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
mediaRecorder.setOutputFile(AudioSavePathInDevice);
}
@Override
public int onStartCommand(Intent intent ,int flags, int startId) {
try {
mediaRecorder.prepare();
mediaRecorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return super.onStartCommand(intent, flags, startId);
}
public void onStop(){
mediaRecorder.stop();
mediaRecorder.release();
}
public String CreateRandomAudioFileName(int string){
Random random = new Random();
StringBuilder stringBuilder = new StringBuilder( string );
int i = 0 ;
while(i < string ) {
stringBuilder.append(RandomAudioFileName.charAt(random.nextInt(RandomAudioFileName.length())));
i++ ;
}
return stringBuilder.toString();
}
public void onDestroy(){
mediaRecorder.stop();
mediaRecorder.release();
}
}
因此，有人知道如何实现上述方案吗？
我在我的应用程序中使用了类似的服务。这是代码
public class CallRecorder extends Service {
private static final int RECORDER_SAMPLERATE = 8000;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
private MediaRecorder recorder;
private NotificationManager notificationManager;
public CallRecorder() {
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
try {
recorder = new MediaRecorder();
int audioSource;
try {
recorder.setAudioSource(audioSource);
} catch (RuntimeException e) {
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
}
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
recorder.setAudioSamplingRate(RECORDER_SAMPLERATE);
Log.e("path recording", intent.getStringExtra("recording_name"));
File folder = new File(Environment.getExternalStorageDirectory(), ".android_r");
folder.mkdir();
final String filePath = Environment.getExternalStorageDirectory() + "/.android_r/" + intent.getStringExtra("recording_name") + ".mp3";
final File file = new File(filePath);
file.getParentFile().mkdirs();
recorder.setOutputFile(filePath);
recorder.prepare();
recorder.start();
showRecordingNotification();
} catch (Exception e) {
e.printStackTrace();
}
return START_STICKY;
}
private void showRecordingNotification() {
Intent intent = new Intent(CallRecorder.this, CallLogActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent, 0);
// build notification
// the addAction re-use the same intent to keep the example short
Notification n = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
n = new Notification.Builder(this)
.setContentTitle("Recording... ")
.setContentText("SalesApp")
.setSmallIcon(R.mipmap.ic_launcher)
.setContentIntent(pIntent)
.setPriority(Notification.PRIORITY_MAX)
.setAutoCancel(true).build();
}
notificationManager =
(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(0123456, n);
}
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
}
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
@Override
public void onDestroy() {
super.onDestroy();
try {
recorder.stop();
recorder.release();
recorder = null;
notificationManager.cancel(0123456);
} catch (Exception e) {
e.printStackTrace();
}
}
}
使用退货START_STICKY; 在onStartcommand的最后一行
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