*您正在开发一个应用程序。在那里录制来电和去电，它将显示在列表视图中。如何找到录制文件大小（例如kb或字节）。 任何人都可以为编程提供解决方案。
public class RecordService extends Service implements MediaRecorder.OnInfoListener,
MediaRecorder.OnErrorListener
{
private static final String TAG = "CallRecorder";
public static final String DEFAULT_STORAGE_LOCATION = "/sdcard/callrecorder";
private static final int RECORDING_NOTIFICATION_ID = 1;
private MediaRecorder recorder = null;
private boolean isRecording = false;
private File recording = null;;
private File makeOutputFile (SharedPreferences prefs)
{
File dir = new File(DEFAULT_STORAGE_LOCATION);
// test dir for existence and writeability
if (!dir.exists()) {
try {
dir.mkdirs();
} catch (Exception e) {
Log.e("CallRecorder", "RecordService:makeOutputFile unable to create directory " + dir + ": " + e);
Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to create the directory " + dir + " to store recordings: " + e, Toast.LENGTH_LONG);
t.show();
return null;
}
} else {
if (!dir.canWrite()) {
Log.e(TAG, "RecordService:makeOutputFile does not have write permission for directory: " + dir);
Toast t = Toast.makeText(getApplicationContext(), "CallRecorder does not have write permission for the directory directory " + dir + " to store recordings", Toast.LENGTH_LONG);
t.show();
return null;
}
}
String prefix = "call";
int audiosource = Integer.parseInt(prefs.getString(Preferences.PREF_AUDIO_SOURCE, "1"));
prefix += "-" + audiosource ;
String suffix = "";
int audioformat = Integer.parseInt(prefs.getString(Preferences.PREF_AUDIO_FORMAT, "1"));
switch (audioformat) {
case MediaRecorder.OutputFormat.THREE_GPP:
suffix = ".3gpp";
break;
case MediaRecorder.OutputFormat.MPEG_4:
suffix = ".mpg";
break;
case MediaRecorder.OutputFormat.RAW_AMR:
suffix = ".amr";
break;
}
try {
return File.createTempFile(prefix, suffix, dir);
} catch (IOException e) {
Log.e("CallRecorder", "RecordService:makeOutputFile unable to create temp file in " + dir + ": " + e);
Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to create temp file in " + dir + ": " + e, Toast.LENGTH_LONG);
t.show();
return null;
}
}
public void onCreate()
{
super.onCreate();
recorder = new MediaRecorder();
Log.i("CallRecorder", "onCreate created MediaRecorder object");
}
@SuppressLint("ShowToast")
public void onStart(Intent intent, int startId) {
Log.i("CallRecorder", "RecordService:onStartCommand called while isRecording:" + isRecording);
if (isRecording) return;
Context c = getApplicationContext();
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(c);
Boolean shouldRecord = prefs.getBoolean(Preferences.PREF_RECORD_CALLS, false);
if (!shouldRecord) {
Log.i("CallRecord", "RecordService:onStartCommand with PREF_RECORD_CALLS false, not recording");
return;
}
int audiosource = Integer.parseInt(prefs.getString(Preferences.PREF_AUDIO_SOURCE, "1"));
int audioformat = Integer.parseInt(prefs.getString(Preferences.PREF_AUDIO_FORMAT, "1"));
recording = makeOutputFile(prefs);
if (recording == null) {
recorder = null;
return; //return 0;
}
Log.i("CallRecorder", "RecordService will config MediaRecorder with audiosource: " + audiosource + " audioformat: " + audioformat);
try {
recorder.reset();
recorder.setAudioSource(audiosource);
Log.d("CallRecorder", "set audiosource " + audiosource);
recorder.setOutputFormat(audioformat);
Log.d("CallRecorder", "set output " + audioformat);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
Log.d("CallRecorder", "set encoder default");
recorder.setOutputFile(recording.getAbsolutePath());
Log.d("CallRecorder", "set file: " + recording);
recorder.setOnInfoListener(this);
recorder.setOnErrorListener(this);
try {
recorder.prepare();
} catch (java.io.IOException e) {
Log.e("CallRecorder", "RecordService:onStart() IOException attempting recorder.prepare()\n");
Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to start recording: " + e, Toast.LENGTH_LONG);
t.show();
recorder = null;
return; //return 0; //START_STICKY;
}
Log.d("CallRecorder", "recorder.prepare() returned");
recorder.start();
isRecording = true;
Log.i("CallRecorder", "recorder.start() returned");
updateNotification(true);
if(recording==null)
{
Toast.makeText(getApplicationContext(), "settings", 1000).show();
recording.delete();
Log.v("recording", "settings" +recording);
}
} catch (java.lang.Exception e) {
Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to start recording: " + e, Toast.LENGTH_LONG);
t.show();
Log.e("CallRecorder", "RecordService:onStart caught unexpected exception", e);
recorder = null;
}
return;
}
public void onDestroy()
{
super.onDestroy();
if (null != recorder) {
Log.i("CallRecorder", "RecordService:onDestroy calling recorder.release()");
isRecording = false;
recorder.release();
Toast t = Toast.makeText(getApplicationContext(), "CallRecorder finished recording call to " + recording, Toast.LENGTH_LONG);
t.show();
}
updateNotification(false);
}
// methods to handle binding the service
public IBinder onBind(Intent intent)
{
return null;
}
public boolean onUnbind(Intent intent)
{
return false;
}
public void onRebind(Intent intent)
{
}
private void updateNotification(Boolean status)
{
Context c = getApplicationContext();
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(c);
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
if (status) {
int icon = R.drawable.ic_launcher;
CharSequence tickerText = "Recording call " + prefs.getString(Preferences.PREF_AUDIO_SOURCE, "1");
//CharSequence tickerText = "Recording call " + prefs.getString(Preferences.PREF_AUDIO_SOURCE, "1");
long when = System.currentTimeMillis();
//Notification notification = new Notification(icon, tickerText, when);
Notification notification=new Notification(icon,tickerText,when);
Context context = getApplicationContext();
CharSequence contentTitle = "CallRecorder Status";
CharSequence contentText = "Recording call...";
Intent notificationIntent = new Intent(this, RecordService.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
mNotificationManager.notify(RECORDING_NOTIFICATION_ID, notification);
} else {
mNotificationManager.cancel(RECORDING_NOTIFICATION_ID);
}
}
// MediaRecorder.OnInfoListener
public void onInfo(MediaRecorder mr, int what, int extra)
{
Log.i("CallRecorder", "RecordService got MediaRecorder onInfo callback with what: " + what + " extra: " + extra);
isRecording = false;
}
// MediaRecorder.OnErrorListener
public void onError(MediaRecorder mr, int what, int extra)
{
Log.e("CallRecorder", "RecordService got MediaRecorder onError callback with what: " + what + " extra: " + extra);
Toast.makeText(getApplicationContext(), "recording not poossible plese chenge the settings", 1000).show();
isRecording = false;
mr.release();
}
} *
答案 0 :(得分：0)
AssetFileDescriptor sampleFD = getResources().openRawResourceFd(R.raw.audio);
long size = sampleFD.getLength()
InputStream ins = context.getResources().openRawResource (R.raw.audio);
int size = ins.available();
答案 1 :(得分：0)
试试这个 -
float file_size = Float.parseFloat(String.valueOf(filenew.length()/1024));
Double d=(double) (file_size/1000);
DecimalFormat df = new DecimalFormat("#.##");
size.setText(df.format(d)+" MB");
答案 2 :(得分：0)
使用这个来获取kb文件的大小
try{
File file = new File("/sdcard/my_recording.amr");
long length = file.length();
length = length/1024;
System.out.println("File Path : " + file.getPath() + ", File size : " + length +" KB");
}catch(Exception e){
System.out.println("File not found : " + e.getMessage() + e);
}