[英]Media recorder sound have poor quality
我尝试做的是在将声音上传到 firebase 后录制声音,然后检索到 reciclerview,我可以控制播放/停止和进度。 喜欢 whatsApp 音频消息
class AudioPlayer 通过按下按钮在主活动中调用并返回值以上传 firebase 中的文件。它可以工作,但音质很差,只能在浏览器或直接在源文件夹中工作,否则我无法播放其他格式,如 THREE_GPP,当我直接在源文件夹中播放时。
public class StartRecordMessage extends AppCompatActivity implements Runnable {
private static String fileName = null;
private MediaRecorder myAudioRecorder;
private MediaPlayer player = null;
private boolean permissionToRecordAccepted = false;
private String[] permissions = {Manifest.permission.RECORD_AUDIO};
private final String TAG = "StartRecordMessageClass";
private String audioName = null;
private String externalStoragePath,externalOutputPath,storagePath;
public StartRecordMessage(MediaRecorder myAudioRecorder) {
this.myAudioRecorder = myAudioRecorder;
}
@Override
public void run() {
startRecording();
}
public String startRecording (){
myAudioRecorder = new MediaRecorder();
myAudioRecorder.reset();
myAudioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myAudioRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myAudioRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
{
externalStoragePath = Environment.getExternalStorageDirectory().getAbsolutePath();
externalOutputPath = externalStoragePath + File.separator + "/Android/data/test.mp3";
myAudioRecorder.setOutputFile(externalOutputPath);
}
else
{
storagePath = Environment.getDataDirectory().getAbsolutePath();
myAudioRecorder.setOutputFile(storagePath + "/Android/data/test.mp3");
}
try {
Log.i(TAG, "--------------recording started confirmed" + externalOutputPath + storagePath );
myAudioRecorder.prepare();
myAudioRecorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (externalOutputPath.isEmpty()){
return storagePath;
}else {
return externalOutputPath;
}
}
遵循方法在主要活动中
@Override
public void onRecordingCompleted() {
Log.i(TAG, "---------completed");
startThread = new Thread(new StartRecordMessage(myAudioRecorder));
startThread.start();
startRecordMessage = new StartRecordMessage(myAudioRecorder);
audioMessage = startRecordMessage.startRecording();
Log.i(TAG, "recordingCompleted--------------" + audioMessage);
UploadSound(audioMessage);
}
messageListAdapter.notifyDataSetChanged();
}
音频播放器类
public class AudioPlayer {
public static void play(Context ctx, String path) {
try {
final AudioManager audioManager = (AudioManager) ctx.getSystemService(Context.AUDIO_SERVICE);
final int currentVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
final MediaPlayer mediaPlayer = MediaPlayer.create(ctx, Uri.parse(path));
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
if (!audioManager.isWiredHeadsetOn()) {
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, currentVolume, AudioManager.FLAG_VIBRATE);
}
mp.release();
}
});
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
if (!audioManager.isWiredHeadsetOn()) {
int volume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC) / 2;
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, volume, AudioManager.FLAG_VIBRATE);
}
mp.start();
}
});
} catch(
Throwable e)
{
Log.i("AudioUtil", "Unable to play: " + path, e);
}
}
}
适配器类
holder.playStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
clickCount++;
if (clickCount==1) {
isPlayng=true;
holder.playStop.setBackgroundResource(R.drawable.ic_pause);
Log.i(TAG,"audio url---------------" + audio);
audioPlayer = new AudioPlayer();
audioPlayer.play(context,audio);
Log.i(TAG, "Media player ------------"+ clickCount + " is play: " +isPlayng);
}
if (clickCount>1){
isPlayng=false;
clickCount=0;
holder.playStop.setBackgroundResource(R.drawable.ic_play);
Log.i(TAG, "Media player ------------" + clickCount + " is play: " + isPlayng);
}
}
});
当我想播放声音时会触发跟随错误。 class 音频播放器 class 在适配器 class 中被调用,但问题是 url。
https://firebasestorage.googleapis.com/v0/b/chat-b18d3.appspot.com/o/Audio%..... 2020-11-12 22:59:44.739 2621-2621 I/AudioUtil:无法播放: https://firebasestorage.googleapis.com/v0/b/chat-b18d3.appspot.com/o/Audio%... . . java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference at com.example....ChatRecord.AudioPlayer.play (AudioPlayer.java:13) at com.example.chatMapOriginal.Profile.Chat.MyGroups.GroupChatAdapter$1.onClick(GroupChatAdapter.java:137) at android.view.View.performClick(View.java:7192) at android.view .View.performClickInternal(View.java:7166) at android.view.View.access$3500(View.java:824) at android.view.View$PerformClick.run(View.java:27592) at android.os.Handler .handleCallback(Handler.java:888) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:213) at android.app.ActivityThread.main(ActivityThread. java:8178) 在 8821324 6945888.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)
尝试在您的媒体文件中添加值。
例如。
// Setup values for the media file
ContentValues values = new ContentValues(4);
long current = System.currentTimeMillis();
values.put(MediaStore.Audio.Media.TITLE, "audio file");
values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000));
values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp");
values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath());
ContentResolver contentResolver = getContentResolver();
// Construct uris
Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Uri newUri = contentResolver.insert(base, values);
// Trigger broadcast to add
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));
Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show();
这段代码来自这里
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