从Firebase存储下载并播放.mp3文件到内存 [英] Download and play .mp3 file from firebase storage to memory

问题描述

我需要从我的Firebase存储gs://fir-b9532.appspot.com/songs/song1.mp3下载一个mp3文件，然后将其播放到我的android应用程序中. 我想将mp3临时文件存储在设备的内存中，然后用Media Player播放，然后带来一首新歌.

I need to download an mp3 file from my firebase storage gs://fir-b9532.appspot.com/songs/song1.mp3 and play it into my android application. I want to store the mp3 file temporary in my device's memory, play it with a mediaplayer and then bring a new song.

我遵循firebase手册编写以下简单代码，但似乎不起作用.有想法出什么问题了吗?

I follow the firebase manual writing the following simple code but seems not working. ANy ideas whats going wrong?

package com.example.andreaskonstantakos.firebase;

 import android.media.MediaPlayer;
 import android.support.annotation.NonNull;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import com.google.android.gms.tasks.OnFailureListener;
 import com.google.android.gms.tasks.OnSuccessListener;
 import com.google.firebase.storage.FirebaseStorage;
 import com.google.firebase.storage.StorageReference;


 public class MainActivity extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         FirebaseStorage storage = FirebaseStorage.getInstance();

         StorageReference storageRef = storage.getReference();
         StorageReference songsRef = storageRef.child("songs");
         StorageReference song1Ref = storageRef.child("songs/song1.mp3");

         final long ONE_MEGABYTE = 1024 * 1024;
         song1Ref.getBytes(ONE_MEGABYTE).addOnSuccessListener(new OnSuccessListener<byte[]>() {
             @Override
             public void onSuccess(byte[] bytes) {
                 // Data for "songs/song1.mp3" is returns, use this as needed
                 MediaPlayer md = MediaPlayer.create(MainActivity.this,R.id.bytes);
                 md.setLooping(false);
                 md.start();
             }
    }).addOnFailureListener(new OnFailureListener() {
             @Override
             public void onFailure(@NonNull Exception exception) {
                 // Handle any errors
        }
    });

}


 }

推荐答案

我找到了另一种解决方案，而不是下载音频文件并将其临时保存在内存中，而是通过将流媒体从Firebase存储提供的完整URL实时流式传输(" https://firebasestorage.googleapis.com/v0/b/fir-b9532.appspot.com/o/songs%2Fsong1.mp3?alt=media&token=a4424b28-93c3-4a0c-a6b9 -9136dcf63335 ").

Instead of downloading the audio file and temporarly keep it on the memory i found another solution by live-streaming the song from the full URL that firebase storage provide ("https://firebasestorage.googleapis.com/v0/b/fir-b9532.appspot.com/o/songs%2Fsong1.mp3?alt=media&token=a4424b28-93c3-4a0c-a6b9-9136dcf63335").

我只是这样加载我的MediaPlayer:

I just load my MediaPlayer like this:

try {
        MediaPlayer player = new MediaPlayer();
        player.setAudioStreamType(AudioManager.STREAM_MUSIC);
        player.setDataSource("https://firebasestorage.googleapis.com/v0/b/fir-b9532.appspot.com/o/songs%2Fsong1.mp3?alt=media&token=a4424b28-93c3-4a0c-a6b9-9136dcf63335");
        player.prepare();
        player.start();
    } catch (Exception e) {
        // TODO: handle exception
    }

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