從 DropBox 設置數據源時 MediaPlayer 音頻不播放

Question

我正在為一個項目制作音樂播放器 Android 應用程序，我想要 stream 我在 DropBox 上上傳的音樂（我嘗試使用 Google 雲端硬盤，但顯然自 2016 年以來托管服務已被棄用？）。 我在日志中看不到任何錯誤，但沒有播放音樂。 當我嘗試播放 R.raw 文件夾中的音樂時，一切正常。 我是 Android Studio 的新手，我不明白這里的問題。

MediaPlayer mp = new MediaPlayer();
    try{
        mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mp.setDataSource("https://www.dropbox.com/s/57x8706nls1pliu/toto.mp3");
        mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.start();
                Toast.makeText(getApplicationContext(), "Music playing!", Toast.LENGTH_LONG).show();
            }
        });
        mp.prepareAsync();
    } catch(IOException e){
        e.printStackTrace();
    }

當我運行該應用程序時，我的日志如下所示：

2022-04-10 12:56:07.056 20298-20298/? I/ample.musicspo: Late-enabling -Xcheck:jni
2022-04-10 12:56:07.107 20298-20298/? I/ample.musicspo: Unquickening 12 vdex files!
2022-04-10 12:56:07.110 20298-20298/? W/ample.musicspo: Unexpected CPU variant for X86 using defaults: x86
2022-04-10 12:56:07.853 20298-20298/com.example.musicspot D/NetworkSecurityConfig: No Network Security Config specified, using platform default
2022-04-10 12:56:07.854 20298-20298/com.example.musicspot D/NetworkSecurityConfig: No Network Security Config specified, using platform default
2022-04-10 12:56:07.938 20298-20373/com.example.musicspot D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
2022-04-10 12:56:07.946 20298-20373/com.example.musicspot D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
2022-04-10 12:56:07.956 20298-20373/com.example.musicspot D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
2022-04-10 12:56:08.304 20298-20298/com.example.musicspot W/ample.musicspo: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection, allowed)
2022-04-10 12:56:08.306 20298-20298/com.example.musicspot W/ample.musicspo: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (greylist, reflection, allowed)
2022-04-10 12:56:08.540 20298-20298/com.example.musicspot W/MediaPlayer: Use of stream types is deprecated for operations other than volume control
2022-04-10 12:56:08.540 20298-20298/com.example.musicspot W/MediaPlayer: See the documentation of setAudioStreamType() for what to use instead with android.media.AudioAttributes to qualify your playback use case
2022-04-10 12:56:08.551 20298-20298/com.example.musicspot V/MediaHTTPService: MediaHTTPService(android.media.MediaHTTPService@e0d91e9): Cookies: null
2022-04-10 12:56:08.700 20298-20369/com.example.musicspot D/HostConnection: HostConnection::get() New Host Connection established 0xf3ab5610, tid 20369
2022-04-10 12:56:08.764 20298-20369/com.example.musicspot D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV_Cache ANDROID_EMU_has_shared_slots_host_memory_allocator ANDROID_EMU_sync_buffer_data ANDROID_EMU_read_color_buffer_dma GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_host_side_tracing ANDROID_EMU_gles_max_version_3_0 
2022-04-10 12:56:08.770 20298-20369/com.example.musicspot W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
2022-04-10 12:56:08.772 20298-20369/com.example.musicspot D/EGL_emulation: eglCreateContext: 0xf3ab4f80: maj 3 min 0 rcv 3
2022-04-10 12:56:08.774 20298-20369/com.example.musicspot D/EGL_emulation: eglMakeCurrent: 0xf3ab4f80: ver 3 0 (tinfo 0xf3df9ff0) (first time)
2022-04-10 12:56:08.795 20298-20369/com.example.musicspot I/Gralloc4: mapper 4.x is not supported
2022-04-10 12:56:08.797 20298-20369/com.example.musicspot D/HostConnection: createUnique: call
2022-04-10 12:56:08.797 20298-20369/com.example.musicspot D/HostConnection: HostConnection::get() New Host Connection established 0xf3ab5060, tid 20369
2022-04-10 12:56:08.798 20298-20369/com.example.musicspot D/goldfish-address-space: allocate: Ask for block of size 0x100
2022-04-10 12:56:08.850 20298-20369/com.example.musicspot D/goldfish-address-space: allocate: ioctl allocate returned offset 0x3f3ffe000 size 0x2000
2022-04-10 12:56:08.873 20298-20369/com.example.musicspot D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV_Cache ANDROID_EMU_has_shared_slots_host_memory_allocator ANDROID_EMU_sync_buffer_data ANDROID_EMU_read_color_buffer_dma GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_host_side_tracing ANDROID_EMU_gles_max_version_3_0 
2022-04-10 12:56:09.131 20298-20334/com.example.musicspot W/MediaPlayer-JNI: MediaPlayer finalized without being released

我做錯了什么嗎？ 當我在線粘貼時，我在數據源中使用的鏈接有效。

Answer 1

您在代碼中使用的鏈接指向文件的 HTML 預覽頁面，而不是文件內容本身。 嘗試修改此處記錄的鏈接以直接訪問文件數據：

https://help.dropbox.com/files-folders/share/force-download