MediaSession在锁定屏幕上不显示背景

问题描述

我在Lollipop上使用MediaSession来控制播放.之所以可以使用它，是因为我的Android Wear设备允许我控制播放，但是手机锁定屏幕上没有显示METADATA_KEY_ALBUM_ART_URI中的图像，并且Android Wear上的背景也没有显示.我正在使用自己的自定义通知(不是媒体样式通知).这是我的MediaSession代码.

I am using MediaSession on Lollipop to control playback. It appears to work because my Android Wear device allows me to control playback, however the phone lock screen isn't showing the image from METADATA_KEY_ALBUM_ART_URI and the background on Android Wear isn't showing either. I am using my own custom notification (not media style notification). Here is my MediaSession code.

if (mediaSession == null) {
            mediaSession = new MediaSession(this, TAG);


            mediaSession.setCallback(new MediaSessionCallback());
        }
        mediaSession.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS | MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);

        MediaMetadata.Builder metadataBuilder = new MediaMetadata.Builder();
        metadataBuilder.putString(MediaMetadata.METADATA_KEY_TITLE, getMediaTitle());
        if (imageURL != null) {

            metadataBuilder.putString(MediaMetadata.METADATA_KEY_ALBUM_ART_URI, imageURL);
        }

        mediaSession.setMetadata(metadataBuilder.build());
        PlaybackState.Builder stateBuilder = new PlaybackState.Builder();
        stateBuilder.setActions(PlaybackState.ACTION_PLAY | PlaybackState.ACTION_PLAY_PAUSE | PlaybackState.ACTION_PAUSE | PlaybackState.ACTION_REWIND | PlaybackState.ACTION_FAST_FORWARD);

        stateBuilder.setState(playStateStatus == Paused ? PlaybackState.STATE_PAUSED : PlaybackState.STATE_PLAYING, PlaybackState.PLAYBACK_POSITION_UNKNOWN, 1.0f);

        mediaSession.setPlaybackState(stateBuilder.build());
        mediaSession.setActive(true);

谢谢.

推荐答案

答案似乎是使用MediaMetadata.METADATA_KEY_ALBUM_ART，所以我不确定METADATA_KEY_ALBUM_ART_URI的含义是什么.

Looks like the answer is using MediaMetadata.METADATA_KEY_ALBUM_ART so I'm not sure what the point of METADATA_KEY_ALBUM_ART_URI is.

metadataBuilder.putBitmap(MediaMetadata.METADATA_KEY_ALBUM_ART，位图);

metadataBuilder.putBitmap(MediaMetadata.METADATA_KEY_ALBUM_ART, bitmap);

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