启动 VLC for Android 的 VideoPlayerActivity 时,我无法设置字幕位置。我的目标是 API 27 并使用 FileProvider 来允许访问文件。
根据此处的文档,如果您额外设置了“subtitles_location”,那么您可以提供字幕文件的路径。不幸的是,我似乎无法让它发挥作用。
我看到“字幕”菜单项仍然灰显,下载字幕似乎并没有改变这种状态。点击时,“选择字幕文件”VLC 指出目录中没有字幕文件,并且 URI 以“content://”为前缀,如预期的那样。
视频文件和字幕文件共享相同的父目录,并使用 FileProvider 提供。
面向 API >= 24 时如何设置字幕文件?
更新:
- 似乎在点击字幕选择菜单项时,它使用了视频文件的父目录。这是在这里看到的。
- 想通了,请参阅下面的解决方案。
下面是一些关于我如何通过意图启动 VideoPlayerActivity 的代码片段。
播放视频方法:
/**
* Play a video using VLC media player. This method will play media by using
* the VLC VideoPlayerActivity.
*
* @param activity The current activity.
* @param authority The FileProvider authority.
* @param vlcPackageName The VLC package name.
* @param vlcActivityName The VLC activity name.
* @param videoFile The video file to play.
* @param subtitlesFile The subtitles file to play.
* @param playbackPosition The playback position.
* @param requestCode The activity for result request code.
*/
public static void playVideo(
AppCompatActivity activity,
String authority,
String vlcPackageName,
String vlcActivityName,
String vlcTitleExtra,
String vlcPositionExtra,
String vlcFromStartExtra,
String vlcSubtitlesExtra,
File videoFile,
File subtitlesFile,
long playbackPosition,
int requestCode
) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setPackage(vlcPackageName);
// Set component to VLC video player activity.
intent.setComponent(new ComponentName(
vlcPackageName,
vlcActivityName
));
// Set intent permission flags.
intent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_PREFIX_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
// Set title and playback position.
intent.putExtra(vlcTitleExtra, videoFile.getName());
intent.putExtra(vlcPositionExtra, playbackPosition);
intent.putExtra(vlcFromStartExtra, false);
// Set video file location
intent.setDataAndTypeAndNormalize(
FileProvider.getUriForFile(
activity,
authority,
videoFile
),
"video/*"
);
// Subtitles file provided, set location on intent.
if (subtitlesFile != null) {
intent.putExtra(
vlcSubtitlesExtra,
FileProvider.getUriForFile(
activity,
authority,
subtitlesFile
)
);
}
activity.startActivityForResult(intent, requestCode);
}
清单中的提供者定义
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.masterwok.bitcast.fileprovider"
android:exported="false"
android:grantUriPermissions="true" >
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/paths" />
</provider>
@xml/paths 定义:
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path
name="Download"
path="Download/"/>
</paths>