[英]Android - Playing MP4 video file from an expansion file
我已经按照测试应用程序扩展文件的所有步骤进行了操作。 我现在被困在哪里是如何播放该扩展文件中包含的视频文件。
我已经成功地从Google Play下载了它,当我浏览文件管理器时,我可以在它应该位于的文件夹中看到它。
在过去的几天里,我一直试图弄清楚如何播放文件。 目前只有一个,以保持适当的测试尺寸。
我试图解析URI并在视频视图中设置它,但是,它始终显示无法播放视频。
到目前为止,我还尝试过这段代码来访问它(如文档中所述,我已经用参数替换了参数):
// Get a ZipResourceFile representing a merger of both the main and patch files
ZipResourceFile expansionFile = APKExpansionSupport.getAPKExpansionZipFile(appContext,
mainVersion, patchVersion);
// Get an input stream for a known file inside the expansion file ZIPs
InputStream fileStream = expansionFile.getInputStream(pathToFileInsideZip);
我如何处理输入流才能播放视频?
public class EHZipUriProvider extends APEZProvider {
@Override
public String getAuthority() {
// TODO Auto-generated method stub
return "your.package.name.Utility.EHZipUriProvider";
}
}
public static final Uri CONTENT_URI = Uri
.parse("content://your.package.name.Utility.EHZipUriProvider");
public static VideoView mview;
public static void playVideo(Context context, VideoView resource, String VIDEO_NAME) {
position = 0;
mview = resource;
Uri video = Uri.parse((CONTENT_URI + "/" + VIDEO_NAME));
mview.setVideoURI(video);
mview.start();
mview.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
mview = null;
}
});
}
VideoPlayer.playVideo(context, vv, "rulesofenglish.mp4");
例如,我的应用程序包名称是:
com.bluewindsolution.android.sampleapp
然后我的扩展文件应该是
main.1.com.bluewindsolution.android.sampleapp.obb
详细信息,您可以在此处关注 :
[main | patch]。<expansion-version>。<package-name> .obb
从扩展开始,您可以通过三种方式获得它:
通过AssetFileDescriptor
// This one works with an image file and a media file.
// Get a ZipResourceFile representing a specific expansion file
// mainContext, version number of your main expansion, version number of your patch
ZipResourceFile expansionFile = APKExpansionSupport.getAPKExpansionZipFile(this, 1, 0);
AssetFileDescriptor afd_img1 = expansionFile.getAssetFileDescriptor("your_path/your_file.jpg");
AssetFileDescriptor afd_mpbg = expansionFile.getAssetFileDescriptor("your_path/your_file.mp3");
// To set image
ImageView imageView1 = (ImageView)findViewById(R.id.iv1);
imageView1.setImageBitmap(BitmapFactory.decodeFileDescriptor(afd_iv1.getFileDescriptor()));
// To set sound
try {
mpbg.setDataSource(afd_mpbg.getFileDescriptor(), afd_mpbg.getStartOffset(), afd_mpbg.getDeclaredLength());
mpbg.prepareAsync();
mpbg.start();
} catch (IllegalStateException e) {
Log.w("Error=====", "Failed to prepare media player", e);
}
通过InputStream:
// This one works with an image file and a media file.
// Get a ZipResourceFile representing a specific expansion file
ZipResourceFile expansionFile = new ZipResourceFile(filePathToMyZip);
// Get an input stream for a known file inside the expansion file ZIPs
InputStream fileStream = expansionFile.getInputStream(pathToFileInsideZip);
// This one can use in almost thing such as jpg, mp3, mp4, pdf, etc.
// You need to create a new class to override APEZProvider
public class ZipFileContentProvider extends APEZProvider {
@Override
public String getAuthority() {
return "com.bluewindsolution.android.sampleapp";
}
}
// You need to add <provider> in AndroidManifest.xml
<provider
android:name="com.bluewindsolution.android.sampleapp.ZipFileContentProvider"
android:authorities="com.bluewindsolution.android.sampleapp"
android:exported="false"
android:multiprocess="true"
>
<meta-data android:name="mainVersion"
android:value="1"></meta-data>
</provider>
// After that, you can use it any time by this code:
String filename2 = "image/i_commu_a_1_1_1_1.jpg"; // suppose you store put your file in directory in .obb
String uriString2 = "content://com.bluewindsolution.android.sampleapp" + File.separator + filename2;
Uri uri2 = Uri.parse(uriString2);
imageView2.setImageURI(uri2);
// Filename inside my expansion file
String filename = "video/v_do_1_1_1.mp4"; // Suppose you store put your file in directory in .obb
String uriString = "content://com.bw.sample_extension_download_main" + File.separator + filename;
Uri uri = Uri.parse(uriString);
v1 = (VideoView)findViewById(R.id.videoView1);
v1.setVideoURI(uri);
v1.start();
使用提供商(对我来说是最好的解决方案)! 我测试了它,它完美无缺。
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