Question

假设我将视频下载到/storage/9C33-6BBD/Downloads/video.mp4。如何从我的应用中打开此视频？ SDK 23 +

我试过了：

                File file = new File("/storage/9C33-6BBD/Downloads/video.mp4");
                String packageName = context.getApplicationContext().getPackageName();
                Uri uri = FileProvider.getUriForFile(context, myprovider,
                        file);
                Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                context.startActivity(intent);

但是随着以下崩溃失败了。我做错了什么？

04-10 02:55:49.889 28144-28144/com.example.one E/AndroidRuntime: FATAL EXCEPTION: main
                                                                  Process: com.example.one, PID: 28144
                                                                  java.lang.IllegalArgumentException: Failed to find configured root that contains /storage/9C33-6BBD/Downloads/video.mp4
                                                                      at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:738)
                                                                      at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:417)
                                                                      at com.example.DownloadAdapter$ViewHolder.onClick(DownloadAdapter.java:385)
                                                                      at android.view.View.performClick(View.java:5612)
                                                                      at android.view.View$PerformClick.run(View.java:22285)
                                                                      at android.os.Handler.handleCallback(Handler.java:751)
                                                                      at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                      at android.os.Looper.loop(Looper.java:154)
                                                                      at android.app.ActivityThread.main(ActivityThread.java:6123)
                                                                      at java.lang.reflect.Method.invoke(Native Method)
                                                                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
                                                                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)

Answer 1

FileProvider不支持可移动存储。您需要为此创建自己的ContentProvider。或者，切换到使用Storage Access Framework，因为我不太确定您是如何下载到可移动存储的。

Answer 2

这就是我最终要做的事情。媒体uri非常适合我的目的，你可以通过MediaScannerConnection获得它。

            MediaScannerConnection.scanFile(
                    service.getApplicationContext(),
                    new String[] { file.getAbsolutePath() },
                    null,
                    new MediaScannerConnection.OnScanCompletedListener() {
                        @Override
                        public void onScanCompleted(String path, Uri uri) {
                            Log.d(TAG, "file " + path + " was scanned seccessfully: "
                                    + uri);
                            // Do your stuff here. What I did was to do the scan
                            // right after the download and save the uri to my 
                            // database. So I can open this uri later.
                        }
                    });

为外部SD卡或可移动存储中的文件生成内容URI

2 个答案: