Android初学者求Parse Server相册视频上传完整可行教程

Hey there! Glad you're diving into Android development and Parse Server—let's turn your video picker code into a complete upload workflow. I'll break this down into simple, beginner-friendly steps:

You've already got the intent to pick a video set up, so next we need to catch the result once the user selects a video. In your Activity, override the onActivityResult method (note: if you're using AndroidX, the newer registerForActivityResult API is recommended, but we'll stick with your current approach first):

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    // Check if this is our video pick request and the selection was successful
    if (requestCode == 1 && resultCode == RESULT_OK && data != null) {
        Uri selectedVideoUri = data.getData();
        // Pass the URI to our upload method
        uploadVideoToParse(selectedVideoUri);
    }
}

The URI we get from the media picker isn't always a direct file path, so we need a helper method to get the actual path of the video file:

private String getRealVideoPath(Uri videoUri) {
    String[] projection = {MediaStore.Video.Media.DATA};
    Cursor cursor = getContentResolver().query(videoUri, projection, null, null, null);
    
    if (cursor == null) {
        Toast.makeText(this, "Could not access video file", Toast.LENGTH_SHORT).show();
        return null;
    }
    
    int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
    cursor.moveToFirst();
    String videoPath = cursor.getString(columnIndex);
    cursor.close();
    return videoPath;
}

Now we'll create a ParseFile from the video, upload it, and optionally attach it to a ParseObject (to keep track of metadata like who uploaded it, video name, etc.):

private void uploadVideoToParse(Uri videoUri) {
    String videoPath = getRealVideoPath(videoUri);
    if (videoPath == null) return;

    File videoFile = new File(videoPath);
    ParseFile parseVideoFile;

    try {
        // Create ParseFile from the video input stream
        parseVideoFile = new ParseFile(videoFile.getName(), new FileInputStream(videoFile));
    } catch (FileNotFoundException e) {
        e.printStackTrace();
        Toast.makeText(this, "Failed to read video file", Toast.LENGTH_SHORT).show();
        return;
    }

    // First upload the raw video file to Parse
    parseVideoFile.saveInBackground(new SaveCallback() {
        @Override
        public void done(ParseException e) {
            if (e == null) {
                // File uploaded successfully! Now attach it to a ParseObject for context
                ParseObject userVideo = new ParseObject("UserVideos");
                userVideo.put("videoFile", parseVideoFile);
                // Add optional metadata (adjust these to your needs)
                userVideo.put("uploadedBy", ParseUser.getCurrentUser()); // If you're using user auth
                userVideo.put("videoName", videoFile.getName());

                // Save the object with attached video to Parse Server
                userVideo.saveInBackground(new SaveCallback() {
                    @Override
                    public void done(ParseException e) {
                        if (e == null) {
                            Toast.makeText(MainActivity.this, "Video uploaded successfully!", Toast.LENGTH_LONG).show();
                        } else {
                            Toast.makeText(MainActivity.this, "Failed to save video data: " + e.getMessage(), Toast.LENGTH_SHORT).show();
                        }
                    }
                });
            } else {
                Toast.makeText(MainActivity.this, "Failed to upload video: " + e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }
    });
}

• Parse Initialization: Don't forget to initialize Parse in your app's onCreate (either in an Application class or your main Activity):

  Parse.initialize(new Parse.Configuration.Builder(this)
          .applicationId("YOUR_APP_ID")
          .clientKey("YOUR_CLIENT_KEY") // Skip this if your server doesn't use a client key
          .server("YOUR_PARSE_SERVER_ENDPOINT/parse/") // e.g., "https://your-server.com/parse/"
          .build());
  

• Permissions for Android 10+: If you're targeting API 29 or higher, add android:requestLegacyExternalStorage="true" to your <application> tag in AndroidManifest.xml—this lets the app access the file path using our helper method.
• Progress Tracking: For large videos, add a progress indicator using the ProgressCallback:

  parseVideoFile.saveInBackground(saveCallback, new ProgressCallback() {
      @Override
      public void done(Integer percentDone) {
          // Update a progress bar or log here, e.g.:
          Log.d("Upload", "Progress: " + percentDone + "%");
      }
  });
  

• Error Handling: The toasts are basic—you can expand this with more user-friendly messages or logging for debugging.

内容的提问来源于stack exchange，提问作者user1906431