Android Widget中如何通过代码设置secondaryProgress？

Got it, let's tackle this problem together—since RemoteViews has limited direct support for secondary progress in app widgets, here are a few practical workarounds I've tested or seen used effectively:

• Overlay two ProgressBar widgets
  This is the most straightforward and reliable approach. In your widget layout XML, stack two ProgressBar elements on top of each other:

  1. The bottom ProgressBar acts as the secondary progress: set its max value, use its primary progress to represent your secondary progress value, and style it with a muted, low-contrast color.
  2. The top ProgressBar is your primary progress: set the same max value, style it with your main accent color, and set its background to transparent so the secondary bar shows through underneath.
     Then in your RemoteViews code, update both bars separately:

  remoteViews.setProgress(R.id.secondary_progress_bar, maxValue, secondaryProgressValue)
  remoteViews.setProgress(R.id.primary_progress_bar, maxValue, primaryProgressValue)
  

  Pro tip: Adjust the top bar's height or add small horizontal padding if you want a subtle visual gap between the two progress layers.

• Use a custom LayerDrawable with method invocation
  If you prefer a single ProgressBar, create a LayerDrawable in res/drawable that includes both secondary and primary progress layers. Since RemoteViews doesn't expose a direct method for secondary progress, you can use setInt() to trigger updates on a custom Drawable subclass that supports setting both progress values:

  // For a custom Drawable with exposed setSecondaryProgress() and setProgress() methods
  remoteViews.setInt(R.id.progress_bar, "setSecondaryProgress", secondaryProgressValue)
  remoteViews.setInt(R.id.progress_bar, "setProgress", primaryProgressValue)
  

  Note: Make sure your custom Drawable's methods are public and compatible with RemoteViews' method invocation rules to avoid security or compatibility issues.

• Opt for Android 12+ layout flexibility
  If your app targets Android 12 (API 31) or higher, you can take advantage of improved widget layout constraints to refine the overlay approach. The newer API supports tighter control over widget element positioning, making the dual-ProgressBar setup look cleaner and behave more consistently across devices.

Key Considerations #

• Keep your widget layout lightweight to avoid performance lag, especially if you're updating progress frequently.
• Test across different Android versions—RemoteViews behavior can vary slightly between API levels, so ensure your workaround works reliably on your target minimum version.

内容的提问来源于stack exchange，提问作者Chitrang