自定义键盘Java文件修改按键图标报错求助：int类型值问题

Hey there! Let's break down why your icon update code is throwing that int-type error and how to fix it.

The Root Cause #

When you use R.drawable.myicon (note the lowercase d here—more on that in a sec!), you're referencing an integer resource ID that points to your drawable file. But it looks like your keyboard's icon field expects a Drawable object, not just the raw int ID. That's why the system is yelling about a type mismatch.

Quick Fixes to Try #

1. First: Check Your Spelling!

A super common mistake here is capitalizing the D in Drawable—Java's resource class uses lowercase for subclasses, so it should be R.drawable.myicon, not R.Drawable.myicon. If you had the capital D, that alone would cause a compile error because R.Drawable doesn't exist.

2. Convert the Resource ID to a Drawable Object

If the spelling was correct but you still get the error, you need to turn that int resource ID into a usable Drawable instance. Use ContextCompat.getDrawable() for cross-API compatibility (works on all Android versions):

// Get the Drawable instance using your context (e.g., from an Activity or Fragment)
Drawable customIcon = ContextCompat.getDrawable(this, R.drawable.myicon);
// Assign it to the key's icon field
keyboard.getKeys().get(9).icon = customIcon;

If you're working in a class that doesn't have direct access to a Context (like a helper class), make sure to pass a valid context into that class first.

3. Double-Check the Keyboard Key Class

If neither of the above works, take a quick look at the definition of your keyboard key class. If the icon field is actually supposed to take an int resource ID (some custom keyboard implementations do this), then fixing the R.drawable spelling should resolve the issue entirely.

内容的提问来源于stack exchange，提问作者user9226293