Check Visibility of View in ScrollView on Android

If you are working on an Android app that uses a ScrollView, you may want to check the visibility of a particular view within the ScrollView. This can be useful if you need to perform some action when the view becomes visible or invisible to the user.

To check the visibility of a view within a ScrollView on Android, you can use the `getLocalVisibleRect()` method. This method returns the visible bounds of the view relative to its own coordinate system.

Here's an example code snippet that demonstrates how to check the visibility of a view within a ScrollView:


View view = findViewById(R.id.my_view);
ScrollView scrollView = findViewById(R.id.my_scroll_view);

Rect scrollBounds = new Rect();
scrollView.getHitRect(scrollBounds);

if (view.getLocalVisibleRect(scrollBounds)) {
    // The view is visible within the scroll view
} else {
    // The view is not visible within the scroll view
}

In this code snippet, we first obtain references to the view and ScrollView objects using their respective IDs. We then create a `Rect` object to represent the bounds of the ScrollView. We do this by calling the `getHitRect()` method on the ScrollView and passing in the Rect object as a parameter. This method sets the values of the Rect object to the visible bounds of the ScrollView.

Next, we call the `getLocalVisibleRect()` method on the view and pass in the scrollBounds Rect object as a parameter. This method returns true if the view is at least partially visible within the ScrollView.

Finally, we can use an if statement to check the return value of the `getLocalVisibleRect()` method and perform some action based on whether the view is visible or not.

By using this method, you can easily check the visibility of a view within a ScrollView on Android and perform any necessary actions accordingly.

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