"IllegalStateException : scrollview can host only one direct child" in one LinearLayout adding

Question

I have list of attached files and want to make my LinearLayout with it be horizontally Scrollable. I add only one child LinearLayout to my HorizontalScrollView, besides I get IllegalStateException. My xml: ``` ``` and want to add list of files to the LinearLayout in the ScrollView like this: ``` public void addFiles() { HorizontalScrollView scroll = (HorizontalScrollView) findViewById(R.id.scrollMessageFiles); LinearLayout layout = (LinearLayout) findViewById(R.id.panelMessageFiles); if(!FileManagerActivity.getFinalAttachFiles().isEmpty()) { fo…

Accepted Answer

You just need to remove this line: `scroll.addView(layout);` You already have this declared in xml and are trying to add it again, that's why you are getting the multiple children exception.

Try to run this:

```
public void addFiles() {
    HorizontalScrollView scroll = (HorizontalScrollView) findViewById(R.id.scrollMessageFiles);
    LinearLayout layout = (LinearLayout) findViewById(R.id.panelMessageFiles);
    if(!FileManagerActivity.getFinalAttachFiles().isEmpty()) {
        for (File file: FileManagerActivity.getFinalAttachFiles()) {

View line = new View(this);

line.setLayoutParams(new LayoutParams(1, LayoutParams.MATCH_PARENT));
            line.setBackgroundColor(0xAA345556);
            informationView = new TextView(this);
            informationView.setTextColor(Color.BLACK);
            informationView.setTextSize(12);
            informationView.setCompoundDrawablesWithIntrinsicBounds(
                    0, R.drawable.file_icon, 0, 0);
            informationView.setText(file.getName().toString());
            layout.addView(informationView, 0);
            layout.addView(line, 1);

}
        // This line is telling the system to add your LinearLayout to the ScrollView when it is already there, declared in your xml layout file
        //scroll.addView(layout);
    }

}
```

"IllegalStateException : scrollview can host only one direct child" in one LinearLayout adding

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