Android: TextView inside ScrollView: How to limit height

Question

I have put a TextView inside a ScrollView in Android:

<ScrollView
        android:layout_width = "fill_parent"
        android:layout_height = "wrap_content">

    <TextView
            android:layout_width = "wrap_content"
            android:layout_height = "wrap_content" />
</ScrollView>

With this configuration, the scrollview grows to wrap the textview-content. How can I achieve that the scrollview takes only as much space as needed (for few text), but at the same time limit the size to 100dp (for long texts) ?

• If I set layout_height to 100dp, a lot of space is wasted when the text is short
• If I set layout_height to wrap_content, the scrollview runs the risk to fill the whole screen, but I don't want the whole sreen to only contain this scrollview. It should be 100dp heigh as a maximum.

---

The solution which was found:

Thank you for alls answers. For all people that have the same issue, here goes the accepted solution: Create a custom ScrollView class an use this class inside your xml file instead ScrollView. Then override onMeasure() method:

public class ScrollMyVew extends ScrollView {
    public static final int maxHeight = 100; // 100dp
    // default constructors 

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        heightMeasureSpec = MeasureSpec.makeMeasureSpec(dpToPx(getResources(),maxHeight), MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
    private int dpToPx(Resources res, int dp) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,     res.getDisplayMetrics());
    }
}

This solution is taken from https://stackoverflow.com/a/23617530/3080611

Answer 1

Try something like this:

<ScrollView
    android:id="@+id/myScrollView"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:fillViewport="true"/>
    <TextView
        android:id="@+id/myTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:maxHeight="your_value_here"/>
</ScrollView>