如何使用LinearLayout和现有TextView以编程方式将TextView添加到ScrollView

Question

I have the following: -A map with Strings like:["Color: blue","Size: big"] called detailsArray

An existing ScrollView with a LinearLayout and existing TextViews:

<ScrollView>
    <LinearLayout>
        <TextView
            android:text="something: else"
        />
    </LinearLayout>
</ScrollView>

I've ommited common fields like width, height, xml schemas on purpose.

Now I want to add textViews programmatically. I don't know hoy many are they:

    TextView detail;
    LinearLayout llay = (LinearLayout)fragmentView.findViewById(R.id.container);    
    for (int i = 0; i < detailsArray.length; i++) {
                    detail = new TextView(fragmentView.getContext());
                    detail.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
                    detail.setText(detailsArray[i]);
                    llay.addView(detail);
                }
        ScrollView sv = (ScrollView) fragmentView.findViewById(R.id.scroll_view);
        sv.addView(llay);

But I'm getting an exception:

04-17 12:38:09.975: E/AndroidRuntime(3361): Caused by: java.lang.IllegalStateException: ScrollView can host only one direct child

What should I do? Thank you in advance.

Answer 1

You should remove sv.addView(llay); as you are basically adding the linear layout twice to the same ScrollView - that the exception you are getting and why when you removeAllViews in the beginning it solves the issue. After you finish the for loop call

sv.invalidate(); 
sv.requestLayout(); 

should make it refresh it's content.