Question

I Have activity that get some data from the internet, and shows it to the screen.
I’m using scroll view cause it’s long text, I also want different text style for a different data,so I use few textViews with a different style and to show it on the Activity screen,
my problem is that scroll view can handle only one view, so how can I use scrolling to show different style of Text view, I tried to add LinearLayout to the scrollView and add all the textViews dynamically in code to this LinearLayout ,but I’m getting exception – scroll view can host only one direct child.

The code below:

/** this is the function, which called from the onClick method.
wanted data object contains 2 strings title message and the message itself.

When debug the code i can see that there's two String values in each loop.
but i cant add the linearLayout to my scrollView - exception ScrollView can host only one direct child */

    private void showResult(ArrayList<WantedData> result) {
        // TODO Auto-generated method stub
        TextView title;
        TextView data;
        scrollLayout = (LinearLayout) findViewById(R.id.LlScrollView);  
        for (WantedData curr : result) {
            if (curr.getTitle() == null) {
                break;
            }

            title = new TextView(this);
            title.setText(curr.getTitle());

            scrollLayout.addView(title, LayoutParams.FILL_PARENT,
                    LayoutParams.WRAP_CONTENT);
            data = new TextView(this);
            data.setText(curr.getData());   
            scrollLayout.addView(data, LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
        }
        scroll.addView(scrollLayout, LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);

        //at the onCreate method -  scroll = (ScrollView) findViewById(R.id.SvShowTextFromServer);
    }

the xml file:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <include
        android:id="@+id/layout_reffernce"
        layout="@layout/explore" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Enter City" />

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <EditText
                android:id="@+id/EtCity"
                android:layout_width="210dp"
                android:layout_height="wrap_content"
                android:layout_weight="0.14"
                android:orientation="vertical" >

                <requestFocus />
            </EditText>

            <Button
                android:id="@+id/bSearchCity"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Search" />
        </LinearLayout>

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Enter State" />

        <EditText
            android:id="@+id/EtState"
            android:layout_width="253dp"
            android:layout_height="wrap_content"
            android:orientation="vertical" />
    </LinearLayout>

    <ScrollView
        android:id="@+id/SvShowTextFromServer"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <LinearLayout
            android:id="@+id/LlScrollView"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/backround"
            android:orientation="vertical" >
        </LinearLayout>


    </ScrollView>

</LinearLayout>

Answer 1

If you have defined a LinearLayout in XML you don’t have to create a new LinearLayout in your code but you have to retrieve the existing one in this way

LinearLayout linearLayout = (LinearLayout) findViewById(R.id.LlScrollView);

Otherwise you have to remove the LinearLayout in your XML and add all by code.