Question

我有从互联网获取一些数据的活动，并将其显示在屏幕上。我正在使用滚动视图因为它是长文本，我也想要不同的文本样式用于不同的数据，所以我使用几个不同样式的textViews并在Activity屏幕上显示它，我的问题是滚动视图只能处理一个视图，所以如何使用滚动来显示不同的Text视图样式，我尝试将LinearLayout添加到scrollView并在代码中动态地将所有textViews添加到此LinearLayout，但我是获得异常 - 滚动视图只能容纳一个直接子项。

以下代码：

/** 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);
    }

xml文件：

<?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

问题是在ScrollView中重复创建容器。您不应该在活动中创建它，而是从xml中定义：

LinearLayout scrollContainer = (LinearLayout)findViewById(R.id.LlScrollView);
for (...) {
    //create here some text
    scrollLayout.addView(text);
}

Answer 2

如果您在XML中定义了LinearLayout，则无需在代码中创建新的LinearLayout，但必须以这种方式检索现有的LinearLayout linearLayout = (LinearLayout) findViewById(R.id.LlScrollView);

LinearLayout

否则，您必须删除XML中的{{1}}并按代码添加所有内容。

将不同的TextView添加到ScrollView

2 个答案: