Question

我在main.xml中有多个textview

<LinearLayout...
>
<textview adndroid:tag="A">
...
till to Z.
</LinearLayout>

我需要对所有textViews进行快速滚动。怎么做？需要一些帮助。

按A或B时我必须打印字符，依此类推。怎么做？

a1.setOnTouchListener(newOnTouchListener(){
public boolean onTouch(View w,MotionEvent event)
{
//? WHAT TO WRITE HERE?
 I NEED TO PRINT ON THE SCREEN A because  I CLICK ON A TEXTVIEW.
 I LIKE TO PRINT THE CHARACTER A IN A BOX (like the one from contact list android)

}

});

以下是一个示例代码：link

Answer 1

你可以这样做：

<ScrollView android:id="@+id/ScrollView02" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content"
        xmlns:android="http://schemas.android.com/apk/res/android">

<LinearLayout
    ....
>
 <textview  ...yourtextview   >
 ...
</LinearLayout>

</ScrollView>

对于问题的第二部分，我认为您必须在所有textView中添加android:clickable="true"并使用代码处理它。

否则，您可以使用带有setOnItemClickListener(new OnItemClickListener()的ListView，这样就更容易......

Answer 2

首先在xml：

中指定字符的布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginTop="?attr/actionBarSize"
    >

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/list_products"
        android:fastScrollEnabled="true"
        />

    <LinearLayout
        android:orientation="vertical"
        android:id="@+id/chars_layout"
        android:layout_width="26dp"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_alignParentEnd="true"
        >

    </LinearLayout>


</RelativeLayout>

然后在代码中为您的布局添加字符：

     private void addCharsForScrolling(LinearLayout charsLayout, ArrayList<String> sectionList) {
            Collections.sort(sectionList);
            sections = new String[sectionList.size()];

            for (int m = 0; m < sectionList.size(); m++) {
                sections[m] = sectionList.get(m);
                        addScrollText(charsLayout, sectionList.get(m),false);

            }
        }

以下是sectionlist的代码：

    private void findChars (ArrayList<BrandsRestaurantsModel> brands,  ArrayList <ProductLists.ResourantsWithPlace> imgstructure){
        LinearLayout charsLayout = (LinearLayout) this.rootview.findViewById(R.id.chars_layout);

            mapIndex = new LinkedHashMap<String, Integer>();
            sectionList = new ArrayList<String>();
            for (int x = 0; x < brands.size(); x++) {
                sectionList.add(brands.get(x).getCh());
                if (!mapIndex.containsKey(brands.get(x).getCh()))
                    mapIndex.put(brands.get(x).getCh(), x);
            }
            Set<String> sectionLetters = mapIndex.keySet();
            ArrayList<String> sectionList = new ArrayList<String>(sectionLetters);
            addCharsForScrolling(charsLayout, sectionList);

    }

如何在字母文本视图上创建快速滚动并打印第一个字符？

2 个答案: