在活动中嵌入一个大小的ListView - 机器人 [英] Embedding a sized ListView in activity - android

问题描述

我在看这个教程： http://developer.android .COM /资源/教程/视图/ HELLO-listview.html

是否有可能嵌入到我目前的活动列表，以便我可以设置其高度。我的布局是这样的：

Is it possible to embed the list in my current activity so I can set its height. My layout looks like this:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/mobile_vforum_bg"
    >
    <ImageView 
        android:src="@drawable/mobile_vforum" 
        android:layout_height="wrap_content" 
        android:layout_width="wrap_content" 
        android:id="@+id/logo"
        android:layout_marginLeft="57px"
        android:layout_marginTop="10px">
    </ImageView>
    <TextView 
        android:layout_height="30px"
        android:layout_width="fill_parent"
        android:id="@+id/welcomeText"
        android:textSize="16px"
        android:textColor="#317c73"
        android:background="#eeeeee"
        android:shadowColor="#333333"
        android:shadowDx="1"
        android:shadowDy="1"
        android:paddingTop="4px"
        android:paddingLeft="7px">
    </TextView>
    <ListView 
        android:layout_height="wrap_content"  
        android:layout_width="match_parent"
        android:id="@+id/projectList">
    </ListView>
</LinearLayout>

您可以在布局结尾看到我的ListView。基本上我有一个图像和文字的线，我想在列表驻留低于。本教程链接我张贴扩展ListActivity这是我感到困惑，因为我在扩展活动我目前的布局的java文件。任何帮助或建议是AP preciated。谢谢你。

You can see my ListView at the end of the layout. Basically I have an image and line of text and I want the list to reside below that. The tutorial link I posted extends ListActivity which is where I get confused since I am in my current layouts java file that extends Activity. Any help or suggestions is appreciated. Thanks.

推荐答案

是的，这是可以做到这一点。我已经做了几次，我的方法是通过扩展android.widget.BaseAdapter创建列表中的自定义适配器。这可能是比你更需要解决你的问题，但希望这给了你所需要的。

Yes, it is possible to do this. I've done it a few times, and my approach was to create a custom Adapter for the list by extending android.widget.BaseAdapter. This may be more than you need to solve your problem, but hopefully this gives you what you need.

下面是主要的活动布局：

Here is the main Activity layout:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="6dip"
    android:background="@drawable/backrepeat"
>
<Button
    android:id="@+id/cat_done_button"
    android:layout_width="75dip"
    android:layout_height="50dip"
    android:layout_marginTop="10dip"
    android:layout_marginLeft="6dip"
    android:text="@string/done"
/>
<EditText
    android:id="@+id/category_entry"
    android:layout_width="200dip"
    android:layout_height="wrap_content"
    android:hint="@string/category_hint"
    android:layout_margin="10dip"
    android:layout_below="@+id/cat_done_button"
/>
<ImageButton
    android:id="@+id/category_add_button"
    android:background="#00000000"
    android:src="@drawable/ic_menu_add_ld"
    android:layout_width="50dip"
    android:layout_height="50dip"
    android:layout_marginLeft="5dip"
    android:scrollbars="vertical"
    android:fadingEdge="vertical"
    android:layout_alignBottom="@+id/category_entry"
    android:layout_toRightOf="@+id/category_entry"
/>
<ListView  
    android:id="@+id/category_list"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_marginLeft="5dip"
    android:layout_marginBottom="5dip"
    android:background="#00000000"
    android:layout_below="@+id/category_notification"
/>
</RelativeLayout>

下面为列表中的每个行的单独的布局：

Here is the separate layout for each row in the list:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="6dip"
    android:background="#00000000"
>
<TextView  
    android:id="@+id/category_name"
    android:layout_width="200dip" 
    android:layout_height="wrap_content" 
    android:textSize="20sp"
    android:layout_marginTop="10dip"
    android:scrollbars="vertical"
    android:fadingEdge="vertical"
    android:layout_alignParentLeft="true"
    android:background="#00000000"
/>
<ImageButton
    android:id="@+id/category_delete_button"
    android:background="#00000000"
    android:src="@drawable/ic_menu_delete_ld"
    android:layout_width="50dip"
    android:layout_height="50dip"
    android:scrollbars="vertical"
    android:fadingEdge="vertical"
    android:layout_alignParentRight="true"
    android:focusable="false"
    android:focusableInTouchMode="false"
/>
</RelativeLayout>

下面是如何的主要活动（CategoryActivity）设置其列出对象：

Here is how the main activity (CategoryActivity) sets up its List object:

private void setUpCategoryList() {
        categoryList = (ListView) this.findViewById(R.id.category_list);

        categoryAdapter = new CategoryAdapter(this, android.R.layout.simple_list_item_1,
                categoryManager.getCategoriesList());
        categoryList.setAdapter(categoryAdapter);
    }

下面是自定义CategoryAdapter：

Here is the custom CategoryAdapter:

public class CategoryAdapter extends BaseAdapter implements OnClickListener {

    private CategoryActivity catActivity;
    private List<String> categoryList;
    private final String CAT_DELETED = "Category has been deleted.";
    private final String DEFAULT_DELETE = "Cannot delete Default category.";
    private final String NON_EMPTY_DELETE = "Category has entries.  Entries re-assigned to Default category.";

    public CategoryAdapter(CategoryActivity catActivity, int resource, List<String> items) {
        this.catActivity = catActivity;
        categoryList = items;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        String category = categoryList.get(position);

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) catActivity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.category_row_layout, null);
        }

        TextView categoryView = (TextView) convertView.findViewById(R.id.category_name);
        categoryView.setText(category);

        ImageButton deleteButton = (ImageButton) convertView.findViewById(R.id.category_delete_button);
        deleteButton.setOnClickListener(this);
        deleteButton.setTag(category);

        return convertView;
    }

    @Override
    public void onClick(View view) {
//Do stuff here
}

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