小编Mar*_*arc的帖子

我想知道 - 有没有办法在Activity之外访问android资源和/或资产文件(或来自任何其他文件夹的文件)(不传递上下文)？

没有上下文无法访问:

getResources().getIdentifier("resource_name", "drawable", getPackageName());
getAssets().open("file_in_assets_folder_name");

如果不在Activity中则抛出异常:

try {
    Class class = R.drawable.class;
    Field field = class.getField("resource_name");
    Integer i = new Integer(field.getInt(null));
} catch (Exception e) {}

也试过下面,但它抱怨文件不存在(这里做错了什么？):

URL url = new URL("file:///android_asset/file_name.ext");
InputSource source = new InputSource(url.openStream());
//exception looks like so 04-10 00:40:43.382: W/System.err(5547): java.io.FileNotFoundException: /android_asset/InfoItems.xml (No such file or directory)

我正在根据http://bartinger.at/listview-with-sectionsseparators/中描述的技术构建一个带有节的ListView .但是我想通过将convertView重用于非节项目来扩展它.但是,每次输入getView()方法时,我发现convertView变量为null.有人可以解释为什么会这样吗？

ViewHolder holder;
final ListViewItem item = items.get(position);

if (item.isSection()) {
    Section section = (Section)item;

    convertView = inflater.inflate(R.layout.section, null);
    TextView title = (TextView) convertView.findViewById(R.id.section_title);
    title.setText(section.title);
} else {
    if (convertView == null) {
        Log.d("Adapter", "convertView was null");
    }

    Server server = (Server)item;

    convertView = inflater.inflate(R.layout.server_row, null);
    holder = new ViewHolder();
    holder.serverName = (TextView) convertView.findViewById(R.id.server_name);
    holder.serverStatusIcon = (ImageView)convertView.findViewById(R.id.server_status_icon);
    convertView.setTag(holder);

    holder.serverName.setText(server.name);
}

return convertView;

正在创建和显示列表而没有错误,并且包含部分和非部分项目就好了.

我遇到的问题是只显示第一个TextView(eventItemTitle)的文本.正如您所看到的,我现在已经更改为插入文字字符串,但仍然只能看到标题.

我究竟做错了什么？

布局:

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">

        <TextView xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/eventItemTitle"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:textSize="16sp"
            android:textStyle="bold"
            android:textColor="#FFCC00">
        </TextView>

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

活动类:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.event_item);
    [...]
    TextView text = (TextView) findViewById(R.id.eventItemTitle);
    text.setText(event.getTitle() + "\n");

    TextView descTV = (TextView) findViewById(R.id.eventItemDescription);
    descTV.setText("i'm here");