浓咖啡.执行“加载适配器数据"时出错 [英] Espresso. Error performing 'load adapter data'

问题描述

我有一个ListView，它显示数据库中的数据.

I have a ListView, which shows data from a database.

    db = new DB(this);
    db.open();


    String[] from = new String[]{DB.COLUMN_FIRSTNAME, DB.COLUMN_LASTNAME};
    int[] to = new int[]{android.R.id.text1, android.R.id.text2};        

    scAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_activated_2, null, from, to, 0);
    lvData = (ListView) findViewById(R.id.lvData);
    lvData.setAdapter(scAdapter);

    lvData.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
    lvData.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {

它以项目列表的形式显示数据库中的名字和姓氏: 点击到用户界面

It shows the first name and last name from the database as a list of items: Click to UI

因此，今天，我尝试在此应用程序中使用Espresso，但找不到找到包含文本的项目的方法.

So, today I tried to use Espresso with this app and I can't find a way to click on the item containing the text.

当我使用时:

onData(anything())
    .inAdapterView(withId(R.id.lvData))
    .atPosition(3)
    .perform(click());

它完美地工作.但是我想单击包含相应项目文本的项目.

It works perfectly. But I want to click on the item containing the corresponding item's text.

到目前为止，我一直在尝试(我在stackoverflow，google，github等网站上找到的所有内容):

What I tried so far (everything I've found at stackoverflow, google, github, etc.):

onView(allOf(withText("Ivan Ivanov"))).perform(click())

onData(allOf(is(instanceOf(MainActivity.class)),is("Ivan Ivanov")))
            .inAdapterView(withId(R.id.lvData))
            .perform(click());

onData(hasToString(startsWith("v")))
            .inAdapterView(withId(R.id.lvData))
            .atPosition(0).perform(click());

onData(instanceOf(MainActivity.class))
            .inAdapterView(withId(R.id.lvData))
            .atPosition(0)
            .check(matches(hasDescendant(withText("Ivan Ivanov"))));

onData(anything()).inAdapterView(withContentDescription("Ivan Ivanov"))
            .atPosition(0).perform(click());

因此，字符串"Ivan Ivanov"和包含数据库中数据的项目之间可能存在差异:firstName + lastName?

So, maybe is there are differences between the string "Ivan Ivanov" and the item, which contains data from the database: firstName+lastName?

推荐答案

使用光标匹配器以匹配列表视图中的项目.

Use CursorMatchers to match items in your listview.

onData()适用于适配器中的数据，而不适用于实际视图.在您的情况下，ListView由CursorAdapter(因此为CursorMatcher)支持.

onData() works against the data in your adapter, not the actual view. In your case the ListView is backed by the CursorAdapter, hence the CursorMatcher.

用法如下:

onData(withRowString(DB.COLUMN_FIRSTNAME, "Ivan")).perform(click());

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