定制阵列适配器

发布于 2024-12-15 09:37:25 字数 1282 浏览 0 评论 0原文

我正在编写一个新闻应用程序，但在显示自定义列表时遇到一些问题。我想要的只是列表项中有 2 个 TextView：

News-Title 和
News-Description

它们包含在 2 个静态数组中：homeScreen.title[] 和 homeScreen.descriptionLong[]。

下面是我的 HashMap 和 Adapter 代码：

final static ArrayList>数据 = 新的 ArrayList>();

static{
    HashMap<String, String> row = new HashMap<String, String>();
    for (int i = 0; i<HomeScreen.arrayLength; i++){
        row.put("Title", HomeScreen.title[i]);
        row.put("Description", HomeScreen.descriptionLong[i]);
        data.add(row);
    }
}

    SimpleAdapter adapter = new SimpleAdapter(this,
            data,
              R.layout.mainmenu,
              new String[] {"Title", "Description"},
              new int[] { R.id.textView1, R.id.textView2});
   setListAdapter(adapter);
}

    public void onItemClick(SimpleAdapter arg0, View arg1, int position,
                long id) {
            selectedNews = position;
            Toast.makeText(getApplicationContext(), "This is: " + selectedNews, Toast.LENGTH_LONG).show();
            Intent intent = new Intent(MainMenu.this, ReadNews.class);
            startActivity(intent);
        }

我遇到的问题是它只显示我的第 20 条（最后一条）新闻信息，而且默认的 OnItemClick 不再工作。我很感激你的帮助...

原文

I'm writing a news-app and I'm having some trouble with displaying a custom list. All I want is that list items have 2 TextViews in them:

News-Title and
News-Description

These are contained in 2 static arrays: homeScreen.title[] and homeScreen.descriptionLong[].

Lower you have my code for the HashMap and the Adapter:

final static ArrayList> data = new ArrayList>();

static{
    HashMap<String, String> row = new HashMap<String, String>();
    for (int i = 0; i<HomeScreen.arrayLength; i++){
        row.put("Title", HomeScreen.title[i]);
        row.put("Description", HomeScreen.descriptionLong[i]);
        data.add(row);
    }
}

    SimpleAdapter adapter = new SimpleAdapter(this,
            data,
              R.layout.mainmenu,
              new String[] {"Title", "Description"},
              new int[] { R.id.textView1, R.id.textView2});
   setListAdapter(adapter);
}

    public void onItemClick(SimpleAdapter arg0, View arg1, int position,
                long id) {
            selectedNews = position;
            Toast.makeText(getApplicationContext(), "This is: " + selectedNews, Toast.LENGTH_LONG).show();
            Intent intent = new Intent(MainMenu.this, ReadNews.class);
            startActivity(intent);
        }

The problem I'm having is that it only displays my 20'th (last) news information and also the default OnItemClick isn't working anymore. I'd appreciate your help...

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最好是你 2024-12-22 09:37:25

您应该将 row 实例化放在 for 循环中：

for (int i = 0; i<HomeScreen.arrayLength; i++){
    HashMap<String, String> row = new HashMap<String, String>();
    row.put("Title", HomeScreen.title[i]);
    row.put("Description", HomeScreen.descriptionLong[i]);
    data.add(row);
}

更新：

您的 OnItemClickListener 注册应如下所示：

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, 
                              int position, long id) {
        // your code here
    }
});

You should put the row instantiation inside the for loop:

for (int i = 0; i<HomeScreen.arrayLength; i++){
    HashMap<String, String> row = new HashMap<String, String>();
    row.put("Title", HomeScreen.title[i]);
    row.put("Description", HomeScreen.descriptionLong[i]);
    data.add(row);
}

Update:

Your OnItemClickListener registration should look something like this:

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, 
                              int position, long id) {
        // your code here
    }
});

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