Question

我有一个for循环，我正在为循环中的HashMap添加值。基本上我有一个帖子，它有评论。一篇帖子有8条评论，我需要HashMap的内容如下图所示：

for (int i2 = 0; i2 < conversationArray.length(); i2++) {
    JSONObject conversationArray1 = conversationArray.getJSONObject(i2);
    contentConversation = conversationArray1.getString("content");
    commenterId = conversationArray1.getString("commenterId");
    commenterName = conversationArray1.getString("commenterName");
    commenterPhotos = conversationArray1.getString("commenterPhotos");
    postIdForComments = conversationArray1.getString("postId");
    lastDateUpdatedConversation = conversationArray1.getString("lastDateUpdated");
    dateCreatedConversation = conversationArray1.getString("dateCreated");
    commentDescription.add(contentConversation);
    commentUserName.add(commenterName);
    commentProfileImageLink.add(commenterPhotos);

    commentProfileImageHashMap.put(postIdForComments, commenterPhotos);
    commentDescriptionHashMap.put(postIdForComments, contentConversation);
    commentUserNameHashMap.put(postIdForComments, commenterName);
}

但是，现在我的hashmap只包含第一个值。只有在第一次迭代中，值才会被添加到HashMap中，如何在所有8次迭代中为hashmap添加值。

PS：所有八个值的PostID应相同。

我当前的代码：

 //Android Manifest -- i have set all activities as DEFAULT except LAUNCHER activity.
<intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.DEFAULT" />
 </intent-filter>



@Override// In Main Activity I have put this code to exit app when back is pressed
public void onBackPressed() {

                    Intent intent = new Intent(Intent.ACTION_MAIN);
                    intent.addCategory(Intent.CATEGORY_HOME);
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(intent);
                    finish();
    }

请让我知道我应该在代码中做出哪些更改，以实现我的目标。欢迎提出所有建议。

Answer 1

使用Map<String, List<String>> 存储每篇帖子的评论列表：

Map<String, List<String>> mapOfPosts = new HashMap<>();

List<String> post1Comments = new ArrayList<>();

// Collect comments of a certain post
post1Comments.add("comment1");
post1Comments.add("comment2");
...

// Attach comments to post
mapOfPosts.put("post1", post1Comments);

// Repeat this for all posts

如何在android的for循环的每次迭代中向HashMap添加值

1 个答案: