Question

我的Android项目中有一个围绕群发消息传递的活动。消息包含在ListView中，每行都有一个类似的按钮。当按下类似按钮时，具有总喜欢数量的标签增加1（如果未被点击则减去相似的标签）。但是，当您在键盘打开时想要一条消息，然后按下后退按钮时，键盘将关闭，最近喜欢/不喜欢的消息将恢复为之前的类似计数。有什么我可以添加到TextView以防止它这样做？或者我可以对onBackButtonPressed()做些什么？谢谢你的帮助。

这是我更改likeCount文本的代码：

    class MessageInfo {
    public String messageID;
    public String messageContent;
    public String messageLikes;
    public String senderID;
}

class ViewHolder {

    public TextView messageContent = null;
    public TextView messageLikeCount = null;
    public Button likeButton = null;
    public String messageLikes = null;
    public String messageID = null;


    public String messageSendTime;
    public String senderID;

    final CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
            getApplicationContext(),
            keys.getIdPool(), // Identity Pool ID
            Regions.US_EAST_1 // Region
    );

    public AmazonDynamoDBClient dynamoDb = Region.getRegion(Regions.US_EAST_1)
            .createClient(
                    AmazonDynamoDBClient.class,
                    credentialsProvider,
                    new ClientConfiguration()
            );

    ViewHolder(View row) {
        messageContent = (TextView)row.findViewById(R.id.messageText);
        messageLikeCount = (TextView)row.findViewById(R.id.likeCountText);
        likeButton = (Button)row.findViewById(R.id.likeBtn);

        likeButton.setTypeface(fontAwesome);
    }

    void populateFrom(final MessageInfo message) {

        Log.e("MESSAGE2", "The message is " + message.messageContent);

        messageContent.setText(message.messageContent);
        messageID = message.messageID;
        messageLikes = message.messageLikes;

        int likeCount = 0;

        if (messageLikes == null) {
            messageLikes = "";
        }

        Log.e("MessageLikes", "Mesage likes is " + messageLikes);

        if (messageLikes.contains(userInfo.getProfId())) {
            likeButton.setText(getString(R.string.icon_heart_closed));
            likeButton.setTextColor(getResources().getColor(R.color.colorHeart));
        }

        for (int i = 0; i < messageLikes.length(); i++) {

            if (messageLikes.charAt(i) == ',') {

                likeCount += 1;

            }

        } // end for loop to get number of likes


        messageLikeCount.setText(String.valueOf(likeCount));




        likeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.e("Clicked", "Like button clicked");

                likeButton.setText(getString(R.string.icon_heart_closed));
                likeButton.setTextColor(getResources().getColor(R.color.colorHeart));

                int newLikeCount = Integer.parseInt(messageLikeCount.getText().toString()) + 1;
                messageLikeCount.setText(String.valueOf(newLikeCount));

            }
        });

    }

}

class MessageAdapter extends ArrayAdapter<MessageInfo> {
    MessageAdapter() {
        super(SingleGroupActivity.this, android.R.layout.simple_list_item_1, messageArr);
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder messageViewHolder;

        Log.e("MESSAGE", "The message is " + messageArr.get(position).messageContent);

        if (convertView == null) {
            LayoutInflater inflater = getLayoutInflater();
            convertView = inflater.inflate(R.layout.message_row_layout, null);

            messageViewHolder = new ViewHolder(convertView);
            convertView.setTag(messageViewHolder);
        } else {

            messageViewHolder = (ViewHolder)convertView.getTag();
        }

        if (messageArr.size() > 0) {
            MessageInfo tempMessage = messageArr.get(position);
            messageViewHolder.populateFrom(tempMessage);
        }


        return (convertView);
    }

}

Answer 1

当用户使用以下代码点按“按钮”时，您可以隐藏键盘：

char *

当键盘打开时按下后退按钮时，android中的TextView将恢复为上一个值

1 个答案: