Question

我遇到了我的函数是追加而不是添加的问题。

例如，我希望我的结果从200上升到201，但实际上是200到2001。有什么想法吗？

btnQuickUpdate.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) { //ref 1
            mAthlete_etCompScore = (EditText) findViewById(R.id.tvAttent);
            quickUpdate = String.valueOf(mAthlete_etCompScore.getText().toString());
            quickUpdate = quickUpdate + 1;

Book book = new Book();               
book.setAuthor(quickUpdate);

Answer 1

使quickUpdate Integer变量不是String，它将起作用

Answer 2

这是因为fos_rest: allowed_methods_listener: true serializer: serialize_null: true body_listener: array_normalizer: fos_rest.normalizer.camel_keys body_converter: enabled: true disable_csrf_role: ROLE_API format_listener: rules: - { path: '^/sso/menu', priorities: ['html'], fallback_format: 'html', prefer_extension: false } - { path: '^/public/request-password', priorities: ['html'], fallback_format: 'html', prefer_extension: true } - { path: '^/', priorities: ['json'], fallback_format: 'json', prefer_extension: false } routing_loader: default_format: json include_format: false view: view_response_listener: true formats: json: true xml: false rss: false html: true mime_types: json: ['application/json', 'application/x-json'] jsonp_handler: false exception: enabled: true是quickUpdate。

改为使用String。

Answer 3

您必须将quickUpdate声明为int并更改为：

quickUpdate = Integer.parseInt(mAthlete_etCompScore.getText().toString());
quickUpdate = quickUpdate + 1;

Answer 4

在进行任何数学操作之前，您需要转换为字符串。

btnQuickUpdate.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) { //ref 1


        mAthlete_etCompScore = (EditText) findViewById(R.id.tvAttent);
        //get your text into a string variable
        String str_quickUpdate = 
        String.valueOf(mAthlete_etCompScore.getText().toString());

        //Convert the string to integer value
        int quickUpdate = Integer.parseInt(str_quickUpdate.trim());
        //Your increment here
        quickUpdate = quickUpdate + 1;


        Book book = new Book();

        book.setAuthor(quickUpdate);

功能是追加而不是增加，出现问题

4 个答案: