android，如何用一些字段粗体格式化json字符串

Question

在androidTextView中，当显示json字符串时，希望被正确格式化并且它应该有一些指定的字段粗体，例如：

{ “地点”： { "国家":"GB", “天气”：[ { "zip":20202, “描述”：“太阳”， “温度”：“80” } ] } },

显示为

试过@Zain 的解决方案，似乎不起作用（见下面的截图）。它在对话框的 TextView 中设置。没有缩进。

更新：它是对话框中的TextView：

private fun showFormatedJsonString(context: Context, jsonStr: String) {
        val dialog = Dialog(context)
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE)
        dialog.setContentView(R.layout.module_path)
        dialog.setCanceledOnTouchOutside(true)
        dialog.setCancelable(true)
        dialog.findViewById<TextView>(R.id.json_str).apply {
            
            text = jsonStr
        }
        dialog.findViewById<View>(R.id.root_container).setOnClickListener {
            dialog.dismiss()
        }
        
        val displayMetrics: DisplayMetrics = context.getResources().getDisplayMetrics()
        val dialogWidth = (displayMetrics.widthPixels * 0.85).toInt()
        val dialogHeight = (displayMetrics.heightPixels * 0.85).toInt()
        dialog.getWindow().setLayout(dialogWidth, dialogHeight)
        dialog.show()
    }

用SpannableStringBuilder试过，也不起作用

//spStrBuilder.color ( Color.CYAN) { append("to be colored") }
                spStrBuilder.bold { append("to be bold") }

Answer 1

如果匹配项多次出现，您可以通过编程方式执行此操作并使用SpannableString 用粗体标记文本

String json = "{ \"location\": { \"country\":\"GB\", \"weather\":[ { \"zip\":20202, \"description\":\"sun\", \"temp\":\"80\" } ] } }";
// List of words to be marked with bold
List<String> boldList = Arrays.asList("country", "zip");
final Spannable spannable = new SpannableString(json);

// Finding match of words in the String
for (String word : boldList) {
    int startIndex = json.indexOf(word);
    do {
        int endIndex = startIndex + word.length();
        spannable.setSpan(new StyleSpan(BOLD), startIndex, endIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        startIndex = json.indexOf(word, endIndex);
    } while (startIndex != -1);
}

TextView textView = findViewById(R.id.foo);
textView.setText(spannable);

更新

使用对话框中的代码：

class MainActivity : AppCompatActivity() {


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.sometest8)

        val json =
            "{ \"location\": { \"country\":\"GB\", \"weather\":[ { \"zip\":20202, \"description\":\"sun\", \"temp\":\"80\" } ] } }"
        button.setOnClickListener {
            showFormatedJsonString(this, json)
        }
    }


    fun formatBold(json: String): Spannable {
        val boldList: List<String> = listOf("country", "zip")
        val spannable: Spannable = SpannableString(json)

        // Finding match of words in the String
        for (word in boldList) {
            var startIndex = json.indexOf(word)
            do {
                val endIndex = startIndex + word.length
                spannable.setSpan(
                    StyleSpan(Typeface.BOLD),
                    startIndex,
                    endIndex,
                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
                )
                startIndex = json.indexOf(word, endIndex)
            } while (startIndex != -1)
        }
        return spannable
    }


    private fun showFormatedJsonString(context: Context, jsonStr: String) {
        val dialog = Dialog(context)
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE)
        dialog.setContentView(R.layout.module_path)
        dialog.setCanceledOnTouchOutside(true)
        dialog.setCancelable(true)
        dialog.findViewById<TextView>(R.id.json_str).apply {
            text = formatBold(jsonStr)
        }
        dialog.findViewById<View>(R.id.root_container).setOnClickListener {
            dialog.dismiss()
        }

        val displayMetrics: DisplayMetrics = context.getResources().getDisplayMetrics()
        val dialogWidth = (displayMetrics.widthPixels * 0.85).toInt()
        val dialogHeight = (displayMetrics.heightPixels * 0.85).toInt()
        dialog.getWindow()?.setLayout(dialogWidth, dialogHeight)
        dialog.show()
    }

}

预览

Answer 2

您可以使用HtmlCompat.fromHtml( htmlTextHere, HtmlCompat.FROM_HTML_MODE_LEGACY ) 使用html标签（在您的情况下为<b>标签）对您的文本进行样式化，但是这样您必须准备您的文本，例如： "{\"location\": { <b>\"country\"</b>:"+ object.location.country ...