java - 如何在 Java Canvas 中绘制 JSON 文本？

Question

如何在 Android Canvas 中编写具有漂亮格式的 JSON 对象/字符串？

例如，

val jsonText = "{"profile":{"name": "Robert","account_id": "31"}}"

将被绘制到看起来像的Canvas，

Answer 1

Canvas functions have some limitations as it draws all text in single line. If the width of the text exceeds the width of the Canvas, the text will be clipped. hence we use staticLayout for the same to show text in paragraph or multi-line approach.

下面的代码用于在 Canvas 中显示 json 格式的文本，其中 json 从 Assets 文件加载。

fun drawTextOnCanvas(activity: FragmentActivity) {
var canvas = Canvas(bitmap)
var textPaint=TextPaint()
textPaint.density=20f
textPaint.bgColor=Color.BLACK

val jsonText = activity.loadJSONFromAsset("demo.json")
val jsonObject = JSONObject(jsonText);
val text=jsonObject.toString(1)
val staticLayout=StaticLayout.Builder.obtain(text,0,text.length,textPaint,150)

staticLayout.build().draw(canvas)}

希望这对您有所帮助!