如何在Kotlin中转换位图FTO文件？我使用碎片

发布于 2025-02-13 11:25:23 字数 455 浏览 1 评论 0原文

这是我的代码：

private val cameraResult =
        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
            if (result.resultCode == Activity.RESULT_OK && result.data != null) {
                val bitmap = result.data?.extras?.get("data") as Bitmap
                binding.ivProfile.loadImage(bitmap)
            }
        }

结果类型是位图，但是服务器所需的所需类型是文件。那么如何将位图转换为文件？谢谢您的回答。

原文

This is my code :

private val cameraResult =
        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
            if (result.resultCode == Activity.RESULT_OK && result.data != null) {
                val bitmap = result.data?.extras?.get("data") as Bitmap
                binding.ivProfile.loadImage(bitmap)
            }
        }

the result type is bitmap, but the required type that server needed is File. So how can i convert bitmap to File? Thankyou for answering.

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樱花落人离去 2025-02-20 11:25:23

尝试一下

//create a file to write bitmap data
File f = new File(context.getCacheDir(), filename);
f.createNewFile();

//Convert bitmap to byte array
Bitmap bitmap = your bitmap;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos);
byte[] bitmapdata = bos.toByteArray();

//write the bytes in file
FileOutputStream fos = new FileOutputStream(f);
fos.write(bitmapdata);
fos.flush();
fos.close();

Try this

//create a file to write bitmap data
File f = new File(context.getCacheDir(), filename);
f.createNewFile();

//Convert bitmap to byte array
Bitmap bitmap = your bitmap;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos);
byte[] bitmapdata = bos.toByteArray();

//write the bytes in file
FileOutputStream fos = new FileOutputStream(f);
fos.write(bitmapdata);
fos.flush();
fos.close();

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