如何使用Intent.ACTION_CREATE_DOCUMENT写入文件

Question

简单来说，我想将视图组转换为jpg图像文件。由于不推荐使用Environment.getExternalStorageDirectory，因此我正在使用此意图“ Intent.ACTION_CREATE_DOCUMENT”

private void createFile(String mimeType, String fileName) {
        Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType(mimeType);
        intent.putExtra(Intent.EXTRA_TITLE, fileName);
        startActivityForResult(intent, WRITE_REQUEST_CODE);
    }

在onActivityResult（）;中我得到结果返回的Uri。我的问题是，我会使用getExternalStorage（）

Bitmap bitmap = Bitmap.createBitmap(
                    containerLayout.getWidth(),
                    containerLayout.getHeight(), Bitmap.Config.ARGB_8888);
            Canvas canvas = new Canvas(bitmap);
            containerLayout.draw(canvas);
            FileOutputStream fileOutupStream = null;


            try {
                fileOutupStream = new FileOutputStream(fileName);
                bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutupStream);
                fileOutupStream.flush();
                fileOutupStream.close();
                Toast.makeText(this, "saved " + fileName, Toast.LENGTH_LONG).show();
            } catch (Exception e) {
                Toast.makeText(this, "something went wrong" + e.getMessage(), Toast.LENGTH_SHORT).show();
                e.printStackTrace();
            }

现在我得到结果返回的Uri，但是，我不知道如何将所需的位图写入此Uri

@Override
        protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
            if (resultCode == RESULT_OK && requestCode == WRITE_REQUEST_CODE) {
                Uri resultUri = data.getData();
//need help

}
}

Answer 1

您需要使用getContentResolver().openOutputStream

        @Override
        protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
            if (resultCode == RESULT_OK && requestCode == WRITE_REQUEST_CODE) {
                FileOutputStream fileOutupStream = getContentResolver().openOutputStream(data.getData());
            try {
                fileOutupStream = new FileOutputStream(fileName);
                bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutupStream);
                fileOutupStream.flush();
                fileOutupStream.close();
                Toast.makeText(this, "saved " + fileName, Toast.LENGTH_LONG).show();
            } catch (Exception e) {
                Toast.makeText(this, "something went wrong" + e.getMessage(), Toast.LENGTH_SHORT).show();
                e.printStackTrace();
            }

}
}