PrintPhotoUseCase

[fetiu]

[Description]
(#30 에서 분리됨)

• 인화지 특성에 맞춰 프레임 디자인 조정 및 프린터 출력 테스트
• 출력 결과물에 같이네컷 로고 경계가 다소 번지는 현상 해결
  • 프린터 설정에서 검정 잉크 유량 조정 가능한지 확인 (e.g. flow rate)
  • 안된다면, 프레임 색상을 밝거나 옅은 색으로 조정하는 것도 고려하기 (e.g. 바탕 흰색 + 민트색 로고 or 민트색 바탕 + 흰색로고)

[ing03201]

@OptIn(ExperimentalPermissionsApi::class)
@Preview
@Composable
fun BitmapFromComposableFullSnippet() {
    val context = LocalContext.current
    val coroutineScope = rememberCoroutineScope()
    val snackbarHostState = remember { SnackbarHostState() }
    val graphicsLayer = rememberGraphicsLayer()

    val writeStorageAccessState = rememberMultiplePermissionsState(
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            // No permissions are needed on Android 10+ to add files in the shared storage
            emptyList()
        } else {
            listOf(Manifest.permission.WRITE_EXTERNAL_STORAGE)
        }
    )

    // This logic should live in your ViewModel - trigger a side effect to invoke URI sharing.
    // checks permissions granted, and then saves the bitmap from a Picture that is already capturing content
    // and shares it with the default share sheet.
    fun shareBitmapFromComposable() {
        if (writeStorageAccessState.allPermissionsGranted) {
            coroutineScope.launch {
                val bitmap = graphicsLayer.toImageBitmap()
                val uri = bitmap.asAndroidBitmap().saveToDisk(context)
                shareBitmap(context, uri)
            }
        } else if (writeStorageAccessState.shouldShowRationale) {
            coroutineScope.launch {
                val result = snackbarHostState.showSnackbar(
                    message = "The storage permission is needed to save the image",
                    actionLabel = "Grant Access"
                )

                if (result == SnackbarResult.ActionPerformed) {
                    writeStorageAccessState.launchMultiplePermissionRequest()
                }
            }
        } else {
            writeStorageAccessState.launchMultiplePermissionRequest()
        }
    }

    Scaffold(
        snackbarHost = { SnackbarHost(snackbarHostState) },
        floatingActionButton = {
            FloatingActionButton(onClick = {
                shareBitmapFromComposable()
            }) {
                Icon(Icons.Default.Share, "share")
            }
        }
    ) { padding ->
        Column(
            modifier = Modifier
                .padding(padding)
                .fillMaxSize()
                .drawWithCache {
                    onDrawWithContent {
                        graphicsLayer.record {
                            this@onDrawWithContent.drawContent()
                        }
                        drawLayer(graphicsLayer)
                    }
                }

        ) {
            ScreenContentToCapture()
        }
    }
}

@Composable
private fun ScreenContentToCapture() {
    Column(
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center,
        modifier = Modifier
            .fillMaxSize()
            .background(
                Brush.linearGradient(
                    listOf(
                        Color(0xFFF5D5C0),
                        Color(0xFFF8E8E3)
                    )
                )
            )
    ) {
        Image(
            painterResource(id = R.drawable.sunset),
            contentDescription = null,
            modifier = Modifier
                .aspectRatio(1f)
                .padding(32.dp),
            contentScale = ContentScale.Crop
        )
        Text(
            "Into the Ocean depths",
            fontSize = 18.sp
        )
    }
}

private suspend fun Bitmap.saveToDisk(context: Context): Uri {
    val file = File(
        Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
        "screenshot-${System.currentTimeMillis()}.png"
    )

    file.writeBitmap(this, Bitmap.CompressFormat.PNG, 100)

    return scanFilePath(context, file.path) ?: throw Exception("File could not be saved")
}

/**
 * We call [MediaScannerConnection] to index the newly created image inside MediaStore to be visible
 * for other apps, as well as returning its [MediaStore] Uri
 */
private suspend fun scanFilePath(context: Context, filePath: String): Uri? {
    return suspendCancellableCoroutine { continuation ->
        MediaScannerConnection.scanFile(
            context,
            arrayOf(filePath),
            arrayOf("image/png")
        ) { _, scannedUri ->
            if (scannedUri == null) {
                continuation.cancel(Exception("File $filePath could not be scanned"))
            } else {
                continuation.resume(scannedUri)
            }
        }
    }
}

private fun File.writeBitmap(bitmap: Bitmap, format: Bitmap.CompressFormat, quality: Int) {
    outputStream().use { out ->
        bitmap.compress(format, quality, out)
        out.flush()
    }
}

private fun shareBitmap(context: Context, uri: Uri) {
    val intent = Intent(Intent.ACTION_SEND).apply {
        type = "image/png"
        putExtra(Intent.EXTRA_STREAM, uri)
        addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
    }
    startActivity(context, createChooser(intent, "Share your image"), null)
}

[ing03201]

androidx print 하는 함수

private void doPhotoPrint() {
    PrintHelper photoPrinter = new PrintHelper(this);//can use getActivity() here

    photoPrinter.setScaleMode(PrintHelper.SCALE_MODE_FIT);

    Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logontig);

    photoPrinter.printBitmap("myLogo.jpg", bitmap);
}

[DokySp]

해당 기능은 구현되었으나, UseCase가 없어 다시 오픈했습니다~
현재 ViewModel에서 UseCase없이 구현되어있음.

[fetiu]

@DokySp 가 PNG 오버레이하는 방식으로 구현 수정 예정