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Merge pull request #65 from team-JMT/feat/bitmap_resizing
비트맵 이미지를 리사이징하여 파일로 저장하는 기능 구현 및 적용
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94 changes: 94 additions & 0 deletions
94
presentation/src/main/java/org/gdsc/presentation/utils/BitmapUtils.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| package org.gdsc.presentation.utils | ||
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| import android.content.ContentResolver | ||
| import android.content.Context | ||
| import android.graphics.Bitmap | ||
| import android.graphics.BitmapFactory | ||
| import android.graphics.Matrix | ||
| import android.net.Uri | ||
| import android.os.Environment | ||
| import androidx.exifinterface.media.ExifInterface | ||
| import java.io.File | ||
| import java.io.FileOutputStream | ||
| import java.io.IOException | ||
| import java.io.InputStream | ||
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| object BitmapUtils { | ||
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| fun Bitmap.saveBitmapToFile(context: Context, fileName: String): File { | ||
| val directory = context.getExternalFilesDir(Environment.DIRECTORY_PICTURES) | ||
| directory?.mkdirs() | ||
| val file = File(directory, fileName) | ||
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| var outputStream: FileOutputStream? = null | ||
| try { | ||
| outputStream = FileOutputStream(file) | ||
| this.compress(Bitmap.CompressFormat.JPEG, 90, outputStream) | ||
| outputStream.flush() | ||
| this.recycle() | ||
| return file | ||
| } catch (e: IOException) { | ||
| e.printStackTrace() | ||
| } finally { | ||
| outputStream?.close() | ||
| } | ||
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| return file | ||
| } | ||
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| private fun Bitmap.rotateBitmap(angle: Float): Bitmap { | ||
| val matrix = Matrix() | ||
| matrix.postRotate(angle) | ||
| return Bitmap.createBitmap( | ||
| this, 0, 0, this.width, this.height, matrix, true | ||
| ) | ||
| } | ||
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| private fun getOrientationOfImage(inputStream: InputStream): Int { | ||
| val exif = try { | ||
| ExifInterface(inputStream) | ||
| } catch (e: IOException) { | ||
| e.printStackTrace() | ||
| return -1 | ||
| } | ||
| val orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1) | ||
| if (orientation != -1) { | ||
| when (orientation) { | ||
| ExifInterface.ORIENTATION_ROTATE_90 -> return 90 | ||
| ExifInterface.ORIENTATION_ROTATE_180 -> return 180 | ||
| ExifInterface.ORIENTATION_ROTATE_270 -> return 270 | ||
| } | ||
| } | ||
| return 0 | ||
| } | ||
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| fun Uri.getCompressedBitmapFromUri(context: Context): Bitmap? { | ||
| val resolver: ContentResolver = context.contentResolver | ||
| var inputStream: InputStream? = null | ||
| try { | ||
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| val options = BitmapFactory.Options().apply { | ||
| inSampleSize = 2 | ||
| } | ||
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| inputStream = resolver.openInputStream(this) | ||
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| val bitmap = requireNotNull(BitmapFactory.decodeStream(inputStream, null, options)) | ||
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| val orientation = getOrientationOfImage(inputStream!!).toFloat() | ||
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| return bitmap.rotateBitmap(orientation) | ||
| } catch (e: Exception) { | ||
| e.printStackTrace() | ||
| } finally { | ||
| inputStream?.close() | ||
| } | ||
| return null | ||
| } | ||
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| } | ||
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