BitmapFactory.decodeFile : java.lang.OutOfMemoryError

1. 에러 메세지

java.lang.OutOfMemoryError

at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)

at android.graphics.BitmapFactory.decodeStreamInternal(BitmapFactory.java:613)

at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:589)

at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:369)

at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:395)

2. 해결 방법

Uri path = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
// intent 의 여분 데이터로 저장된 비트맵 이미지를 얻는다.
//Bitmap bmp = (Bitmap) data.getExtras().get("data");
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = false;
options.inPurgeable = true;       // 메모리를 줄여주는 옵션
options.inPreferredConfig = Bitmap.Config.RGB_565;
options.inSampleSize = calculateInSampleSize(options, resizeHeight, resizeHeight);
options.inJustDecodeBounds = false;
options.inDither = true;    // 이미지를 깔끔하게 처리해서 보여주는 옵션

Bitmap bmp = BitmapFactory.decodeFile(fileFullPath, options);

/**
 * 이미지의 샘플사이즈를 계산한다.
 * @author 임성진
 * @version 2.0.0
 * @since 2017-03-31 오전 9:16
 * @params
 * @return
 */
public int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {

    // Raw height and width of image
    int height = options.outHeight;
    int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {

        final int halfHeight = height / 2;
        final int halfWidth = width / 2;

        // Calculate the largest inSampleSize value that is a power of 2 and keeps both
        // height and width larger than the requested height and width.
        while ((halfHeight / inSampleSize) >= reqHeight
                && (halfWidth / inSampleSize) >= reqWidth) {
            inSampleSize *= 2;
        }
    }

    return inSampleSize;
}