圖片記憶體溢出 總結

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其中option.inJustDecodeBounds = true;表示僅讀取圖片檔案資訊而不為圖片分配記憶體。

 

if(bitmap != null && !bitmap.isRecycled()){          bitmap.recycle();          bitmap = null;  }  System.gc();  

 

 

 

    private Response<Bitmap> doParse(NetworkResponse response) {        byte[] data = response.data;        BitmapFactory.Options decodeOptions = new BitmapFactory.Options();        Bitmap bitmap = null;        if (mMaxWidth == 0 && mMaxHeight == 0) {            decodeOptions.inPreferredConfig = mDecodeConfig;            bitmap = BitmapFactory.decodeByteArray(data, 0, data.length, decodeOptions);        } else {            // If we have to resize this image, first get the natural bounds.            decodeOptions.inJustDecodeBounds = true;            BitmapFactory.decodeByteArray(data, 0, data.length, decodeOptions);            int actualWidth = decodeOptions.outWidth;            int actualHeight = decodeOptions.outHeight;            // Then compute the dimensions we would ideally like to decode to.            int desiredWidth = getResizedDimension(mMaxWidth, mMaxHeight,                    actualWidth, actualHeight);            int desiredHeight = getResizedDimension(mMaxHeight, mMaxWidth,                    actualHeight, actualWidth);            // Decode to the nearest power of two scaling factor.            decodeOptions.inJustDecodeBounds = false;            // TODO(ficus): Do we need this or is it okay since API 8 doesn‘t support it?            // decodeOptions.inPreferQualityOverSpeed = PREFER_QUALITY_OVER_SPEED;            decodeOptions.inSampleSize =                findBestSampleSize(actualWidth, actualHeight, desiredWidth, desiredHeight);            Bitmap tempBitmap =                BitmapFactory.decodeByteArray(data, 0, data.length, decodeOptions);            // If necessary, scale down to the maximal acceptable size.            if (tempBitmap != null && (tempBitmap.getWidth() > desiredWidth ||                    tempBitmap.getHeight() > desiredHeight)) {                //修改圖片大小， 對圖片做裁剪的時候，會在記憶體中 有兩張圖片                 bitmap = Bitmap.createScaledBitmap(tempBitmap,                        desiredWidth, desiredHeight, true);                tempBitmap.recycle();            } else {                bitmap = tempBitmap;            }        }        if (bitmap == null) {            return Response.error(new ParseError(response));        } else {            return Response.success(bitmap, HttpHeaderParser.parseCacheHeaders(response));        }    }

 

圖片記憶體溢出 總結