安卓載入圖片過大而導致OOM記憶體溢位的解決方法(巨坑....)
阿新 • • 發佈:2019-02-01
如果圖片太大會造成OOM記憶體溢位的錯誤,需要用Bitmap的壓縮機制。
如果跳轉的頁面含有圖片可能會導致跳轉失敗。
比如說我這裡是一旦觸發了某個按鍵,就修改該xml的圖片和文字說明
則setImageResource應該改成這樣
imageview.setImageBitmap(decodeSampledBitmapFromResource(getResources(),name[i], 100, 100));
同時後面加上以下說明:
public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId, int reqWidth, int reqHeight) { // First decode with inJustDecodeBounds=true to check dimensions final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeResource(res, resId, options); // Calculate inSampleSize options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); // Decode bitmap with inSampleSize set options.inJustDecodeBounds = false; return BitmapFactory.decodeResource(res, resId, options); } public static int calculateInSampleSize( BitmapFactory.Options options, int reqWidth, int reqHeight) { // Raw height and width of image final int height = options.outHeight; final 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; }
經除錯,跳轉頁面不會崩潰,圖片正常載入.