[Android]BitmapFactory.decodeResource在設定圖檔發生大小不一致的問題

最近在開發android media player的專輯封面圖檔

發現會有圖檔設定大小不符合預期的情形 如下面所述程式碼

mBitmap = getMirrorBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.cluster_media_music_icon_albums_disable) , percent);

埋log發現不符合大小是該行程式碼所引起,因此特別去搜尋 找到網路上有些關文章討論跟我發生一樣狀況的文章

BitmapFactory.decodeResource之坑 ：https://www.itread01.com/content/1546283285.html


Bitmap resize api

public Bitmap getResizedBitmap(Bitmap bm, int newWidth, int newHeight) {
    int width = bm.getWidth();    int height = bm.getHeight();    float scaleWidth = ((float) newWidth) / width;    float scaleHeight = ((float) newHeight) / height;    // CREATE A MATRIX FOR THE MANIPULATION    Matrix matrix = new Matrix();    // RESIZE THE BIT MAP    matrix.postScale(scaleWidth, scaleHeight);    // "RECREATE" THE NEW BITMAP    Bitmap resizedBitmap = Bitmap.createBitmap(
            bm, 0, 0, width, height, matrix, false);    //bm.recycle();    return resizedBitmap;}