尝试使用Google“将缩小版本加载到内存中”方法，但不显示任何图像

Question

我正在制作一个基本的益智应用游戏，我正在尝试显示关卡，以便玩家可以选择其中一个。

图片大约是1000x1000像素，我将它们设置为缩小到屏幕宽度平方的1/3左右的图像视图。大约有40个级别，这意味着要显示40个图像。这是我第一次使用android studio，所以当我将6张图像加载到屏幕上时，我没想到应用程序开始滞后。

我的应用程序停止运行，因为内存不足，所以我在线寻找降低图像质量的方法。我找到了google的答案Where they load the image into a bitmap, then load it again with the dimensions changed.因为我是初学者，所以我无法完全理解这些方法的作用，所以我只是将其复制并粘贴到我的代码中。

我设置了所有内容，就像教程告诉我的那样，但是当我运行我的应用程序时，图像停止显示。

我的代码：

public class MainMenuPuzzle {
//all puzzle images are equally sized squares so this int stores the sidelengths
private int width = Constants.SCREEN_WIDTH/3;
private ImageView image;
//stores the id of the image using R.id.filename
int id;
//changes the margins of the imageview
public ViewGroup.LayoutParams params;
//variables for margins on each side
private int l;
private int t;
private int r = 0;
private int b = 0;



public MainMenuPuzzle(ImageView image, Activity activity,int row, int column,int id){

    this.image = image;
    this.id = id;

    ViewGroup.LayoutParams params = image.getLayoutParams();
    final RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) image.getLayoutParams();

    //there are 3 images displayed in every row, adjusts the margin depending on which column the image is in
    if (column == 1){
        l = 0;
    }
    else if(column == 2){
        l = width;
    }
    else{
        l = width*2;
    }
    //the vertical margin is based on which row of images the image is in
    t = ((row-1)*width)+Constants.SCREEN_HEIGHT;

    lp.width =width;
    lp.height= width;
    lp.setMargins(l,t,r,b);

    //where I attempt to reduce the quality of the image so my app doesn't lag lmao
    image.setImageBitmap(
            decodeSampledBitmapFromResource(Constants.CURRENT_CONTEXT.getResources(), id, width, width));

    image.setLayoutParams(params);

}
//from google
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;
}
//from google
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);
}

//random methods because I'm too lazy to make getters and setters for everything
public ImageView getImage(){
    return image;
}

public void setHeight(int height){
    params.height = height;
}

public void setWidth(int width){
    params.width = width;
}
}