android - java.lang.OutOfMemoryError 在 android.graphics.BitmapFactory.decodeResource (BitmapFactory.java :374)

Question

我在向 gridview 添加可变背景时遇到 OutOfMemoryError...在

final Bitmap shelfBackground = BitmapFactory.decodeResource(resources, background);

这是我的代码。

public class ShelvesView extends GridView {
    private Bitmap mShelfBackground;
    private int mShelfWidth;
    private int mShelfHeight;
    public ShelvesView(Context context) {
        super(context);
    }
    public ShelvesView(Context context, AttributeSet attrs) {
        super(context, attrs);
        load(context, attrs, 0);
    }
    public ShelvesView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        load(context, attrs, defStyle);
    }

    private void load(Context context, AttributeSet attrs, int defStyle) {
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ShelvesView,   defStyle, 0);
        int imageWidth = options.outWidth;
        final Resources resources = getResources();
        final int background = a.getResourceId(R.styleable.ShelvesView_shelfBackground, 0);
        final Bitmap shelfBackground = BitmapFactory.decodeResource(resources, background);
        if (shelfBackground != null) {
            mShelfWidth = shelfBackground.getWidth();
            mShelfHeight = shelfBackground.getHeight();
            mShelfBackground = shelfBackground;
        }

        a.recycle();
    }

    @Override
    protected void dispatchDraw(Canvas canvas) {
        final int count = getChildCount();
        final int top = count > 0 ? getChildAt(0).getTop() : 0;
        final int shelfWidth = mShelfWidth;
        final int shelfHeight = mShelfHeight;
        final int width = getWidth();
        final int height = getHeight();
        int bottom = (count > 0) ? getChildAt(count - 5).getBottom() + shelfHeight : 0;
        final Bitmap background = mShelfBackground;
        for (int x = 0; x < width; x += shelfWidth) {
            for (int y = top; y < height; y += shelfHeight) {
                canvas.drawBitmap(background, x, y, null);
            }
        }

        //drawDecorations(canvas, top, shelfHeight, width);

        // canvas.drawBitmap(mShelfLeftLayer,0,bottom, null);

        super.dispatchDraw(canvas);
    }

}

Answer 1

为其添加位图选项 -

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
shelfBackground = BitmapFactory.decodeResource(resources, background, options);