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我正在开发一个 Android 3.1 平板电脑应用程序,我有一个android.support.v4.app.Fragment带有两个画廊的 Fragment ( )。

我将此代码用作画廊(我对两个画廊使用相同的适配器):

public class ImageGalleryAdapter extends BaseAdapter
{
    private ArrayList<String> mImagesPath;
    private Context mContext;
    private ImageView.ScaleType mScaleType;
    private int mWidth;
    private int mHeight;

    public ArrayList<String> getmImagesPath()
    {
        return mImagesPath;
    }

    public void setmImagesPath(ArrayList<String> mImagesPath)
    {
        this.mImagesPath = mImagesPath;
    }

    public void addImage(String imagePath)
    {
        mImagesPath.add(imagePath);
    }

    public ImageGalleryAdapter(Context context, ImageView.ScaleType scaleType, int width, int height)
    {
        mContext = context;
        mWidth = width;
        mHeight = height;
        mScaleType = scaleType;

        mImagesPath = new ArrayList<String>();
    }

    @Override
    public int getCount()
    {
        return mImagesPath.size();
    }

    @Override
    public Object getItem(int position)
    {
        return position;
    }

    @Override
    public long getItemId(int position)
    {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {
        // Get a View to display image data                     
        ImageView imageView;
        if (convertView == null) { // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setLayoutParams(new GridView.LayoutParams(
                    LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        } else {
            imageView = (ImageView) convertView;
        }

        File imageFile = new  File(mImagesPath.get(position));
        if(imageFile.exists())
        {
            BitmapFactory.Options options = new Options();
            options.inSampleSize = 32;
            imageView = new ImageView(this.mContext);
            Bitmap myBitmap = BitmapFactory.decodeFile(imageFile.getAbsolutePath(), options);
            imageView.setImageBitmap(myBitmap);

            imageView.setScaleType(mScaleType);

            // Set the Width & Height of the individual images
            imageView.setLayoutParams(new Gallery.LayoutParams(mWidth, mHeight));
        }

        return imageView;
    }
}

有时,在线路上Bitmap myBitmap = BitmapFactory.decodeFile(imageFile.getAbsolutePath());,我收到 Out Of Memory 错误

一个画廊有一张图片,另一个画廊有三张图片。

当我转到片段时,会发生内存不足,点击后退按钮,然后我再次回到片段。

我想我需要打电话myBitmap.recycle(),但在哪里...

4

1 回答 1

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当您的 convertview 不为空时,请在 else 情况下尝试:

} else {
    imageView = (ImageView) convertView;
    Bitmap bm = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
    if (bm != null) {
        bm.recycle();
    }
}

我们在谈论多少张图片和多大尺寸?您是否尝试在 onStop() 中将适配器设置为空?这也可以删除所有引用并释放内存。

于 2012-10-16T11:00:44.783 回答