4

我正在使用通用图像加载器在 ListView 中将图像显示为缩略图但是我遇到内存不足错误，当我滚动列表时，当列表不在滚动阶段但新视图具有第一个视图的图像但比图像设置为应有的正确图像。

public class NewAdapter extends BaseAdapter {

    private Activity activity;
    private ArrayList<String> movieThumbnail;
    private ArrayList<String> movieText;
    private static LayoutInflater inflater=null;
    static File cacheDir;

    ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(activity)
    .memoryCache(new WeakMemoryCache())
    .denyCacheImageMultipleSizesInMemory()
    .discCache(new UnlimitedDiscCache(cacheDir))
    .threadPoolSize(5)
    .imageDownloader(new URLConnectionImageDownloader(120 * 1000, 120 * 1000))
    .enableLogging()
    .build();

    DisplayImageOptions options = new DisplayImageOptions.Builder()
    .cacheOnDisc()
    .cacheInMemory()
    .bitmapConfig(Bitmap.Config.RGB_565)
    .imageScaleType(ImageScaleType.IN_SAMPLE_INT)
    .build();

    private ImageLoader imageLoader= ImageLoader.getInstance();

    public NewAdapter(Activity a, ArrayList<String> movieThumbnail, ArrayList<String> movieText) {
        activity = a;
        /*data=d;*/
        this.movieThumbnail = movieThumbnail;
        this.movieText = movieText;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
            cacheDir=new File(android.os.Environment.getExternalStorageDirectory(),"JunkFolder");
        else
            cacheDir=activity.getCacheDir();
        if(!cacheDir.exists())
            cacheDir.mkdirs();

        imageLoader.init(config);

    }

    public int getCount() {
        return movieText.size();
    }

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

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

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi=convertView;
        if(convertView==null)
              vi = inflater.inflate(R.layout.listrow, null);

        TextView text=(TextView)vi.findViewById(R.id.rowListTextView);
        ImageView image=(ImageView)vi.findViewById(R.id.movieImage);
        text.setText(movieText.get(position));
        imageLoader.displayImage(movieThumbnail.get(position), image, options);
        return vi;
    }
}

这是 ImageView 和 TextView 的 Xml 布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/text_relativelayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/latest_list_toggle" />


    <ImageView
        android:id="@+id/movieImage"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginLeft="12dp"
        android:layout_marginTop="14dp" />

    <TextView
        android:id="@+id/rowListTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/movieImage"
        android:paddingBottom="10dp"
        android:paddingLeft="10dp"
        android:paddingRight="21dp"
        android:paddingTop="20dp"
        android:text="@string/app_name"
        android:textColor="@android:color/black"
        android:textSize="17sp"
        android:textStyle="bold" />
</RelativeLayout>
4

3 回答 3

11

.resetViewBeforeLoading()在 DisplayImageOptions 中设置。

于 2012-12-17T20:16:33.750 回答
4

尝试下一个（全部或几个）：

减少配置中的线程池大小 (.threadPoolSize(...))。建议使用 1 - 5。采用

 .bitmapConfig(Bitmap.Config.RGB_565)

在显示选项中。RGB_565 中的位图消耗的内存是 ARGB_8888 中的 2 倍。采用

.memoryCache(new WeakMemoryCache())

在配置中或在显示选项中完全禁用内存中的缓存（不要调用 .cacheInMemory()）。采用

.imageScaleType(ImageScaleType.IN_SAMPLE_INT)

在显示选项中。或者试试

.imageScaleType(ImageScaleType.EXACTLY).

避免使用 RoundedBitmapDisplayer。它使用 ARGB_8888 配置创建新的位图对象，以便在工作期间显示。

于 2014-02-21T09:08:00.207 回答
1

确保在 ImageLoader 中根据需要设置图像大小

// decodes image and scales it to reduce memory consumption
    private Bitmap decodeFile(File f) {
        try {
            // decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            BitmapFactory.decodeStream(new FileInputStream(f), null, o);

            // Find the correct scale value. It should be the power of 2.
            final int REQUIRED_SIZE = 70;
            int width_tmp = o.outWidth, height_tmp = o.outHeight;
            int scale = 1;
            while (true) {
                if (width_tmp / 2 < REQUIRED_SIZE
                        || height_tmp / 2 < REQUIRED_SIZE)
                    break;
                width_tmp /= 2;
                height_tmp /= 2;
                scale *= 2;
            }

            // decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize = scale;
            return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
        } catch (FileNotFoundException e) {
        }
        return null;
    }
于 2012-12-13T08:03:52.623 回答