在我的应用程序中,我在网格视图中从 sd 卡加载图像几乎 40 到 50 个图像为此我创建了适配器,其中构造函数将图像从 sd 卡加载到位图数组列表的全局变量,在获取视图中我从数组列表返回位图问题从这个活动用户将移动到其他活动,删除后他将删除图像用户将返回网格活动并必须再次加载适配器,这会创建“位图超出 vm 预算”。所以我不知道这种从 sd 卡加载图像的方法有没有更好的方法可以用于从 sd 卡加载图像而没有内存泄漏的任何库
public class PicAdapter extends BaseAdapter {
int defaultItemBackground;
private Context galleryContext;
Bitmap placeholder;
public PicAdapter(Context c) {
// instantiate context
galleryContext = c;
// create bitmap array
bitmaplist=new ArrayList<Bitmap>();
GlobalData.imageBitmaps = new WeakReference<ArrayList<Bitmap>>(bitmaplist);
imageDescription = new ArrayList<String>();
imagetitle = new ArrayList<String>();
picturesCursor.moveToFirst();
int i = 0;
for (i = 0; i < picturesCursor.getCount(); i++) {
String imagepath = picturesCursor.getString(picturesCursor
.getColumnIndex("img"));
File cacheimage=new File(imagepath);
if(!cacheimage.exists())
{
dBopenHelper.deleteHappyMoments(imagepath);
}
else
{
Bitmap bitmap =
ViewUtils.decodeSampledBitmapFromResource(imagepath,
AppConstants.FRAME_WIDTH,
AppConstants.FRAME_HEIGHT);
ViewUtils.recycleBitmapFrame();
GlobalData.imageBitmaps.get().add(bitmap);
imageDescription.add(picturesCursor.getString(picturesCursor
.getColumnIndex("image_description")));
imagetitle.add(picturesCursor.getString(picturesCursor
.getColumnIndex("image_title")));
picturesCursor.moveToNext();
}
}
if (i == picturesCursor.getCount()) {
Bitmap bitmap = (Bitmap) BitmapFactory.decodeResource(getResources(), R.drawable.add_new);
GlobalData.imageBitmaps.get().add(bitmap);
imageDescription.add(
"Click Add to new Pictures..............");
}
// get the styling attributes - use default Andorid system resources
}
// BaseAdapter methods
// return number of data items i.e. bitmap images
public int getCount() {
return bitmaplist.size();
}
// return item at specified position
public Object getItem(int position) {
return position;
}
// return item ID at specified position
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = (ImageView) getLayoutInflater().inflate(
R.layout.item_grid_image, null);
convertView.setLayoutParams(new GridView.LayoutParams(
AppConstants.FRAME_WIDTH, AppConstants.FRAME_HEIGHT));
}
galleryImageView = (ImageView) convertView;
galleryImageView.setImageBitmap(GlobalData.imageBitmaps.get().get(position));
public void addPic(Bitmap newPic) {
// set at currently selected index
GlobalData.imageBitmaps.get().add(currentPic, newPic);
}
// return bitmap at specified position for larger display
public Bitmap getPic(int posn) {
// return bitmap at posn index
return GlobalData.imageBitmaps.get().get(posn);
}
}
示例代码对我有很大帮助
提前致谢