我有数百张存储在 sdcard 中的图像。我将这些本地路径放在 sqlite 现在我需要使用本地路径显示这些图像我将文件解码为位图并使用这些 bimap 显示列表视图这很好但是当滚动该列表视图时我遇到了这样的 OutOfMemory 问题： ：java.lang.OutOfMemoryError：位图大小超过android.graphics.BitmapFactory.nativeDecodeAsset（Native Method）的VM预算我该如何解决这个问题请提供任何建议。提前致谢
public class AllGalleryItemsAdapter extends BaseAdapter {
int[] adata = null;
int screenheight,screenwidth;
Context mContext;
private LayoutInflater inflator ;
private int[] children;
int flag;
ArrayList<String> imagepositionPath = new ArrayList<String>();
ArrayList<ArrayList<String>> imagePath = new ArrayList<ArrayList<String>>();
ArrayList<ArrayList<Bitmap>> bitmaplist= new ArrayList<ArrayList<Bitmap>>();
ArrayList<String> tagsText = new ArrayList<String>();
ArrayList<Integer> tagig_selected = new ArrayList<Integer>();
private ArrayList<Row> rows;
//public AllGalleryItemsAdapter(Context context, int[] children) {}
private ViewHolder holder;
private ViewHolder2 holder2;
private Bitmap myBitmapc1,myBitmapc2_1,myBitmapc2_2,myBitmapc3_1,myBitmapc3_2,myBitmapc3_3;
private ViewHolder3 holder3;
File imgFiles1;
Bitmap b = null;
public AllGalleryItemsAdapter(Context context,
ArrayList<String> tag_name,ArrayList<Integer> tag_id, ArrayList<ArrayList<String>> imageList) {
// TODO Auto-generated constructor stub
super();
imagepositionPath = new ArrayList<String>();
imagePath = new ArrayList<ArrayList<String>>();
tagsText = new ArrayList<String>();
bitmaplist= new ArrayList<ArrayList<Bitmap>>();
tagig_selected = new ArrayList<Integer>();
imagePath=imageList;
tagsText=tag_name;
tagig_selected = tag_id;
mContext=context;
@Override
public int getCount() {
// TODO Auto-generated method stub
return tagsText.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public int getItemViewType(int position) {
return imagePath.get(position).size();
}
@Override
public int getViewTypeCount() {
return 4;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View view = null;
switch (getItemViewType(position)) {
default:
if(convertView==null)
{
inflator = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
vg = (ViewGroup) inflator.inflate(R.layout.listone, null);
holder = new ViewHolder();
holder.listoneimage = (ImageView )vg.findViewById(R.id.singleimage);
holder.tagtext = (TextView)vg.findViewById(R.id.tagtext);
vg.setTag(holder);
view=vg;
}else{
holder = (ViewHolder) convertView.getTag();
view=convertView;
}
holder.tagtext.setText("#"+tagsText.get(position));
File f = new File(imagePath.get(position).get(0))
b= null;
b = decodeFile(f);
holder.listoneimage.setImageBimap(b);
holder.listoneimage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int tagid = tagig_selected.get(position);
//System.out.println("this is tagidddddddddddddd in adapterrrrrrr "+tagid);
Intent in = new Intent(mContext.getApplicationContext(),AllGalleryItemsDetailsViewActivity.class);
in.putExtra("tagId", tagid);
startActivity(in);
}
});
break;
case 2:
if(convertView==null)
{
inflator = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
vg = (ViewGroup) inflator.inflate(R.layout.listsecond, null);
holder2 = new ViewHolder2();
holder2.listsecondleftimage = (ImageView)vg.findViewById(R.id.singlesecondimage);
holder2.listsecondthirdimage = (ImageView)vg.findViewById(R.id.singlesecondthirdimage);
holder2.tagtext = (TextView)vg.findViewById(R.id.tagtextintwo);
vg.setTag(holder2);
view=vg;
} else {
holder2 = (ViewHolder2) convertView.getTag();
holder2.listsecondleftimage.setImageBitmap(null);
holder2.listsecondthirdimage.setImageBitmap(null);
view=convertView;
}
holder2.tagtext .setText("#"+tagsText.get(position));
File f1 = new File(imagePath.get(position).get(0))
b= null;
b = decodeFile(f1);
holder2.listsecondleftimage.setImageBitmap(b);
File f2 = new File(imagePath.get(position).get(1))
b= null;
b = decodeFile(f2);
holder2.listsecondthirdimage.setImageBitmap(b);
holder2.listsecondleftimage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int tagid = tagig_selected.get(position);
Intent in = new Intent(mContext.getApplicationContext(),AllGalleryItemsDetailsViewActivity.class);
in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
in.putExtra("tagId", tagid);
startActivity(in);
}
});
holder2.listsecondthirdimage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int tagid = tagig_selected.get(position);
Intent in = new Intent(mContext.getApplicationContext(),AllGalleryItemsDetailsViewActivity.class);
in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
in.putExtra("tagId", tagid);
startActivity(in);
}
});
break;
case 3:
if(convertView==null)
{
inflator = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
vg = (ViewGroup) inflator.inflate(R.layout.list_secondview,null);
holder3 = new ViewHolder3();
holder3.iconsecond = (ImageView)vg.findViewById(R.id.largeinlistseconddynamic);
holder3.favsecond = (ImageView)vg.findViewById(R.id.smalimagefirstdynamic);
holder3.sharesecond = (ImageView)vg.findViewById(R.id.smallimageseconddynamic);
holder3.tagtext = (TextView)vg.findViewById(R.id.tagtextinthree);
vg.setTag(holder3);
view=vg;
}else{
holder3 = (ViewHolder3) convertView.getTag();
view=convertView;
}
holder3.tagtext .setText("#"+tagsText.get(position));
//
File f12 = new File(imagePath.get(position).get(0))
b= null;
b = decodeFile(f12);
holder3.iconsecond.setImageBitmap(b);
File f22 = new File(imagePath.get(position).get(1))
b= null;
b = decodeFile(f22);
holder3.favsecond.setImageBitmap(b);
File f23 = new File(imagePath.get(position).get(2))
b= null;
b = decodeFile(f23);
holder3.sharesecond.setImageBitmap(b);
holder3.iconsecond.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int tagid = tagig_selected.get(position);
Intent in = new Intent(mContext.getApplicationContext(),AllGalleryItemsDetailsViewActivity.class);
in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
in.putExtra("tagId", tagid);
startActivity(in);
}
});
holder3.favsecond.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int tagid = tagig_selected.get(position);
Intent in = new Intent(mContext.getApplicationContext(),AllGalleryItemsDetailsViewActivity.class);
in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
in.putExtra("tagId", tagid);
startActivity(in);
}
});
holder3.sharesecond.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int tagid = tagig_selected.get(position);
Intent in = new Intent(mContext.getApplicationContext(),AllGalleryItemsDetailsViewActivity.class);
in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
in.putExtra("tagId", tagid);
startActivity(in);
}
});
break;
}
return view;
}
}
class ViewHolder {
TextView tagtext,desc,liketext,sharetext,text1,text2,text3,secondtitle,seconddesc,secondshare,secondlike;
// ImageView icon,fav,like,share,secondicon,iconsecond,favsecond,sharesecond,listsecondleftimage,listsecondthirdimage;
ImageView listoneimage;
}
class ViewHolder2 {
TextView title,desc,liketext,sharetext,text1,text2,text3,secondtitle,seconddesc,secondshare,secondlike,tagtext;
// ImageButton icon,fav,like,share,secondicon,iconsecond,favsecond,sharesecond,listoneimage;
ImageView listsecondthirdimage;
ImageView listsecondleftimage;
}
class ViewHolder3 {
TextView title,desc,liketext,sharetext,text1,text2,text3,secondtitle,seconddesc,secondshare,secondlike,tagtext;
//ImageButton icon,fav,like,share,secondicon,listoneimage,listsecondleftimage,listsecondthirdimage;
ImageView sharesecond;
ImageView favsecond;
ImageView iconsecond;
}
这是我的解码文件方法
public Bitmap decodeFile(String filePath) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, o);
// The new size we want to scale to
final int REQUIRED_SIZE = LoginActiviy.screenWidth;;
// Find the correct scale value. It should be the power of 2.
int scale = 1;
while (o.outWidth / scale / 2 >= REQUIRED_SIZE && o.outHeight / scale / 2 >= REQUIRED_SIZE)
scale *= 2;
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeFile(filePath, o2);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}