android - Out of Memory Exception while scroll Listview?

Question

I refered through many resources but can't get right answer,

I have made an custom adapter to view images in a listview. This images are retrieved from memory card. Everything runs fine but while i scroll through the listview i get an OutOfMemory Exception. I have posting the code using which i retrive images from sdcard.

public void getFromSdcard() {

    File file = new File(
            android.os.Environment.getExternalStorageDirectory(),
            "Tiles/.NoMedia");

    if (file.isDirectory()) {
        listFile = file.listFiles();

        for (int i = 0; i < listFile.length; i++) {

            f.add(listFile[i].getAbsolutePath());

        }
    }
}

here f is arraylist of string and i am passing it to an custom adapter following is the code for my custom adapter.

public class NewImageAdapter extends ArrayAdapter<Image> {

private ArrayList<Image> objects;
String packageName;
Activity act;

public NewImageAdapter(Activity context, int image_layout,
        ArrayList<Image> objects) {
    super(context, image_layout, objects);
    this.act = context;
    this.objects = objects;

}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub

    View v = convertView;

    if (v == null) {
        LayoutInflater inflater = (LayoutInflater) getContext()
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = inflater.inflate(R.layout.list_item, null);
    }

    Image i = objects.get(position);

    if (i != null) {
        ImageView iv = (ImageView) v.findViewById(R.id.imagemenu123);
        // TextView tv = (TextView) v.findViewById(R.id.commandText);
        if (iv != null) {

            Bitmap myBitmap = BitmapFactory.decodeFile(i.getImagePath());

            iv.setImageBitmap(myBitmap);
            // iv.setImageBitmap(i.getImageBitmap());
            // tv.setText("Tiles Images");
        }

    }
    return v;
}

}

Any solution to my problem:

Answer 1

use this concept this will help you, After that set the imagebitmap on image view

public static Bitmap convertBitmap(String path)   {

        Bitmap bitmap=null;
        BitmapFactory.Options bfOptions=new BitmapFactory.Options();
        bfOptions.inDither=false;                     //Disable Dithering mode
        bfOptions.inPurgeable=true;                   //Tell to gc that whether it needs free memory, the Bitmap can be cleared
        bfOptions.inInputShareable=true;              //Which kind of reference will be used to recover the Bitmap data after being clear, when it will be used in the future
        bfOptions.inTempStorage=new byte[32 * 1024]; 


        File file=new File(path);
        FileInputStream fs=null;
        try {
            fs = new FileInputStream(file);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        try {
            if(fs!=null)
            {
                bitmap=BitmapFactory.decodeFileDescriptor(fs.getFD(), null, bfOptions);
            }
            } catch (IOException e) {

            e.printStackTrace();
        } finally{ 
            if(fs!=null) {
                try {
                    fs.close();
                } catch (IOException e) {

                    e.printStackTrace();
                }
            }
        }

        return bitmap;
    }

If you want to make a small image from large image with height and width like 60 and 60 and scroll the listview fast then use this concept

public static Bitmap decodeSampledBitmapFromPath(String path, int reqWidth,
            int reqHeight) {

        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(path, options);

        options.inSampleSize = calculateInSampleSize(options, reqWidth,
                reqHeight);

        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        Bitmap bmp = BitmapFactory.decodeFile(path, options);
        return bmp;
        }

    public static int calculateInSampleSize(BitmapFactory.Options options,
            int reqWidth, int reqHeight) {

        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {
            if (width > height) {
                inSampleSize = Math.round((float) height / (float) reqHeight);
            } else {
                inSampleSize = Math.round((float) width / (float) reqWidth);
             }
         }
         return inSampleSize;
        }

I hope it will help you much.

You cam take help from developer site Here