Closed or circular Vertical ListView Android

Question

I have an Vertical listview i want listview should be closed. For example if the last item is reached in Listview then show the first item below the last item. It means item should be in circular format. And if i scroll from first item it should show last item before first item. I want scrolling for both side.

Answer 1

public class MainActivity extends Activity {
ListView list;
long startTime;
long endTime;


List<String> mList = new ArrayList<String>();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    list = (ListView) findViewById(R.id.list);
    downloadDetails();

     String str;
     for (int i = 0; i < 10; i++) {
     str = new String("Data --- " + i);
     mList.add(str);
     }
     CircularAdapter adapter = new CircularAdapter(this, 0, mList);
        list.setAdapter(adapter);
    final YourRunnable runy = new YourRunnable();

    list.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {

                startTime = (new Date()).getTime();
                runy.onPause();// pausing thread actually pauses scrolling
            }
            if (event.getAction() == MotionEvent.ACTION_UP) {
                endTime = (new Date()).getTime();
                if ((endTime - startTime) <= 100) {// 100 mill second limit
                                                    // for click

                    // Log.i("ITEM CLICK() ", "item : ");
                }

                runy.onResume(); // resume scrolling
            }

            return false;
        }

    });

    new Thread(runy).start();

}





class YourRunnable implements Runnable {
    private Object mPauseLock;
    private boolean mPaused;
    private boolean mFinished;

    public YourRunnable() {
        mPauseLock = new Object();
        mPaused = false;
        mFinished = false;
    }

    @SuppressLint("NewApi")
    public void run() {
        while (!mFinished) {
            // for loop is not infinite but enough as Integer.MAX_VALUE
            for (int index = 0; index < list.getAdapter().getCount(); index++) {
                list.smoothScrollToPositionFromTop(list.getLastVisiblePosition() + 1, 0, 10000);
                try {
                    // it helps scrolling to stay smooth as possible (by
                    // experiment)
                    Thread.sleep(3000);
                    synchronized (mPauseLock) {
                        while (mPaused) {
                            try {
                                mPauseLock.wait();// putting thread in wait
                                                    // list of mPauseLock
                                                    // object
                            } catch (InterruptedException e) {
                            }
                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

            }

        }
    }

    // to pause list
    public void onPause() {
        synchronized (mPauseLock) {
            mPaused = true;
        }
    }

    // resume thread
    public void onResume() {
        synchronized (mPauseLock) {
            mPaused = false;
            mPauseLock.notifyAll();// notify all object that are waiting on
                                    // the wait list of mPauseLock object
        }
    }

}

private class CircularAdapter extends ArrayAdapter {

    List<String> mlist;
    Context mContext;
    LayoutInflater inflater;
    public final int HALF_MAX_VALUE = Integer.MAX_VALUE / 2;
    public final int MIDDLE;

    @SuppressWarnings("unchecked")
    public CircularAdapter(Context ctx, int resId, List<String> objects) {
        super(ctx, resId, objects);
        mContext = ctx;
        mlist = objects;
        inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        MIDDLE = HALF_MAX_VALUE - HALF_MAX_VALUE % mlist.size();

    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return Integer.MAX_VALUE;
    }

    @Override
    public String getItem(int position) {
        // TODO Auto-generated method stub
        int relativePos = position % mlist.size();
        Log.i("RELATIVE : ", " POS:" + relativePos);
        return mlist.get(relativePos);
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder = null;

        if (convertView == null) {
            holder = new ViewHolder();
            convertView = inflater.inflate(R.layout.item, parent, false);
            holder.name = (TextView) convertView.findViewById(R.id.name);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        String model = getItem(position);
        holder.name.setText(model);

        convertView.setOnClickListener(new ListenerT(model) {

            @Override
            public void onClick(View v) {
                Log.i("CLICK", "ITEM---" + name);

            }
        });

        return convertView;

    }

}

// use your own listener to pass parameter
private class ListenerT implements OnClickListener {

    String name;

    public ListenerT(String nm) {
        name = nm;
    }

    @Override
    public void onClick(View v) {

    }

}

private class ViewHolder {
    TextView name;
}

}