封闭或圆形垂直ListView Android

Question

我有一个垂直列表视图，我想关闭列表视图。例如，如果在 Listview 中到达最后一项，则在最后一项下方显示第一项。这意味着项目应该是循环格式。如果我从第一项滚动它应该在第一项之前显示最后一项。我想滚动两边。

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;
}

}