StackOverflow2013

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copied!<p>I suspect this is a custom <code>View</code> similar to this one, remember to adjust width and height manually from xml:</p> <pre><code>import java.util.ArrayList; import java.util.List; import java.util.Random; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.os.Handler; import android.util.AttributeSet; import android.view.View; public class RotatingView extends View { public static class RotatingData { String data; public RotatingData(String data) { super(); this.data = data; } } public interface OnItemRotatedListener { public void onItemRotated(RotatingData data); } private List<RotatingData> mList; private Paint mPaint; private Handler mHandler; private int mCurrentSelection; private OnItemRotatedListener mItemRotatedListener; private Random mRandom; public RotatingView(Context context) { this(context, null); } public RotatingView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public RotatingView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mPaint = new Paint(); mHandler = new Handler(); mRandom = new Random(); List<RotatingData> list = new ArrayList<RotatingView.RotatingData>(); list.add(new RotatingData("0th item selected")); list.add(new RotatingData("1st item selected")); list.add(new RotatingData("2nd item selected")); setRotatingData(list); setSelection(0); } private void setSelection(int i) { mCurrentSelection = i; invokeListener(mList.get(i)); invalidate(); } public void setRotatingData(List<RotatingData> list) { mList = list; invalidate(); } public OnItemRotatedListener getItemRotatedListener() { return mItemRotatedListener; } public void setItemRotatedListener(OnItemRotatedListener itemRotatedListener) { mItemRotatedListener = itemRotatedListener; invokeListener(mList.get(mCurrentSelection)); } private void invokeListener(RotatingData data) { if (mItemRotatedListener != null) { mItemRotatedListener.onItemRotated(data); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); final List<RotatingData> list = mList; final int count = list.size(); final float w = getMeasuredWidth() / (float) count; final int h = getMeasuredHeight(); int left = 0; final Paint paint = mPaint; for (int i = 0; i < list.size(); i++) { if (i == mCurrentSelection) { paint.setColor(Color.DKGRAY); } else { paint.setColor(Color.LTGRAY); } canvas.drawRect(left, 0, left + w, h, paint); left += w; } } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); startRotating(); } private void startRotating() { mHandler.postDelayed(new Runnable() { @Override public void run() { mCurrentSelection++; mCurrentSelection %= mList.size(); setSelection(mCurrentSelection); mHandler.postDelayed(this, mRandom.nextInt(1000) + 1000); } }, mRandom.nextInt(1000) + 1000); } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); stopRotating(); } private void stopRotating() { mHandler.removeCallbacksAndMessages(null); } } </code></pre>

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