गैलरी का विस्तार और drawChild ओवरराइड करने के लिए संभव है।
ड्राइल्ड को प्रत्येक बच्चे के लिए बुलाया जाएगा जिसे खींचा जाना चाहिए।
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
final int left = child.getLeft();
int adjustedXOrigin = left - (getWidth()/2) + (child.getWidth()/2);
int newtop = (int) (ellipseYOffset - Math.sqrt(ellipseMinor2 * (1 - ((Math.pow(adjustedXOrigin, 2))/ellipseMajor2))));
newtop -= (child.getHeight()/2);
if(newtop >= 0)
{
child.layout(left, newtop, left + child.getWidth(), newtop + child.getHeight());
return super.drawChild(canvas, child, drawingTime);
}
return true;
}
ऑनआउट में मैं ellipseY ऑफसेट की गणना करता हूं। यह मध्य में चयनित दृश्य को लंबवत दृश्य में केंद्रित करता है, चाहे कोई अंडाकार आकार न हो।
ellipseYOffset = getMeasuredHeight() + (ellipseMinor - (getMeasuredHeight()/2));
"if (newtop> = 0)" भाग इसलिए है क्योंकि दृश्य अजीब स्थानों में यादृच्छिक रूप से खींचा जा रहा था। यह बंद कर दिया।
संपादित करें: पूर्ण कोड
कुछ एनीमेशन सामान आप की जरूरत नहीं है, मैं सिर्फ नकल की और मेरी कक्षा चिपकाया है।
public class Carousel extends Gallery {
private static final float INITIAL_MINOR_RATIO = 0.75f;
private static final float INITIAL_MAJOR_RATIO = 1.0f;
private int mEllipseMajor;
private int mEllipseMinor;
private int mEllipseMajor2;
private int mEllipseMinor2;
private int mEllipseYOffset;
private Animation mGalleryAlphaOut;
private Animation mGalleryAlphaIn;
private OnAnimationEndListener mFadeInEndListener;
private OnAnimationEndListener mFadeOutEndListener;
private boolean mCustomEllipseDim = false;
private boolean mInfinite = true;
private int mXOff = 0;
private AnimationListener mFadeInAnimationListener = new AnimationListener() {
public void onAnimationStart(Animation animation) {}
public void onAnimationRepeat(Animation animation) {}
public void onAnimationEnd(Animation animation) {
if(mFadeInEndListener != null)
{
mFadeInEndListener.onAnimationEnd();
}
}
};
private AnimationListener mFadeOutAnimationListener = new AnimationListener() {
public void onAnimationStart(Animation animation) {}
public void onAnimationRepeat(Animation animation) {}
public void onAnimationEnd(Animation animation) {
if(mFadeOutEndListener != null)
{
mFadeOutEndListener.onAnimationEnd();
}
}
};
public Carousel(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public Carousel(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public Carousel(Context context) {
super(context);
init();
}
private void init()
{
setHorizontalFadingEdgeEnabled(false);
setCallbackDuringFling(true);
setUnselectedAlpha(1.0f);
setHapticFeedbackEnabled(false);
int dur = getResources().getInteger(R.integer.transition_dur);
mGalleryAlphaOut = AnimationUtils.loadAnimation(getContext(), android.R.anim.fade_out);
mGalleryAlphaOut.setFillAfter(true);
mGalleryAlphaOut.setDuration(dur);
mGalleryAlphaOut.setAnimationListener(mFadeOutAnimationListener);
mGalleryAlphaIn = AnimationUtils.loadAnimation(getContext(), android.R.anim.fade_in);
mGalleryAlphaIn.setFillAfter(true);
mGalleryAlphaIn.setDuration(dur);
mGalleryAlphaIn.setAnimationListener(mFadeInAnimationListener);
}
public int getEllipseMajor() {
return mEllipseMajor;
}
public void setEllipseMajor(int ellipseMajor) {
if(ellipseMajor == 0)
{
mCustomEllipseDim = false;
}
this.mEllipseMajor = ellipseMajor;
}
public int getEllipseMinor() {
return mEllipseMinor;
}
public void setEllipseMinor(int ellipseMinor) {
if(ellipseMinor == 0)
{
mCustomEllipseDim = false;
}
this.mEllipseMinor = ellipseMinor;
}
@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
final int left = child.getLeft();
final int childWidth = child.getWidth();
final int childHeight = child.getHeight();
int adjustedXOrigin = left - mXOff + (childWidth>>1);
int newtop = (int) (mEllipseYOffset - Math.sqrt(mEllipseMinor2 * (1 - ((Math.pow(adjustedXOrigin, 2))/mEllipseMajor2))));
newtop -= (childHeight>>1);
if(newtop >= 0)
{
child.layout(left, newtop, left + childWidth, newtop + childHeight);
return super.drawChild(canvas, child, drawingTime);
}
return true;
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
if(!mCustomEllipseDim)
{
mEllipseMajor = (int) (getMeasuredWidth() * INITIAL_MAJOR_RATIO + 0.5f);
mEllipseMinor = (int) (getMeasuredHeight() * INITIAL_MINOR_RATIO + 0.5f);
mEllipseMajor2 = (int) Math.pow(mEllipseMajor, 2);
mEllipseMinor2 = (int) Math.pow(mEllipseMinor, 2);
}
mEllipseYOffset = getMeasuredHeight() + (mEllipseMinor - (getMeasuredHeight()/2));
mXOff = (getWidth()/2);
}
@Override
public void setAdapter(SpinnerAdapter adapter) {
super.setAdapter(adapter);
if(mInfinite)
{
resetPosition();
}
}
public void resetPosition()
{
int pos = Integer.MAX_VALUE/2;
if(getAdapter() != null && getAdapter().getClass() == CarouselAdapter.class)
{
int size = ((CarouselAdapter)getAdapter()).getList().size();
if(size > 2)
pos = pos - (pos % ((CarouselAdapter)getAdapter()).getList().size());
else
pos = 0;
setSelection(pos);
}
}
public OnAnimationEndListener getFadeInEndListener() {
return mFadeInEndListener;
}
public void setFadeInEndListener(OnAnimationEndListener fadeInEndListener) {
this.mFadeInEndListener = fadeInEndListener;
}
public OnAnimationEndListener getFadeOutEndListener() {
return mFadeOutEndListener;
}
public void setFadeOutEndListener(OnAnimationEndListener fadeOutEndListener) {
this.mFadeOutEndListener = fadeOutEndListener;
}
public void fadeIn()
{
startAnimation(mGalleryAlphaIn);
}
public void fadeOut()
{
startAnimation(mGalleryAlphaOut);
}
public interface OnAnimationEndListener
{
public abstract void onAnimationEnd();
}
//This disables the effect of a vehicle becoming focused when it is clicked.
@Override
public boolean onSingleTapUp(MotionEvent e) {
if(getAdapter() != null)
{
if(pointToPosition((int)e.getX(), (int)e.getY()) != getSelectedItemPosition())
return true;
else
return super.onSingleTapUp(e);
}
else
return true;
}
}
hiii आप तो मैं भी मेरी घुमावदार गैलरी में लागू कर सकते हैं – Mahesh