android 广告栏效果,实现android广告栏效果

于 2021-05-25 18:29:19 发布
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文章标签： android 广告栏效果

public classBannerLayout extendsRelativeLayout {

privateViewPager mViewPager; // 轮播容器// 指示器(圆点)容器privateLinearLayout indicatorContainer;

privateDrawable unSelectedDrawable;

privateDrawable selectedDrawable;

private intWHAT_AUTO_PLAY= 1000;

private booleanisAutoPlay= true; // 自动轮播private intitemCount;

private intselectedIndicatorColor= 0xffff0000;

private intunSelectedIndicatorColor= 0x88888888;

private inttitleBGColor= 0X33000000;

private inttitleColor= 0Xffffffff;

privateShape indicatorShape= Shape.oval;

private intselectedIndicatorHeight= 20;

private intselectedIndecatorWidth= 20;

private intunSelectedIndicatorHeight= 20;

private intunSelectedIndecatorWidth= 20;

private intautoPlayDuration= 4000;

private intscrollDuration= 900;

// 指示器中点和点之间的距离private intindicatorSpace= 15;

// 指示器整体的设置private intindicatorMargin= 20;

private static final inttitlePadding= 20;

private intdefaultImage;

private enumShape {

// 矩形 或 圆形的指示器rect, oval}

privateOnBannerItemClickListener mOnBannerItemClickListener;

privateHandler mHandler= newHandler(newHandler.Callback() {

@Overridepublic booleanhandleMessage(Message msg) {

if(msg.what== WHAT_AUTO_PLAY) {

if(mViewPager!= null) {

mViewPager.setCurrentItem(mViewPager.getCurrentItem() + 1, true);

mHandler.sendEmptyMessageDelayed(WHAT_AUTO_PLAY, autoPlayDuration);

}

}

return false;

}

});

publicBannerLayout(Context context) {

super(context);

init(null, 0);

}

publicBannerLayout(Context context, AttributeSet attrs) {

super(context, attrs);

init(attrs, 0);

}

publicBannerLayout(Context context, AttributeSet attrs, intdefStyleAttr) {

super(context, attrs, defStyleAttr);

init(attrs, defStyleAttr);

}

private voidinit(AttributeSet attrs, intdefStyleAttr) {

TypedArray array = getContext().obtainStyledAttributes(attrs, R.styleable.BannerLayoutStyle, defStyleAttr, 0);

selectedIndicatorColor= array.getColor(R.styleable.BannerLayoutStyle_selectedIndicatorColor, selectedIndicatorColor);

unSelectedIndicatorColor= array.getColor(R.styleable.BannerLayoutStyle_unSelectedIndicatorColor, unSelectedIndicatorColor);

titleBGColor= array.getColor(R.styleable.BannerLayoutStyle_titleBGColor, titleBGColor);

titleColor= array.getColor(R.styleable.BannerLayoutStyle_titleColor, titleColor);

intshape = array.getInt(R.styleable.BannerLayoutStyle_indicatorShape, Shape.oval.ordinal());

for(Shape shape1 : Shape.values()) {

if(shape1.ordinal() == shape) {

indicatorShape= shape1;

break;

}

}

selectedIndecatorWidth= (int) array.getDimension(R.styleable.BannerLayoutStyle_selectedIndicatorWidth, selectedIndecatorWidth);

selectedIndicatorHeight= (int) array.getDimension(R.styleable.BannerLayoutStyle_selectedIndicatorHeight, selectedIndicatorHeight);

unSelectedIndecatorWidth= (int) array.getDimension(R.styleable.BannerLayoutStyle_unSelectedIndicatorWidth, unSelectedIndecatorWidth);

unSelectedIndicatorHeight= (int) array.getDimension(R.styleable.BannerLayoutStyle_unSelectedIndicatorHeight, unSelectedIndicatorHeight);

indicatorSpace= (int) array.getDimension(R.styleable.BannerLayoutStyle_indicatorSpace, indicatorSpace);

indicatorMargin= (int) array.getDimension(R.styleable.BannerLayoutStyle_indicatorMargin, indicatorMargin);

autoPlayDuration= array.getInt(R.styleable.BannerLayoutStyle_autoPlayDuration, autoPlayDuration);

scrollDuration= array.getInt(R.styleable.BannerLayoutStyle_scrollDuration, scrollDuration);

isAutoPlay= array.getBoolean(R.styleable.BannerLayoutStyle_isAutoPlay, isAutoPlay);

defaultImage= array.getResourceId(R.styleable.BannerLayoutStyle_defaultImage, defaultImage);

array.recycle();

LayerDrawable unSelectedLayerDrawable;

LayerDrawable selectedLayerDrawable;

GradientDrawable unSelectedGradientDrawable = newGradientDrawable();

GradientDrawable selectedGradientDtawbale = newGradientDrawable();

switch(indicatorShape) {

caserect:

unSelectedGradientDrawable.setShape(GradientDrawable.RECTANGLE);

selectedGradientDtawbale.setShape(GradientDrawable.RECTANGLE);

break;

caseoval:

unSelectedGradientDrawable.setShape(GradientDrawable.OVAL);

selectedGradientDtawbale.setShape(GradientDrawable.OVAL);

break;

}

unSelectedGradientDrawable.setColor(unSelectedIndicatorColor);

unSelectedGradientDrawable.setSize(unSelectedIndecatorWidth, unSelectedIndicatorHeight);

unSelectedLayerDrawable = newLayerDrawable(newDrawable[]{unSelectedGradientDrawable});

unSelectedDrawable= unSelectedLayerDrawable;

selectedGradientDtawbale.setColor(selectedIndicatorColor);

selectedGradientDtawbale.setSize(selectedIndecatorWidth, selectedIndicatorHeight);

selectedLayerDrawable = newLayerDrawable(newDrawable[]{selectedGradientDtawbale});

selectedDrawable= selectedLayerDrawable;

}

/*** 添加本地图片**@paramviewRes图片id集合*@paramtitles标题集合，可空*/public voidsetViewRes(List viewRes, List titles) {

List views = newArrayList<>();

itemCount= viewRes.size();

if(titles != null&& titles.size() != viewRes.size()) {

throw newIllegalStateException("views.size() != titles.size()");

}

// 把数量拼凑到三个以上if(itemCount< 1) {

throw newIllegalStateException("item count not equal zero");

} else if(itemCount< 2) {

views.add(getFrameLayoutView(viewRes.get(0), titles != null? titles.get(0) : null, 0));

views.add(getFrameLayoutView(viewRes.get(0), titles != null? titles.get(0) : null, 0));

views.add(getFrameLayoutView(viewRes.get(0), titles != null? titles.get(0) : null, 0));

} else if(itemCount< 3) {

views.add(getFrameLayoutView(viewRes.get(0), titles != null? titles.get(0) : null, 0));

views.add(getFrameLayoutView(viewRes.get(1), titles != null? titles.get(1) : null, 1));

views.add(getFrameLayoutView(viewRes.get(0), titles != null? titles.get(0) : null, 0));

views.add(getFrameLayoutView(viewRes.get(1), titles != null? titles.get(1) : null, 1));

} else{

for(inti = 0; i < viewRes.size(); i++) {

views.add(getFrameLayoutView(viewRes.get(i), titles != null? titles.get(i) : null, i));

}

}

setViews(views);

}

//添加网络图片路径public voidsetViewUrls(Context context,List urls, List titles) {

List views = newArrayList<>();

itemCount= urls.size();

Log.e("TAG",titles.size()+"---90---"+urls.size());

if(titles != null&& titles.size() != itemCount) {

throw newIllegalStateException("views.size() != titles.size()");

}

//主要是解决当item为小于3个的时候滑动有问题，这里将其拼凑成3个以上if(itemCount< 1) {//当item个数0throw newIllegalStateException("item count not equal zero");

} else if(itemCount< 2) { //当item个数为1views.add(getFrameLayoutView(context,urls.get(0), titles != null? titles.get(0) : null, 0));

views.add(getFrameLayoutView(context,urls.get(0), titles != null? titles.get(0) : null, 0));

views.add(getFrameLayoutView(context,urls.get(0), titles != null? titles.get(0) : null, 0));

} else if(itemCount< 3) {//当item个数为2views.add(getFrameLayoutView(context,urls.get(0), titles != null? titles.get(0) : null, 0));

views.add(getFrameLayoutView(context,urls.get(1), titles != null? titles.get(1) : null, 1));

views.add(getFrameLayoutView(context,urls.get(0), titles != null? titles.get(0) : null, 0));

views.add(getFrameLayoutView(context,urls.get(1), titles != null? titles.get(1) : null, 1));

} else{

for(inti = 0; i < urls.size(); i++) {

views.add(getFrameLayoutView(context,urls.get(i), titles != null? titles.get(i) : null, i));

}

}

setViews(views);

}

private voidsetViews(finalList views) {

mViewPager= newViewPager(getContext());

addView(mViewPager);

setSliderTransformDuration(scrollDuration);

//初始化indicatorContainerindicatorContainer= newLinearLayout(getContext());

indicatorContainer.setGravity(Gravity.CENTER_VERTICAL);

LayoutParams params = newLayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

// 设置 指示点的位置 ALIGN_PARENT_RIGHT表示居右 CENTER_HORIZONTAL表示居中params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

//设置marginparams.setMargins(indicatorMargin, indicatorMargin, indicatorMargin, indicatorMargin);

//添加指示器容器布局到SliderLayoutaddView(indicatorContainer, params);

//初始化指示器，并添加到指示器容器布局for(inti = 0; i < itemCount; i++) {

ImageView indicator = newImageView(getContext());

indicator.setLayoutParams(newViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));

indicator.setPadding(indicatorSpace, indicatorSpace, indicatorSpace, indicatorSpace);

indicator.setImageDrawable(unSelectedDrawable);

indicatorContainer.addView(indicator);

}

LoopPagerAdapter pagerAdapter = newLoopPagerAdapter(views);

mViewPager.setAdapter(pagerAdapter);

//设置当前item到Integer.MAX_VALUE中间的一个值，看起来像无论是往前滑还是往后滑都是ok的//如果不设置，用户往左边滑动的时候已经划不动了inttargetItemPosition = Integer.MAX_VALUE/ 2- Integer.MAX_VALUE/ 2% itemCount;

mViewPager.setCurrentItem(targetItemPosition);

switchIndicator(targetItemPosition % itemCount);

mViewPager.addOnPageChangeListener(newViewPager.SimpleOnPageChangeListener() {

@Overridepublic voidonPageSelected(intposition) {

switchIndicator(position % itemCount);

}

});

startAutoPlay();

}

/*** 开始自动轮播*/public voidstartAutoPlay() {

stopAutoPlay(); // 避免重复消息if(isAutoPlay) {

mHandler.sendEmptyMessageDelayed(WHAT_AUTO_PLAY, autoPlayDuration);

}

}

@Overrideprotected voidonWindowVisibilityChanged(intvisibility) {

super.onWindowVisibilityChanged(visibility);

if(visibility == VISIBLE) {

startAutoPlay();

} else{

stopAutoPlay();

}

}

/*** 停止自动轮播*/public voidstopAutoPlay() {

if(isAutoPlay) {

mHandler.removeMessages(WHAT_AUTO_PLAY);

}

}

private voidsetSliderTransformDuration(intscrollDuration) {

try{

Field mScroller = ViewPager.class.getDeclaredField("mScroller");

mScroller.setAccessible(true);

FixedSpeedScroller fixedSpeedScroller = newFixedSpeedScroller(mViewPager.getContext(), null, scrollDuration);

mScroller.set(mViewPager, fixedSpeedScroller);

} catch(Exception e) {

e.printStackTrace();

}

}

@Overridepublic booleandispatchTouchEvent(MotionEvent ev) {

switch(ev.getAction()) {

caseMotionEvent.ACTION_DOWN:

stopAutoPlay();

break;

caseMotionEvent.ACTION_CANCEL:

caseMotionEvent.ACTION_UP:

startAutoPlay();

break;

}

return super.dispatchTouchEvent(ev);

}

/*** 切换指示器状态**@paramcurrentPosition当前位置*/private voidswitchIndicator(intcurrentPosition) {

for(inti = 0; i < indicatorContainer.getChildCount(); i++) {

((ImageView) indicatorContainer.getChildAt(i)).setImageDrawable(i == currentPosition ? selectedDrawable: unSelectedDrawable);

}

}

public voidsetOnBannerItemClickListener(OnBannerItemClickListener onBannerItemClickListener) {

this.mOnBannerItemClickListener= onBannerItemClickListener;

}

@NonNullprivateFrameLayout getFrameLayoutView(Context context, String url, String title, final intposition) {

FrameLayout frameLayout = newFrameLayout(getContext());

FrameLayout.LayoutParams layoutParams = newFrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

layoutParams.gravity= Gravity.CENTER;

ImageView imageView = newImageView(getContext());

frameLayout.addView(imageView);

frameLayout.setOnClickListener(newOnClickListener() {

@Overridepublic voidonClick(View v) {

if(mOnBannerItemClickListener!= null) {

mOnBannerItemClickListener.onItemClick(position);

}

}

});

imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

if(defaultImage!= 0){

Glide.with(getContext()).load(url).placeholder(defaultImage).centerCrop().into(imageView);

}else{

Glide.with(getContext()).load(url).centerCrop().into(imageView);

}

if(!TextUtils.isEmpty(title)) {

TextView textView = newTextView(getContext());

textView.setText(title);

textView.setTextColor(titleColor);

textView.setPadding(titlePadding, titlePadding, titlePadding, titlePadding);

textView.setBackgroundColor(titleBGColor);

textView.getPaint().setFakeBoldText(true);

layoutParams.gravity= Gravity.BOTTOM;

frameLayout.addView(textView, layoutParams);

}

returnframeLayout;

}

@NonNullprivateFrameLayout getFrameLayoutView(Integer res, String title, final intposition) {

FrameLayout frameLayout = newFrameLayout(getContext());

FrameLayout.LayoutParams layoutParams = newFrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

layoutParams.gravity= Gravity.CENTER;

ImageView imageView = newImageView(getContext());

frameLayout.addView(imageView);

frameLayout.setOnClickListener(newOnClickListener() {

@Overridepublic voidonClick(View v) {

if(mOnBannerItemClickListener!= null) {

mOnBannerItemClickListener.onItemClick(position);

}

}

});

imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

Glide.with(getContext()).load(res).centerCrop().into(imageView);

if(!TextUtils.isEmpty(title)) {

TextView textView = newTextView(getContext());

textView.setText(title);

textView.setTextColor(titleColor);

textView.setPadding(titlePadding, titlePadding, titlePadding, titlePadding);

textView.setBackgroundColor(titleBGColor);

textView.getPaint().setFakeBoldText(true);

layoutParams.gravity= Gravity.BOTTOM;

frameLayout.addView(textView, layoutParams);

}

returnframeLayout;

}

public interfaceOnBannerItemClickListener {

voidonItemClick(intposition);

}

public classLoopPagerAdapter extendsPagerAdapter {

privateList views;

publicLoopPagerAdapter(List views) {

this.views= views;

}

@Overridepublic intgetCount() {

//Integer.MAX_VALUE = 2147483647returnInteger.MAX_VALUE;

}

@Overridepublic booleanisViewFromObject(View view, Object object) {

returnview == object;

}

@OverridepublicObject instantiateItem(ViewGroup container, intposition) {

if(views.size() > 0) {

//position % view.size()是指虚拟的position会在[0，view.size())之间循环View view = views.get(position % views.size());

if(container.equals(view.getParent())) {

container.removeView(view);

}

container.addView(view);

returnview;

}

return null;

}

@Overridepublic voiddestroyItem(ViewGroup container, intposition, Object object) {

}

}

public classFixedSpeedScroller extendsScroller {

private intmDuration= 1000;

publicFixedSpeedScroller(Context context) {

super(context);

}

publicFixedSpeedScroller(Context context, Interpolator interpolator) {

super(context, (android.view.animation.Interpolator) interpolator);

}

publicFixedSpeedScroller(Context context, Interpolator interpolator, intduration) {

this(context, interpolator);

mDuration= duration;

}

@Overridepublic voidstartScroll(intstartX, intstartY, intdx, intdy, intduration) {

// Ignore received duration, use fixed one insteadsuper.startScroll(startX, startY, dx, dy, mDuration);

}

@Overridepublic voidstartScroll(intstartX, intstartY, intdx, intdy) {

// Ignore received duration, use fixed one insteadsuper.startScroll(startX, startY, dx, dy, mDuration);

}

}

}

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