图片轮播
https://github.com/youth5201314/banner
compile 'com.youth.banner:banner:+'
compile "com.github.bumptech.glide:glide:3.7.0"
<?xml version="1.0" encoding="utf-8"?>
<com.youth.banner.Banner xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/banner"
android:layout_width="match_parent"
android:layout_height="match_parent" />
public class GlideImageLoader extends ImageLoader {
@Override
public void displayImage(Context context, Object path, ImageView imageView) {
//具体方法内容自己去选择，次方法是为了减少banner过多的依赖第三方包，所以将这个权限开放给使用者去选择
Glide.with(context.getApplicationContext())
.load(path)
.crossFade()
.into(imageView);
}
}
final View header = LayoutInflater.from(getActivity()).inflate(R.layout.header, (ViewGroup) getActivity().findViewById(android.R.id.content), false);
mLRecyclerViewAdapter.addHeaderView(header);
banner = (Banner) header.findViewById(R.id.banner);
DisplayMetrics dm = getActivity().getResources().getDisplayMetrics();
H = dm.widthPixels;
banner.setLayoutParams(new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, H / 3));
banner.setBannerAnimation(AccordionTransformer.class);
//简单使用
banner.setImages(imgesUrl)
.setImageLoader(new GlideImageLoader())
.setOnBannerListener(new OnBannerListener() {
@Override
public void OnBannerClick(int position) {
ToastUtil.makeToast("" + position);
}
})
.start();
lvLiveRoom.addHeaderView(banner);
//更新图片数据
banner.update(imgesUrl);
//图片轮播开始
banner.startAutoPlay();
//轮播停止
banner.stopAutoPlay();
//界面显示
@Override
public void onStart() {
super.onStart();
banner.startAutoPlay();
}
//界面不显示
@Override
public void onStop() {
super.onStop();
banner.stopAutoPlay();
}
1.添加布局fragment_hall_head.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/transparent"
android:orientation="vertical">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="300px">
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="300px" />
<LinearLayout
android:id="@+id/ll_points"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginBottom="11dp"
android:orientation="horizontal" />
</FrameLayout>
</LinearLayout>
2.添加资源文件
shape_xiao_yuan_quan_selected.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size
android:width="8dp"
android:height="8dp" />
<stroke
android:width="1px"
android:color="@color/colorAccent" />
<solid android:color="@color/colorAccent" />
</shape>
shape_xiao_yuan_quan_nomal.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size
android:width="8dp"
android:height="8dp" />
<stroke
android:width="1px"
android:color="@color/white" />
<solid android:color="@color/white" />
</shape>
3.代码：
初始化数据：
View bannerHead;
private LinearLayout llPoints; //图片里面的小圆点
private ViewPager viewPager; //图片轮播
List<String> imgesUrl;
初始化图片：
bannerHead = View.inflate(mContext, R.layout.fragment_hall_head, null);
viewPager = (ViewPager) bannerHead.findViewById(R.id.viewPager);
llPoints = (LinearLayout) bannerHead.findViewById(R.id.ll_points);
imgesUrl = new ArrayList<>();
imgesUrl.add("http://img3.fengniao.com/forum/attachpics/913/114/36502745.jpg");
imgesUrl.add("http://imageprocess.yitos.net/images/public/20160910/99381473502384338.jpg");
imgesUrl.add("http://imageprocess.yitos.net/images/public/20160910/77991473496077677.jpg");
imgesUrl.add("http://imageprocess.yitos.net/images/public/20160906/1291473163104906.jpg");
dealLunBo();
初始化進行圖片的處理：
/**
* 处理轮播图
*/
private void dealLunBo() {
MyPagerAdapter myPagerAdapter = new MyPagerAdapter();
viewPager.setAdapter(myPagerAdapter);
viewPager.setCurrentItem(imgesUrl.size() * 10000);
startRool();
//初始化ViewPager轮播小圆圈
llPoints.removeAllViews();
for (int i = 0; i < imgesUrl.size(); i++) {
ImageView point = new ImageView(getActivity());
if (i == 0) {
point.setImageResource(R.drawable.shape_xiao_yuan_quan_selected);
} else {
point.setImageResource(R.drawable.shape_xiao_yuan_quan_nomal);
}
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
if (i > 0) {
params.leftMargin = UiUtils.dp2px(getContext(), 8);
}
llPoints.addView(point, params);
}
//ViewPager的轮播效果(小圆圈改变)
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
position = position % imgesUrl.size();
for (int i = 0; i < llPoints.getChildCount(); i++) {
ImageView image = (ImageView) llPoints.getChildAt(i);
if (i == position) {
image.setImageResource(R.drawable.shape_xiao_yuan_quan_selected);
} else {
image.setImageResource(R.drawable.shape_xiao_yuan_quan_nomal);
}
}
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
/**
* 轮播图的adapter
*/
class MyPagerAdapter extends PagerAdapter {
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = new ImageView(getActivity());
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
ImageLoader.getInstance().displayImage(imgesUrl.get(position % imgesUrl.size()), imageView);
imageView.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
handler.removeCallbacksAndMessages(null);
break;
case MotionEvent.ACTION_UP:
handler.sendEmptyMessageDelayed(1, 2000);
break;
/**
* 当保持按下操作，并从此控件移到外层控件时，就会触发ACTION_CANCEL事件时，
* 当前的手势被中断，不会在接收它的记录
* 将它当做ACTION_UP事件进行处理比较好
*/
case MotionEvent.ACTION_CANCEL:
handler.sendEmptyMessageDelayed(1, 2000);
break;
default:
break;
}
// true处理这个事件
return true;
}
});
container.addView(imageView);
return imageView;
}
}
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 1) {
int currentItem = viewPager.getCurrentItem();
currentItem++;
viewPager.setCurrentItem(currentItem);
startRool();
}
}
};
private void startRool() {
handler.sendEmptyMessageDelayed(1, 3000);
}
