之前封装过一个，但总觉得不够优雅，就有了这个通用封装，很简洁，不知道够不够优雅，不过原来那个有跟随指示器和丝滑滑动效果，感兴趣可以看一下。
封装过程
1、自定义属性
selectPoint：选中指示器图标
normalPoint：未选中指示器图标
pointWidth：图标宽度
switchTime：轮播间隔事件
location：指示器位置，下中或下右
<declare-styleable name="NewBannerView">
<attr name="selectPoint" format="reference" />
<attr name="normalPoint" format="reference" />
<attr name="pointWidth" format="dimension" />
<attr name="switchTime" format="integer" />
<attr name="location">
<enum name="CENTER" value="0" />
<enum name="RIGHT" value="1" />
</attr>
</declare-styleable>
2、初始化View
初始化ViewPager和指示器组合View
3、绑定数据源
通过setImageData设置轮播图数据源
4、绑定点击事件
通过OnPageClickListener绑定点击事件
5、开启关闭轮播
start和stop方法开启和关闭轮播
用法
xml中
<com.goldou.lovesee.view.NewBannerView
android:id="@+id/bannerView"
android:layout_width="match_parent"
app:selectPoint="@drawable/red_point"
app:normalPoint="@drawable/gray_point"
app:switchTime="4000"
app:location="RIGHT"
android:layout_height="200dp" />
activity中
int[] imageList = {R.drawable.me_top, R.drawable.me_top, R.drawable.me_top, R.drawable.me_top};
NewBannerView bannerView = view.findViewById(R.id.bannerView);
bannerView.setImageData(imageList);
bannerView.start();
bannerView.setOnPageClickListener(new NewBannerView.OnPageClickListener() {
@Override
public void onPageClick(int position) {
Toast.makeText(getActivity(), position + "", Toast.LENGTH_SHORT).show();
}
});
BannerView
public class NewBannerView extends RelativeLayout implements View.OnClickListener {
private Context context;
private int selectPoint, normalPoint;
private float pointWidth = 7;
private int location;
private int CENTER = 0, RIGHT = 1;
private int lastPosition = 0;
private ViewPager viewPager;
private int switchTime = 5000;
private int[] images;
private OnPageClickListener onPageClickListener;
private Handler handler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
if (msg.what == 101) {
viewPager.setCurrentItem(viewPager.getCurrentItem() + 1);
start();
}
return false;
}
});
public NewBannerView(Context context) {
this(context, null);
}
public NewBannerView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public NewBannerView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context = context;
initAttr(attrs);
}
private void initAttr(AttributeSet attrs) {
TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.NewBannerView);
selectPoint = array.getResourceId(R.styleable.NewBannerView_selectPoint, R.mipmap.ic_launcher_round);
normalPoint = array.getResourceId(R.styleable.NewBannerView_normalPoint, R.mipmap.ic_launcher_round);
pointWidth = array.getDimension(R.styleable.NewBannerView_pointWidth, pointWidth);
location = array.getInteger(R.styleable.NewBannerView_location, RIGHT);
switchTime = array.getInteger(R.styleable.NewBannerView_switchTime, switchTime);
array.recycle();
}
public void setImageData(final int[] images) {
this.images = images;
final LinearLayout ll_point = new LinearLayout(context);
LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
layoutParams.addRule(ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
layoutParams.bottomMargin = 20;
if (location == CENTER) {
layoutParams.addRule(CENTER_HORIZONTAL, RelativeLayout.TRUE);
} else {
layoutParams.addRule(ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
layoutParams.rightMargin = 20;
}
LinearLayout.LayoutParams params1 = new LinearLayout.LayoutParams(UIUtil.dip2px(pointWidth), UIUtil.dip2px(pointWidth));
LinearLayout.LayoutParams params2 = new LinearLayout.LayoutParams(UIUtil.dip2px(pointWidth), UIUtil.dip2px(pointWidth));
params1.leftMargin = 0;
params2.leftMargin = UIUtil.dip2px(pointWidth);
for (int i = 0; i < images.length; i++) {
ImageView point = new ImageView(context);
if (i == 0) {
point.setBackgroundResource(selectPoint);
point.setLayoutParams(params1);
} else {
point.setBackgroundResource(normalPoint);
point.setLayoutParams(params2);
}
ll_point.addView(point);
}
viewPager = new ViewPager(context);
viewPager.setAdapter(new BannerAdapter());
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
position = position % images.length;
if (lastPosition == position) {
return;
}
ll_point.getChildAt(position).setBackgroundResource(selectPoint);
ll_point.getChildAt(lastPosition).setBackgroundResource(normalPoint);
lastPosition = position;
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
LayoutParams layoutParams1 = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
addView(viewPager, layoutParams1);
addView(ll_point, layoutParams);
}
public void start() {
handler.sendEmptyMessageDelayed(101, switchTime);
}
public void stop() {
handler.removeCallbacksAndMessages(null);
}
private int getCurrentItem() {
return viewPager.getCurrentItem() % images.length;
}
@Override
public void onClick(View view) {
onPageClickListener.onPageClick(getCurrentItem());
}
public interface OnPageClickListener {
void onPageClick(int position);
}
public void setOnPageClickListener(OnPageClickListener onPageClickListener) {
this.onPageClickListener = onPageClickListener;
}
private class BannerAdapter extends PagerAdapter {
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
position = position % images.length;
ImageView imageView = new ImageView(context);
imageView.setImageResource(images[position]);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setOnClickListener(NewBannerView.this);
container.addView(imageView);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
