利用MVC编写广告条轮播效果

<!--轮播图--  
  <RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="328px"  
 
    <android.support.v4.view.ViewPager 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:id="@+id/fragment_work_pic_viewpager"/  
 
    <!-- 指针容器 --  
 
    <RelativeLayout 
      android:background="@android:color/transparent" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:padding="5dp" 
      android:layout_alignBottom="@id/fragment_work_pic_viewpager"  
 
    <!--<TextView 
      android:textSize="12sp" 
      android:layout_gravity="left" 
      android:layout_marginLeft="5dp" 
      android:id="@+id/tv_desc" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textColor="@android:color/white" 
      android:text="图片的描述"/ --  
 
    <LinearLayout 
      android:layout_centerHorizontal="true" 
      android:layout_centerVertical="true" 
      android:id="@+id/ll_dots" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:orientation="horizontal"  
 
      </LinearLayout  
    </RelativeLayout  

package com.hanzheng.znxl.fragment; 
import android.support.v4.view.ViewPager; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.RelativeLayout; 
import com.hanzheng.znxl.R; 
import com.hanzheng.znxl.adapter.OnPagerChangeListenerImp; 
import com.hanzheng.znxl.adapter.WorkFragmentBannerAdapter; 
import com.hanzheng.znxl.base.BaseFragment; 
import com.hanzheng.znxl.base.MyApplication; 
import com.hanzheng.znxl.utils.ToastUtil; 
import butterknife.Bind; 
import butterknife.ButterKnife; 
import butterknife.OnClick; 
/** 
* Created by zmybi on 29/12/2016. 
*/ 
public class WorkFragment extends BaseFragment { 
@Bind(R.id.fragment_work_pic_viewpager) 
ViewPager mFragmentWorkPicViewpager; 
@Bind(R.id.ll_dots) 
LinearLayout mLLDots; 
//  @Bind(R.id.tv_desc) 
//  TextView mTvDesc; 
@Bind(R.id.ll_kaoqing) 
LinearLayout mLlKaoqing; 
@Bind(R.id.ll_execute) 
LinearLayout mLlExecute; 
@Bind(R.id.ll_daohang) 
LinearLayout mLlDaohang; 
@Bind(R.id.ll_sudden) 
LinearLayout mLlSudden; 
@Bind(R.id.ll_policething) 
LinearLayout mLlPolicething; 
@Bind(R.id.ll_collect) 
LinearLayout mLlCollect; 
@Bind(R.id.ll_search) 
LinearLayout mLlSearch; 
@Bind(R.id.ll_noticevoice) 
LinearLayout mLlNoticevoice; 
@Bind(R.id.iv_book) 
ImageView mIvBook; 
@Bind(R.id.rl_shouce) 
RelativeLayout mRlShouce; 
@Bind(R.id.ibtn_yuan) 
ImageView mIbtnYuan; 
@Bind(R.id.ibtn_helpbook) 
ImageView mIbtnHelpbook; 
private int[] imageResIds = {R.drawable.banner1,R.drawable.banner2}; 
private String[] descs = {"武汉保安集团","智能巡逻系统"}; 
private AutoScrollTask mAutoScrollTask; 
@Override 
public void initData() { 
mFragmentWorkPicViewpager.addOnPageChangeListener(new OnPagerChangeListenerImp() { 
@Override 
public void onPageSelected(int position) { 
changeDotAndDesc(position); 
} 
}); 
mFragmentWorkPicViewpager.setAdapter(new WorkFragmentBannerAdapter(imageResIds)); 
initDot(); 
changeDotAndDesc(0);  //默认选择第一页 
mFragmentWorkPicViewpager.setCurrentItem(mFragmentWorkPicViewpager.getAdapter().getCount() / 2); 
if(mAutoScrollTask == null) { 
mAutoScrollTask = new AutoScrollTask(); 
mAutoScrollTask.start(); 
} 
//按下去停止轮播 
mFragmentWorkPicViewpager.setOnTouchListener(new View.OnTouchListener() { 
@Override 
public boolean onTouch(View view, MotionEvent motionEvent) { 
switch (motionEvent.getAction()) { 
case MotionEvent.ACTION_DOWN: 
case MotionEvent.ACTION_MOVE: 
mAutoScrollTask.stop(); 
break; 
case MotionEvent.ACTION_UP: 
mAutoScrollTask.start(); 
break; 
} 
return false; 
} 
}); 
} 
private void changeDotAndDesc(int position) { 
position = position % imageResIds.length; 
//    mTvDesc.setText(descs[position]); 
for(int i = 0; i < mLLDots.getChildCount();i++) { 
ImageView iv_dot = (ImageView) mLLDots.getChildAt(i); 
iv_dot.setSelected(false); 
if(position == i) { 
iv_dot.setSelected(true); 
} 
} 
} 
private void initDot() { 
for(int i = 0; i < imageResIds.length;i++) { 
int _5dp = dp2px(5); 
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(_5dp,_5dp); 
params.leftMargin = _5dp; 
ImageView dot = new ImageView(mActivity); 
dot.setLayoutParams(params); 
dot.setBackgroundResource(R.drawable.selector_dot); 
mLLDots.addView(dot); 
} 
} 
public int dp2px(int dp) { 
float density = getResources().getDisplayMetrics().density; 
return (int) (dp * density + .5f); 
} 
@Override 
public View initView() { 
// TODO: inflate a fragment view 
View rootView = View.inflate(mActivity,R.layout.fragment_work,null); 
ButterKnife.bind(this, rootView); 
return rootView; 
} 
@Override 
public void onDestroyView() { 
super.onDestroyView(); 
ButterKnife.unbind(this); 
} 
@OnClick({R.id.rl_shouce,R.id.ibtn_yuan, R.id.ibtn_helpbook,R.id.ll_kaoqing, R.id.ll_execute, R.id.ll_daohang, R.id.ll_sudden, R.id.ll_policething, R.id.ll_collect, R.id.ll_search, R.id.ll_noticevoice}) 
public void onClick(View view) { 
switch (view.getId()) { 
case R.id.ll_kaoqing: 
ToastUtil.showToast(mActivity,"考勤"); 
break; 
case R.id.ll_execute: 
ToastUtil.showToast(mActivity,"勤务"); 
break; 
case R.id.ll_daohang: 
ToastUtil.showToast(mActivity,"网店"); 
break; 
case R.id.ll_sudden: 
ToastUtil.showToast(mActivity,"突发"); 
break; 
case R.id.ll_policething: 
ToastUtil.showToast(mActivity,"警情"); 
break; 
case R.id.ll_collect: 
ToastUtil.showToast(mActivity,"认证"); 
break; 
case R.id.ll_search: 
ToastUtil.showToast(mActivity,"信息查询"); 
break; 
case R.id.ll_noticevoice: 
ToastUtil.showToast(mActivity,"发布公告"); 
break; 
case R.id.rl_shouce: 
ToastUtil.showToast(mActivity,"手册"); 
break; 
case R.id.ibtn_yuan: 
ToastUtil.showToast(mActivity,"预案流程"); 
break; 
case R.id.ibtn_helpbook: 
ToastUtil.showToast(mActivity,"帮助手册"); 
break; 
} 
} 
private class AutoScrollTask implements Runnable{ 
public void start() { 
stop(); 
MyApplication.getMainThreadHandler().postDelayed(this,2000); 
} 
public void stop() { 
MyApplication.getMainThreadHandler().removeCallbacks(this); 
} 
@Override 
public void run() { 
int currentItem = mFragmentWorkPicViewpager.getCurrentItem(); 
currentItem++; 
mFragmentWorkPicViewpager.setCurrentItem(currentItem); 
start(); 
} 
} 
} 

package com.hanzheng.znxl.adapter; 
import android.support.v4.view.PagerAdapter; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
/** 
* Created by zmybi on 31/12/2016. 
*/ 
public class WorkFragmentBannerAdapter extends PagerAdapter { 
private int[] imageResIds; 
public WorkFragmentBannerAdapter(int[] imageResIds) { 
this.imageResIds = imageResIds; 
} 
@Override 
public int getCount() { 
return imageResIds.length * 1000000; 
} 
@Override 
public boolean isViewFromObject(View view, Object object) { 
return view == object; 
} 
@Override 
public Object instantiateItem(ViewGroup container, int position) { 
ImageView iv = new ImageView(container.getContext()); 
position = position % imageResIds.length; 
iv.setBackgroundResource(imageResIds[position]); 
iv.setScaleType(ImageView.ScaleType.FIT_XY); 
container.addView(iv); 
return iv; 
} 
@Override 
public void destroyItem(ViewGroup container, int position, Object object) { 
container.removeView((ImageView)object); 
} 
}