//mainactivity
public class B1Fragment extends Fragment {
//图片数组
private int[] mPic=new int[]{R.mipmap.a,R.mipmap.b,R.mipmap.c,R.mipmap.d};
private ViewPager mShowVp;
private int aaa=0;
private Handler mHandler=new Handler(){
@Override
public void handleMessage(Message msg) {
aaa++;
mShowVp.setCurrentItem(aaa);
sendEmptyMessageDelayed(0,2000);
}
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_b1, null);
initView(view);
return view;
}
private void initView(View view) {
mShowVp = view.findViewById(R.id.Show_vp1);
// MyVpAdapter madapter=new MyVpAdapter();
mShowVp.setAdapter(new MyVpAdapter(getContext()));
mHandler.sendEmptyMessageDelayed(0,2000);
}
}
//适配器
public class MyVpAdapter extends PagerAdapter {
private Context mContext;
public MyVpAdapter(Context mContext) {
this.mContext = mContext;
}
private int[] mPic=new int[]{R.mipmap.a,R.mipmap.b,R.mipmap.c,R.mipmap.d};
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
@Override
public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {
return view==o;
}
@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position) {
//查找控件
ImageView mImg=new ImageView(mContext);
//设置图片
mImg.setImageResource(mPic[position%mPic.length]);
//设置宽和高
mImg.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT));
//设置图片方向
mImg.setScaleType(ImageView.ScaleType.FIT_XY);
container.addView(mImg);
return mImg;
}
@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
// super.destroyItem(container, position, object);
container.removeView((View) object);
}
}
//布局
<android.support.v4.view.ViewPager
android:id="@+id/Show_vp1"
android:layout_width=“match_parent”
android:layout_height=“180dp”></android.support.v4.view.ViewPager>