ViewPager之PagerAdapter

1、布局文件

<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>

2、Activity代码

public class MainActivity extends AppCompatActivity implements Into{
private ViewPager viewPager;
private MyViewPagerAdapter myViewPagerAdapter;
private ArrayList<View> datas;
////    private MyAsyncTask myAsyncTask;
//    private ImageView imageView;
//    private TextView textTv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.view_pager);
datas = new ArrayList<>();
datas.add(getLayoutInflater().inflate(R.layout.flash_one,null));
datas.add(getLayoutInflater().inflate(R.layout.flash_two,null));
datas.add(getLayoutInflater().inflate(R.layout.flash_three,null));

myViewPagerAdapter = new MyViewPagerAdapter(datas);
viewPager.setAdapter(myViewPagerAdapter);

3、PagerAdapter

public class MyViewPagerAdapter extends PagerAdapter {

private ArrayList<View> datas;

public MyViewPagerAdapter(ArrayList<View> datas) {
this.datas = datas;
}

@Override
public int getCount() {
return datas.size();
}

@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
View v  = datas.get(position);
container.addView(v);
return v;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(datas.get(position));

}
}