利用DrawerLayout和触摸事件分发实现抽屉侧滑效果

public class MainActivity extends AppCompatActivity implements  MyDraweLayout.GetPositionCallback {    private List<ImageView> imageList;    private ViewPager viewPager;    private MyAdapter adapter;    private MyDraweLayout myDraweLayout;    private int currentPosition;    @Override    protected void onCreate (Bundle savedInstanceState){    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    viewPager = (ViewPager) findViewById(R.id.viewpager);    myDraweLayout = (MyDraweLayout) findViewById(R.id.mydrawelayout);    initdata();    adapter = new MyAdapter(this, imageList);     myDraweLayout.setCallback(this);    viewPager.setAdapter(adapter);      viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {        @Override        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {        }        @Override        public void onPageSelected(int position) {          currentPosition=position;        }        @Override        public void onPageScrollStateChanged(int state) {        }      });  }  private void initdata() {    imageList = new ArrayList<ImageView>();    ImageView imageView = new ImageView(this);    imageView.setImageResource(R.mipmap.ic_launcher);    imageView.setScaleType(ImageView.ScaleType.FIT_XY);    imageList.add(imageView);    imageView = new ImageView(this);    imageView.setImageResource(R.mipmap.ic_launcher);    imageView.setScaleType(ImageView.ScaleType.FIT_XY);    imageList.add(imageView);    imageView = new ImageView(this);    imageView.setImageResource(R.mipmap.ic_launcher);    imageView.setScaleType(ImageView.ScaleType.FIT_XY);    imageList.add(imageView);    imageView = new ImageView(this);    imageView.setImageResource(R.mipmap.ic_launcher);    imageView.setScaleType(ImageView.ScaleType.FIT_XY);    imageList.add(imageView);  }  @Override  public int position() {    return currentPosition;//TODO 通过接口回调把当前位置传到MyDraweLayout中  }}