viewpager+photoview实现图片查看器

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:background="#000000">   <android.support.v4.view.ViewPager  android:id="@+id/viewpager"  android:layout_width="match_parent"  android:layout_height="match_parent" />   <TextView  android:id="@+id/tv_num"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_centerHorizontal="true"  android:textColor="#ffffff"  android:textSize="30sp" />  </RelativeLayout> 

/**  * Created by zheng on 2017/11/27.  */  public class PhotoFragment extends Fragment {   private String url;  private PhotoView mPhotoView;   /**  * 获取这个fragment需要展示图片的url  * @param url  * @return  */  public static PhotoFragment newInstance(String url) {  PhotoFragment fragment = new PhotoFragment();  Bundle args = new Bundle();  args.putString("url", url);  fragment.setArguments(args);  return fragment;  }   @Override  public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  url = getArguments().getString("url");  }   @Nullable  @Override  public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {  View view = inflater.inflate(R.layout.fragment_img, container, false);  mPhotoView = view.findViewById(R.id.photoview);  //设置缩放类型，默认ScaleType.CENTER（可以不设置）  mPhotoView.setScaleType(ImageView.ScaleType.CENTER);  mPhotoView.setOnLongClickListener(new View.OnLongClickListener() {   @Override   public boolean onLongClick(View view) {   ToastUtils.showToast(getContext(),"长按事件");   return true;   }  });  mPhotoView.setOnPhotoTapListener(new PhotoViewAttacher.OnPhotoTapListener() {   @Override   public void onPhotoTap(View view, float x, float y) {   ToastUtils.showToast(getContext(),"点击事件，真实项目中可关闭activity");   }  });  Glide.with(getContext())   .load(url)   .placeholder(R.mipmap.ic_launcher)//加载过程中图片未显示时显示的本地图片   .error(R.mipmap.ic_launcher)//加载异常时显示的图片 //  .centerCrop()//图片图填充ImageView设置的大小   .fitCenter()//缩放图像测量出来等于或小于ImageView的边界范围,该图像将会完全显示   .into(mPhotoView);  return view;  }  } 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent">   <uk.co.senab.photoview.PhotoView  android:id="@+id/photoview"  android:layout_width="match_parent"  android:layout_height="match_parent" />  </RelativeLayout> 

allprojects {  repositories {  maven { url "https://jitpack.io" }  } } 

dependencies {  compile 'com.github.chrisbanes.photoview:library:+'  compile 'com.github.bumptech.glide:glide:3.7.0' }