使用photoview+viewpager实现图片缩放切换(类似微信朋友圈图片查看)

本文主要是介绍使用photoview+viewpager实现图片缩放切换(类似微信朋友圈图片查看),希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!

首先看一下最终效果


经过分析可知,整个页面布局应该是一个Listview,它的每一个条目item中包含原型头像(采用CircleImageVIew)一个数目可变的GridView和其他,Gridview不可滚动,图片查看可缩放使用photoview,图片切换使用viewpager,思路清晰之后,开始写。。。

导入依赖库:

compile 'com.google.code.gson:gson:2.2.4'
compile files('libs/circleimageview.jar')
compile files('libs/universal-image-loader-1.9.1.jar')

导入photoview源码https://github.com/chrisbanes/PhotoView

初始化ImageLoader

public class MyApplication extends Application {@Override
   public void onCreate() {super.onCreate();
      DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder().showImageForEmptyUri(R.drawable.empty_photo) .showImageOnFail(R.drawable.empty_photo) .cacheInMemory(true).cacheOnDisc(true).build();
      ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext()).defaultDisplayImageOptions(defaultOptions).discCacheSize(50 * 1024 * 1024)//
            .discCacheFileCount(100)//缓存一百张图片
            .writeDebugLogs().build();
      ImageLoader.getInstance().init(config);
   }
}
清单文件中修改


1.MainActivity

public class MainActivity extends ListActivity {public static final String TAG = "MainActivity";
   private ListAdapter mAdapter;

   @Override
   public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);

      //开启异步任务去模拟获取数据
      new LoderDataTask().execute();

   }class LoderDataTask extends AsyncTask<Void, Void, MessageModle> {@Override
      protected MessageModle doInBackground(Void... params) {Gson gson = new Gson();

         MessageModle msg = gson.fromJson(getData(), MessageModle.class);
         return msg;
      }@Override
      protected void onPostExecute(MessageModle result) {mAdapter = new ListAdapter(MainActivity.this, result.list);
         setListAdapter(mAdapter);

      }}private String getData() {// 模拟网络获取数据
      String json = "{\"code\":200,\"msg\":\"ok\",list:["
            + "{\"id\":110,\"avator\":\"http://img0.bdstatic.com/img/image/shouye/leimu/mingxing.jpg\",\"name\":\"赵薇\",\"content\":\"今天不开心!\",\"urls\":[]},"
            + "{\"id\":111,\"avator\":\"http://image.cnwest.com/attachement/jpg/site1/20110507/001372d8a36f0f2f4c953a.jpg\",\"name\":\"李晨\",\"content\":\"我们\","
            + "  \"urls\":[\"http://guangdong.sinaimg.cn/2015/0530/U11307P693DT20150530094310.jpg\"]},"

            + "{\"id\":114,\"avator\":\"http://img.hexun.com/2009-05-01/117287830.jpg\",\"name\":\"小马哥\",\"content\":\"今天淘宝了吗\",\"urls\":["
            + "\"http://g.hiphotos.bdimg.com/album/s%3D680%3Bq%3D90/sign=ccd33b46d53f8794d7ff4b26e2207fc9/0d338744ebf81a4c0f993437d62a6059242da6a1.jpg\","
            
            + "\"http://f.hiphotos.bdimg.com/album/s%3D680%3Bq%3D90/sign=6b62f61bac6eddc422e7b7f309e0c7c0/6159252dd42a2834510deef55ab5c9ea14cebfa1.jpg\","
            + "\"http://g.hiphotos.bdimg.com/album/s%3D680%3Bq%3D90/sign=e58fb67bc8ea15ce45eee301863b4bce/a5c27d1ed21b0ef4fd6140a0dcc451da80cb3e47.jpg\","
            + "\"http://c.hiphotos.bdimg.com/album/s%3D680%3Bq%3D90/sign=cdab1512d000baa1be2c44b3772bc82f/91529822720e0cf3855c96050b46f21fbf09aaa1.jpg\"]},"
            
            + "{\"id\":112,\"avator\":\"http://img3.yxlady.com/yl/UploadFiles_5361/20150528/20150528050208705.jpg\",\"name\":\"邓超\",\"content\":\"奔跑吧兄弟! 欢迎收看!\",\"urls\":[\"http://upload.cbg.cn/2015/0305/1425518659246.jpg\","
            + "\"http://www.people.com.cn/mediafile/pic/20150619/30/4179219540177204330.jpg\"]},"
            
            + "{\"id\":113,\"avator\":\"http://img4.imgtn.bdimg.com/it/u=945108765,1070109457&fm=21&gp=0.jpg\",\"name\":\"奥巴马\",\"content\":\"holle\",\"urls\":[\"http://f.hiphotos.bdimg.com/album/s%3D680%3Bq%3D90/sign=6b62f61bac6eddc422e7b7f309e0c7c0/6159252dd42a2834510deef55ab5c9ea14cebfa1.jpg\",\"http://g.hiphotos.bdimg.com/album/s%3D680%3Bq%3D90/sign=e58fb67bc8ea15ce45eee301863b4bce/a5c27d1ed21b0ef4fd6140a0dcc451da80cb3e47.jpg\",\"http://c.hiphotos.bdimg.com/album/s%3D680%3Bq%3D90/sign=cdab1512d000baa1be2c44b3772bc82f/91529822720e0cf3855c96050b46f21fbf09aaa1.jpg\"]}]}";

      return json;
   }
}

bean类

public class MessageModle {public int code;
   public String msg;
   
   public ArrayList<InfoBean> list;

   @Override
   public String toString() {return "MyMessage [code=" + code + ", msg=" + msg + ", list=" + list + "]";
   }}
public class InfoBean {public int id;
   public String avator;
   public String name;
   public String content;
   public String time;
   public String[] urls;

   

}
布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="6dp" >

    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@android:id/empty"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="暂无数据" />

</RelativeLayout>

2.ListAdapter

public class ListAdapter extends BaseAdapter{private ArrayList<InfoBean> mList;
   private LayoutInflater mInflater;
   private Context mContext;
   
   public ListAdapter(Context context, ArrayList<InfoBean> list) {mInflater = LayoutInflater.from(context);
      mContext=context;
      this.mList=list;
   }@Override
   public int getCount() {return mList==null?0:mList.size();
   }@Override
   public InfoBean getItem(int position) {return mList.get(position);
   }@Override
   public long getItemId(int position) {return getItem(position).id;
   }@Override
   public View getView(int position, View convertView, ViewGroup parent) {ViewHolder holder;
      if (convertView == null) {holder = new ViewHolder();
         convertView = mInflater.inflate(R.layout.list_item, null);
         holder.avator=(ImageView)convertView.findViewById(R.id.avator);
         holder.name=(TextView)convertView.findViewById(R.id.name);
         holder.content = (TextView) convertView.findViewById(R.id.content);
         holder.gridView=(NoScrollGridView)convertView.findViewById(R.id.gridView);
         convertView.setTag(holder);
      } else {holder = (ViewHolder) convertView.getTag();
      }final InfoBean bean = getItem(position);
      //加载网络图片
      ImageLoader.getInstance().displayImage(bean.avator, holder.avator);
      holder.name.setText(bean.name);
      holder.content.setText(bean.content);
      if(bean.urls!=null&&bean.urls.length>0){holder.gridView.setVisibility(View.VISIBLE);
         holder.gridView.setAdapter(new DynamicGridAdapter(bean.urls, mContext));
         holder.gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {imageBrower(position,bean.urls);
            }});
      }else{holder.gridView.setVisibility(View.GONE);
      }return convertView;
   }private void imageBrower(int position, String[] urls) {Intent intent = new Intent(mContext, ImagePagerActivity.class);
      // 图片url,为了演示这里使用常量,一般从数据库中或网络中获取
      intent.putExtra(ImagePagerActivity.EXTRA_IMAGE_URLS, urls);
      intent.putExtra(ImagePagerActivity.EXTRA_IMAGE_INDEX, position);
      mContext.startActivity(intent);
   }// 优化listview
   private static class ViewHolder {public TextView name;
      public ImageView avator;
      TextView content;
      NoScrollGridView gridView;
   }
}

DynamicGridAdapter

public class DynamicGridAdapter extends BaseAdapter {private String[] files;

   private LayoutInflater mLayoutInflater;

   public DynamicGridAdapter(String[] files, Context context) {this.files = files;
      mLayoutInflater = LayoutInflater.from(context);
   }@Override
   public int getCount() {return files == null ? 0 : files.length;
   }@Override
   public String getItem(int position) {return files[position];
   }@Override
   public long getItemId(int position) {return position;
   }@Override
   public View getView(int position, View convertView, ViewGroup parent) {MyGridViewHolder viewHolder;
      if (convertView == null) {viewHolder = new MyGridViewHolder();
         convertView = mLayoutInflater.inflate(R.layout.gridview_item,
               parent, false);
         
         viewHolder.imageView = (ImageView) convertView.findViewById(R.id.album_image);
         convertView.setTag(viewHolder);
      } else {viewHolder = (MyGridViewHolder) convertView.getTag();
      }String url = getItem(position);
      if (getCount() == 1) {viewHolder.imageView.setLayoutParams(new android.widget.AbsListView.LayoutParams(300, 250));
      }if (getCount() == 2 ||getCount() == 4) {viewHolder.imageView.setLayoutParams(new android.widget.AbsListView.LayoutParams(200, 200));
      }ImageLoader.getInstance().displayImage(url, viewHolder.imageView);

      return convertView;
   }private static class MyGridViewHolder {ImageView imageView;
   }
}

布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="6dp" >

    <de.hdodenhof.circleimageview.CircleImageView
        android:id="@+id/avator"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:src="@drawable/empty_photo" />

    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_toRightOf="@id/avator"
        android:textColor="#576B95"
        android:textSize="16sp"
        android:text="name" />

    <TextView
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/name"
        android:layout_marginLeft="10dp"
        android:textSize="12sp"
        android:layout_toRightOf="@id/avator"
        android:text="content" />

    <com.xxx.demo.image.NoScrollGridView
        
        android:id="@+id/gridView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingTop="5dp"
        android:layout_below="@id/content"
        android:layout_marginLeft="10dp"
        android:layout_toRightOf="@id/avator"
        android:horizontalSpacing="1dp"
        android:numColumns="3"
        
        android:visibility="gone"
        android:verticalSpacing="1dp" />

</RelativeLayout>

3.自定义无滚动的GridView

public class NoScrollGridView extends GridView {public NoScrollGridView(Context context) {super(context);
   }public NoScrollGridView(Context context, AttributeSet attrs) {super(context, attrs);
   }@Override
   protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int  expandSpec = 0;
       int  size = getAdapter().getCount();
       
      if (size == 1) {setNumColumns(1);
      } if ( size==2 || size == 4  ) {setNumColumns(2);
      }else {setNumColumns(3);
      }expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,MeasureSpec.AT_MOST);
      super.onMeasure(widthMeasureSpec,expandSpec);
   }}

4.图片查看Activiy

public class ImagePagerActivity extends FragmentActivity {private static final String STATE_POSITION = "STATE_POSITION";
   public static final String EXTRA_IMAGE_INDEX = "image_index";
   public static final String EXTRA_IMAGE_URLS = "image_urls";

   private HackyViewPager mPager;
   private int pagerPosition;
   private TextView indicator;

   @Override
   public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);
      setContentView(R.layout.image_detail_pager);

      pagerPosition = getIntent().getIntExtra(EXTRA_IMAGE_INDEX, 0);
      String[] urls = getIntent().getStringArrayExtra(EXTRA_IMAGE_URLS);


      mPager = (HackyViewPager) findViewById(R.id.pager);
      ImagePagerAdapter mAdapter = new ImagePagerAdapter(getSupportFragmentManager(), urls);
      mPager.setAdapter(mAdapter);
      indicator = (TextView) findViewById(R.id.indicator);

      CharSequence text = getString(R.string.viewpager_indicator, 1, mPager
            .getAdapter().getCount());
      indicator.setText(text);
      // 更新下标
      mPager.setOnPageChangeListener(new OnPageChangeListener() {@Override
         public void onPageScrollStateChanged(int arg0) {}@Override
         public void onPageScrolled(int arg0, float arg1, int arg2) {}@Override
         public void onPageSelected(int arg0) {CharSequence text = getString(R.string.viewpager_indicator,
                  arg0 + 1, mPager.getAdapter().getCount());
            indicator.setText(text);
         }});
      if (savedInstanceState != null) {pagerPosition = savedInstanceState.getInt(STATE_POSITION);
      }mPager.setCurrentItem(pagerPosition);
   }@Override
   public void onSaveInstanceState(Bundle outState) {outState.putInt(STATE_POSITION, mPager.getCurrentItem());
   }private class ImagePagerAdapter extends FragmentStatePagerAdapter {public String[] fileList;

      public ImagePagerAdapter(FragmentManager fm, String[] fileList) {super(fm);
         this.fileList = fileList;
      }@Override
      public int getCount() {return fileList == null ? 0 : fileList.length;
      }@Override
      public Fragment getItem(int position) {String url = fileList[position];
         return ImageDetailFragment.newInstance(url);
      }}
}

viewpager

public class HackyViewPager extends ViewPager {private static final String TAG = "HackyViewPager";

   public HackyViewPager(Context context) {super(context);
   }public HackyViewPager(Context context, AttributeSet attrs) {super(context, attrs);
   }@Override
   public boolean onInterceptTouchEvent(MotionEvent ev) {try {return super.onInterceptTouchEvent(ev);
      } catch (IllegalArgumentException e) {return false;
      }catch(ArrayIndexOutOfBoundsException e ){return false;
      }}}
布局文件

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <com.xxx.demo.image.HackyViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/black" />

    <TextView
        android:id="@+id/indicator"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:gravity="center"
        android:textSize="18sp"
        android:textColor="@android:color/white"
        android:text="@string/viewpager_indicator"
        android:background="@android:color/transparent" />

</FrameLayout>

5.图片显示Fragment

public class ImageDetailFragment extends Fragment {private String mImageUrl;
   private ImageView mImageView;
   private ProgressBar progressBar;
   private PhotoViewAttacher mAttacher;

   public static ImageDetailFragment newInstance(String imageUrl) {final ImageDetailFragment f = new ImageDetailFragment();

      final Bundle args = new Bundle();
      args.putString("url", imageUrl);
      f.setArguments(args);

      return f;
   }@Override
   public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);
      mImageUrl = getArguments() != null ? getArguments().getString("url") : null;

   }@Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {final View v = inflater.inflate(R.layout.image_detail_fragment, container, false);
      mImageView = (ImageView) v.findViewById(R.id.image);
      mAttacher = new PhotoViewAttacher(mImageView);
      
      mAttacher.setOnPhotoTapListener(new OnPhotoTapListener() {//点击图片关闭当前activiy
         @Override
         public void onPhotoTap(View arg0, float arg1, float arg2) {getActivity().finish();
         }});
      
      progressBar = (ProgressBar) v.findViewById(R.id.loading);
      return v;
   }@Override
   public void onActivityCreated(Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);
      
      
      ImageLoader.getInstance().displayImage(mImageUrl, mImageView, new SimpleImageLoadingListener() {@Override
         public void onLoadingStarted(String imageUri, View view) {progressBar.setVisibility(View.VISIBLE);
         }@Override
         public void onLoadingFailed(String imageUri, View view, FailReason failReason) {String message = null;
            switch (failReason.getType()) {case IO_ERROR:message = "下载错误";
               break;
            case DECODING_ERROR:message = "图片无法显示";
               break;
            case NETWORK_DENIED:message = "网络有问题,无法下载";
               break;
            case OUT_OF_MEMORY:message = "图片太大无法显示";
               break;
            case UNKNOWN:message = "未知的错误";
               break;
            }Toast.makeText(getActivity(), message, Toast.LENGTH_SHORT).show();
            progressBar.setVisibility(View.GONE);
         }@Override
         public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {progressBar.setVisibility(View.GONE);
            mAttacher.update();
         }});
      
   }}
布局文件

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:background="@color/black"
    android:layout_height="match_parent" >

    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true"
        android:contentDescription="@string/app_name"
        android:scaleType="centerCrop" />

    <ProgressBar
        android:id="@+id/loading"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:visibility="gone" />

</FrameLayout>

这篇关于使用photoview+viewpager实现图片缩放切换(类似微信朋友圈图片查看)的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!



http://www.chinasem.cn/article/872017

相关文章

基于Python实现一个图片拆分工具

《基于Python实现一个图片拆分工具》这篇文章主要为大家详细介绍了如何基于Python实现一个图片拆分工具,可以根据需要的行数和列数进行拆分,感兴趣的小伙伴可以跟随小编一起学习一下... 简单介绍先自己选择输入的图片,默认是输出到项目文件夹中,可以自己选择其他的文件夹,选择需要拆分的行数和列数,可以通过

Python中将嵌套列表扁平化的多种实现方法

《Python中将嵌套列表扁平化的多种实现方法》在Python编程中,我们常常会遇到需要将嵌套列表(即列表中包含列表)转换为一个一维的扁平列表的需求,本文将给大家介绍了多种实现这一目标的方法,需要的朋... 目录python中将嵌套列表扁平化的方法技术背景实现步骤1. 使用嵌套列表推导式2. 使用itert

使用Docker构建Python Flask程序的详细教程

《使用Docker构建PythonFlask程序的详细教程》在当今的软件开发领域,容器化技术正变得越来越流行,而Docker无疑是其中的佼佼者,本文我们就来聊聊如何使用Docker构建一个简单的Py... 目录引言一、准备工作二、创建 Flask 应用程序三、创建 dockerfile四、构建 Docker

Python使用vllm处理多模态数据的预处理技巧

《Python使用vllm处理多模态数据的预处理技巧》本文深入探讨了在Python环境下使用vLLM处理多模态数据的预处理技巧,我们将从基础概念出发,详细讲解文本、图像、音频等多模态数据的预处理方法,... 目录1. 背景介绍1.1 目的和范围1.2 预期读者1.3 文档结构概述1.4 术语表1.4.1 核

Python使用pip工具实现包自动更新的多种方法

《Python使用pip工具实现包自动更新的多种方法》本文深入探讨了使用Python的pip工具实现包自动更新的各种方法和技术,我们将从基础概念开始,逐步介绍手动更新方法、自动化脚本编写、结合CI/C... 目录1. 背景介绍1.1 目的和范围1.2 预期读者1.3 文档结构概述1.4 术语表1.4.1 核

在Linux中改变echo输出颜色的实现方法

《在Linux中改变echo输出颜色的实现方法》在Linux系统的命令行环境下,为了使输出信息更加清晰、突出,便于用户快速识别和区分不同类型的信息,常常需要改变echo命令的输出颜色,所以本文给大家介... 目python录在linux中改变echo输出颜色的方法技术背景实现步骤使用ANSI转义码使用tpu

Conda与Python venv虚拟环境的区别与使用方法详解

《Conda与Pythonvenv虚拟环境的区别与使用方法详解》随着Python社区的成长,虚拟环境的概念和技术也在不断发展,:本文主要介绍Conda与Pythonvenv虚拟环境的区别与使用... 目录前言一、Conda 与 python venv 的核心区别1. Conda 的特点2. Python v

Spring Boot中WebSocket常用使用方法详解

《SpringBoot中WebSocket常用使用方法详解》本文从WebSocket的基础概念出发,详细介绍了SpringBoot集成WebSocket的步骤,并重点讲解了常用的使用方法,包括简单消... 目录一、WebSocket基础概念1.1 什么是WebSocket1.2 WebSocket与HTTP

C#中Guid类使用小结

《C#中Guid类使用小结》本文主要介绍了C#中Guid类用于生成和操作128位的唯一标识符,用于数据库主键及分布式系统,支持通过NewGuid、Parse等方法生成,感兴趣的可以了解一下... 目录前言一、什么是 Guid二、生成 Guid1. 使用 Guid.NewGuid() 方法2. 从字符串创建

Python使用python-can实现合并BLF文件

《Python使用python-can实现合并BLF文件》python-can库是Python生态中专注于CAN总线通信与数据处理的强大工具,本文将使用python-can为BLF文件合并提供高效灵活... 目录一、python-can 库:CAN 数据处理的利器二、BLF 文件合并核心代码解析1. 基础合