Android仿微信发朋友圈浏览图片效果

先看一下效果吧：

下面就来说一下具体怎么实现的：

实现思路

• 1.首先我们要获取数据源，数据源就是我们的每条说说（包括姓名、标题、图片数组）
• 2.自定义适配器（ListView嵌套着GridView）
• 3.图片点击浏览图片（Fragment+ViewPager）

具体实现

1.初始化数据源，设置适配器，看一下代码：

public class MyActivity extends Activity {
  /*图片显示列表*/
  private ListView listView;
  /*图片URL数组*/
  private List<ContentBean> contentBeans;
  /*说说适配器*/
  private MyAdapter adapter;

  /**
   * Called when the activity is first created.
   */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    initData();
    initViews();
  }

  /**
   * 初始化数据
   */
  private void initData(){
    contentBeans = new ArrayList<ContentBean>();
    ArrayList<String> imgUrls1 = new ArrayList<String>();
    imgUrls1.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    ContentBean cb1 = new ContentBean(1,"java","Sun Microsystems",imgUrls1);
    contentBeans.add(cb1);

    ArrayList<String> imgUrls2 = new ArrayList<String>();
    imgUrls2.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls2.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls2.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    ContentBean cb2 = new ContentBean(2,"OC","Stepstone",imgUrls2);
    contentBeans.add(cb2);

    ArrayList<String> imgUrls3 = new ArrayList<String>();
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    imgUrls3.add("http://7xojuc.com1.z0.glb.clouddn.com/110H2E40-6.jpg?attname=&e=1448288962&token=KDsCqUAWz3P-YT6In6oPnT56Eh2cig4zgQd12SJ_:AlTjfYD9SBFOdB4jmmZuKXAMOp8");
    ContentBean cb3 = new ContentBean(3,"python","Guido van Rossum",imgUrls3);
    contentBeans.add(cb3);
  }

  private void initViews(){
    listView = (ListView) findViewById(R.id.lv_my);
    adapter = new MyAdapter(MyActivity.this,contentBeans);
    listView.setAdapter(adapter);
  }
}

这里面的图片是我上传到七牛的网络图片，加载图片是用ImageLoader,下面也有具体的ImageLoader配置。
2.看一下适配器内容
在说说列表适配器中去设置图片的适配器，图片的GridView是重写了一个不能滑动的GridView，重写一下OnMeasure();

public class MyAdapter extends BaseAdapter {

  private Context context;
  private List<ContentBean> data;

  public MyAdapter(Context context, List<ContentBean> data) {
    this.context = context;
    this.data = data;
  }

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

  @Override
  public Object getItem(int i) {
    return data.get(i);
  }

  @Override
  public long getItemId(int i) {
    return i;
  }

  @Override
  public View getView(int i, View view, ViewGroup viewGroup) {
    ViewHolder holder;
    if (view == null) {
      holder = new ViewHolder();
      view = View.inflate(context, R.layout.item, null);
      holder.gridView = (NoScrollGridView) view.findViewById(R.id.gridview);
      holder.tvName = (TextView) view.findViewById(R.id.tv_name);
      holder.tvTitle = (TextView) view.findViewById(R.id.tv_title);
      view.setTag(holder);
    } else {
      holder = (ViewHolder) view.getTag();
    }

    final ContentBean bean = data.get(i);

    holder.tvName.setText(bean.getName());
    holder.tvTitle.setText(bean.getTitle());

    if (data != null && data.size() > 0) {
      holder.gridView.setAdapter(new ImageGridAdapter(context, bean.getImgUrls()));
    }
    /**
     * 图片列表点击事件
     */
    holder.gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
        Intent intent = new Intent(context, ImagePagerActivity.class);
        intent.putExtra(ImagePagerActivity.EXTRA_IMAGE_URLS, (Serializable) bean.getImgUrls());
        intent.putExtra(ImagePagerActivity.EXTRA_IMAGE_INDEX, i);
        context.startActivity(intent);
      }
    });

    return view;
  }

  class ViewHolder {
    TextView tvName, tvTitle;
    NoScrollGridView gridView;
  }
}

3.然后就是图片浏览，这个网上也有好多的Demo，也有详细的讲解，直接拽过来用就可以了，下面的图片数量是监听setOnPageChangeListener（）来改变下面的图片索引值

/**
 * 图片查看器
 */
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);
    ArrayList<String> urls = getIntent().getStringArrayListExtra(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 ArrayList<String> fileList;

    public ImagePagerAdapter(FragmentManager fm, ArrayList<String> fileList) {
      super(fm);
      this.fileList = fileList;
    }

    @Override
    public int getCount() {
      return fileList == null ? 0 : fileList.size();
    }

    @Override
    public Fragment getItem(int position) {
      String url = fileList.get(position);
      return ImageDetailFragment.newInstance(url);
    }

  }
}

图片Fragment的详细界面，里面有长按点击事件，和图片加载的状态

package com.hankkin.WeiXinLookImgsDemo.activty;

import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.hankkin.WeiXinLookImgsDemo.R;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;
import com.others.PhotoViewAttacher;

/**
 * 单张图片显示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 PhotoViewAttacher.OnPhotoTapListener() {

      @Override
      public void onPhotoTap(View arg0, float arg1, float arg2) {
        getActivity().finish();
      }
    });
    mAttacher.setOnLongClickListener(new View.OnLongClickListener() {
      @Override
      public boolean onLongClick(View view) {
        Toast.makeText(getActivity().getApplicationContext(),"保存",Toast.LENGTH_SHORT).show();
        return false;
      }
    });
    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();
      }
    });
  }
}

忘了ImageLoader的初始化工作了，给大家加上吧，我写到Application里了。

private MyApplication context;

  @Override
  public void onCreate() {
    super.onCreate();
    context = this;
    initImageLoader(context);
  }

  /**
   * 初始化Imageloader
   * by Hankkin at:2015-11-22 23:20:29
   * @param context
   */
  public static void initImageLoader(Context context){
    DisplayImageOptions options = new DisplayImageOptions.Builder()
        .showImageOnLoading(R.drawable.ic_launcher)
        .showImageOnFail(R.drawable.ic_launcher)
        .resetViewBeforeLoading(false) // default
        .delayBeforeLoading(0)
        .cacheInMemory(true) // default
        .cacheOnDisk(true) // default
        .considerExifParams(true) // default
        .imageScaleType(ImageScaleType.IN_SAMPLE_POWER_OF_2) // default
        .bitmapConfig(Bitmap.Config.ARGB_8888) // default
        .displayer(new SimpleBitmapDisplayer()) // default
        .handler(new Handler()) // default
        .build();
    File picPath = new File(Environment.getExternalStorageDirectory().getPath() + File.separator + "weixinlookimgdemo" + File.separator + "files");

    ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context)
        .memoryCacheExtraOptions(480, 800) // default = device screen dimensions
        .diskCacheExtraOptions(480, 800, null)
        .threadPoolSize(3) // default
        .threadPriority(Thread.NORM_PRIORITY - 1) // default
        .tasksProcessingOrder(QueueProcessingType.FIFO) // default
        .denyCacheImageMultipleSizesInMemory()
        .memoryCache(new LruMemoryCache(2 * 1024 * 1024))
        .memoryCacheSize(2 * 1024 * 1024)
        .memoryCacheSizePercentage(13) // default
        .diskCache(new UnlimitedDiscCache(picPath)) // default
        .diskCacheSize(50 * 1024 * 1024)
        .diskCacheFileCount(1000)
        .diskCacheFileNameGenerator(new HashCodeFileNameGenerator()) // default
        .imageDownloader(new BaseImageDownloader(context)) // default
        .imageDecoder(new BaseImageDecoder(true)) // default
        .defaultDisplayImageOptions(options) // default
        .writeDebugLogs()
        .build();
    // Initialize ImageLoader with configuration.
    ImageLoader.getInstance().init(config);
  }

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