Android 仿照微信发说说，既能实现拍照，选图库，多图案上传 使用Retrofit2.0技术

package com.lidong.photopickersample;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageView;

import com.bumptech.glide.Glide;
import com.lidong.photopicker.ImageCaptureManager;
import com.lidong.photopicker.PhotoPickerActivity;
import com.lidong.photopicker.PhotoPreviewActivity;
import com.lidong.photopicker.SelectModel;
import com.lidong.photopicker.intent.PhotoPickerIntent;
import com.lidong.photopicker.intent.PhotoPreviewIntent;

import org.json.JSONArray;

import java.util.ArrayList;

/**
 * @
 * @author lidong
 * @date 2016-02-29
 */
public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_CAMERA_CODE = 10;
    private static final int REQUEST_PREVIEW_CODE = 20;
    private ArrayList<String> imagePaths = new ArrayList<>();
    private ImageCaptureManager captureManager; // 相机拍照处理类

    private GridView gridView;
    private GridAdapter gridAdapter;
    private Button mButton;
    private String depp;
    private EditText textView;
    private String TAG =MainActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView = (GridView) findViewById(R.id.gridView);
        mButton = (Button) findViewById(R.id.button);
        textView= (EditText)findViewById(R.id.et_context);

        int cols = getResources().getDisplayMetrics().widthPixels / getResources().getDisplayMetrics().densityDpi;
        cols = cols < 3 ? 3 : cols;
        gridView.setNumColumns(cols);

        // preview
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String imgs = (String) parent.getItemAtPosition(position);
                if ("000000".equals(imgs) ){
                    PhotoPickerIntent intent = new PhotoPickerIntent(MainActivity.this);
                    intent.setSelectModel(SelectModel.MULTI);
                    intent.setShowCarema(true); // 是否显示拍照
                    intent.setMaxTotal(6); // 最多选择照片数量，默认为6
                    intent.setSelectedPaths(imagePaths); // 已选中的照片地址， 用于回显选中状态
                    startActivityForResult(intent, REQUEST_CAMERA_CODE);
                }else{
                        PhotoPreviewIntent intent = new PhotoPreviewIntent(MainActivity.this);
                        intent.setCurrentItem(position);
                        intent.setPhotoPaths(imagePaths);
                        startActivityForResult(intent, REQUEST_PREVIEW_CODE);
                }
            }
        });
        imagePaths.add("000000");
        gridAdapter = new GridAdapter(imagePaths);
        gridView.setAdapter(gridAdapter);
        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                depp =textView.getText().toString().trim()!=null?textView.getText().toString().trim():"woowoeo";
                new Thread(){
                    @Override
                    public void run() {
                        super.run();
                        FileUploadManager.uploadMany(imagePaths, depp);
//                        FileUploadManager.upload(imagePaths,depp);
                    }
                }.start();
            }
        });
    }


    @Override
    protected void onResume() {
        super.onResume();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == RESULT_OK) {
            switch (requestCode) {
                // 选择照片
                case REQUEST_CAMERA_CODE:
                    ArrayList<String> list = data.getStringArrayListExtra(PhotoPickerActivity.EXTRA_RESULT);
                    Log.d(TAG, "list: " + "list = [" + list.size());
                    loadAdpater(list);
                    break;
                // 预览
                case REQUEST_PREVIEW_CODE:
                    ArrayList<String> ListExtra = data.getStringArrayListExtra(PhotoPreviewActivity.EXTRA_RESULT);
                    Log.d(TAG, "ListExtra: " + "ListExtra = [" + ListExtra.size());
                    loadAdpater(ListExtra);
                    break;
            }
        }
    }

    private void loadAdpater(ArrayList<String> paths){
        if (imagePaths!=null&& imagePaths.size()>0){
            imagePaths.clear();
        }
        if (paths.contains("000000")){
            paths.remove("000000");
        }
        paths.add("000000");
        imagePaths.addAll(paths);
        gridAdapter  = new GridAdapter(imagePaths);
        gridView.setAdapter(gridAdapter);
        try{
            JSONArray obj = new JSONArray(imagePaths);
            Log.e("--", obj.toString());
        }catch (Exception e){
            e.printStackTrace();
        }
    }

    private class GridAdapter extends BaseAdapter{
        private ArrayList<String> listUrls;
        private LayoutInflater inflater;
        public GridAdapter(ArrayList<String> listUrls) {
            this.listUrls = listUrls;
            if(listUrls.size() == 7){
                listUrls.remove(listUrls.size()-1);
            }
            inflater = LayoutInflater.from(MainActivity.this);
        }

        public int getCount(){
            return  listUrls.size();
        }
        @Override
        public String getItem(int position) {
            return listUrls.get(position);
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if (convertView == null) {
                holder = new ViewHolder();
                convertView = inflater.inflate(R.layout.item_image, parent,false);
                holder.image = (ImageView) convertView.findViewById(R.id.imageView);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder)convertView.getTag();
            }

            final String path=listUrls.get(position);
            if (path.equals("000000")){
                holder.image.setImageResource(R.mipmap.ic_launcher);
            }else {
                Glide.with(MainActivity.this)
                        .load(path)
                        .placeholder(R.mipmap.default_error)
                        .error(R.mipmap.default_error)
                        .centerCrop()
                        .crossFade()
                        .into(holder.image);
            }
            return convertView;
        }
          class ViewHolder {
             ImageView image;
        }
    }
}

<span style="font-size:18px;">@RequestMapping("/upload"   )  
    public String addUser(@RequestParam("file") CommonsMultipartFile[] files,
    		HttpServletRequest request){  
          
        for(int i = 0;i<files.length;i++){  
            System.out.println("fileName---------->" + files[i].getOriginalFilename());  
          
            if(!files[i].isEmpty()){  
                int pre = (int) System.currentTimeMillis();  
                try {  
                    //拿到输出流，同时重命名上传的文件  
                    FileOutputStream os = new FileOutputStream("f:/img"+"/" + new Date().getTime()+".jpg");  
                    //拿到上传文件的输入流  
                    FileInputStream in = (FileInputStream) files[i].getInputStream();  
                      
                    //以写字节的方式写文件  
                    int b = 0;  
                    while((b=in.read()) != -1){  
                        os.write(b);  
                    }  
                    os.flush();  
                    os.close();  
                    in.close();  
                    int finaltime = (int) System.currentTimeMillis();  
                    System.out.println(finaltime - pre);  
                      
                } catch (Exception e) {  
                    e.printStackTrace();  
                    System.out.println("上传出错");  
                }  
        }  
        }  
        return "/success";  
    }  </span>

<span style="font-size:18px;color:#ff6666;">@Controller 
public class UploadFile extends ActionSupport {

 /**
 * 
 */
private static final long serialVersionUID = 1L;

private File[] file;//文件数组
private String description;//说说内容
public File[] getFile() {
    return file;
}
public void setFile(File[] file) {
    this.file = file;
}


public String getDescription() {
    return description;
}
public void setDescription(String description) {
    this.description = description;
}
@Action("/upload")
public void upload()  {
    System.out.println("上传的文件="+Arrays.toString(file));
    System.out.println("说说内容="+description);
}
}</span>