最近项目做完了，有闲暇时间，一直想做一个类似微信中微信发说说，既能实现拍照，选图库，多图案上传的案例，目前好多App都有类似微信朋友圈的功能，能过发表说说等附带图片上传。下面的就是实现该功能的过程：大家还没有看过Android Retrofit 2.0框架上传图片解决方案（一张与多张的处理）这篇文章，在看今天的就很容易，接在本项目中用到了一个library：photopicker，封装了图片的选择功能，是否选相机，还有选中图片后可以查看图片的功能。

一、 首先：将photopicker到工程中

（1）、先简单讲解一下PhotoPickerIntent的用法：

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);

（2）、设置好之后，重写onActivityResult方法处理选中图片和预览加载适配器

@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: loadAdpater(data.getStringArrayListExtra(PhotoPickerActivity.EXTRA_RESULT)); break; // 预览 case REQUEST_PREVIEW_CODE: loadAdpater(data.getStringArrayListExtra(PhotoPreviewActivity.EXTRA_RESULT)); break; } } }

二、重点在GridAdapter

1.在图片路径中默认添加一图片，用来调用需选择图库
imagePaths.add("000000");

2.根据路径判断选中的图片。如果超过6张，默认路径从集合中移除。

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; } } }

三、上传管理类

/** * Created by lidong on 2016/1/28. */ public class FileUploadManager { private static final String ENDPOINT = "http://192.168.1.21:8080"; private static String TAG = FileUploadManager.class.getSimpleName(); public interface FileUploadService { /** * 上传一张图片 * @param description * @param imgs * @return */ @Multipart @POST("/upload") Call<String> uploadImage(@Part("fileName") String description, @Part("file\"; filename=\"image.png\"") RequestBody imgs); /** * 上传6张图片 * @param description * @param imgs1 * @param imgs2 * @param imgs3 * @param imgs4 * @param imgs5 * @param imgs6 * @return */ @Multipart @POST("/upload") Call<String> uploadImage(@Part("description") String description, @Part("file\"; filename=\"image.png\"") RequestBody imgs1, @Part("file\"; filename=\"image.png\"") RequestBody imgs2, @Part("file\"; filename=\"image.png\"") RequestBody imgs3, @Part("file\"; filename=\"image.png\"") RequestBody imgs4, @Part("file\"; filename=\"image.png\"") RequestBody imgs5, @Part("file\"; filename=\"image.png\"") RequestBody imgs6); /** * 简便写法 * @param description * @param imgs1 * @return */ @Multipart @POST("/upload") Call<String> uploadImage(@Part("description") String description,@PartMap Map<String, RequestBody> imgs1); } private static final Retrofit sRetrofit = new Retrofit .Builder() .baseUrl(ENDPOINT) .addConverterFactory(GsonConverterFactory.create()) .build(); private static final FileUploadService apiManager = sRetrofit.create(FileUploadService.class); /** * 发说说 * @param paths * @param desp */ public static void upload(ArrayList<String> paths,String desp){ RequestBody[] requestBody= new RequestBody[6]; if (paths.size()>0) { for (int i=0;i<paths.size();i++) { requestBody[i] = RequestBody.create(MediaType.parse("multipart/form-data"), new File(paths.get(i))); } } Call<String> call = apiManager.uploadImage( desp,requestBody[0],requestBody[1],requestBody[2],requestBody[3],requestBody[4],requestBody [5]); call.enqueue(new Callback<String>() { @Override public void onResponse(Call<String> call, Response<String> response) { Log.d(TAG, "onResponse() called with: " + "call = [" + call + "], response = [" + response + "]"); } @Override public void onFailure(Call<String> call, Throwable t) { Log.d(TAG, "onFailure() called with: " + "call = [" + call + "], t = [" + t + "]"); } }); }<pre name="code" class="java"> /** * * @param paths * @param desp */ public static void uploadMany(ArrayList<String> paths,String desp){ Map<String,RequestBody> photos = new HashMap<>(); if (paths.size()>0) { for (int i=0;i<paths.size();i++) { String substring = paths.get(i).substring(paths.get(i).lastIndexOf("/") + 1, paths.get(i).length()); photos.put("file\"; filename="+substring, RequestBody.create(MediaType.parse("multipart/form-data"), new File(paths.get(i)))); } } Call<String> stringCall = apiManager.uploadImage(desp, photos); stringCall.enqueue(new Callback<String>() { @Override public void onResponse(Call<String> call, Response<String> response) { Log.d(TAG, "onResponse() called with: " + "call = [" + call + "], response = [" + response + "]"); } @Override public void onFailure(Call<String> call, Throwable t) { Log.d(TAG, "onFailure() called with: " + "call = [" + call + "], t = [" + t + "]"); } }); }

四、项目代码

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; } } }

五、SpringMVC接收文件的action

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"; }

六、Struts2接收文件

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); } }

项目下载地址：https://github.com/lidong1665/Android-UploadMultipartImage

效果图：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。