Android使用Retrofit2.0技术仿微信发说说

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我们。