Android使用Retrofit2.0技術仿微信發說說

2019-12-12 04:02:03

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最近項目做完了，有閑暇時間，一直想做一個類似微信中微信發說說，既能實現拍照，選圖庫，多圖案上傳的案例，目前好多App都有類似微信朋友圈的功能，能過發表說說等附帶圖片上傳。下面的就是實現該功能的過程：大家還沒有看過Android Retrofit 2.0框架上傳圖片解決方案（一張與多張的處理）這篇文章，在看今天的就很容易，接在本項目中用到了一個library：photopicker，封裝了圖片的選擇功能，是否選相機，還有選中圖片后可以查看圖片的功能。

一、首先：將photopicker到工程中

（1）、先簡單講解一下PhotoPickerIntent的用法：

PhotoPickerIntent intent = new PhotoPickerIntent(MainActivity.this);   intent.setSelectModel(SelectModel.MULTI); //   intent.setShowCarema(true); // 是否顯示拍照   intent.setMaxTotal(6); // 最多選擇照片數量，默認為6   intent.setSelectedPaths(imagePaths); // 已選中的照片地址， 用于回顯選中狀態   startActivityForResult(intent, REQUEST_CAMERA_CODE);

（2）、設置好之后，重寫onActivityResult方法處理選中圖片和預覽加載適配器

@Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {  super.onActivityResult(requestCode, resultCode, data);  if(resultCode == RESULT_OK) {   switch (requestCode) {   // 選擇照片   case REQUEST_CAMERA_CODE:    loadAdpater(data.getStringArrayListExtra(PhotoPickerActivity.EXTRA_RESULT));    break;   // 預覽   case REQUEST_PREVIEW_CODE:    loadAdpater(data.getStringArrayListExtra(PhotoPreviewActivity.EXTRA_RESULT));    break;   }  }  }

二、重點在GridAdapter

1.在圖片路徑中默認添加一圖片，用來調用需選擇圖庫
imagePaths.add("000000");

2.根據路徑判斷選中的圖片。如果超過6張，默認路徑從集合中移除。

 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、上傳管理類

/**  * 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 {  /**   * 上傳一張圖片   * @param description   * @param imgs   * @return   */  @Multipart  @POST("/upload")  Call<String> uploadImage(@Part("fileName") String description,      @Part("file/"; filename=/"image.png/"") RequestBody imgs);    /**   * 上傳6張圖片   * @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);   /**   * 簡便寫法   * @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);    /**  * 發說說  * @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、項目代碼

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; // 相機拍照處理類   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); // 是否顯示拍照    intent.setMaxTotal(6); // 最多選擇照片數量，默認為6    intent.setSelectedPaths(imagePaths); // 已選中的照片地址， 用于回顯選中狀態    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) {   // 選擇照片   case REQUEST_CAMERA_CODE:    ArrayList<String> list = data.getStringArrayListExtra(PhotoPickerActivity.EXTRA_RESULT);    Log.d(TAG, "list: " + "list = [" + list.size());    loadAdpater(list);    break;   // 預覽   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 {    //拿到輸出流，同時重命名上傳的文件    FileOutputStream os = new FileOutputStream("f:/img"+"/" + new Date().getTime()+".jpg");    //拿到上傳文件的輸入流    FileInputStream in = (FileInputStream) files[i].getInputStream();       //以寫字節的方式寫文件    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("上傳出錯");   }  }  }  return "/success";  }

六、Struts2接收文件

public class UploadFile extends ActionSupport {   /**  *  */ private static final long serialVersionUID = 1L;  private File[] file;//文件數組 private String description;//說說內容 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("上傳的文件="+Arrays.toString(file));  System.out.println("說說內容="+description); } }

項目下載地址：https://github.com/lidong1665/Android-UploadMultipartImage

效果圖：