Android仿微信发表说说实现拍照、多图上传功能

本文实例为大家分享了Android仿微信发表说说、心情功能，供大家参考，具体内容如下

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)、定义一个变量 mMaxPosition，
 (2)、写一个获取最大位置的方法：用来获取item的最大位置。

 //重点在这里，当position==mMaxposition-1让"+"选择图片的默认图片显示。 
 //当目前最多6中图片，则最大7时，图片影藏。 
 if (position==mMaxPosition-1) { 
 holder.image.setImageResource(R.mipmap.ic_launcher); 
 holder.image.setVisibility(View.VISIBLE); 
 if(position==6&&mMaxPosition==7){ 
 holder.image.setImageResource(R.mipmap.ic_launcher); 
 holder.image.setVisibility(View.GONE); 
 } 
 } else { 
 final String path=listUrls.get(position); 
 Glide.with(MainActivity.this) 
 .load(new File(path)) 
 .placeholder(R.mipmap.default_error) 
 .error(R.mipmap.default_error) 
 .centerCrop() 
 .crossFade() 
 .into(holder.image); 
} 

（3）、关于图片的显示：

 private class GridAdapter extends BaseAdapter{ 
 private ArrayList<String> listUrls; 
 private int mMaxPosition; 
 private LayoutInflater inflater; 
 public GridAdapter(ArrayList<String> listUrls) { 
 this.listUrls = listUrls; 
 inflater = LayoutInflater.from(MainActivity.this); 
 } 
 public int getCount() { 
 mMaxPosition = listUrls.size()+1; 
 return mMaxPosition; 
 } 
 public int getMaxPosition(){ 
 return mMaxPosition; 
 } 
 @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(); 
 } 
 Log.d("", "position:"+position+" mMaxPosition:"+mMaxPosition); 
 //重点在这里，当position==mMaxposition-1让"+"选择图片的默认图片显示。 
 //当目前最多6中图片，则最大7时，图片影藏。 
 if (position==mMaxPosition-1) { 
// holder.image.setTag("default"); 
 holder.image.setImageResource(R.mipmap.ic_launcher); 
 holder.image.setVisibility(View.VISIBLE); 
 if(position==6&&mMaxPosition==7){ 
  holder.image.setImageResource(R.mipmap.ic_launcher); 
  holder.image.setVisibility(View.GONE); 
 } 
 } else { 
 final String path=listUrls.get(position); 
 Glide.with(MainActivity.this) 
  .load(new File(path)) 
  .placeholder(R.mipmap.default_error) 
  .error(R.mipmap.default_error) 
  .centerCrop() 
  .crossFade() 
  .into(holder.image); 
 } 

三、GridView中Item的点击事件

gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
 @Override 
 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
  if (position == gridAdapter.getMaxPosition() - 1) { 
  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9 
  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); 
  } 
 } 
 }); 

整体源码：

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.io.File; 
import java.util.ArrayList; 
 
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 int columnWidth; 
 private GridAdapter gridAdapter; 
 private Button mButton; 
 private String depp; 
 private EditText textView; 
 @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) { 
 if (position == gridAdapter.getMaxPosition() - 1) { 
 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9 
 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); 
 } 
 } 
 }); 
 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.upload(imagePaths,depp); 
 } 
 }.start(); 
 } 
 }); 
 } 
 @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; 
 } 
 } 
 } 
 private void loadAdpater(ArrayList<String> paths){ 
 if(imagePaths == null){ 
 imagePaths = new ArrayList<>(); 
 } 
 imagePaths.clear(); 
 imagePaths.addAll(paths); 
 try{ 
 JSONArray obj = new JSONArray(imagePaths); 
 Log.e("--", obj.toString()); 
 }catch (Exception e){ 
 e.printStackTrace(); 
 } 
 gridAdapter.notifyDataSetChanged(); 
 } 
 private class GridAdapter extends BaseAdapter{ 
 private ArrayList<String> listUrls; 
 private int mMaxPosition; 
 private LayoutInflater inflater; 
 public GridAdapter(ArrayList<String> listUrls) { 
 this.listUrls = listUrls; 
 inflater = LayoutInflater.from(MainActivity.this); 
 } 
 public int getCount() { 
 if (listUrls.size() == 9) { 
 mMaxPosition = listUrls.size()+1; 
 } else { 
 mMaxPosition = listUrls.size()+1; 
 } 
 return mMaxPosition; 
 } 
 public int getMaxPosition(){ 
 return mMaxPosition; 
 } 
 @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(); 
 } 
 Log.d("", "position:"+position+" mMaxPosition:"+mMaxPosition); 
 if (position==mMaxPosition-1) { 
// holder.image.setTag("default"); 
 holder.image.setImageResource(R.mipmap.ic_launcher); 
 holder.image.setVisibility(View.VISIBLE); 
 if(position==6&&mMaxPosition==7){ 
 holder.image.setImageResource(R.mipmap.ic_launcher); 
 holder.image.setVisibility(View.GONE); 
 } 
 } else { 
 final String path=listUrls.get(position); 
 Glide.with(MainActivity.this) 
 .load(new File(path)) 
 .placeholder(R.mipmap.default_error) 
 .error(R.mipmap.default_error) 
 .centerCrop() 
 .crossFade() 
 .into(holder.image); 
 } 
 return convertView; 
 } 
 public class ViewHolder { 
 public ImageView image; 
 } 
 } 
} 

上传的类：FileUploadManager.java

package com.lidong.photopickersample; 
import android.util.Log; 
import com.squareup.okhttp.MediaType; 
import com.squareup.okhttp.RequestBody; 
import java.io.File; 
import java.util.ArrayList; 
import retrofit.Call; 
import retrofit.Callback; 
import retrofit.GsonConverterFactory; 
import retrofit.Response; 
import retrofit.Retrofit; 
import retrofit.http.Multipart; 
import retrofit.http.POST; 
import retrofit.http.Part; 
 
public class FileUploadManager { 
 private static final String ENDPOINT = "http://192.168.1.122:8080"; 
 public interface FileUploadService { 
  
 @Multipart 
 @POST("/upload") 
 Call<String> uploadImage(@Part("fileName") String description, 
  @Part("file\"; filename=\"image.png\"") RequestBody imgs); 
  
 @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); 
 } 
 private static final Retrofit sRetrofit = new Retrofit .Builder() 
 .baseUrl(ENDPOINT) 
 .addConverterFactory(GsonConverterFactory.create()) 
// .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) // 使用RxJava作为回调适配器 
 .build(); 
 private static final FileUploadService apiManager = sRetrofit.create(FileUploadService.class); 
  
 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(Response<String> response, Retrofit retrofit) { 
 Log.v("Upload", response.message()); 
 Log.v("Upload", "success"); 
 } 
 @Override 
 public void onFailure(Throwable t) { 
 Log.e("Upload", t.toString()); 
 } 
 }); 
 } 
} 

效果：

关于Android上传功能的更多内容请点击专题：Android上传操作汇总进行学习。

本文已被整理到了《Android微信开发教程汇总》，欢迎大家学习阅读。

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