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; 

/**
 * @
 * @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 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; 

/**
 * Created by lidong on 2016/2/29
 */
public class FileUploadManager { 

 private static final String ENDPOINT = "http://192.168.1.122:8080"; 

 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);
 } 

 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); 

 /**
 * 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(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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