Android开发：仿微信和QQ空间发说说相册读取、拍照、图片裁剪和图片上传服务器等功能的实现

        做一个项目中有这需求，当时找资料做的时候，感觉很麻烦！这里做个总结，与大家分享下，方便大家更容易的开发！

第一步：添加依赖包：
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.2.1'
    compile project(':photopicker')
    compile 'com.squareup.retrofit2:converter-gson:2.0.0'
    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0'
    compile 'io.reactivex:rxjava:1.1.0'
    compile 'io.reactivex:rxandroid:1.1.0'
    compile 'com.squareup.retrofit2:retrofit:2.0.0'
}

第二步：导库：photopicker(图片选择器)
（也可以用依赖包:compile 'com.foamtrace:photopicker:1.0'）

第三步：AndroidManifest.xml中：

    权限：
    
    手动添加photopicker的activity（我用的时候，没有自动生成，需要手动导入）
    

第四步：上代码

MainActivity中：

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;

public class MainActivity extends AppCompatActivity {
    //111111
    private static final int REQUEST_CAMERA_CODE = 10;
    private static final int REQUEST_PREVIEW_CODE = 20;
    private ArrayList imagePaths = new ArrayList<>();
    private ImageCaptureManager captureManager; // 相机拍照处理类
    private GridAdapter gridAdapter;


    private GridView gridView;
    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);

        //22222
        int cols = getResources().getDisplayMetrics().widthPixels / getResources().getDisplayMetrics().densityDpi;
        cols = cols < 3 ? 3 : cols;
        gridView.setNumColumns(cols);

        // 3333preview
        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 list = data.getStringArrayListExtra(PhotoPickerActivity.EXTRA_RESULT);
                    Log.d(TAG, "list: " + "list = [" + list.size());
                    loadAdpater(list);
                    break;
                // 预览
                case REQUEST_PREVIEW_CODE:
                    ArrayList ListExtra = data.getStringArrayListExtra(PhotoPreviewActivity.EXTRA_RESULT);
                    Log.d(TAG, "ListExtra: " + "ListExtra = [" + ListExtra.size());
                    loadAdpater(ListExtra);
                    break;
            }
        }
    }

    private void loadAdpater(ArrayList 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 listUrls;
        private LayoutInflater inflater;
        public GridAdapter(ArrayList 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.add);
            }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;
        }
    }
}

布局activity_main.xml中：

     

适配器中的条目：item_image.xml




在styles.xml中：

 
      
    
    
文件上传下载的管理类：

import android.util.Log;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import okhttp3.MediaType;
import okhttp3.RequestBody;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
import retrofit2.http.Multipart;
import retrofit2.http.POST;
import retrofit2.http.Part;
import retrofit2.http.PartMap;




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 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 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 uploadImage(@Part("description") String description,@PartMap
                                 Map 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 paths,String desp){
        RequestBody[] requestBody= new RequestBody[6];
        if (paths.size()>0) {
            for (int i=0;i call = apiManager.uploadImage( desp,requestBody[0],requestBody[1],requestBody[2],requestBody[3],requestBody[4],requestBody[5]);
        call.enqueue(new Callback() {
            @Override
            public void onResponse(Call call, Response response) {
                Log.d(TAG, "onResponse() called with: " + "call = [" + call + "], response = [" + response + "]");
            }

            @Override
            public void onFailure(Call call, Throwable t) {
                Log.d(TAG, "onFailure() called with: " + "call = [" + call + "], t = [" + t + "]");
            }
        });

    }

    /**
     *
     * @param paths
     * @param desp
     */
    public static void uploadMany(ArrayList paths,String desp){
        Map photos = new HashMap<>();
        if (paths.size()>0) {
            for (int i=0;i stringCall = apiManager.uploadImage(desp, photos);
        stringCall.enqueue(new Callback() {
            @Override
            public void onResponse(Call call, Response response) {
                Log.d(TAG, "onResponse() called with: " + "call = [" + call + "], response = [" + response + "]");
            }

            @Override
            public void onFailure(Call call, Throwable t) {
                Log.d(TAG, "onFailure() called with: " + "call = [" + call + "], t = [" + t + "]");
            }
        });
    }
}