第二階段衝刺五

今天主要完成的任務：客戶端上傳文件到服務器

遇到的困難：圖片上傳的數量不確定，有時會爲空，而okhttputils框架不能上傳空文件

解決辦法：判斷文件是否爲空，並採用HashMao方式進行圖片的儲存

源程序代碼：

Record.java

package com.itheima.network.fragment;

import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.RadioGroup;
import android.widget.SimpleAdapter;
import android.widget.SimpleAdapter.ViewBinder;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

import com.itheima.network.R;
import com.itheima.network.func_reference.MyDialog;
import com.itheima.network.store.FindUserId;
import com.jph.takephoto.app.TakePhoto;
import com.jph.takephoto.app.TakePhotoImpl;
import com.jph.takephoto.compress.CompressConfig;
import com.jph.takephoto.model.CropOptions;
import com.jph.takephoto.model.InvokeParam;
import com.jph.takephoto.model.TContextWrap;
import com.jph.takephoto.model.TResult;
import com.jph.takephoto.permission.InvokeListener;
import com.jph.takephoto.permission.PermissionManager;
import com.jph.takephoto.permission.TakePhotoInvocationHandler;
import com.zhy.http.okhttp.OkHttpUtils;
import com.zhy.http.okhttp.callback.StringCallback;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import okhttp3.Call;

public class Record extends Fragment implements MyDialog.OnButtonClickListener, AdapterView.OnItemClickListener,
        TakePhoto.TakeResultListener, InvokeListener
{
    private MyDialog dialog;// 圖片選擇對話框
    public static final int NONE = 0;
    public static final int PHOTOHRAPH = 1;// 拍照
    public static final int PHOTOZOOM = 2; // 縮放
    public static final int PHOTORESOULT = 3;// 結果
    public static final String IMAGE_UNSPECIFIED = "image/*";

    private GridView gridView; // 網格顯示縮略圖
    private final int IMAGE_OPEN = 4; // 打開圖片標記
    private String pathImage; // 選擇圖片路徑
    private Bitmap bmp; // 導入臨時圖片
    private ArrayList<HashMap<String, Bitmap>> imageItem;
    private SimpleAdapter simpleAdapter; // 適配器
    private EditText note; // 筆記文本
    private EditText title; // 標題文本
    private EditText kemu; //學科
    private Button handin; // 上傳按鈕
    private RadioGroup rg; // 單選按鈕組
    private boolean judge; // 判定公開/私有
    private View mview;
    private Context mContext;

    TakePhoto takePhoto;
    InvokeParam invokeParam;
    String imagePath;
    File file;
    Uri uri;
    int size;
    CropOptions cropOptions;
    Bitmap bitmap;
    File test;


    @SuppressLint("SourceLockedOrientationActivity")
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState)
    {
        View view=View.inflate(getActivity(), R.layout.fragment_record,null);
        getTakePhoto().onCreate(savedInstanceState);
        mview=view;
        mContext=view.getContext();
        //上傳文件到服務器中
        init();
        //加載圖片與回顯
        initData();
        initEvents();
        return view;
    }

    public void initEvents()
    {
        //各控件初始化
        file = new File(mContext.getExternalCacheDir(), System.currentTimeMillis() + ".png");
        uri = Uri.fromFile(file);
        size = Math.min(getResources().getDisplayMetrics().widthPixels, getResources().getDisplayMetrics().heightPixels);
        cropOptions = new CropOptions.Builder().setOutputX(size).setOutputX(size).setWithOwnCrop(false).create();
    }

    private void init()
    {
        //聲明
        note = mview.findViewById(R.id.Wnote);
        gridView= mview.findViewById(R.id.gridView);
        handin = mview.findViewById(R.id.handin);
        title = mview.findViewById(R.id.title);
        kemu = mview.findViewById(R.id.kemu);
        rg = mview.findViewById(R.id.rg);
        note.setHorizontallyScrolling(true);
        gridView.setOnItemClickListener(this);
        dialog = new MyDialog(this.getActivity());
        dialog.setOnButtonClickListener(this);
        // activity中調用其他activity中組件的方法
        LayoutInflater layout = this.getLayoutInflater();
        View view = layout.inflate(R.layout.layout_select_photo, null);

        //單選按鈕（公開/私有）
        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener()
        {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId)
            {
                if(checkedId == R.id.ok){
                    judge = true;
                }else{
                    judge = false;
                }
            }
        });

        handin.setOnClickListener(new View.OnClickListener()
        {
            //是否公開
            private String see_str = "";
            //正文
            private String note_str = "";
            //標題
            private String title_str = "";
            //學科
            private  String kemu_str = "";
            //年級(傳參獲取)
            private String year_str = "3";
            FindUserId findUserId=new FindUserId(getActivity());
            String user_str=findUserId.ReadUserName();
            int userID=findUserId.ReadUserId();
            @Override
            public void onClick(View v) {
                Map<String,File> fileMap=new HashMap<>();
                if(judge){
                    see_str = "public";
                }else{
                    see_str = "private";
                }
                note_str = note.getText().toString();
                title_str = title.getText().toString();
                kemu_str = kemu.getText().toString();


                //圖片文件,設定最多上傳3張，不包括+號圖片。
                int pic_i=0;
                for(HashMap<String, Bitmap> pic:imageItem){
                    Set<String> set=pic.keySet();
                    for(String key:set){
                        if(pic_i==0){
                            //跳過默認的+號圖片
                            pic_i++;
                            continue;
                        }
                        //取出bitmap，轉換成file，上傳
                        else if(pic_i==1){
                            Bitmap fbm1 = pic.get(key);
                            //設置文件命名前綴部分
                            String image1user = user_str+"_image1";
                            //調用方法生成圖片文件
                            File mFile1 = doImage(fbm1,image1user);
                            fileMap.put("image1.png",mFile1);
                            pic_i++;
                        }
                        else if(pic_i==2){
                            Bitmap fbm2 = pic.get(key);
                            //設置文件命名前綴部分
                            String image2user = user_str+"_image2";
                            //調用方法生成圖片文件
                            File mFile2 = doImage(fbm2,image2user);
                            fileMap.put("image2.png",mFile2);
                            pic_i++;
                        }
                        else if(pic_i==3){
                            Bitmap fbm3 = pic.get(key);
                            //設置文件命名前綴部分
                            String image3user = user_str+"_image3";
                            //調用方法生成圖片文件
                            File mFile3= doImage(fbm3,image3user);
                            fileMap.put("image3.png",mFile3);
                            pic_i++;
                        }
                    }
                }

                String URL="http://39.101.190.190:8080/CloudNoteServlet/UserServlet"+"?method=uploading&title="+title_str+
                        "&see="+see_str+"&kemu="+kemu_str+"&userID="+userID;
                String noteuser = user_str+"_note";
                File Notefile = doString(note_str,noteuser);
                fileMap.put("note.txt",Notefile);
                Map<String, String> params = new HashMap<>();
                params.put("username",user_str);
                OkHttpUtils.post()
                        .files("files",fileMap)
                        .url(URL)
                        .params(params)
                        .build()
                        .connTimeOut(20000)
                        .writeTimeOut(20000)
                        .readTimeOut(20000)
                        .execute(new StringCallback( ) {
                            @Override
                            public void onError(Call call, Exception e, int id)
                            {
                                Toast.makeText(getActivity(),"上傳文件出現異常，請重試"+id,Toast.LENGTH_SHORT).show();
                            }

                            @Override
                            public void onResponse(String response, int id)
                            {
                                if(response.equals("fail"))
                                {
                                    Toast.makeText(getActivity(),"上傳文件失敗"+id,Toast.LENGTH_SHORT).show();
                                }else{
                                    Toast.makeText(getActivity(),"上傳文件成功"+id,Toast.LENGTH_SHORT).show();
                                }
                            }
                        });
            }
        });
    }
    private void initData()
    {
        /*
         * 載入默認圖片添加圖片加號
         */
        bmp = BitmapFactory.decodeResource(getResources(),
                R.drawable.ic_addpic); // 加號
        imageItem = new ArrayList<HashMap<String, Bitmap>>();
        HashMap<String, Bitmap> map = new HashMap<String, Bitmap>();
        map.put("itemImage", bmp);
        imageItem.add(map);
        simpleAdapter = new SimpleAdapter(this.getActivity(), imageItem,
                R.layout.griditem_addpic, new String[] { "itemImage" },
                new int[] { R.id.imageView1 });
        simpleAdapter.setViewBinder(new ViewBinder() {
            @Override
            public boolean setViewValue(View view, Object data,
                                        String textRepresentation) {
                // TODO Auto-generated method stub
                if (view instanceof ImageView && data instanceof Bitmap) {
                    ImageView i = (ImageView) view;
                    i.setImageBitmap((Bitmap) data);
                    return true;
                }
                return false;
            }
        });
        gridView.setAdapter(simpleAdapter);
    }

    //Bitmap轉file
    public  File doImage(Bitmap fbitmap, String user) {
        ByteArrayOutputStream fbaos = new ByteArrayOutputStream();
        fbitmap.compress(Bitmap.CompressFormat.JPEG,100,fbaos);
        int options = 100;
        //判斷是否大於20kb，是則繼續壓縮
        while(fbaos.toByteArray().length/1024>20 &&options>10){
            fbaos.reset();
            options-=10;
            fbitmap.compress(Bitmap.CompressFormat.JPEG,options,fbaos);
            long length = fbaos.toByteArray().length;
        }
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
        Date date = new Date(System.currentTimeMillis());
        String filename = user+"_"+format.format(date);
        String filepath = mContext.getExternalFilesDir(null).toString()+"/CloudNoteImage";
        File pathfile = new File(filepath);
        if(!pathfile.exists()){
            pathfile.mkdir();
        }
        File file = new File(filepath,filename+".png");
        //注意創建文件，否則會發生文件讀取錯誤
        if(!file.exists()){
            try{
                file.createNewFile();
            }catch (IOException e){
                e.printStackTrace();
            }
        }
        try{
            FileOutputStream fos = new FileOutputStream(file);
            try{
                fos.write(fbaos.toByteArray());
                fos.flush();
                fos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }catch (IOException e){
            e.printStackTrace();
        }
        return file;
    }

    //將正文信息寫入txt文件
    public  File doString(String strwrite, String user){
        //取時間
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
        Date date = new Date(System.currentTimeMillis());
        //生成文件名
        String filename = user+"_"+format.format(date);

        String filepath =mContext.getExternalFilesDir(null).toString()+"/CloudNoteTXT";
        //創建文件
        File pathfile = new File(filepath);
        if(!pathfile.exists()){
            pathfile.mkdir();
        }
        File file = new File(filepath,filename+".txt");
        if(!file.exists()){
            try{
                file.createNewFile();
            }catch (IOException e){
                e.printStackTrace();
            }
        }
        try{
            FileOutputStream outputStream = new FileOutputStream(file);
            outputStream.write(strwrite.getBytes());
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return file;
    }
    //調用相機
    @Override
    public void camera() {
        takePhoto.onPickFromCaptureWithCrop(uri, cropOptions);
    }

    //調用相冊
    @Override
    public void gallery() {
        takePhoto.onPickFromGalleryWithCrop(uri, cropOptions);
    }

    @Override
    public void cancel() {
        // TODO Auto-generated method stub
        dialog.cancel();
    }



    @Override
    public void onResume()
    {
        // TODO Auto-generated method stub
        super.onResume();
        //判定有圖片添加
        if (!TextUtils.isEmpty(pathImage))
        {
            //bitmap回顯
            Bitmap addbmp = BitmapFactory.decodeFile(pathImage);
            //將信息存入Map中
            HashMap<String, Bitmap> map = new HashMap<String, Bitmap>();
            map.put("itemImage", addbmp);
            imageItem.add(map);
            //在griditem_addpic.xml中向imageView1添加圖片
            simpleAdapter = new SimpleAdapter(this.getActivity(), imageItem,
                    R.layout.griditem_addpic, new String[] { "itemImage" },
                    new int[] { R.id.imageView1 });
            simpleAdapter.setViewBinder(new ViewBinder() {
                @Override
                public boolean setViewValue(View view, Object data,
                                            String textRepresentation)
                {
                    // TODO Auto-generated method stub
                    if (view instanceof ImageView && data instanceof Bitmap)
                    {
                        ImageView i = (ImageView) view;
                        i.setImageBitmap((Bitmap) data);
                        return true;
                    }
                    return false;
                }
            });
            gridView.setAdapter(simpleAdapter);
            simpleAdapter.notifyDataSetChanged();
            // 刷新後釋放防止手機休眠後自動添加
            pathImage = null;
            dialog.dismiss();
        }

    }

    @Override
    public void onItemClick(AdapterView<?> parent, View v, int position, long id)
    {
        // TODO Auto-generated method stub
        if (imageItem.size() == 4&&position==0) { // 第一張爲默認圖片,點擊+號時才判定是否已滿
            Toast.makeText(this.getActivity(), "圖片數3張已滿",
                    Toast.LENGTH_SHORT).show();
        } else if (position == 0) { // 點擊圖片位置爲+ 0對應0張圖片
            // 選擇圖片
            dialog.show();

            // 通過onResume()刷新數據
        } else {
            dialog(position);
        }

    }

    /*
     * Dialog對話框提示用戶刪除操作 position爲刪除圖片位置
     */
    protected void dialog(final int position)
    {
        AlertDialog.Builder builder = new Builder(this.getActivity());
        builder.setMessage("確認移除已添加圖片嗎？");
        builder.setTitle("提示");
        builder.setPositiveButton("確認", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                imageItem.remove(position);
                simpleAdapter.notifyDataSetChanged();
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        builder.create().show();
    }




    @Override
    public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        getTakePhoto().onActivityResult(requestCode, resultCode, data);
        super.onActivityResult(requestCode, resultCode, data);
    }

    @Override
    public void onSaveInstanceState(@NonNull Bundle outState) {
        getTakePhoto().onSaveInstanceState(outState);
        super.onSaveInstanceState(outState);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        //以下代碼爲處理Android6.0、7.0動態權限所需
        PermissionManager.TPermissionType type = PermissionManager.onRequestPermissionsResult(requestCode, permissions, grantResults);
        PermissionManager.handlePermissionsResult(getActivity(), type, invokeParam, this);
    }

    @Override
    public PermissionManager.TPermissionType invoke(InvokeParam invokeParam) {
        PermissionManager.TPermissionType type = PermissionManager.checkPermission(TContextWrap.of(this), invokeParam.getMethod());
        if (PermissionManager.TPermissionType.WAIT.equals(type)) {
            this.invokeParam = invokeParam;
        }
        return type;
    }

    public TakePhoto getTakePhoto() {
        //獲得TakePhoto實例
        if (takePhoto == null) {
            takePhoto = (TakePhoto) TakePhotoInvocationHandler.of(this).bind(new TakePhotoImpl(this, this));
        }
        //設置壓縮規則，最大500kb
        takePhoto.onEnableCompress(new CompressConfig.Builder().setMaxSize(500 * 1024).create(), true);
        return takePhoto;
    }

    @Override
    public void takeSuccess(final TResult result) {
        //成功取得照片
        test = new File(result.getImage().getOriginalPath());
        if(test.exists()){
            bitmap = BitmapFactory.decodeFile(result.getImage().getOriginalPath());
            // 將圖片放入gridview中
                HashMap<String, Bitmap> map = new HashMap<String, Bitmap>();
                map.put("itemImage", bitmap);
                imageItem.add(map);
                simpleAdapter = new SimpleAdapter(this.getActivity(), imageItem,
                        R.layout.griditem_addpic, new String[] { "itemImage" },
                        new int[] { R.id.imageView1 });
                simpleAdapter.setViewBinder(new ViewBinder() {
                    @Override
                    public boolean setViewValue(View view, Object data,
                                                String textRepresentation) {
                        // TODO Auto-generated method stub
                        if (view instanceof ImageView && data instanceof Bitmap) {
                            ImageView i = (ImageView) view;
                            i.setImageBitmap((Bitmap) data);
                            return true;
                        }
                        return false;
                    }
                });
                gridView.setAdapter(simpleAdapter);
                simpleAdapter.notifyDataSetChanged();
                dialog.dismiss();
        }
    }


    @Override
    public void takeFail(TResult result, String msg) {
        //取得失敗
        Toast.makeText(mContext,"設置失敗",Toast.LENGTH_SHORT).show();
    }

    @Override
    public void takeCancel() {
        //取消
    }
}

運行截圖：