Android基礎_一次上傳多張圖片

獲取許可權

    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

頁面佈局視圖：

效果是：點擊圖片1：拍照上傳，1張或多張。

              點擊圖片2：從相冊中選擇照片上傳

Activity核心代碼：

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.GridLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.example.utils.BitMapUtils;
import com.example.utils.FileUtils;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.UUID;

public class UpLoadActivity extends Activity implements View.OnClickListener{

    private ImageView image1,image2;
    private GridLayout showImagePanal;
    private EditText inMessage;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_up_load);
        image1=(ImageView)findViewById(R.id.imageOne);
        image2=(ImageView)findViewById(R.id.imageTwo);
        showImagePanal=(GridLayout)findViewById(R.id.showImagePanal);
        inMessage=(EditText)findViewById(R.id.userMessage);

        image1.setOnClickListener(this);
        image2.setOnClickListener(this);
    }
    //點擊圖像，選擇圖片
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.imageOne:
                Intent intent1 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(intent1, 0);
                break;
            case R.id.imageTwo:
                Intent intent2=new Intent();
                intent2.setAction(Intent.ACTION_GET_CONTENT);
                intent2.setType("image/*");
                startActivityForResult(intent2, 1);
                break;
            default:
                break;
        }
    }

    private SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
    //記錄已經拍攝或者選擇的圖像集
    private List images=new ArrayList();
    //接收返回的結果
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode==RESULT_OK){
            switch (requestCode) {
                case 0:
                    Bundle bundle = data.getExtras();//獲取相機拍照後返回值
                    Bitmap bitmap = (Bitmap) bundle.get("data");//獲取拍照圖像
                    String fileName = "IMG_" + sdf.format(new Date()) + ".jpg";
                    String path = getApplicationContext().getCacheDir()
                            .getAbsolutePath() + "/images/" + fileName;
                    FileOutputStream b = null;
                    File file = new File(path);
                    if (!file.getParentFile().exists())
                        file.getParentFile().mkdirs();// 創建文件夾
                    try {
                        b = new FileOutputStream(path);
                        bitmap.compress(Bitmap.CompressFormat.JPEG, 60, b);
                        b.flush();
                        b.close();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    Log.i("-------------", "path:" + path);
                    images.add(path);//記錄文件路徑
                    //bitmap = BitMapUtils.getSmallBitmap(path);
                    //image1.setImageBitmap(bitmap);
                    break;
                case 1:
                    Uri uri = data.getData();//獲取選擇的圖片Uri
                    String path2 = FileUtils.getPath(this, uri);//獲取圖片真實保存位置
                    images.add(path2);//記錄文件路徑
                    //Bitmap bitmap2 = BitMapUtils.getSmallBitmap(path2);//獲取壓縮圖像
                    //image2.setImageBitmap(bitmap2);
                    break;
                default:
                    break;
            }
        }
        if(requestCode==1 || requestCode==0){
            ImageView image=new ImageView(this);
            image.setId(images.size()+1);
            image.setLayoutParams(new LinearLayout.LayoutParams(80, 80));
            Bitmap bitmap = BitMapUtils.getSmallBitmap(images.get(images.size()-1)+"");//獲取壓縮圖像
            image.setImageBitmap(bitmap);
            showImagePanal.addView(image);
        }
    }

    //發佈
    HttpURLConnection conn=null;
    public void doSend(View view){
        Log.i("-------------", "--------start---------");
        new Thread(new Runnable() {
            public void run() {
                String msg = inMessage.getText().toString();
                String path="Http://10.0.2.2:8080/Web_Project/UploadImageServlet?inputMessage="+msg;
                try {
                    URL url = new URL(path);
                    String result = null;
                    String BOUNDARY = UUID.randomUUID().toString(); // 邊界標識 隨機生成;
                    String PREFIX = "--", LINE_END = "\r\n";
                    String CONTENT_TYPE = "multipart/form-data"; // 內容類型
                    HttpURLConnection conn = (HttpURLConnection) url
                            .openConnection();
                    conn.setReadTimeout(25000);
                    conn.setConnectTimeout(5000);
                    conn.setDoInput(true); // 允許輸入流
                    conn.setDoOutput(true); // 允許輸出流
                    conn.setUseCaches(false); // 不允許使用緩存
                    conn.setRequestMethod("POST"); // 請求方式
                    conn.setRequestProperty("Charset", "UTF-8"); // 設置編碼
                    conn.setRequestProperty("connection", "keep-alive");
                    conn.setRequestProperty("Content-Type", CONTENT_TYPE
                            + ";boundary=" + BOUNDARY);

                    if (images != null&&images.size()>0) {
                        DataOutputStream dos = new DataOutputStream(conn
                                .getOutputStream());

                        for (int i = 0; i < images.size(); i++) {
                            File file=new File(images.get(i).toString());
                            Log.i("--------------------", "file"+i+"="+file.getName());
                            /**
                             * 當文件不為空，把文件包裝並且上傳
                             */
                            StringBuffer sb = new StringBuffer();
                            sb.append(PREFIX);
                            sb.append(BOUNDARY);
                            sb.append(LINE_END);
                            /**
                             * 這裡重點註意： name裡面的值為服務端需要key 只有這個key 才可以得到對應的文件
                             * filename是文件的名字，包含尾碼名的 比如:abc.png
                             */

                            sb.append("Content-Disposition: form-data; name=\"uimages\"; filename=\""
                                    + file.getName() + "\"" + LINE_END);
                            sb.append("Content-Type: application/octet-stream; charset=UTF-8"
                                    + LINE_END);
                            sb.append(LINE_END);
                            Log.i("------------", "--Header--"+sb.toString());
                            dos.write(sb.toString().getBytes());
                            InputStream is = new FileInputStream(file);
                            byte[] bytes = new byte[1024];
                            int len = 0;
                            while ((len = is.read(bytes)) != -1) {
                                dos.write(bytes, 0, len);
                            }
                            is.close();
                            dos.write(LINE_END.getBytes());

                        }

                        byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END)
                                .getBytes();
                        dos.write(end_data);
                        dos.flush();
                        /**
                         * 獲取響應碼 200=成功 當響應成功，獲取響應的流
                         */
                        int res = conn.getResponseCode();
                        if (res == 200) {

                            InputStream input = conn.getInputStream();
                            StringBuffer sb1 = new StringBuffer();
                            int ss;
                            while ((ss = input.read()) != -1) {
                                sb1.append((char) ss);
                            }
                            result = sb1.toString();
                            Log.i("--------------", "result : " + result);
                        }

                    }
                    Log.i("-------------", "--------responseCode:---------"
                            + conn.getResponseCode());

                    Log.i("-------------", "--------end---------");
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    if (conn != null)
                        conn.disconnect();
                }
            }
        }).start();
    }
}

 最終效果圖：