編輯:關於Android編程
最近要搞一個項目,需要上傳相冊和拍照的圖片,不負所望,終於完成了! 不過需要說明一下,其實網上很多教程拍照的圖片,都是縮略圖不是很清晰,所以需要在調用照相機的時候,事先生成一個地址,用於標識拍照的圖片URI
具體上傳代碼:
1.選擇圖片和上傳界面,包括上傳完成和異常的回調監聽
package com.spring.sky.image.upload; import java.util.HashMap; import java.util.Map; import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ImageView; import android.widget.ProgressBar; import android.widget.TextView; import android.widget.Toast; import com.spring.sky.image.upload.network.UploadUtil; import com.spring.sky.image.upload.network.UploadUtil.OnUploadProcessListener; /** * @author spring sky<br> * Email :[email protected]<br> * QQ: 840950105<br> * 說明:主要用於選擇文件和上傳文件操作 */ public class MainActivity extends Activity implements OnClickListener,OnUploadProcessListener{ private static final String TAG = "uploadImage"; /** * 去上傳文件 */ protected static final int TO_UPLOAD_FILE = 1; /** * 上傳文件響應 */ protected static final int UPLOAD_FILE_DONE = 2; // /** * 選擇文件 */ public static final int TO_SELECT_PHOTO = 3; /** * 上傳初始化 */ private static final int UPLOAD_INIT_PROCESS = 4; /** * 上傳中 */ private static final int UPLOAD_IN_PROCESS = 5; /*** * 這裡的這個URL是我服務器的javaEE環境URL */ private static String requestURL = "http://192.168.10.160:8080/fileUpload/p/file!upload"; private Button selectButton,uploadButton; private ImageView imageView; private TextView uploadImageResult; private ProgressBar progressBar; private String picPath = null; private ProgressDialog progressDialog; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); initView(); } /** * 初始化數據 */ private void initView() { selectButton = (Button) this.findViewById(R.id.selectImage); uploadButton = (Button) this.findViewById(R.id.uploadImage); selectButton.setOnClickListener(this); uploadButton.setOnClickListener(this); imageView = (ImageView) this.findViewById(R.id.imageView); uploadImageResult = (TextView) findViewById(R.id.uploadImageResult); progressDialog = new ProgressDialog(this); progressBar = (ProgressBar) findViewById(R.id.progressBar1); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.selectImage: Intent intent = new Intent(this,SelectPicActivity.class); startActivityForResult(intent, TO_SELECT_PHOTO); break; case R.id.uploadImage: if(picPath!=null) { handler.sendEmptyMessage(TO_UPLOAD_FILE); }else{ Toast.makeText(this, "上傳的文件路徑出錯", Toast.LENGTH_LONG).show(); } break; default: break; } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if(resultCode==Activity.RESULT_OK && requestCode == TO_SELECT_PHOTO) { picPath = data.getStringExtra(SelectPicActivity.KEY_PHOTO_PATH); Log.i(TAG, "最終選擇的圖片="+picPath); Bitmap bm = BitmapFactory.decodeFile(picPath); imageView.setImageBitmap(bm); } super.onActivityResult(requestCode, resultCode, data); } /** * 上傳服務器響應回調 */ @Override public void onUploadDone(int responseCode, String message) { progressDialog.dismiss(); Message msg = Message.obtain(); msg.what = UPLOAD_FILE_DONE; msg.arg1 = responseCode; msg.obj = message; handler.sendMessage(msg); } private void toUploadFile() { uploadImageResult.setText("正在上傳中..."); progressDialog.setMessage("正在上傳文件..."); progressDialog.show(); String fileKey = "pic"; UploadUtil uploadUtil = UploadUtil.getInstance();; uploadUtil.setOnUploadProcessListener(this); //設置監聽器監聽上傳狀態 Map<String, String> params = new HashMap<String, String>(); params.put("orderId", "11111"); uploadUtil.uploadFile( picPath,fileKey, requestURL,params); } private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { switch (msg.what) { case TO_UPLOAD_FILE: toUploadFile(); break; case UPLOAD_INIT_PROCESS: progressBar.setMax(msg.arg1); break; case UPLOAD_IN_PROCESS: progressBar.setProgress(msg.arg1); break; case UPLOAD_FILE_DONE: String result = "響應碼:"+msg.arg1+"\n響應信息:"+msg.obj+"\n耗時:"+UploadUtil.getRequestTime()+"秒"; uploadImageResult.setText(result); break; default: break; } super.handleMessage(msg); } }; @Override public void onUploadProcess(int uploadSize) { Message msg = Message.obtain(); msg.what = UPLOAD_IN_PROCESS; msg.arg1 = uploadSize; handler.sendMessage(msg ); } @Override public void initUpload(int fileSize) { Message msg = Message.obtain(); msg.what = UPLOAD_INIT_PROCESS; msg.arg1 = fileSize; handler.sendMessage(msg ); } }
2.選擇圖片界面,主要涉及兩種方式:選擇圖片和及時拍照圖片
package com.spring.sky.image.upload; import android.app.Activity; import android.content.ContentValues; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.LinearLayout; import android.widget.Toast; /** * @author spring sky<br> * Email :[email protected]<br> * QQ: 840950105<br> * @version 創建時間:2012-11-22 上午9:20:03 * 說明:主要用於選擇文件操作 */ public class SelectPicActivity extends Activity implements OnClickListener{ /*** * 使用照相機拍照獲取圖片 */ public static final int SELECT_PIC_BY_TACK_PHOTO = 1; /*** * 使用相冊中的圖片 */ public static final int SELECT_PIC_BY_PICK_PHOTO = 2; /*** * 從Intent獲取圖片路徑的KEY */ public static final String KEY_PHOTO_PATH = "photo_path"; private static final String TAG = "SelectPicActivity"; private LinearLayout dialogLayout; private Button takePhotoBtn,pickPhotoBtn,cancelBtn; /**獲取到的圖片路徑*/ private String picPath; private Intent lastIntent ; private Uri photoUri; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.select_pic_layout); initView(); } /** * 初始化加載View */ private void initView() { dialogLayout = (LinearLayout) findViewById(R.id.dialog_layout); dialogLayout.setOnClickListener(this); takePhotoBtn = (Button) findViewById(R.id.btn_take_photo); takePhotoBtn.setOnClickListener(this); pickPhotoBtn = (Button) findViewById(R.id.btn_pick_photo); pickPhotoBtn.setOnClickListener(this); cancelBtn = (Button) findViewById(R.id.btn_cancel); cancelBtn.setOnClickListener(this); lastIntent = getIntent(); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.dialog_layout: finish(); break; case R.id.btn_take_photo: takePhoto(); break; case R.id.btn_pick_photo: pickPhoto(); break; default: finish(); break; } } /** * 拍照獲取圖片 */ private void takePhoto() { //執行拍照前,應該先判斷SD卡是否存在 String SDState = Environment.getExternalStorageState(); if(SDState.equals(Environment.MEDIA_MOUNTED)) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//"android.media.action.IMAGE_CAPTURE" /*** * 需要說明一下,以下操作使用照相機拍照,拍照後的圖片會存放在相冊中的 * 這裡使用的這種方式有一個好處就是獲取的圖片是拍照後的原圖 * 如果不實用ContentValues存放照片路徑的話,拍照後獲取的圖片為縮略圖不清晰 */ ContentValues values = new ContentValues(); photoUri = this.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, photoUri); /**-----------------*/ startActivityForResult(intent, SELECT_PIC_BY_TACK_PHOTO); }else{ Toast.makeText(this,"內存卡不存在", Toast.LENGTH_LONG).show(); } } /*** * 從相冊中取圖片 */ private void pickPhoto() { Intent intent = new Intent(); intent.setType("image/*"); intent.setAction(Intent.ACTION_GET_CONTENT); startActivityForResult(intent, SELECT_PIC_BY_PICK_PHOTO); } @Override public boolean onTouchEvent(MotionEvent event) { finish(); return super.onTouchEvent(event); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if(resultCode == Activity.RESULT_OK) { doPhoto(requestCode,data); } super.onActivityResult(requestCode, resultCode, data); } /** * 選擇圖片後,獲取圖片的路徑 * @param requestCode * @param data */ private void doPhoto(int requestCode,Intent data) { if(requestCode == SELECT_PIC_BY_PICK_PHOTO ) //從相冊取圖片,有些手機有異常情況,請注意 { if(data == null) { Toast.makeText(this, "選擇圖片文件出錯", Toast.LENGTH_LONG).show(); return; } photoUri = data.getData(); if(photoUri == null ) { Toast.makeText(this, "選擇圖片文件出錯", Toast.LENGTH_LONG).show(); return; } } String[] pojo = {MediaStore.Images.Media.DATA}; Cursor cursor = managedQuery(photoUri, pojo, null, null,null); if(cursor != null ) { int columnIndex = cursor.getColumnIndexOrThrow(pojo[0]); cursor.moveToFirst(); picPath = cursor.getString(columnIndex); cursor.close(); } Log.i(TAG, "imagePath = "+picPath); if(picPath != null && ( picPath.endsWith(".png") || picPath.endsWith(".PNG") ||picPath.endsWith(".jpg") ||picPath.endsWith(".JPG") )) { lastIntent.putExtra(KEY_PHOTO_PATH, picPath); setResult(Activity.RESULT_OK, lastIntent); finish(); }else{ Toast.makeText(this, "選擇圖片文件不正確", Toast.LENGTH_LONG).show(); } } }
3. 上傳工具類,主要實現了圖片的上傳,上傳過程的初始化監聽和上傳完成的監聽,還有上傳耗時的計算
package com.spring.sky.image.upload.network; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.Iterator; import java.util.Map; import java.util.UUID; import android.util.Log; /** * * 上傳工具類 * @author spring sky<br> * Email :[email protected]<br> * QQ: 840950105<br> * 支持上傳文件和參數 */ public class UploadUtil { private static UploadUtil uploadUtil; private static final String BOUNDARY = UUID.randomUUID().toString(); // 邊界標識 隨機生成 private static final String PREFIX = "--"; private static final String LINE_END = "\r\n"; private static final String CONTENT_TYPE = "multipart/form-data"; // 內容類型 private UploadUtil() { } /** * 單例模式獲取上傳工具類 * @return */ public static UploadUtil getInstance() { if (null == uploadUtil) { uploadUtil = new UploadUtil(); } return uploadUtil; } private static final String TAG = "UploadUtil"; private int readTimeOut = 10 * 1000; // 讀取超時 private int connectTimeout = 10 * 1000; // 超時時間 /*** * 請求使用多長時間 */ private static int requestTime = 0; private static final String CHARSET = "utf-8"; // 設置編碼 /*** * 上傳成功 */ public static final int UPLOAD_SUCCESS_CODE = 1; /** * 文件不存在 */ public static final int UPLOAD_FILE_NOT_EXISTS_CODE = 2; /** * 服務器出錯 */ public static final int UPLOAD_SERVER_ERROR_CODE = 3; protected static final int WHAT_TO_UPLOAD = 1; protected static final int WHAT_UPLOAD_DONE = 2; /** * android上傳文件到服務器 * * @param filePath * 需要上傳的文件的路徑 * @param fileKey * 在網頁上<input type=file name=xxx/> xxx就是這裡的fileKey * @param RequestURL * 請求的URL */ public void uploadFile(String filePath, String fileKey, String RequestURL, Map<String, String> param) { if (filePath == null) { sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在"); return; } try { File file = new File(filePath); uploadFile(file, fileKey, RequestURL, param); } catch (Exception e) { sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在"); e.printStackTrace(); return; } } /** * android上傳文件到服務器 * * @param file * 需要上傳的文件 * @param fileKey * 在網頁上<input type=file name=xxx/> xxx就是這裡的fileKey * @param RequestURL * 請求的URL */ public void uploadFile(final File file, final String fileKey, final String RequestURL, final Map<String, String> param) { if (file == null || (!file.exists())) { sendMessage(UPLOAD_FILE_NOT_EXISTS_CODE,"文件不存在"); return; } Log.i(TAG, "請求的URL=" + RequestURL); Log.i(TAG, "請求的fileName=" + file.getName()); Log.i(TAG, "請求的fileKey=" + fileKey); new Thread(new Runnable() { //開啟線程上傳文件 @Override public void run() { toUploadFile(file, fileKey, RequestURL, param); } }).start(); } private void toUploadFile(File file, String fileKey, String RequestURL, Map<String, String> param) { String result = null; requestTime= 0; long requestTime = System.currentTimeMillis(); long responseTime = 0; try { URL url = new URL(RequestURL); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setReadTimeout(readTimeOut); conn.setConnectTimeout(connectTimeout); 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", CHARSET); // 設置編碼 conn.setRequestProperty("connection", "keep-alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"); conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY); // conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); /** * 當文件不為空,把文件包裝並且上傳 */ DataOutputStream dos = new DataOutputStream(conn.getOutputStream()); StringBuffer sb = null; String params = ""; /*** * 以下是用於上傳參數 */ if (param != null && param.size() > 0) { Iterator<String> it = param.keySet().iterator(); while (it.hasNext()) { sb = null; sb = new StringBuffer(); String key = it.next(); String value = param.get(key); sb.append(PREFIX).append(BOUNDARY).append(LINE_END); sb.append("Content-Disposition: form-data; name=\"").append(key).append("\"").append(LINE_END).append(LINE_END); sb.append(value).append(LINE_END); params = sb.toString(); Log.i(TAG, key+"="+params+"##"); dos.write(params.getBytes()); // dos.flush(); } } sb = null; params = null; sb = new StringBuffer(); /** * 這裡重點注意: name裡面的值為服務器端需要key 只有這個key 才可以得到對應的文件 * filename是文件的名字,包含後綴名的 比如:abc.png */ sb.append(PREFIX).append(BOUNDARY).append(LINE_END); sb.append("Content-Disposition:form-data; name=\"" + fileKey + "\"; filename=\"" + file.getName() + "\"" + LINE_END); sb.append("Content-Type:image/pjpeg" + LINE_END); // 這裡配置的Content-type很重要的 ,用於服務器端辨別文件的類型的 sb.append(LINE_END); params = sb.toString(); sb = null; Log.i(TAG, file.getName()+"=" + params+"##"); dos.write(params.getBytes()); /**上傳文件*/ InputStream is = new FileInputStream(file); onUploadProcessListener.initUpload((int)file.length()); byte[] bytes = new byte[1024]; int len = 0; int curLen = 0; while ((len = is.read(bytes)) != -1) { curLen += len; dos.write(bytes, 0, len); onUploadProcessListener.onUploadProcess(curLen); } is.close(); dos.write(LINE_END.getBytes()); byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes(); dos.write(end_data); dos.flush(); // // dos.write(tempOutputStream.toByteArray()); /** * 獲取響應碼 200=成功 當響應成功,獲取響應的流 */ int res = conn.getResponseCode(); responseTime = System.currentTimeMillis(); this.requestTime = (int) ((responseTime-requestTime)/1000); Log.e(TAG, "response code:" + res); if (res == 200) { Log.e(TAG, "request success"); InputStream input = conn.getInputStream(); StringBuffer sb1 = new StringBuffer(); int ss; while ((ss = input.read()) != -1) { sb1.append((char) ss); } result = sb1.toString(); Log.e(TAG, "result : " + result); sendMessage(UPLOAD_SUCCESS_CODE, "上傳結果:" + result); return; } else { Log.e(TAG, "request error"); sendMessage(UPLOAD_SERVER_ERROR_CODE,"上傳失敗:code=" + res); return; } } catch (MalformedURLException e) { sendMessage(UPLOAD_SERVER_ERROR_CODE,"上傳失敗:error=" + e.getMessage()); e.printStackTrace(); return; } catch (IOException e) { sendMessage(UPLOAD_SERVER_ERROR_CODE,"上傳失敗:error=" + e.getMessage()); e.printStackTrace(); return; } } /** * 發送上傳結果 * @param responseCode * @param responseMessage */ private void sendMessage(int responseCode,String responseMessage) { onUploadProcessListener.onUploadDone(responseCode, responseMessage); } /** * 下面是一個自定義的回調函數,用到回調上傳文件是否完成 * * @author shimingzheng * */ public static interface OnUploadProcessListener { /** * 上傳響應 * @param responseCode * @param message */ void onUploadDone(int responseCode, String message); /** * 上傳中 * @param uploadSize */ void onUploadProcess(int uploadSize); /** * 准備上傳 * @param fileSize */ void initUpload(int fileSize); } private OnUploadProcessListener onUploadProcessListener; public void setOnUploadProcessListener( OnUploadProcessListener onUploadProcessListener) { this.onUploadProcessListener = onUploadProcessListener; } public int getReadTimeOut() { return readTimeOut; } public void setReadTimeOut(int readTimeOut) { this.readTimeOut = readTimeOut; } public int getConnectTimeout() { return connectTimeout; } public void setConnectTimeout(int connectTimeout) { this.connectTimeout = connectTimeout; } /** * 獲取上傳使用的時間 * @return */ public static int getRequestTime() { return requestTime; } public static interface uploadProcessListener{ } }
以上代碼,我就不詳細講解原理,相關難點注釋已經寫得很清楚了!分享出來,和大家一起學習!
相關服務器端代碼和客戶端下載:
android客戶端下載
javaEE服務器端
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