Android拍照或本地图片上传

        前几天，我们客户端这边收到了市场部的一个需求，需要在我们订单成交后，我们的客户端有一个上传交易凭证的功能，那么如何在Android实现上传图片的这个功能呢？在我进行编码之前，我先问自己几个问题。

第一， 图片是直接选择图库里的，还是需要拍照和选择图片两个选项？

因为在选择图片的时候，会有一个拍照的按钮，也可以实现拍照的功能。

第二， 需不需要本地缓存？

 本地缓存值得是，在我们的图片上传后，是否在下次直接显示，而不是从服务器读取。

第三，图片是否需要压缩？

众所周知，图片这种资源，因为体积较大，在网络上传输还是很慢的，所以，我们需要在我们的传输时，适当的对文件的大小进行压缩，那么就要根据我们自身的需求，按照一定的比例来进行压缩。

在思考完这几个问题后，根据我们自己的需求，我们在上传时有两个选项的，一个是拍照，一个是选择图片，另外我们需要做本地缓存，还有，图片上传不需要压缩。

那么我们就可以开始实现了，首先在我们的主fragment里，添加如下代码，如果你是activity，当然也可以。

做一个ImageView,作为我们上传的图像。

    mPic1 = (ImageView) view.findViewById(R.id.ImageView01);    mPic1.setOnClickListener(mPhotoListener);    private View.OnClickListener mPhotoListener = new View.OnClickListener() {@Overridepublic void onClick(View v) {int id = v.getId();if (id == R.id.ImageView01) {Intent popupIntent = new Intent(getActivity(), PopupActivity.class);mPhotoId = id;startActivityForResult(popupIntent, 1);}}};    

然后，我们跳转到另外一个PopupActivity，让我们选择,

PopupActivity.java

package com.chuanlaoda.android.activity;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import android.app.Activity;import android.app.AlertDialog;import android.content.ActivityNotFoundException;import android.content.DialogInterface;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.Bitmap.CompressFormat;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.ImageView;import android.widget.LinearLayout;import android.widget.Toast;import com.chuanloada.android.R;public class PopupActivity extends Activity implements OnClickListener {    private Button btn_take_photo, btn_pick_photo, btn_cancel;    private LinearLayout layout;    private Intent intent;    private Button showList;    private Button uploadNow;    private String mCurrentPhotoPath;    private Bitmap sourcePic;    private File dir = null;    private String picName = null;    private String uploadFile = null;    static Uri capturedImageUri=null;    private Bitmap bitmap = null;        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.popup);        intent = getIntent();        btn_take_photo = (Button) this.findViewById(R.id.btn_take_photo);        btn_pick_photo = (Button) this.findViewById(R.id.btn_pick_photo);        btn_cancel = (Button) this.findViewById(R.id.btn_cancel);        layout = (LinearLayout) findViewById(R.id.pop_layout);        layout.setOnClickListener(new OnClickListener() {            public void onClick(View v) {                // TODO Auto-generated method stub                Toast.makeText(getApplicationContext(), "提示：点击空白地方可以关闭",                        Toast.LENGTH_SHORT).show();            }        });        btn_cancel.setOnClickListener(this);        btn_pick_photo.setOnClickListener(this);        btn_take_photo.setOnClickListener(this);    }    @Override    public boolean onTouchEvent(MotionEvent event) {        finish();        return true;    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {                if (resultCode != RESULT_OK) {            return;        }        if (data != null) {            if (data.getExtras() != null)            {                bitmap = (Bitmap) data.getExtras().get("data");                intent.putExtras(data.getExtras());                intent.putExtra("uri", capturedImageUri);                intent.putExtra("requestCode", requestCode);                intent.putExtra("image", bitmap);            }                        if (data.getData() != null)                intent.setData(data.getData());                    }        setResult(requestCode, intent);        finish();    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.btn_take_photo:            dispatchTakePictureIntent();            break;        case R.id.btn_pick_photo:            try {                Intent intent = new Intent();                intent.setType("image/*");                intent.setAction(Intent.ACTION_GET_CONTENT);                startActivityForResult(intent, 2);            } catch (ActivityNotFoundException e) {            }            break;        case R.id.btn_cancel:            finish();            break;        default:            break;        }    }        private File createImageFile() throws IOException {        // Create an image file name        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());        String imageFileName = "JPEG_" + timeStamp + "_";        File storageDir = Environment.getExternalStoragePublicDirectory(                Environment.DIRECTORY_PICTURES);        File image = File.createTempFile(            imageFileName,  /* prefix */            ".jpg",         /* suffix */            storageDir      /* directory */        );        // Save a file: path for use with ACTION_VIEW intents        mCurrentPhotoPath = "file:" + image.getAbsolutePath();        return image;    }        private void dispatchTakePictureIntent() {        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        // Ensure that there's a camera activity to handle the intent        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {            // Create the File where the photo should go            File photoFile = null;            try {                photoFile = createImageFile();            } catch (IOException ex) {                // Error occurred while creating the File            }            // Continue only if the File was successfully created            capturedImageUri = Uri.fromFile(photoFile);            if (photoFile != null) {                //takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, capturedImageUri);                startActivityForResult(takePictureIntent, 1);            }        }    }}

Popup.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:gravity="center_horizontal"    android:orientation="vertical"  ><LinearLayout     android:id="@+id/pop_layout"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:gravity="center_horizontal"    android:orientation="vertical"    android:layout_alignParentBottom="true"     android:background="@drawable/btn_style_alert_dialog_background"     >        <Button        android:id="@+id/btn_take_photo"        android:layout_marginLeft="20dip"        android:layout_marginRight="20dip"        android:layout_marginTop="20dip"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="拍照"        android:background="@drawable/btn_style_alert_dialog_button"        android:textStyle="bold"         />    <Button        android:id="@+id/btn_pick_photo"        android:layout_marginLeft="20dip"        android:layout_marginRight="20dip"        android:layout_marginTop="5dip"          android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="从相册选择"         android:background="@drawable/btn_style_alert_dialog_button"         android:textStyle="bold"         />    <Button        android:id="@+id/btn_cancel"       android:layout_marginLeft="20dip"       android:layout_marginRight="20dip"       android:layout_marginTop="15dip"    android:layout_marginBottom="15dip"       android:layout_width="fill_parent"       android:layout_height="wrap_content"       android:text="取消"       android:background="@drawable/btn_style_alert_dialog_cancel"       android:textColor="#ffffff"       android:textStyle="bold"               /></LinearLayout></RelativeLayout>

接下来就是我们需要在我们的主fragment （或者activity）中添加onActivityResult.

public void onActivityResult(int requestCode, int resultCode, Intent data) {    photo = (ImageView) mView.findViewById(mPhotoId);    String pfid=String.valueOf(BusinessDetailsFragment.getPosition(mPhotoId) + 1);    String gsid=String.valueOf(mBusinessId);    String cur_date = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new Date());    switch (resultCode) {case 1:if (data != null) {Uri mImageCaptureUri = (Uri) data.getExtras().get("uri");if (mImageCaptureUri != null) {Bitmap image;try {//image = MediaStore.Images.Media.getBitmap(this.getActivity().getContentResolver(), mImageCaptureUri);image = (Bitmap) data.getExtras().get("image");String fileFullPath = PhotoAPI.savePicsToSdcard(image, mFileLoc);PromptUtils.showProgressDialog(getActivity(), "正在上传照片");    mResult = PhotoAPI.uploadFile(gsid, pfid, fileFullPath);    Cache.addLastPhotoPath(pfid, fileFullPath);    Cache.addLastPhotoDate(gsid, cur_date);    PromptUtils.dismissProgressDialog();        showDialog(mResult);if (image != null) {photo.setImageBitmap(image);}} catch (Exception e) {e.printStackTrace();}} else {Bundle extras = data.getExtras();if (extras != null) {Bitmap image = extras.getParcelable("data");String fileFullPath = PhotoAPI.savePicsToSdcard(image, mFileLoc);PromptUtils.showProgressDialog(getActivity(), "正在上传照片");    mResult = PhotoAPI.uploadFile(gsid, pfid, fileFullPath);    PromptUtils.dismissProgressDialog();    Cache.addLastPhotoPath(pfid, fileFullPath);    Cache.addLastPhotoDate(gsid, cur_date);    showDialog(mResult);if (image != null) {photo.setImageBitmap(image);}}}}break;case 2:if (data != null) {Uri mImageCaptureUri = data.getData();if (mImageCaptureUri != null) {Bitmap image;try {image = MediaStore.Images.Media.getBitmap(this.getActivity().getContentResolver(), mImageCaptureUri);String fileFullPath = getRealPathFromURI(this.getActivity(),mImageCaptureUri);PromptUtils.showProgressDialog(getActivity(), "正在上传照片");    mResult = PhotoAPI.uploadFile(gsid, pfid, fileFullPath);    PromptUtils.dismissProgressDialog();    Cache.addLastPhotoPath(pfid, fileFullPath);    Cache.addLastPhotoDate(gsid, cur_date);    showDialog(mResult);if (image != null) {photo.setImageBitmap(image);}} catch (Exception e) {e.printStackTrace();}} else {Bundle extras = data.getExtras();if (extras != null) {String fileFullPath = getRealPathFromURI(this.getActivity(),mImageCaptureUri);PromptUtils.showProgressDialog(getActivity(), "正在上传照片");mResult = PhotoAPI.uploadFile(gsid, pfid, fileFullPath);PromptUtils.dismissProgressDialog();Cache.addLastPhotoPath(pfid, fileFullPath);Cache.addLastPhotoDate(gsid, cur_date);Bitmap image = extras.getParcelable("data");if (image != null) {photo.setImageBitmap(image);}}}}break;default:break;}    }

另外，我们处理图片上传的代码在这里。

class UploadThread extends Thread {private String result = "";private String actionUrl;private String uploadFile;public UploadThread(String gsid, String pfid, String uploadFile) {String baseUrl = APIConfig.getAPIHost() + "uploadProof";this.actionUrl=baseUrl+"&gsid=" + gsid + "&pfid="+pfid; this.uploadFile = uploadFile;}@Overridepublic void run() {String end = "\r\n";String twoHyphens = "--";String boundary = "*****";try {URL url = new URL(actionUrl);HttpURLConnection con = (HttpURLConnection) url.openConnection();/* 允许Input、Output，不使用Cache */con.setDoInput(true);con.setDoOutput(true);con.setUseCaches(false);/* 设置传送的method=POST */con.setRequestMethod("POST");/* setRequestProperty */con.setRequestProperty("Connection", "Keep-Alive");con.setRequestProperty("Charset", "UTF-8");con.setRequestProperty("Content-Type","multipart/form-data;boundary=" + boundary);/* 设置DataOutputStream */DataOutputStream ds = new DataOutputStream(con.getOutputStream());ds.writeBytes(twoHyphens + boundary + end);ds.writeBytes("Content-Disposition: form-data; "+ "name=\"GooddShip\";filename=\"" + uploadFile + "\"" + end);ds.writeBytes(end);/* 取得文件的FileInputStream */FileInputStream fStream = new FileInputStream(uploadFile);/* 设置每次写入1024bytes */int bufferSize = 1024;byte[] buffer = new byte[bufferSize];int length = -1;/* 从文件读取数据至缓冲区 */while ((length = fStream.read(buffer)) != -1) {/* 将资料写入DataOutputStream中 */ds.write(buffer, 0, length);}ds.writeBytes(end);ds.writeBytes(twoHyphens + boundary + twoHyphens + end);/* close streams */fStream.close();ds.flush();/* 取得Response内容 */InputStream is = con.getInputStream();int ch;StringBuffer b = new StringBuffer();while ((ch = is.read()) != -1) {b.append((char) ch);}/* Parse JSON */JSONObject jObject = new JSONObject(b.toString());int code = jObject.getInt("Code");String error = jObject.getString("Error");String msg = jObject.getString("msg");if (code == 1) {/* 将Response显示于Dialog */result = "上传成功";} else result = "上传失败" + error;/* 关闭DataOutputStream */ds.close();} catch (Exception e) {result = "上传失败" + e;}}

然后就可以了，我们最终的效果如下。

如果你有更好的方法，欢迎交流。