Android上使用camera拍照，把获取的照片上传到远程服务器

使用Java上传文件

从Apache Software Foundation下载HttpClient 4.3.4。

在工程中添加下面的jar包：

参考sample，写一个简单的上传：

public static void main(String[] args) throws Exception {        // TODO Auto-generated method stub        CloseableHttpClient httpclient = HttpClients.createDefault();        try {            HttpPost httppost = new HttpPost("http://localhost:8003/savetofile.php"); // your server             FileBody bin = new FileBody(new File("my.jpg")); // image for uploading             HttpEntity reqEntity = MultipartEntityBuilder.create()                    .addPart("myFile", bin)                    .build();             httppost.setEntity(reqEntity);             System.out.println("executing request " + httppost.getRequestLine());            CloseableHttpResponse response = httpclient.execute(httppost);            try {                System.out.println("----------------------------------------");                System.out.println(response.getStatusLine());                HttpEntity resEntity = response.getEntity();                if (resEntity != null) {                    System.out.println("Response content length: " + resEntity.getContentLength());                }                EntityUtils.consume(resEntity);            } finally {                response.close();            }        } finally {            httpclient.close();        }    }

Android上拍照

Camera的使用很简单，只需要参考开发者网站的这篇Taking Photos Simply。

调用系统camera只需要如下代码：

Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");startActivityForResult(intent, 0);

 

拍照之后，camera会返回缩略图：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {    if (requestCode == 0 && resultCode == RESULT_OK) {        Bundle extras = data.getExtras();        Bitmap imageBitmap = (Bitmap) extras.get("data");        mImageView.setImageBitmap(imageBitmap);    }}

 

如果要获得高质量的图，就需要指定照片的保存路径。在AndroidManifest.xml中添加下面的权限：

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

 

修改调用方法：

Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");Intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));startActivityForResult(intent, 0);

 

拍照之后，使用预设的图片路径解码，就可以获取高质量的图：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {        if (requestCode == 0 && resultCode == Activity.RESULT_OK) {            setPic();        }} private void setPic() {    // Get the dimensions of the View    int targetW = mImageView.getWidth();    int targetH = mImageView.getHeight();     // Get the dimensions of the bitmap    BitmapFactory.Options bmOptions = new BitmapFactory.Options();    bmOptions.inJustDecodeBounds = true;    BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);    int photoW = bmOptions.outWidth;    int photoH = bmOptions.outHeight;     // Determine how much to scale down the image    int scaleFactor = Math.min(photoW/targetW, photoH/targetH);     // Decode the image file into a Bitmap sized to fill the View    bmOptions.inJustDecodeBounds = false;    bmOptions.inSampleSize = scaleFactor;    bmOptions.inPurgeable = true;     Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);    mImageView.setImageBitmap(bitmap);}

 

从Android客户端传送图片到PHP服务器

要访问Internet，在AndroidManifest.xml中添加访问权限：

<uses-permission android:name="android.permission.INTERNET"/>

参考http://blog.rafaelsanches.com/2011/01/29/upload-using-multipart-post-using-httpclient-in-android/，创建一个类MultipartEntity：

public class MultipartEntity implements HttpEntity {     private String boundary = null;     ByteArrayOutputStream out = new ByteArrayOutputStream();    boolean isSetLast = false;    boolean isSetFirst = false;     public MultipartEntity() {        this.boundary = System.currentTimeMillis() + "";    }     public void writeFirstBoundaryIfNeeds(){        if(!isSetFirst){            try {                out.write(("--" + boundary + "\r\n").getBytes());            } catch (final IOException e) {             }        }        isSetFirst = true;    }     public void writeLastBoundaryIfNeeds() {        if(isSetLast){            return ;        }        try {            out.write(("\r\n--" + boundary + "--\r\n").getBytes());        } catch (final IOException e) {         }        isSetLast = true;    }     public void addPart(final String key, final String value) {        writeFirstBoundaryIfNeeds();        try {            out.write(("Content-Disposition: form-data; name=\"" +key+"\"\r\n").getBytes());            out.write("Content-Type: text/plain; charset=UTF-8\r\n".getBytes());            out.write("Content-Transfer-Encoding: 8bit\r\n\r\n".getBytes());            out.write(value.getBytes());            out.write(("\r\n--" + boundary + "\r\n").getBytes());        } catch (final IOException e) {         }    }     public void addPart(final String key, final String fileName, final InputStream fin){        addPart(key, fileName, fin, "application/octet-stream");    }     public void addPart(final String key, final String fileName, final InputStream fin, String type){        writeFirstBoundaryIfNeeds();        try {            type = "Content-Type: "+type+"\r\n";            out.write(("Content-Disposition: form-data; name=\""+ key+"\"; filename=\"" + fileName + "\"\r\n").getBytes());            out.write(type.getBytes());            out.write("Content-Transfer-Encoding: binary\r\n\r\n".getBytes());             final byte[] tmp = new byte[4096];            int l = 0;            while ((l = fin.read(tmp)) != -1) {                out.write(tmp, 0, l);            }            out.flush();        } catch (final IOException e) {         } finally {            try {                fin.close();            } catch (final IOException e) {             }        }    }     public void addPart(final String key, final File value) {        try {            addPart(key, value.getName(), new FileInputStream(value));        } catch (final FileNotFoundException e) {         }    }     @Override    public long getContentLength() {        writeLastBoundaryIfNeeds();        return out.toByteArray().length;    }     @Override    public Header getContentType() {        return new BasicHeader("Content-Type", "multipart/form-data; boundary=" + boundary);    }     @Override    public boolean isChunked() {        return false;    }     @Override    public boolean isRepeatable() {        return false;    }     @Override    public boolean isStreaming() {        return false;    }     @Override    public void writeTo(final OutputStream outstream) throws IOException {        outstream.write(out.toByteArray());    }     @Override    public Header getContentEncoding() {        return null;    }     @Override    public void consumeContent() throws IOException,    UnsupportedOperationException {        if (isStreaming()) {            throw new UnsupportedOperationException(            "Streaming entity does not implement #consumeContent()");        }    }     @Override    public InputStream getContent() throws IOException,    UnsupportedOperationException {        return new ByteArrayInputStream(out.toByteArray());    } }

 

使用AsyncTask来完成上传：

private class UploadTask extends AsyncTask<Bitmap, Void, Void> {         protected Void doInBackground(Bitmap... bitmaps) {            if (bitmaps[0] == null)                return null;             Bitmap bitmap = bitmaps[0];            ByteArrayOutputStream stream = new ByteArrayOutputStream();            bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream); // convert Bitmap to ByteArrayOutputStream            InputStream in = new ByteArrayInputStream(stream.toByteArray()); // convert ByteArrayOutputStream to ByteArrayInputStream             DefaultHttpClient httpclient = new DefaultHttpClient();            try {                HttpPost httppost = new HttpPost(                        "http://192.168.8.84:8003/savetofile.php"); // server                 MultipartEntity reqEntity = new MultipartEntity();                reqEntity.addPart("myFile",                        System.currentTimeMillis() + ".jpg", in);                httppost.setEntity(reqEntity);                 Log.i(TAG, "request " + httppost.getRequestLine());                HttpResponse response = null;                try {                    response = httpclient.execute(httppost);                } catch (ClientProtocolException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }                try {                    if (response != null)                        Log.i(TAG, "response " + response.getStatusLine().toString());                } finally {                 }            } finally {             }             if (in != null) {                try {                    in.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }             if (stream != null) {                try {                    stream.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }             return null;        }         @Override        protected void onPostExecute(Void result) {            // TODO Auto-generated method stub            super.onPostExecute(result);            Toast.makeText(MainActivity.this, R.string.uploaded, Toast.LENGTH_LONG).show();        }    }

代码

https://github.com/DynamsoftRD/JavaHTTPUpload