Android上使用camera拍照,把获取的照片上传到远程服务器

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Android上使用camera拍照,把获取的照片上传到远程服务器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

Apache Software Foundation下载HttpClient 4.3.4。

在工程中添加下面的jar包:

Android上使用camera拍照,把获取的照片上传到远程服务器

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

Git clone https://github.com/DynamsoftRD/JavaHTTPUpload.git

 

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