php - 将图像发送到服务器需要很多时间

Question

在我的 android 应用程序中，我试图将捕获的图像从相机发送到我的 php 服务器。有时图像成功发送到服务器或有时发送到服务器失败。我认为图像没有发送到服务器，因为它需要很多时间。那么我该如何解决这个问题，请指导我。我在此处附上了完整的源代码。

public class MainActivity extends Activity {

    // Activity request codes
    private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
    private static final int CAMERA_CAPTURE_VIDEO_REQUEST_CODE = 200;
    public static final int MEDIA_TYPE_IMAGE = 1;
    public static final int MEDIA_TYPE_VIDEO = 2;
    Bitmap bitmap;
    ProgressDialog pd;
    InputStream is;
    // directory name to store captured images and videos
    private static final String IMAGE_DIRECTORY_NAME = "Hello Camera";

    private Uri fileUri; // file url to store image/video

    private ImageView imgPreview;
    private VideoView videoPreview;
    private Button btnCapturePicture, btnRecordVideo,upload;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imgPreview = (ImageView) findViewById(R.id.imgPreview);
        videoPreview = (VideoView) findViewById(R.id.videoPreview);
        btnCapturePicture = (Button)findViewById(R.id.btnCapturePicture);
        btnRecordVideo = (Button) findViewById(R.id.btnRecordVideo);
        upload=(Button)findViewById(R.id.upload);

        upload.setOnClickListener(new View.OnClickListener() 
        {

            @Override
            public void onClick(View v) 
            {
                // TODO Auto-generated method stub
                if(bitmap==null)
                {
                    Toast.makeText(getApplicationContext(), "Please Select Image",Toast.LENGTH_LONG).show();

                }
                else
                {
                    new ImageUpload().execute();
                }

            }
        });

        /*
         * Capture image button click event
         */
        btnCapturePicture.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // capture picture
                captureImage();
            }
        });

        /*
         * Record video button click event
         */
        btnRecordVideo.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // record video
                recordVideo();
            }
        });

        // Checking camera availability
        if (!isDeviceSupportCamera()) {
            Toast.makeText(getApplicationContext(),
                    "Sorry! Your device doesn't support camera",
                    Toast.LENGTH_LONG).show();
            // will close the app if the device does't have camera
            finish();
        }
    }

    /**
     * Checking device has camera hardware or not
     * */
    private boolean isDeviceSupportCamera() {
        if (getApplicationContext().getPackageManager().hasSystemFeature(
                PackageManager.FEATURE_CAMERA)) {
            // this device has a camera
            return true;
        } else {
            // no camera on this device
            return false;
        }
    }

    /*
     * Capturing Camera Image will lauch camera app requrest image capture
     */
    private void captureImage() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);

        intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

        // start the image capture Intent
        startActivityForResult(intent,CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
    }

    /*
     * Here we store the file url as it will be null after returning from camera
     * app
     */
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        // save file url in bundle as it will be null on scren orientation
        // changes
        outState.putParcelable("file_uri", fileUri);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);

        // get the file url
        fileUri = savedInstanceState.getParcelable("file_uri");
    }

    /*
     * Recording video
     */
    private void recordVideo() {
        Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

        fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO);

        // set video quality
        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY,1);

        intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file
                                                            // name

        // start the video capture Intent
        startActivityForResult(intent, CAMERA_CAPTURE_VIDEO_REQUEST_CODE);
    }

    /**
     * Receiving activity result method will be called after closing the camera
     * */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // if the result is capturing Image
        if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
            if (resultCode == RESULT_OK) {
                // successfully captured the image
                // display it in image view
                previewCapturedImage();
            } else if (resultCode == RESULT_CANCELED) {
                // user cancelled Image capture
                Toast.makeText(getApplicationContext(),
                        "User cancelled image capture", Toast.LENGTH_SHORT)
                        .show();
            } else {
                // failed to capture image
                Toast.makeText(getApplicationContext(),
                        "Sorry! Failed to capture image", Toast.LENGTH_SHORT)
                        .show();
            }
        } else if (requestCode == CAMERA_CAPTURE_VIDEO_REQUEST_CODE) {
            if (resultCode == RESULT_OK) {
                // video successfully recorded
                // preview the recorded video
                previewVideo();
            } else if (resultCode == RESULT_CANCELED) {
                // user cancelled recording
                Toast.makeText(getApplicationContext(),
                        "User cancelled video recording", Toast.LENGTH_SHORT)
                        .show();
            } else {
                // failed to record video
                Toast.makeText(getApplicationContext(),
                        "Sorry! Failed to record video", Toast.LENGTH_SHORT)
                        .show();
            }
        }
    }

    /*
     * Display image from a path to ImageView
     */
    private void previewCapturedImage() {
        try {
            // hide video preview
            videoPreview.setVisibility(View.GONE);

            imgPreview.setVisibility(View.VISIBLE);
            upload.setVisibility(View.VISIBLE);

            // bimatp factory
            BitmapFactory.Options options = new BitmapFactory.Options();

            // downsizing image as it throws OutOfMemory Exception for larger
            // images
            options.inSampleSize = 8;

            bitmap = BitmapFactory.decodeFile(fileUri.getPath(),
                    options);

            imgPreview.setImageBitmap(bitmap);
        } catch (NullPointerException e) {
            e.printStackTrace();
        }
    }

    /*
     * Previewing recorded video
     */
    private void previewVideo() {
        try {
            // hide image preview
            imgPreview.setVisibility(View.GONE);

            videoPreview.setVisibility(View.VISIBLE);
            videoPreview.setVideoPath(fileUri.getPath());
            // start playing
            videoPreview.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * ------------ Helper Methods ---------------------- 
     * */

    /*
     * Creating file uri to store image/video
     */
    public Uri getOutputMediaFileUri(int type) {
        return Uri.fromFile(getOutputMediaFile(type));
    }

    /*
     * returning image / video
     */
    private static File getOutputMediaFile(int type) {

        // External sdcard location
        File mediaStorageDir = new File(
                Environment
                        .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
                IMAGE_DIRECTORY_NAME);

        // Create the storage directory if it does not exist
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d(IMAGE_DIRECTORY_NAME, "Oops! Failed create "
                        + IMAGE_DIRECTORY_NAME + " directory");
                return null;
            }
        }

        // Create a media file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
                Locale.getDefault()).format(new Date());
        File mediaFile;
        if (type == MEDIA_TYPE_IMAGE) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator
                    + "IMG_" + timeStamp + ".jpg");
        } else if (type == MEDIA_TYPE_VIDEO) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator
                    + "VID_" + timeStamp + ".mp4");
        } else {
            return null;
        }

        return mediaFile;
    }

    public class ImageUpload extends AsyncTask<String, String,String>
    {
        @Override
        protected void onPreExecute() 
        {
            // TODO Auto-generated method stub
            super.onPreExecute();
            pd=new ProgressDialog(MainActivity.this);
            pd.setMessage("Please Wait Image is Uploading");
            pd.setCancelable(false);
            pd.show();


        }

        @Override
        protected String doInBackground(String... params) 
        {
            // TODO Auto-generated method stub
            ByteArrayOutputStream bao = new ByteArrayOutputStream();

            bitmap.compress(Bitmap.CompressFormat.JPEG, 90, bao);

            byte [] ba = bao.toByteArray();

            String ba1=Base64.encodeToString(ba,1);

            ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();

            nameValuePairs.add(new BasicNameValuePair("image",ba1));

            try
            {

            HttpClient httpclient = new DefaultHttpClient();

            HttpPost httppost = new HttpPost("http://192.168.1.86/camera/upload.php");

            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            HttpResponse response = httpclient.execute(httppost);

            HttpEntity entity = response.getEntity();

            is = entity.getContent();

            //Toast.makeText(SignUpActivity.this, "Joining Failed", Toast.LENGTH_SHORT).show();

            }
            catch(Exception e)
            {

            Log.e("log_tag", "Error in http connection "+e.toString());
            }

            return null;
        }

        @Override
        protected void onPostExecute(String result) 
        {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
            Toast.makeText(getApplicationContext(), "Image Successfully Uploaded",Toast.LENGTH_LONG).show();
            pd.dismiss();
        }



    }
}

这是 list 文件公共(public)类 MainActivity 扩展 Activity {

// Activity request codes
private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
private static final int CAMERA_CAPTURE_VIDEO_REQUEST_CODE = 200;
public static final int MEDIA_TYPE_IMAGE = 1;
public static final int MEDIA_TYPE_VIDEO = 2;
Bitmap bitmap;
ProgressDialog pd;
InputStream is;
// directory name to store captured images and videos
private static final String IMAGE_DIRECTORY_NAME = "Hello Camera";

private Uri fileUri; // file url to store image/video

private ImageView imgPreview;
private VideoView videoPreview;
private Button btnCapturePicture, btnRecordVideo,upload;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    imgPreview = (ImageView) findViewById(R.id.imgPreview);
    videoPreview = (VideoView) findViewById(R.id.videoPreview);
    btnCapturePicture = (Button)findViewById(R.id.btnCapturePicture);
    btnRecordVideo = (Button) findViewById(R.id.btnRecordVideo);
    upload=(Button)findViewById(R.id.upload);

    upload.setOnClickListener(new View.OnClickListener() 
    {

        @Override
        public void onClick(View v) 
        {
            // TODO Auto-generated method stub
            if(bitmap==null)
            {
                Toast.makeText(getApplicationContext(), "Please Select Image",Toast.LENGTH_LONG).show();

            }
            else
            {
                new ImageUpload().execute();
            }

        }
    });

    /*
     * Capture image button click event
     */
    btnCapturePicture.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // capture picture
            captureImage();
        }
    });

    /*
     * Record video button click event
     */
    btnRecordVideo.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // record video
            recordVideo();
        }
    });

    // Checking camera availability
    if (!isDeviceSupportCamera()) {
        Toast.makeText(getApplicationContext(),
                "Sorry! Your device doesn't support camera",
                Toast.LENGTH_LONG).show();
        // will close the app if the device does't have camera
        finish();
    }
}

/**
 * Checking device has camera hardware or not
 * */
private boolean isDeviceSupportCamera() {
    if (getApplicationContext().getPackageManager().hasSystemFeature(
            PackageManager.FEATURE_CAMERA)) {
        // this device has a camera
        return true;
    } else {
        // no camera on this device
        return false;
    }
}

/*
 * Capturing Camera Image will lauch camera app requrest image capture
 */
private void captureImage() {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

    // start the image capture Intent
    startActivityForResult(intent,CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
}

/*
 * Here we store the file url as it will be null after returning from camera
 * app
 */
@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);

    // save file url in bundle as it will be null on scren orientation
    // changes
    outState.putParcelable("file_uri", fileUri);
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);

    // get the file url
    fileUri = savedInstanceState.getParcelable("file_uri");
}

/*
 * Recording video
 */
private void recordVideo() {
    Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO);

    // set video quality
    intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY,1);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file
                                                        // name

    // start the video capture Intent
    startActivityForResult(intent, CAMERA_CAPTURE_VIDEO_REQUEST_CODE);
}

/**
 * Receiving activity result method will be called after closing the camera
 * */
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // if the result is capturing Image
    if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            // successfully captured the image
            // display it in image view
            previewCapturedImage();
        } else if (resultCode == RESULT_CANCELED) {
            // user cancelled Image capture
            Toast.makeText(getApplicationContext(),
                    "User cancelled image capture", Toast.LENGTH_SHORT)
                    .show();
        } else {
            // failed to capture image
            Toast.makeText(getApplicationContext(),
                    "Sorry! Failed to capture image", Toast.LENGTH_SHORT)
                    .show();
        }
    } else if (requestCode == CAMERA_CAPTURE_VIDEO_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            // video successfully recorded
            // preview the recorded video
            previewVideo();
        } else if (resultCode == RESULT_CANCELED) {
            // user cancelled recording
            Toast.makeText(getApplicationContext(),
                    "User cancelled video recording", Toast.LENGTH_SHORT)
                    .show();
        } else {
            // failed to record video
            Toast.makeText(getApplicationContext(),
                    "Sorry! Failed to record video", Toast.LENGTH_SHORT)
                    .show();
        }
    }
}

/*
 * Display image from a path to ImageView
 */
private void previewCapturedImage() {
    try {
        // hide video preview
        videoPreview.setVisibility(View.GONE);

        imgPreview.setVisibility(View.VISIBLE);
        upload.setVisibility(View.VISIBLE);

        // bimatp factory
        BitmapFactory.Options options = new BitmapFactory.Options();

        // downsizing image as it throws OutOfMemory Exception for larger
        // images
        options.inSampleSize = 8;

        bitmap = BitmapFactory.decodeFile(fileUri.getPath(),
                options);

        imgPreview.setImageBitmap(bitmap);
    } catch (NullPointerException e) {
        e.printStackTrace();
    }
}

/*
 * Previewing recorded video
 */
private void previewVideo() {
    try {
        // hide image preview
        imgPreview.setVisibility(View.GONE);

        videoPreview.setVisibility(View.VISIBLE);
        videoPreview.setVideoPath(fileUri.getPath());
        // start playing
        videoPreview.start();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

/**
 * ------------ Helper Methods ---------------------- 
 * */

/*
 * Creating file uri to store image/video
 */
public Uri getOutputMediaFileUri(int type) {
    return Uri.fromFile(getOutputMediaFile(type));
}

/*
 * returning image / video
 */
private static File getOutputMediaFile(int type) {

    // External sdcard location
    File mediaStorageDir = new File(
            Environment
                    .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
            IMAGE_DIRECTORY_NAME);

    // Create the storage directory if it does not exist
    if (!mediaStorageDir.exists()) {
        if (!mediaStorageDir.mkdirs()) {
            Log.d(IMAGE_DIRECTORY_NAME, "Oops! Failed create "
                    + IMAGE_DIRECTORY_NAME + " directory");
            return null;
        }
    }

    // Create a media file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
            Locale.getDefault()).format(new Date());
    File mediaFile;
    if (type == MEDIA_TYPE_IMAGE) {
        mediaFile = new File(mediaStorageDir.getPath() + File.separator
                + "IMG_" + timeStamp + ".jpg");
    } else if (type == MEDIA_TYPE_VIDEO) {
        mediaFile = new File(mediaStorageDir.getPath() + File.separator
                + "VID_" + timeStamp + ".mp4");
    } else {
        return null;
    }

    return mediaFile;
}

public class ImageUpload extends AsyncTask<String, String,String>
{
    @Override
    protected void onPreExecute() 
    {
        // TODO Auto-generated method stub
        super.onPreExecute();
        pd=new ProgressDialog(MainActivity.this);
        pd.setMessage("Please Wait Image is Uploading");
        pd.setCancelable(false);
        pd.show();


    }

    @Override
    protected String doInBackground(String... params) 
    {
        // TODO Auto-generated method stub
        ByteArrayOutputStream bao = new ByteArrayOutputStream();

        bitmap.compress(Bitmap.CompressFormat.JPEG, 90, bao);

        byte [] ba = bao.toByteArray();

        String ba1=Base64.encodeToString(ba,1);

        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();

        nameValuePairs.add(new BasicNameValuePair("image",ba1));

        try
        {

        HttpClient httpclient = new DefaultHttpClient();

        HttpPost httppost = new HttpPost("http://192.168.1.86/camera/upload.php");

        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

        HttpResponse response = httpclient.execute(httppost);

        HttpEntity entity = response.getEntity();

        is = entity.getContent();

        //Toast.makeText(SignUpActivity.this, "Joining Failed", Toast.LENGTH_SHORT).show();

        }
        catch(Exception e)
        {

        Log.e("log_tag", "Error in http connection "+e.toString());
        }

        return null;
    }

    @Override
    protected void onPostExecute(String result) 
    {
        // TODO Auto-generated method stub
        super.onPostExecute(result);
        Toast.makeText(getApplicationContext(), "Image Successfully Uploaded",Toast.LENGTH_LONG).show();
        pd.dismiss();
    }



}

}这是 list 文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="info.androidhive.androidcameraapi"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <!-- Accessing camera hardware -->
    <uses-feature android:name="android.hardware.camera" />

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

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="info.androidhive.androidcameraapi.MainActivity"
            android:label="@string/app_name"
            android:configChanges="orientation|keyboard|keyboardHidden"
            android:screenOrientation="landscape">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest> 

这是服务端代码

<?php
$base=$_REQUEST['image'];
$binary=base64_decode($base);
header('Content-Type: bitmap; charset=utf-8');
$file = fopen('uploaded_image.jpg', 'wb');
fwrite($file, $binary);
fclose($file);
echo 'Image upload complete!!, Please check your php file directory……';?>

Answer 1

我的建议是使用

HttpURLConnection

上传，只是作为一个例子看看下面的代码并尝试相应地修改。

Uploading files to HTTP server using POST on Android.

http://androidexample.com/Upload_File_To_Server_-_Android_Example/index.php?view=article_discription&aid=83&aaid=106