發送圖像到服務器需要很多時間

Question

在我的Android應用程序中，我試圖將拍攝的圖像從相機發送到我的PHP服務器。 有時圖像被成功發送到服務器或有時發送到服務器失敗。我認爲圖像不發送到服務器，因爲它花費很多時間。那麼，我如何解決這個問題，請指導我。我附上完整的源代碼。

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(); 
     } 



    } 
} 

這裏是清單文件 公共類MainActivity擴展活動{

// 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(); 
    } 



} 

} 這裏是清單文件

<?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> 

這裏是ServeSide代碼

<?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

我的建議是使用

HttpURLConnection的

上傳，只是作爲一個例子對下面的代碼的外觀和嘗試，並進行相應的修改。

Uploading files to HTTP server using POST on Android.使用多

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