android - 尝试将带有图像的表单发送到 PHP 服务器时 Android 中的内存泄漏

Question

我在这个文件中有内存泄漏，我找不到确切位置，但我认为是周围的图像 --> (Bitmap bm = BitmapFactory.decodeFile(filename))，我试过了许多不同的方法，但我无法让它工作。

package prod.vegs;

//All imports here but not need to write them all now :-)


public class ProductForm extends Activity {

private static int TAKE_PICTURE = 1;
private static int SELECT_PICTURE = 2;

//JSON Response node names
private static String KEY_SUCCESS = "success";
private static String ERROR_MSG = "error_msg";
private static String KEY_TYPES = "subtypes";
private static String TYPE_NAME = "name";
private static String TYPE_ID = "id_type";
private static String PRODUCT_ID = "id_product";

private JSONObject json;
private JSONParser jsonParser;
private String barcodeStr;
private String filename;
private int code;
private ProgressDialog dialog;
private TypeClass[] items;
private TypeClass[] sub_items;

//Declare assets objects
Spinner type;
Spinner subtype;
TextView errorMsg;
TextView description;
TextView name;
Button camera;
Button gallery;
Intent intent;
ImageView preview;
Bundle bundle;
LinearLayout errorMsgContainer;

Context context;

public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.product_form);
    context = this;

    Bundle b = getIntent().getExtras();
    barcodeStr = b.getString("barcode");

    jsonParser = new JSONParser();
    dialog = new ProgressDialog(this);
    dialog.setMessage(getString(R.string.loading));
    dialog.setTitle(getString(R.string.progress));
    dialog.setCancelable(true);

    //Set assets
    name = (TextView) findViewById(R.id.productName);
    description = (TextView) findViewById(R.id.productDescription);
    errorMsg = (TextView) findViewById(R.id.error_msg);
    errorMsgContainer = (LinearLayout) findViewById(R.id.error_msg_container);
    type = (Spinner) findViewById(R.id.productParentType);
    subtype = (Spinner) findViewById(R.id.productType);
    camera = (Button) findViewById(R.id.productCamera);
    gallery = (Button) findViewById(R.id.productGallery);
    preview = (ImageView) findViewById(R.id.productPreview);
    filename = Environment.getExternalStorageDirectory() + String.format(getString(R.string.api_product_form_picture_file), barcodeStr);

    Boolean fromScanner = b.getBoolean("scanner");
    if (fromScanner == true) {

        AlertDialog.Builder alertbox = new AlertDialog.Builder(this);
        alertbox.setMessage(getString(R.string.insert_product));
        alertbox.setPositiveButton(getString(R.string.yes), 
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface arg_1, int arg_num) {
                    final Functions function = new Functions();
                    List<NameValuePair> params = new ArrayList<NameValuePair>();
                    String url = String.format(getString(R.string.api_product_form_types_url), getString(R.string.api_url));
                    json = function.loadJSONUrl(url, params);
                    if(json != null){
                        try {
                            if (json.getString(KEY_SUCCESS) != null) {
                                String res = json.getString(KEY_SUCCESS);
                                if(Integer.parseInt(res) == 1){

                                    JSONArray types = json.getJSONArray(KEY_TYPES);
                                    items = convertJSONArray(types);

                                    SpinAdapter listViewArrayAdapter = new SpinAdapter(context, android.R.layout.simple_spinner_item, items);
                                    listViewArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
                                    type.setAdapter(listViewArrayAdapter);
                                    type.setOnItemSelectedListener(new OnItemSelectedListener(){
                                        public void onItemSelected(AdapterView<?> parent, View v, int pos, long id) {
                                            try {
                                                String url = String.format(getString(R.string.api_subtypes_id_url), getString(R.string.api_url), ((TypeClass) type.getSelectedItem()).getId());
                                                List<NameValuePair> params = new ArrayList<NameValuePair>();
                                                JSONObject json_subtypes = function.loadJSONUrl(url, params);
                                                if (json_subtypes.getString(KEY_SUCCESS) != null) {
                                                    JSONArray subtypes = json_subtypes.getJSONArray(KEY_TYPES);
                                                    sub_items = convertJSONArray(subtypes);
                                                    SpinAdapter subTypeAdapter = new SpinAdapter(context, android.R.layout.simple_spinner_item, sub_items);
                                                    subTypeAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
                                                    subtype.setAdapter(subTypeAdapter);
                                                    subtype.setPrompt("Selecciona la cateogría");
                                                }
                                            } catch (Exception e) {
                                                e.printStackTrace();
                                            }
                                        }

                                        public void onNothingSelected(AdapterView<?> args) {
                                            //Auto-generated method stub
                                        }
                                    });
                                    type.setPrompt("Selecciona la cateogría");

                                    //camera action
                                    camera.setOnClickListener(new View.OnClickListener() {
                                        public void onClick(View view) {
                                            intent =  new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                                            int timeMili = (int) (System.currentTimeMillis());
                                            filename = Environment.getExternalStorageDirectory() + "/" + timeMili + ".jpg";
                                            Uri output = Uri.fromFile(new File(filename));
                                            intent.putExtra(MediaStore.EXTRA_OUTPUT, output);
                                            code = TAKE_PICTURE;
                                            startActivityForResult(intent, code);   
                                        }
                                    });

                                    //gallery action
                                    gallery.setOnClickListener(new View.OnClickListener() {
                                        public void onClick(View view) {
                                            intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI);
                                            code = SELECT_PICTURE;
                                            startActivityForResult(intent, code);
                                        }
                                    });

                                    //button of the form
                                    Button button = (Button) findViewById(R.id.button);
                                    button.setOnClickListener(new View.OnClickListener() {
                                        public void onClick(View view) {
                                            if (!NetworkHelper.CheckNetworkStatus(view.getContext())) {
                                                return;
                                            }
                                            bundle = new Bundle();
                                            bundle.putString("barcode", barcodeStr.toString());
                                            bundle.putString("name", name.getText().toString());
                                            bundle.putString("description", description.getText().toString());
                                            bundle.putString("type_id", ((TypeClass) subtype.getSelectedItem()).getId());

                                            if (_checkFormValues()) {
                                                new SendDataJSON().execute(view);
                                            } else {
                                                Toast.makeText( view.getContext(), getString(R.string.error_form_incomplete), Toast.LENGTH_LONG).show();
                                            }
                                        }
                                    });

                                }  else {
                                    errorMsg.setText(json.getString(ERROR_MSG));
                                    errorMsgContainer.setVisibility(LinearLayout.VISIBLE);
                                }
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    } else {

                    }
                }
        }).setNegativeButton("No", 
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface arg0, int arg1) {
                    Intent myIntent = new Intent(ProductForm.this, CaptureActivity.class);
                    startActivity(myIntent);
                    finish();
                }
        }).show();

    } else {
        finish();
    }  

}

class SendDataJSON extends AsyncTask<View, Void, View>{

    @Override
    protected View doInBackground(View... views) {

        String url = String.format(getString(R.string.api_product_form_url),getString(R.string.api_url)); 
        HttpPost httpPost = new HttpPost(url);

        try {
            // Add your data
            MultipartEntity entity = new MultipartEntity();

            File photo = new File(filename);
            if (photo.exists()) {
                //create the compressed image to send                   
                //create the file to send the image
                File sd = Environment.getExternalStorageDirectory();
                File data = Environment.getDataDirectory();
                if (!sd.canWrite()) { sd = data; }
                String destinationFolderPath = sd + "/" + getString(R.string.app_dir) + "/";
                String destinationImageName= "photo_" + bundle.getString("barcode") + ".jpg";

                //create the folder to store it
                File destinationFolder = new File(destinationFolderPath);
                if (!destinationFolder.exists()) {
                    destinationFolder.mkdirs();
                }

                File destination = new File(destinationFolder, destinationImageName);
                FileOutputStream out = new FileOutputStream(destination);

                Bitmap bm = BitmapFactory.decodeFile(filename);                 
                int width = bm.getWidth();
                int height = bm.getHeight();
                int max_value = 1024;
                int max = Math.max(width,height);
                if (max > max_value) {
                    width = width * max_value / max;
                    height = height * max_value / max;
                }

                //Make the new image with the new size values
                try {
                    Bitmap bm2 = Bitmap.createScaledBitmap(bm, width, height, true);
                    //Compress the image
                    bm2.compress(CompressFormat.JPEG, 75, out);                     
                    out.flush();
                    out.close();                        
                    destination = new File(destinationFolder, destinationImageName);                        
                    FileBody filePhoto = new FileBody(destination);
                    entity.addPart("image", filePhoto);
                } catch (Exception e) {
                    Log.w(ProductForm.class.getSimpleName(), e);
                }

            }
            SharedPreferences userSettings = getSharedPreferences("UserPreferences", Context.MODE_PRIVATE); 
            Charset chars = Charset.forName("UTF-8");
            entity.addPart("barcode", new StringBody(bundle.getString("barcode"),chars));
            entity.addPart("name", new StringBody(bundle.getString("name"),chars));
            entity.addPart("description", new StringBody(bundle.getString("description"),chars));
            entity.addPart("id_type", new StringBody(bundle.getString("type_id")));
            entity.addPart("uid",new StringBody(userSettings.getString("uid", ""),chars));
            httpPost.setEntity(entity);
            HttpClient httpclient = new DefaultHttpClient();
            httpclient.execute(httpPost);

        } catch (IOException e) {
            //
        }

        return views[0];
    }

    @Override
    protected void onPreExecute() {
        dialog.setMax(100);
        dialog.setProgress(0);
        dialog.show();
    }

    @Override
    protected void onPostExecute(View view) {
        //redirect to the product page          
        setContentView(R.layout.product_barcode);           
        String url = String.format(getString(R.string.api_product_barcode_url), getString(R.string.api_url), bundle.getString("barcode"));  
        new LoadJSONBarcode().execute(url);
    }
}

//Send data to server and receive respond
private class LoadJSONBarcode extends AsyncTask<String, Void, JSONObject>{

    @Override
    protected JSONObject doInBackground(String... urls) {
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        json = new JSONObject();
        json = jsonParser.getJSONFromUrl(urls[0], params);
        return json;
    }

    @Override
    protected void onPreExecute() {
        dialog.setMax(100);
        dialog.setProgress(0);
        dialog.show();
    }

    @Override
    protected void onPostExecute(JSONObject json) {

        if (json != null) {
            try {

                if (json.getString(KEY_SUCCESS) != null) {
                    String res = json.getString(KEY_SUCCESS);
                    if(Integer.parseInt(res) == 1){
                        View view = findViewById(R.id.productBarcodeXML);                       
                        Intent myIntent = new Intent(view.getContext(), Product.class);
                        Bundle b = new Bundle();
                        b.putString("id", json.getString(PRODUCT_ID));
                        myIntent.putExtras(b);
                        view.getContext().startActivity(myIntent);
                    } else {
                        errorMsg.setText(json.getString(ERROR_MSG));
                        errorMsgContainer.setVisibility(LinearLayout.VISIBLE);
                    }
                    dialog.dismiss();
                }

            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == TAKE_PICTURE) {
        if (data != null) {
            if (data.hasExtra("data")) { 
                preview.setImageBitmap((Bitmap) data.getParcelableExtra("data"));
                preview.setVisibility(ImageView.VISIBLE);
            }
        } else {
            preview.setImageBitmap(BitmapFactory.decodeFile(filename));
            preview.setVisibility(ImageView.VISIBLE);
            new MediaScannerConnectionClient() {
                private MediaScannerConnection msc = null; {
                    msc = new MediaScannerConnection(getApplicationContext(), this); msc.connect();
                }
                public void onMediaScannerConnected() { 
                    msc.scanFile(filename, null);
                }
                public void onScanCompleted(String path, Uri uri) { 
                    msc.disconnect();
                } 
            };              
        }
    } else if (requestCode == SELECT_PICTURE){
        if (data != null){ 
            Uri selectedImage = data.getData();
            InputStream is;
            String[] filePathColumn = {MediaStore.Images.Media.DATA};
            Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
            cursor.moveToFirst();

            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            filename = cursor.getString(columnIndex);
            cursor.close();

            try {
                is = getContentResolver().openInputStream(selectedImage);
                BufferedInputStream bis = new BufferedInputStream(is);
                Bitmap bitmap = BitmapFactory.decodeStream(bis);            
                preview.setImageBitmap(bitmap);     
                preview.setVisibility(ImageView.VISIBLE);
            } catch (FileNotFoundException e) {

            }
        }
    } 
}

private TypeClass[] convertJSONArray(JSONArray jsonArray){
    int len = jsonArray.length();
    TypeClass[] t = new TypeClass[len];
    if (jsonArray != null) { 
        for (int i=0;i<len;i++){ 
            try {
                JSONObject o = jsonArray.getJSONObject(i);
                t[i] = new TypeClass();
                t[i].setName(o.getString(TYPE_NAME));
                t[i].setId(o.getString(TYPE_ID));
            } catch (JSONException e) {
                e.printStackTrace();
            }
       } 
    } 
    return t;
}

protected boolean _checkFormValues() {

    boolean result = true;

    if (name.getText().length() == 0) {
        name.requestFocus();
        result = false;
    }
    if (((TypeClass) subtype.getSelectedItem()).getId() == null){
        subtype.requestFocus();
        result = false;
    }
    return result;
}

}

错误日志

11-07 23:55:26.914: E/AndroidRuntime(15457): FATAL EXCEPTION: AsyncTask #3
11-07 23:55:26.914: E/AndroidRuntime(15457): java.lang.RuntimeException: An error occured while executing doInBackground()
11-07 23:55:26.914: E/AndroidRuntime(15457):    at android.os.AsyncTask$3.done(AsyncTask.java:278)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at java.lang.Thread.run(Thread.java:864)
11-07 23:55:26.914: E/AndroidRuntime(15457): Caused by: java.lang.OutOfMemoryError: (Heap Size=35491KB, Allocated=27993KB)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at android.graphics.BitmapFactory.nativeDecodeFile(Native Method)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:373)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:443)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at prod.vegs.ProductForm$SendDataJSON.doInBackground(ProductForm.java:272)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at prod.vegs.ProductForm$SendDataJSON.doInBackground(ProductForm.java:1)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at android.os.AsyncTask$2.call(AsyncTask.java:264)
11-07 23:55:26.914: E/AndroidRuntime(15457):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
11-07 23:55:26.914: E/AndroidRuntime(15457):    ... 4 more

Answer 1

位图是非常大的内存消耗者。将两个加载到内存中可能是个大问题。您应该考虑使用 BitmapFactory.Options当你解码一个新的位图时。此外，您不需要 bm2。相反，将该行替换为:

bm = Bitmap.createScaledBitmap(bm, width, height, true);

最后，如果没有其他选择，您可以使用 AndroidManifest.xml 中的应用程序属性 android:largeHeap="true" 来增加应用程序的堆大小。不需要此选项 - 并且仅应考虑用于极其图形密集的应用程序。

编辑

您可能会发现另一个有助于优化位图使用的链接:http://developer.android.com/training/tv/optimizing-layouts-tv.html#HandleLargeBitmaps