JSONパーサーを作成するときに "OutOfMemoryError：java heap space"を修正する方法

Question

http protocol.iを使用してJSONオブジェクトから情報を送信したいと思っています。

UNEXPECTED TOP-LEVEL ERROR: 
java.lang.OutOfMemoryError: Java heap space 
    at java.util.Arrays.copyOf(Arrays.java:2271) 
    at java.io.ByteArrayOutputStream.toByteArray(ByteArrayOutputStream.java:178) 
    at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:279) 
    at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166) 
    at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144) 
    at com.android.dx.command.dexer.Main.processOne(Main.java:672) 
    at com.android.dx.command.dexer.Main.processAllFiles(Main.java:569) 
    at com.android.dx.command.dexer.Main.runMultiDex(Main.java:366) 
    at com.android.dx.command.dexer.Main.run(Main.java:275) 
    at com.android.dx.command.dexer.Main.main(Main.java:245) 
    at com.android.dx.command.Main.main(Main.java:106) 

FAILED 

FAILURE: Build failed with an exception. 

* What went wrong: 
Execution failed for task ':app:dexDebug'. 
> com.android.ide.common.internal.LoggedErrorException: Failed to run command: 
    C:\Users\Koli\AppData\Local\Android\sdk\build-tools\23.0.0\dx.bat --dex --no-optimize --multi-dex --main-dex-list D:\Android\MedApp\app\build\intermediates\multi-dex\debug\maindexlist.txt --output D:\Android\MedApp\app\build\intermediates\dex\debug --input-list=D:\Android\MedApp\app\build\intermediates\tmp\dex\debug\inputList.txt 
Error Code: 
    3 
Output: 

    UNEXPECTED TOP-LEVEL ERROR: 
    java.lang.OutOfMemoryError: Java heap space 
     at java.util.Arrays.copyOf(Arrays.java:2271) 
     at java.io.ByteArrayOutputStream.toByteArray(ByteArrayOutputStream.java:178) 
     at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:279) 
     at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166) 
     at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144) 
     at com.android.dx.command.dexer.Main.processOne(Main.java:672) 
     at com.android.dx.command.dexer.Main.processAllFiles(Main.java:569) 
     at com.android.dx.command.dexer.Main.runMultiDex(Main.java:366) 
     at com.android.dx.command.dexer.Main.run(Main.java:275) 
     at com.android.dx.command.dexer.Main.main(Main.java:245) 
     at com.android.dx.command.Main.main(Main.java:106) 


* Try: 
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. 

これはこれはこれはこれは私のJOSNSenderクラス

ある

package com.knitechs.www.medapp.Transactors; 

import android.content.Context; 

import com.knitechs.www.medapp.actors.Patient; 
import com.knitechs.www.medapp.core.JSONSender; 
import com.knitechs.www.medapp.core.PDialog; 

import java.util.HashMap; 

/** 
* Created by Koli on 
*/ 
public class PatientDetailsSender extends JSONSender { 

    Patient patient; 
    String url; 
    HashMap<String,String> params; 
    String message; 

    public PatientDetailsSender(Patient patient,String url,Context context,String message,String successmessge){ 
     this.patient=patient; 
     super.setSender_url(url);     // set the send URL 
     super.setCurrentActivityContext(context); // set current context 
     this.message = message;      // set message for in process 
     super.setpDialog(new PDialog(super.getCurrentActivityContext(),message)); // ser process dialog 
     super.setSuccess_message(successmessge); // set success messge 
     setPatientDataToHashMap();  // set the hash map 
    } 

    public void execute(){ 
     executeQueryCreator(); 
    } 

    private void setPatientDataToHashMap(){ 

     params = new HashMap<>(); 

     params.put("REC_CODE",patient.getRecordCode()); 
     params.put("NAME",patient.getName()); 
     params.put("ADDRESS",patient.getAddress()); 
     params.put("GENDER",patient.getGender()); 
     params.put("GUARDIAN_NAME",patient.getGardianName()); 
     params.put("GUARDIAN_TP",patient.getGardianTelephone()); 
     params.put("B_DATE",patient.getBirthdateString()); 
     params.put("AGE",patient.getAgeString()); 
     params.put("TELEPHONE",patient.getTelephone()); 

    } 
} 

私PatientDetailsS​​enderクラスです

package com.knitechs.www.medapp; 

import android.os.Bundle; 
import android.support.v7.app.ActionBarActivity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.DatePicker; 
import android.widget.EditText; 
import android.widget.Spinner; 

import com.knitechs.www.medapp.Transactors.PatientDetailsSender; 
import com.knitechs.www.medapp.actors.Patient; 

import java.util.Calendar; 


public class PatientDetails extends ActionBarActivity { 

    Button cmdSave; 

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

     cmdSave = (Button)findViewById(R.id.cmdSave); 
     cmdSave.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 

       Patient pt = new Patient(); 
       pt.setRecordCode(((EditText) findViewById(R.id.txtPatientRecordCode)).getText().toString()); 
       pt.setName(((EditText) findViewById(R.id.txtFullName)).getText().toString()); 
       pt.setAddress(((EditText) findViewById(R.id.txtAddress)).getText().toString()); 
       pt.setTelephone(((EditText) findViewById(R.id.txtTelepphoneNumber)).getText().toString()); 
       pt.setGardianName(((EditText) findViewById(R.id.txtGardianName)).getText().toString()); 
       pt.setGardianTelephone(((EditText) findViewById(R.id.txtGardianContactNumber)).getText().toString()); 

       final Spinner sp = (Spinner)findViewById(R.id.spnGender); 
       pt.setGender(sp.getSelectedItem().toString()); 

       final DatePicker dob = (DatePicker) findViewById(R.id.dateDob); 
       Calendar cal = Calendar.getInstance(); 
       cal.set(dob.getYear(),dob.getMonth(),dob.getDayOfMonth()); 
       pt.setBirthdate(cal.getTime()); 


       PatientDetailsSender patientDetailsSender = new PatientDetailsSender(pt,"php/service_classes/PatientDetails.php",getApplicationContext(),"Processing","Details Saved"); 
       patientDetailsSender.execute(); 
      } 
     }); 
    } 


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_patient_details, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
} 

My活動である私のgradle.app

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 23 
    buildToolsVersion "23.0.0" 
    defaultConfig { 
     applicationId "com.knitechs.www.medapp" 
     minSdkVersion 15 
     targetSdkVersion 23 
     versionCode 1 
     versionName "1.0" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
    productFlavors { 
    } 

    packagingOptions { 
     exclude 'META-INF/DEPENDENCIES' 
     exclude 'META-INF/LICENSE' 
     exclude 'META-INF/LICENSE.txt' 
     exclude 'META-INF/license.txt' 
     exclude 'META-INF/NOTICE' 
     exclude 'META-INF/NOTICE.txt' 
     exclude 'META-INF/notice.txt' 
     exclude 'META-INF/ASL2.0' 
    } 

    defaultConfig { 
     multiDexEnabled = true 
    } 
} 

dependencies { 

    compile fileTree(dir: 'libs', include: ['*.jar']) 
    compile 'com.android.support:appcompat-v7:23.1.0' 
    compile 'com.google.android.gms:play-services:+' 
} 

です

public class JSONSender { 

    private static String sender_url ;    // sender URL 
    private ProgressDialog pDialog;     // process dialog for when executing 
    private Context currentActivityContext;    // current activity 
    private String success_message;     // success message when the dat inserted 
    private HashMap<String,String> parameters;  // map for data for json object 
    JSONParser jsonParser = new JSONParser();  // json parser 
    private static final String TAG_SUCCESS = "success"; 

    public static void setSender_url(String sender_url) { 
     JSONSender.sender_url = sender_url; 
    } 

    public void setpDialog(ProgressDialog pDialog) { 
     this.pDialog = pDialog; 
    } 

    public void setParameters(HashMap<String, String> parameters) { 
     this.parameters = parameters; 
    } 

    public void setSuccess_message(String success_message) { 
     this.success_message = success_message; 
    } 

    public void setCurrentActivityContext(Context currentActivityContext) { 
     this.currentActivityContext = currentActivityContext; 
    } 

    public Context getCurrentActivityContext() { 
     return currentActivityContext; 
    } 

    protected void executeQueryCreator(){ 
     new QueryCreator().execute(); 
    } 

    class QueryCreator extends AsyncTask<String, String, String> { 

     /** 
     * Before starting background thread Show Progress Dialog if it is having 
     * */ 
     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      if(!pDialog.equals(null)){ 
       pDialog.show(); 
      } 
     } 

     /** 
     * Do work in the save to datbse 
     * */ 
     protected String doInBackground(String... args) { 

      JSONObject json = jsonParser.makeHttpRequest(sender_url, "POST", parameters); // create the JSON object in parameters and send data 
      Log.d("Create Response", json.toString()); 

      /** 
      * check for success tag incomming 
      */ 
      try { 
       int success = json.getInt(TAG_SUCCESS); 
       if (success == 1) { 
        Log.d("Data Saved"," OK");  // data saved indatabase 
        if(!success_message.isEmpty()){ 
         Toast.makeText(getCurrentActivityContext(), success_message, Toast.LENGTH_SHORT).show(); 
        } 
       } else { 
        Log.d("Data Failed", " NO");  // Data failed 
        Toast.makeText(getCurrentActivityContext(),"Error",Toast.LENGTH_SHORT).show(); 
       } 
      } catch (JSONException e) { 
       e.printStackTrace(); 
      } 

      return null; 
     } 

     /** 
     * After completing background task Dismiss the progress dialog 
     * **/ 
     protected void onPostExecute(String file_url) { 
      // dismiss the dialog once done 
      if(!pDialog.equals(null)){ 
       pDialog.dismiss(); 
      } 
     } 

    } 
} 

これは私のJSONParserクラスです

package com.knitechs.www.medapp.core; 

import android.util.Log; 

import org.json.JSONException; 
import org.json.JSONObject; 

import java.io.BufferedInputStream; 
import java.io.BufferedReader; 
import java.io.DataOutputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.io.UnsupportedEncodingException; 
import java.net.HttpURLConnection; 
import java.net.URL; 
import java.net.URLEncoder; 
import java.util.HashMap; 

/** 
* Created by Koli on 
*/ 
public class JSONParser { 

    String charset = "UTF-8";  // character type 
    HttpURLConnection conn;   // HTTP connection 
    DataOutputStream wr;   // Data output stream for get out data from database 
    StringBuilder result;   // reciving data string 
    URL urlObj;      // URL object for the connection 
    JSONObject jObj = null;   // Json object for create Json parsers 
    StringBuilder sbParams;   // string for create parameter url 
    String paramsString;   // sending parameter url string 
    private String ipaddress ="http://192.168.8.100/"; //IP address of theserver 

    /** 
    * @param url_path url for the servenr php service class without the ip (folder/pages) 
    * @param method port or get method 
    * @param params json object parmeters 
    * @return JSON object returns with include HTTP URL 
    */ 

    public JSONObject makeHttpRequest(String url_path, String method, HashMap<String, String> params) { 

     sbParams = new StringBuilder();    // create new string for theparameters 
     int i = 0; 
     /** 
     * create the URL parameter string from key set and values 
     * key=value & key=value like that 
     */ 
     for (String key : params.keySet()) { 
      try { 
       if (i != 0) { 
        sbParams.append("&"); 
       } 
       sbParams.append(key).append("=") 
         .append(URLEncoder.encode(params.get(key), charset)); 

      } catch (UnsupportedEncodingException e) { 
       e.printStackTrace(); 
      } 
      i++; 
     } 

     /** 
     * create the connection URL 
     */ 

     String url = ipaddress + url_path ; 

     /** 
     * create the connection object byVal method 
     */ 

     if (method.equals("POST")) { 

      /** 
      * request port method 
      */ 

      try { 
       urlObj = new URL(url);         // create a URL object 
       conn = (HttpURLConnection) urlObj.openConnection();  // create a HTTP connection object from theURL object 
       conn.setDoOutput(true);         // set the method type as Output 
       conn.setRequestMethod("POST");       // Request method as POST 
       conn.setRequestProperty("Accept-Charset", charset);  // chrctor acceptance 
       conn.setReadTimeout(10000);        // readable timeout for reading 
       conn.setConnectTimeout(15000);       // connection time out for connect to server 
       conn.connect(); 

       paramsString = sbParams.toString();      // parameter string 

       wr = new DataOutputStream(conn.getOutputStream());  // write the output stream to the Dtoutput stream 
       wr.writeBytes(paramsString); 
       wr.flush(); 
       wr.close(); 

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

     } else if (method.equals("GET")) { 

      /** 
      * request get method 
      */ 

      if (sbParams.length() != 0) { 
       url += "?" + sbParams.toString(); // url ? key = val1 & key = val2 
      } 

      try { 
       urlObj = new URL(url);        // create a URL object 
       conn = (HttpURLConnection) urlObj.openConnection(); // create a HTTP connection object from theURL object 
       conn.setDoOutput(false);       // set the method type as Output 
       conn.setRequestMethod("GET");      // Request method as GET 
       conn.setRequestProperty("Accept-Charset", charset); // chrctor acceptance 
       conn.setConnectTimeout(15000);      // connection time out for connect to server 
       conn.connect(); 

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

     } 

     /** 
     * response comes from server for request message this is also as a data input stream,same connection c 
     */ 

     try { 
      InputStream in = new BufferedInputStream(conn.getInputStream());  // input strem 
      BufferedReader reader = new BufferedReader(new InputStreamReader(in)); // Buffer reader for the reader od connection statements,inpu string 
      result = new StringBuilder();           // respond message 
      String line; 
      /** 
      * append the lines in to single result string 
      */ 
      while ((line = reader.readLine()) != null) { 
       result.append(line); 
      } 

      Log.d("JSON Parser", "result: " + result.toString()); 

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

     conn.disconnect();   // disconnect the connection 

     /** 
     * parse the string to a json object 
     */ 

     try { 
      jObj = new JSONObject(result.toString()); 
     } catch (JSONException e) { 
      Log.e("JSON Parser", "Error parsing data " + e.toString()); 
     } 
     return jObj; // return json object 
    } 
} 

これは、私はこのエラーを取得し、なぜ私は混乱しています

package com.knitechs.www.medapp.core; 

import android.app.ProgressDialog; 
import android.content.Context; 

/** 
* Created by Koli on 
*/ 
public class PDialog extends ProgressDialog { 

    public PDialog(Context context) { 
     super(context); 
    } 

    public PDialog(Context context,String message){ 
     super(context); 
     super.setMessage(message); 
     super.setIndeterminate(false); 
    } 
} 

マイPDialogクラスです。私を助けてください。

Answer 1

アンドロイドプロジェクトのbuild.gradleファイルでjavamaxheapsizeを大きくすると、問題が解決する可能性があります。

android { 
    ... 
    dexOptions { 
     javaMaxHeapSize "4g" 
    } 
} 

詳細はこちらを参照してください。

Implementing MultiDex results in compiling for so long, and finally heap space error

Android Studio - How to increase Allocated Heap Size