Comment gérer OutOfMemoryError dans Android?

Question

je convertir la vidéo au format base64 de cette façon:

if (requestCode == VIDEO_REQ) { 
    Uri vid = data.getData(); 
    String videoPath = getRealPathFromURI(vid); 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    FileInputStream fis = null; 

    try { 
     fis = new FileInputStream(new File(videoPath)); 
    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    } 
    byte[] buf = new byte[1024]; 
    int n; 
    try { 
     while (-1 != (n = fis.read(buf))) 
      baos.write(buf, 0, n); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    byte[] videoBytes = baos.toByteArray(); 
    String test = Base64.encodeBytes(videoBytes); 
    JSONParsingXML jsonp=new JSONParsingXML(); 
    try { 
     jsonp.imageUpload(test); 
    } catch (JSONException e) { 
     e.printStackTrace(); 
    } 
} 

Je Recopiez le code de service comme la façon suivante:

public JSONObject imageUpload(String userid,String deviceid,String sessionid,String image){ 
    JSONObject jsonResponse =null; 
    HttpClient httpclient = new DefaultHttpClient(); 
    HttpPost httppost = new HttpPost("some url/"); 
    try { 
     // Add your data 
     List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(4); 
     nameValuePairs.add(new BasicNameValuePair("userid",userid)); 
     nameValuePairs.add(new BasicNameValuePair("deviceid", deviceid)); 
     nameValuePairs.add(new BasicNameValuePair("sessionkey",sessionid)); 
     nameValuePairs.add(new BasicNameValuePair("imagebase64", image)); 
     nameValuePairs.add(new BasicNameValuePair("type", "video")); 
     httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
     // Execute HTTP Post Request 
     System.out.println(httppost); 
     HttpResponse response = httpclient.execute(httppost); 
     HttpEntity responseEntity = response.getEntity();//An entity that can be sent or received with an HTTP message. Entities can be found in some requests and in responses, where they are optional. 
     String changeTIDRec = EntityUtils.toString(responseEntity); 
     System.out.println(changeTIDRec); 
     Log.v("responseEntity",""+responseEntity); 
     jsonResponse = new JSONObject(changeTIDRec);//insert the response value into JSONObject.  
     Log.v("jsonResponse",""+jsonResponse); 
    } catch (ClientProtocolException e) { 
     // TODO Auto-generated catch block 
    } catch (IOException e) { 
     // TODO Auto-generated catch block 
    } catch(Exception e){ 

    } 

     return jsonResponse; 
} 

J'ai reçu le message d'erreur comme

09-22 18:16:05.093: ERROR/AndroidRuntime(5455): FATAL EXCEPTION: main 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455): java.lang.OutOfMemoryError 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:97) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:144) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at java.lang.StringBuffer.append(StringBuffer.java:126) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at java.net.URLEncoder.encode(URLEncoder.java:111) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at org.apache.http.client.utils.URLEncodedUtils.encode(URLEncodedUtils.java:184) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at org.apache.http.client.utils.URLEncodedUtils.format(URLEncodedUtils.java:163) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at org.apache.http.client.entity.UrlEncodedFormEntity.<init>(UrlEncodedFormEntity.java:71) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at com.player.webservices.WebServices.imageUpload(WebServices.java:323) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at com.player.jsonparsing.JSONParsingXML.imageUpload(JSONParsingXML.java:191) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at com.player.presentationlayer.CreateMessageActivity.onActivityResult(CreateMessageActivity.java:254) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at android.app.Activity.dispatchActivityResult(Activity.java:3890) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at android.app.ActivityThread.deliverResults(ActivityThread.java:3511) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at android.app.ActivityThread.handleSendResult(ActivityThread.java:3557) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at android.app.ActivityThread.access$2800(ActivityThread.java:125) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2063) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at android.os.Handler.dispatchMessage(Handler.java:99) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at android.os.Looper.loop(Looper.java:123) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at java.lang.reflect.Method.invoke(Method.java:521) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
09-22 18:16:05.093: ERROR/AndroidRuntime(5455):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

Vous peut essayer de l'attraper dans Application.onlowMemory - mais qu'est-ce que cela vous apportera? Si vos vidéos sont énormes, vous ne devriez pas utiliser ByteArrayOutputStream mais une sorte de méthode de streaming, c'est à dire. lire un morceau de données vidéo, le convertir, puis l'envoyer plus loin. Ou convertissez-le, mais mettez des résultats dans la mémoire de la carte SD. Mettre toute la vidéo dans ByteArrayOutputStream se terminera toujours par OutOfMemory.