1

这是我的代码。开始时的目标是将图像抓取到动态列表视图中，基本上就像我自己数据库中的 RSS 提要一样。我所做的是抓取http链接并将其转换为drawable，然后从那里将drawable从动态列表视图设置为imageview。

这是问题所在。当我进入应用程序时，第一次加载是好的。但是当我点击刷新按钮时，我将收到“633632 字节分配时内存不足”错误，然后是更详细的错误版本，其中包含所有已分配的堆大小限制。

我该如何解决这个问题？

package com.whatstherex.sam;

import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Vector;

import org.apache.http.NameValuePair;

import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;

public class Snapshots extends Activity implements View.OnClickListener {
Button bBackSnapshots, bRefreshSnapshots, bSnapshotsSnapshots;
ListView snapshotsDynamicListView;
Vector<SnapshotsData> snapshotsInputs = new Vector<SnapshotsData>();
SnapshotsCustomFeedAdaptor adaptor;
String username, snapshotsList;
String[] feed;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);
    setContentView(R.layout.snapshots);

    initialize();
}

public void initialize() {
    bBackSnapshots = (Button) findViewById(R.id.bBackSnapshots);
    bRefreshSnapshots = (Button) findViewById(R.id.bRefreshSnapshots);
    bSnapshotsSnapshots = (Button) findViewById(R.id.bSnapshotsSnapshots);

    bBackSnapshots.setOnClickListener(this);
    bRefreshSnapshots.setOnClickListener(this);
    bSnapshotsSnapshots.setOnClickListener(this);                           

    getInformations();
}

private AsyncTask<String, Void, String> task;
private AsyncTask<String, Void, String> task1;
private AsyncTask<String, Void, InputStream[]> task2;

public void getInformations(){
    task = new AsyncTask<String, Void, String>() {
        ProgressDialog dialog;
        Bundle bundle;
        String res;
        @Override 
        protected void onPreExecute(){
            dialog = new ProgressDialog(Snapshots.this, ProgressDialog.STYLE_SPINNER);
            dialog.setMessage("Loading Data...");           
            dialog.setCancelable(false);
            dialog.setCanceledOnTouchOutside(false);    

            dialog.show();
        }

        @Override
        protected String doInBackground(String... arg0) {
            bundle = getIntent().getExtras();
            res = bundle.getString("Username");
            return res;
        }

        @Override
        protected void onPostExecute(String result) {
            dialog.dismiss();
            username = result;      

            task1 = new AsyncTask<String, Void, String>() {
                ProgressDialog dialog1;
                ArrayList<NameValuePair> postParameters;
                String response1;
                String res1;
                @Override 
                protected void onPreExecute(){
                    snapshotsDynamicListView = (ListView) findViewById(R.id.lvSnapshots);                       

                    postParameters = new ArrayList<NameValuePair>();

                    dialog1 = new ProgressDialog(Snapshots.this, ProgressDialog.STYLE_SPINNER);
                    dialog1.setMessage("Loading Data...");          
                    dialog1.setCancelable(false);
                    dialog1.setCanceledOnTouchOutside(false);   

                    dialog1.show();
                }

                @Override
                protected String doInBackground(String... arg0) {
                    try {
                        response1 = CustomHttpClient.executeHttpPost("http://whatstherex.info/getS.php", postParameters);

                        res1 = response1.toString();

                        res1 = res1.replaceAll("null", "");

                        snapshotsList = res1.toString();

                        return snapshotsList;
                    }catch(Exception e){
                        res1 = e.toString();
                        return res1;
                    }
                }

                @Override
                protected void onPostExecute(String result1) {
                    feed = result1.split("[_]");

                    task2 = new AsyncTask<String, Void, InputStream[]>() {          
                        ProgressDialog dialog2;
                        InputStream[] is = new InputStream[50];
                        Drawable[] d = new Drawable[50];
                        String[] res2 = new String[50];
                        Drawable p4, p5, p9, p10, p14, p15, p19, p20, p24, p25, p29, p30, p34, p35, p39, p40, p44, p45, p49, p50, p54, p55, p59, p60, p64, p65, p69, p70, p74, p75, p79, p80, p84, p85, p89, p90, p94, p95, p99, p100, p104, p105, p109, p110, p114, p115, p119, p120, p124, p125;
                        @Override 
                        protected void onPreExecute(){
                            dialog2 = new ProgressDialog(Snapshots.this, ProgressDialog.STYLE_SPINNER);
                            dialog2.setMessage("Loading Data...");          
                            dialog2.setCancelable(false);
                            dialog2.setCanceledOnTouchOutside(false);   

                            dialog2.show();
                        }

                        @Override
                        protected InputStream[] doInBackground(String... src) {
                            for(int i = 0; i<50; i++){
                                res2[i] = src[i];
                            }
                            for(int i = 0; i<50; i++){
                                try {
                                    is[i] = (InputStream) new URL(res2[i]).getContent();                                        
                                } catch (Exception e) {
                                    e.toString();
                                }
                            }
                                return is;
                        }

                        @Override
                        protected void onPostExecute(InputStream[] result2) {
                            for(int i = 0; i<50; i++){
                                try {
                                    d[i] = Drawable.createFromStream(result2[i], "src name");
                                } catch (Exception e) {
                                    e.toString();
                                }
                            }

                            p4 = d[0];
                            p5 = d[1];
                            p9 = d[2];
                            p10 = d[3];
                            p14 = d[4];
                            p15 = d[5];
                            p19 = d[6];
                            p20 = d[7];
                            p24 = d[8];
                            p25 = d[9];
                            p29 = d[10];
                            p30 = d[11];
                            p34 = d[12];
                            p35 = d[13];
                            p39 = d[14];
                            p40 = d[15];
                            p44 = d[16];
                            p45 = d[17];
                            p49 = d[18];
                            p50 = d[19];
                            p54 = d[20];
                            p55 = d[21];
                            p59 = d[22];
                            p60 = d[23];
                            p64 = d[24];
                            p65 = d[25];
                            p69 = d[26];
                            p70 = d[27];
                            p74 = d[28];
                            p75 = d[29];
                            p79 = d[30];
                            p80 = d[31];
                            p84 = d[32];
                            p85 = d[33];
                            p89 = d[34];
                            p90 = d[35];
                            p94 = d[36];
                            p95 = d[37];
                            p99 = d[38];
                            p100 = d[39];
                            p104 = d[40];
                            p105 = d[41];
                            p109 = d[42];
                            p110 = d[43];
                            p114 = d[44];
                            p115 = d[45];
                            p119 = d[46];
                            p120 = d[47];
                            p124 = d[48];
                            p125 = d[49];

                            snapshotsInputs.add(new SnapshotsData(feed[1].toString(), feed[2].toString(), feed[3].toString(), p4, p5));
                            snapshotsInputs.add(new SnapshotsData(feed[6].toString(), feed[7].toString(), feed[8].toString(), p9, p10));
                            snapshotsInputs.add(new SnapshotsData(feed[11].toString(), feed[12].toString(), feed[13].toString(), p14, p15));
                            snapshotsInputs.add(new SnapshotsData(feed[16].toString(), feed[17].toString(), feed[18].toString(), p19, p20));
                            snapshotsInputs.add(new SnapshotsData(feed[21].toString(), feed[22].toString(), feed[23].toString(), p24, p25));
                            snapshotsInputs.add(new SnapshotsData(feed[26].toString(), feed[27].toString(), feed[28].toString(), p29, p30));
                            snapshotsInputs.add(new SnapshotsData(feed[31].toString(), feed[32].toString(), feed[33].toString(), p34, p35));
                            snapshotsInputs.add(new SnapshotsData(feed[36].toString(), feed[37].toString(), feed[38].toString(), p39, p40));
                            snapshotsInputs.add(new SnapshotsData(feed[41].toString(), feed[42].toString(), feed[43].toString(), p44, p45));
                            snapshotsInputs.add(new SnapshotsData(feed[46].toString(), feed[47].toString(), feed[48].toString(), p49, p50));
                            snapshotsInputs.add(new SnapshotsData(feed[51].toString(), feed[52].toString(), feed[53].toString(), p54, p55));
                            snapshotsInputs.add(new SnapshotsData(feed[56].toString(), feed[57].toString(), feed[58].toString(), p59, p60));
                            snapshotsInputs.add(new SnapshotsData(feed[61].toString(), feed[62].toString(), feed[63].toString(), p64, p65));
                            snapshotsInputs.add(new SnapshotsData(feed[66].toString(), feed[67].toString(), feed[68].toString(), p69, p70));
                            snapshotsInputs.add(new SnapshotsData(feed[71].toString(), feed[72].toString(), feed[73].toString(), p74, p75));
                            snapshotsInputs.add(new SnapshotsData(feed[76].toString(), feed[77].toString(), feed[78].toString(), p79, p80));
                            snapshotsInputs.add(new SnapshotsData(feed[81].toString(), feed[82].toString(), feed[83].toString(), p84, p85));
                            snapshotsInputs.add(new SnapshotsData(feed[86].toString(), feed[87].toString(), feed[88].toString(), p89, p90));
                            snapshotsInputs.add(new SnapshotsData(feed[91].toString(), feed[92].toString(), feed[93].toString(), p94, p95));
                            snapshotsInputs.add(new SnapshotsData(feed[96].toString(), feed[97].toString(), feed[98].toString(), p99, p100));
                            snapshotsInputs.add(new SnapshotsData(feed[101].toString(), feed[102].toString(), feed[103].toString(), p104, p105));
                            snapshotsInputs.add(new SnapshotsData(feed[106].toString(), feed[107].toString(), feed[108].toString(), p109, p110));
                            snapshotsInputs.add(new SnapshotsData(feed[111].toString(), feed[112].toString(), feed[113].toString(), p114, p115));
                            snapshotsInputs.add(new SnapshotsData(feed[116].toString(), feed[117].toString(), feed[118].toString(), p119, p120));
                            snapshotsInputs.add(new SnapshotsData(feed[121].toString(), feed[122].toString(), feed[123].toString(), p124, p125));

                            adaptor = new SnapshotsCustomFeedAdaptor(Snapshots.this, R.layout.snapshotsdata, snapshotsInputs);
                            snapshotsDynamicListView.setAdapter(adaptor);

                            dialog2.dismiss();  
                        }
                    };                      
                    task2.execute(feed[4], feed[5], feed[9], feed[10], feed[14], feed[15], feed[19], feed[20], feed[24], feed[25], feed[29], feed[30], 
                            feed[34], feed[35], feed[39], feed[40], feed[44], feed[45], feed[49], feed[50], feed[54], feed[55], feed[59], feed[60], 
                            feed[64], feed[65], feed[69], feed[70], feed[74], feed[75], feed[79], feed[80], feed[84], feed[85], feed[89], feed[90], 
                            feed[94], feed[95], feed[99], feed[100], feed[104], feed[105], feed[109], feed[110], feed[114], feed[115], feed[119], 
                            feed[120], feed[124], feed[125]);

                    dialog1.dismiss();
                }
            };
            task1.execute();
        }
    };
    task.execute();
}

@Override
public void onClick(View v) {
    switch (v.getId()){
    case R.id.bBackSnapshots:
        finish();
        break;
    case R.id.bRefreshSnapshots:
        finish();
        startActivity(getIntent());
        break;
    case R.id.bSnapshotsSnapshots:

        break;
    }
}       
}
4

2 回答 2

2

为什么要将大量的 Drawables 添加到内存中。这就是问题所在。应用程序内存限制仅为 ~16MB（每个设备的变化）。然而，看起来你正在加载 100 个可绘制对象，很可能超过了这个。

您应该仅在列表请求新视图时加载可绘制对象。它会在不需要时将其丢弃。

编辑：

您可以做的是覆盖适配器类。并指定一个图片的网址。然后在 getView 方法中，从给定的 Url 加载图像。这会按需处理异步加载。

参见例如：

https://stackoverflow.com/a/3068012/940834

http://www.androidhive.info/2012/02/android-custom-listview-with-image-and-text/

于 2013-01-13T10:51:49.300 回答
0

它不是引发错误的分配通常是问题，除非它的大小是兆字节。您正在使用的所有其余内存都是一个问题。你几乎可以肯定泄漏了一些东西。使用该应用程序并获取堆栈的 hprof 转储，查找应删除的内容而不是删除的内容或创建的对象过多。

于 2013-01-13T09:19:37.923 回答