这是我的代码。启动时的目标是将图像抓取到动态列表视图中，基本上就像来自我自己的数据库的RSS源。我做的是抓住http链接并将其转换为drawable然后从那里将drawable设置为动态列表视图中的imageview。
这是问题所在。当我进入应用程序时，首先加载是可以的。但是，当我点击刷新按钮时，我将得到“633632字节分配内存不足”错误，然后是错误的更详细版本，并且分配了所有堆大小，限制。
我怎么能绕过这个？
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;
}
}
}
答案 0 :(得分：2)
为什么要将大量的Drawables添加到内存中。那就是那个问题。应用内存限制仅为~16MB（每台设备更改）。然而，看起来你正在装载100个抽屉，最有可能超过这个。
您应该只在列表请求新视图时加载drawable。它将在不需要时处理它。
编辑：
您可以做的是覆盖适配器类。并指定要映像的网址。然后在getView方法中，从给定的Url加载图像。这会根据需要处理异步加载。
参见例如：
https://stackoverflow.com/a/3068012/940834
http://www.androidhive.info/2012/02/android-custom-listview-with-image-and-text/
答案 1 :(得分：0)
它不是抛出通常是问题的错误的分配，除非它的兆字节大小。你正在使用的所有剩余的内存都是一个问题。你几乎肯定会泄漏一些东西。使用应用程序并获取堆栈的hprof转储，查找应删除但未删除的内容或创建的某些对象太多。