关于datebase，cursor的一些异常 android.database.CursorWindowAllocationException: Cursor window allocation of

android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed even after closing cursor

android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed. # Open Cursors=705 (# cursors opened by this proc=705)

出现这个的话一般是以下几种情况

cursor是否为空没有判断

datebase没有关闭

cursor没有关闭

ok，下面上两段代码：

import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

/**
* Created by fanyafeng on 2015/7/28/0028.
*/
public class CollectTableCourse {
private static final String RECORDTABLE = "t_collect";
private SQLiteDatabase db = null;

public CollectTableCourse(SQLiteDatabase db) {
this.db = db;
}

public Boolean searchCollect(String v_id) {
String sql = "SELECT v_id FROM " + RECORDTABLE + " WHERE v_id = ?";
String searchField[] = new String[]{v_id};
Cursor result = this.db.rawQuery(sql, searchField);
if (result != null) {
result.moveToFirst();
}
if (result.getCount() == 0) {
result.close();
this.db.close();
return true;
} else {
result.close();
this.db.close();
return false;
}
}
}

import android.content.Context;
import android.graphics.Bitmap;
import android.support.v4.util.LruCache;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.cj.dreams.video.R;
import com.cj.dreams.video.bean.VideoListBean;
import com.cj.dreams.video.dbhelper.CollectTableCourse;
import com.cj.dreams.video.dbhelper.GoodTableCourse;
import com.cj.dreams.video.dbhelper.LaughSQLiteOpenHelper;
import com.cj.dreams.video.dbhelper.RecordTableCourse;
import com.cj.dreams.video.dboperate.CollectOperate;
import com.cj.dreams.video.dboperate.GoodOperate;
import com.cj.dreams.video.dboperate.RecordOperate;
import FanYaFeng.L;
import com.cj.dreams.video.util.ListViewImageTaskUtil;
import FanYaFeng.PostUtil;
import com.cj.dreams.video.util.T;

import java.io.IOException;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

/**
* Created by fanyafeng on 2015/7/7/0007.
*/
public class VideoListAdapter extends ABaseAdapter {
private Context context;
private List<VideoListBean> videoListBeanList;
private LaughSQLiteOpenHelper laughSQLiteOpenHelper;
private RecordOperate recordOperate;
private CollectOperate collectOperate;
private GoodOperate goodOperate;
//用来记录播放状态的图标显示，测试
private ViewHolder holder;

// 获取当前应用程序所分配的最大内存
private final int maxMemory = (int) Runtime.getRuntime().maxMemory();
// 只用五分之一用来做图片缓存
private final int cacheSize = maxMemory / 5;

private LruCache<String, Bitmap> mLruCache = new LruCache<String, Bitmap>(
cacheSize) {

// 重写sizeof（）方法
@Override
protected int sizeOf(String key, Bitmap bitmap) {
// TODO Auto-generated method stub
// 这里用多少kb来计算
return bitmap.getRowBytes() * bitmap.getHeight() / 1024;
}

};

public VideoListAdapter(Context context, List<VideoListBean> videoListBeanList) {
this.context = context;
this.videoListBeanList = videoListBeanList;

}

public void update() {
notifyDataSetChanged();
}

@Override
public int getCount() {
return videoListBeanList.size();
}

@Override
public Object getItem(int position) {
return videoListBeanList.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
View view = convertView;
if (view == null) {
view = LayoutInflater.from(context).inflate(R.layout.item_activity_video_list, null);
holder = new ViewHolder();
view.setTag(holder);
holder.item_background=(LinearLayout)view.findViewById(R.id.item_background);
holder.videoListIcon = (ImageView) view.findViewById(R.id.videolist_icon);
holder.videoListTitle = (TextView) view.findViewById(R.id.videolist_title);
holder.videoPlayTimes = (TextView) view.findViewById(R.id.videolist_play_times);
holder.videoCollectTimes = (TextView) view.findViewById(R.id.videolist_collect_times);
holder.videoGoodTimes = (TextView) view.findViewById(R.id.videolist_good_times);
holder.videoPlayIcon = (ImageView) view.findViewById(R.id.videolist_play_icon);
holder.videoCollectIcon = (ImageView) view.findViewById(R.id.videolist_collect_icon);
holder.videoGoodIcon = (ImageView) view.findViewById(R.id.videolist_good_icon);
} else {
holder = (ViewHolder) convertView.getTag();
}

laughSQLiteOpenHelper = new LaughSQLiteOpenHelper(context);
laughSQLiteOpenHelper.getWritableDatabase();
if (new RecordTableCourse(laughSQLiteOpenHelper.getReadableDatabase()).searchRecord(videoListBeanList.get(position).getVideoId())) {
holder.videoPlayIcon.setImageResource(R.drawable.icon_bof);
} else {
holder.videoPlayIcon.setImageResource(R.drawable.icon_bof_d);
}

holder.videoCollectIcon.setOnClickListener(new collectClick(position));
if (new CollectTableCourse(laughSQLiteOpenHelper.getReadableDatabase()).searchCollect(videoListBeanList.get(position).getVideoId())) {
holder.videoCollectIcon.setImageResource(R.drawable.icon_shouc);
} else {
holder.videoCollectIcon.setImageResource(R.drawable.icon_shouc_d);
}

holder.videoGoodIcon.setOnClickListener(new goodClick(position));
if (new GoodTableCourse(laughSQLiteOpenHelper.getReadableDatabase()).searchGood(videoListBeanList.get(position).getVideoId())) {
holder.videoGoodIcon.setImageResource(R.drawable.icon_z);
} else {
holder.videoGoodIcon.setImageResource(R.drawable.icon_z_d);
}

loadBitmap(videoListBeanList.get(position).getVideoImage(), holder.videoListIcon);
holder.item_background.getBackground().setAlpha(50);
holder.videoListTitle.setText(videoListBeanList.get(position).getVideoTitle());
holder.videoPlayTimes.setText(videoListBeanList.get(position).getVideoPlayTimes());
holder.videoCollectTimes.setText(videoListBeanList.get(position).getVideoCollectTimes());
holder.videoGoodTimes.setText(videoListBeanList.get(position).getVideoGoodTimes());
laughSQLiteOpenHelper.close();
return view;

}

class collectClick implements View.OnClickListener {
private int position;

collectClick(int position) {
this.position = position;
}

@Override
public void onClick(View v) {
Thread loadThread = new Thread(new LoadThread(videoListBeanList.get(position).getVideoId(), "collect"));
loadThread.start();
int collectId = v.getId();
if (collectId == holder.videoCollectIcon.getId()) {
if (new CollectTableCourse(laughSQLiteOpenHelper.getReadableDatabase()).searchCollect(videoListBeanList.get(position).getVideoId())) {
collectOperate = new CollectOperate(laughSQLiteOpenHelper.getReadableDatabase());
collectOperate.insert(videoListBeanList.get(position).getVideoId(), videoListBeanList.get(position).getVideoImage(), videoListBeanList.get(position).getVideoTitle(), videoListBeanList.get(position).getVideoUrl());
holder.videoCollectIcon.setImageResource(R.drawable.icon_shouc_d);
} else {
collectOperate = new CollectOperate(laughSQLiteOpenHelper.getReadableDatabase());
collectOperate.delete(videoListBeanList.get(position).getVideoId());
holder.videoCollectIcon.setImageResource(R.drawable.icon_shouc);
}
notifyDataSetChanged();
laughSQLiteOpenHelper.close();
}
}
}

class goodClick implements View.OnClickListener {
private int position;

goodClick(int position) {
this.position = position;
}

@Override
public void onClick(View v) {
Thread loadThread = new Thread(new LoadThread(videoListBeanList.get(position).getVideoId(), "praise"));
loadThread.start();
int playId = v.getId();
if (playId == holder.videoGoodIcon.getId()) {

if (new GoodTableCourse(laughSQLiteOpenHelper.getReadableDatabase()).searchGood(videoListBeanList.get(position).getVideoId())) {
goodOperate = new GoodOperate(laughSQLiteOpenHelper.getReadableDatabase());
goodOperate.insert(videoListBeanList.get(position).getVideoId());
holder.videoGoodIcon.setImageResource(R.drawable.icon_z_d);
} else {
goodOperate = new GoodOperate(laughSQLiteOpenHelper.getReadableDatabase());
goodOperate.delete(videoListBeanList.get(position).getVideoId());
holder.videoGoodIcon.setImageResource(R.drawable.icon_z);
}
notifyDataSetChanged();
laughSQLiteOpenHelper.close();
}
}
}

private void loadBitmap(String urlStr, ImageView image) {

ListViewImageTaskUtil asyncLoader = new ListViewImageTaskUtil(image, mLruCache);// 一个异步图片加载对象
Bitmap bitmap = asyncLoader.getBitmapFromMemoryCache(urlStr);// 首先从内存缓存中获取图片
if (bitmap != null) {
image.setImageBitmap(bitmap);// 如果缓存中存在这张图片则直接设置给ImageView
} else {
image.setImageResource(R.drawable.wait);// 否则先设置成默认的图片
asyncLoader.execute(urlStr);// 然后执行异步任务AsycnTask 去网上加载图片
}
}

class LoadThread implements Runnable {
private String id;
private String type;

LoadThread(String id, String type) {
this.id = id;
this.type = type;
}

@Override
public void run() {
loadData(id, type);
}
}

private void loadData(String videoId, String buttonType) {
Map<String, String> map = new LinkedHashMap<>();
map.put("videoid", videoId);
map.put("type", buttonType);
try {
String backMsg = PostUtil.postData(BaseUrl + PostVideoInfo, map);
L.d("运行到此，点赞，收藏加1");
} catch (IOException e) {
e.printStackTrace();
}
}

class ViewHolder {
LinearLayout item_background;
ImageView videoListIcon;
TextView videoListTitle;
TextView videoPlayTimes;
TextView videoCollectTimes;
TextView videoGoodTimes;
ImageView videoPlayIcon;
ImageView videoCollectIcon;
ImageView videoGoodIcon;
}
}