OutOfMemoryError的Andr​​oid

OutOfMemoryError的Andr​​oid

本文介绍了java.lang.OutOfMemoryError的Andr​​oid的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

  8月四日至25号:19:10.111二四三一年至2603年/ com.example.francesco.guidedautorewithtabs E /艺术:投掷的OutOfMemoryError未能分配与1983651免费字节一个字节4194316分配和1937KB直到OOM
8月4号至25日:19:10.114 2431年至2603年/ com.example.francesco.guidedautorewithtabs E / AndroidRuntime:致命异常:GLThread 285
工艺:com.example.francesco.guidedautorewithtabs,PID:2431
java.lang.OutOfMemoryError:无法分配4194316字节分配与1983651免费字节,1937KB,直到OOM
        在dalvik.system.VMRuntime.newNonMovableArray(本机方法)
        在android.graphics.Bitmap.nativeCreate(本机方法)
        在android.graphics.Bitmap.createBitmap(Bitmap.java:817)
        在android.graphics.Bitmap.createBitmap(Bitmap.java:794)
        在android.graphics.Bitmap.createBitmap(Bitmap.java:761)
        在com.google.maps.api.android.lib6.gmm6.ocla(来源不明)
        在com.google.maps.api.android.lib6.gmm6.ocoa(来源不明)
        在com.google.maps.api.android.lib6.gmm6.ocoa(来源不明)
        在com.google.maps.api.android.lib6.gmm6.ocob(来源不明)
        在com.google.maps.api.android.lib6.gmm6.ocbak.a(来源不明)
        在com.google.maps.api.android.lib6.gmm6.ocbas.a(来源不明)
        在com.google.maps.api.android.lib6.gmm6.oxa(来源不明)
        在com.google.maps.api.android.lib6.gmm6.ola(来源不明)
        在com.google.maps.api.android.lib6.gmm6.olb(来源不明)
        在com.google.maps.api.android.lib6.gmm6.o.cj.g(来源不明)
        在com.google.maps.api.android.lib6.gmm6.o.cj.run(来源不明)
 

在我的Andr​​oid $ C $词有很多都有被显示成不同片段的图像。几个这种存储在资产文件夹,其他拿起从HTTP请求。出于这个原因,我实现了图像的缓存,以不违背java.lang.OutOfMemoryError,但不过这个错误似乎仍然存在。我该如何解决这个问题呢?下面我实现的图像缓存。

ImageLoader的

 公共类ImageLoader的{
的MemoryCache的MemoryCache =新的MemoryCache();
FileCache fileCache;
私人地图< ImageView的,字符串> imageViews = Collections.synchronizedMap(新的WeakHashMap< ImageView的,字符串>());
ExecutorService的ExecutorService的;
私人上下文的背景下;

公共ImageLoader的(上下文的背景下){
    this.context =背景;
    fileCache =新FileCache(上下文);
    ExecutorService的= Executors.newFixedThreadPool(5);
}

最终诠释stub_id = R.drawable.no_image;
公共无效DisplayImage(字符串URL,ImageView的ImageView的)
{
    imageViews.put(ImageView的,URL);
    点阵位图= memoryCache.get(URL);
    如果(位图!= NULL)
        imageView.setImageBitmap(位);
    其他
    {
        queuePhoto(URL,ImageView的);
        imageView.setImageResource(stub_id);
    }
}

私人无效queuePhoto(字符串URL,ImageView的ImageView的)
{
    PhotoToLoad P =新PhotoToLoad(URL,ImageView的);
    executorService.submit(新PhotosLoader(对));
}

私人位图getBitmapFromAsset(字符串则strName)
{
    AssetManager assetManager = context.getAssets();
    InputStream的ISTR = NULL;
    尝试 {
        ISTR = assetManager.open(则strName);
    }赶上(IOException异常E){
        e.printStackTrace();
    }
    点阵位图= BitmapFactory.de codeStream(ISTR);
    返回的位图;
}

私人位图getBitmap(字符串URL)
{
    文件F = fileCache.getFile(URL);

    //从SD高速缓存
    位图B =去codeFILE(F);
    如果(B!= NULL)
        返回b;

    //从资产
    位图BM = getBitmapFromAsset(URL);

    如果(BM!= NULL)
        返回BM;

    //从网页
    尝试 {
        点阵位图= NULL;
        URL IMAGEURL =新的网址(URL);
        HttpURLConnection的康恩=(HttpURLConnection类)imageUrl.openConnection();
        conn.setConnectTimeout(30000);
        conn.setReadTimeout(30000);
        conn.setInstanceFollowRedirects(真正的);
        InputStream的是= conn.getInputStream();
        的OutputStream OS =新的FileOutputStream(F);
        Utils.CopyStream(是,OS);
        os.close();
        位=去codeFILE(F);
        返回的位图;
    }赶上(的Throwable前){
        ex.printStackTrace();
        如果(前的instanceof的OutOfMemoryError)
            memoryCache.clear();
        返回null;
    }
}

//德$ C $连拍影像和扩展它来减少内存消耗
私人位图德codeFILE(文件f){
    尝试 {
        //德code图像尺寸
        BitmapFactory.Options O =新BitmapFactory.Options();
        o.inJustDe codeBounds = TRUE;
        BitmapFactory.de codeStream(新的FileInputStream(f)项,空,O);

        //找到正确的比例值。它应该是2的幂。
        最终诠释REQUIRED_SIZE = 70;
        INT width_tmp = o.outWidth,height_tmp = o.outHeight;
        int标= 1;
        而(真){
            如果(width_tmp / 2'; REQUIRED_SIZE || height_tmp / 2'; REQUIRED_SIZE)
                打破;
            width_tmp / = 2;
            height_tmp / = 2;
            规模* = 2;
        }

        //德code与inSampleSize
        BitmapFactory.Options O2 =新BitmapFactory.Options();
        o2.inSampleSize =规模;
        返回BitmapFactory.de codeStream(新的FileInputStream(f)项,空,O2);
    }赶上(FileNotFoundException异常E){}
    返回null;
}

//任务队列
私有类PhotoToLoad
{
    公共字符串URL;
    公众的ImageView ImageView的;
    公共PhotoToLoad(字符串U,ImageView的我){
        URL = U;
        ImageView的=我;
    }
}

类PhotosLoader实现Runnable {
    PhotoToLoad photoToLoad;
    PhotosLoader(PhotoToLoad photoToLoad){
        this.photoToLoad = photoToLoad;
    }

    @覆盖
    公共无效的run(){
        如果(imageViewReused(photoToLoad))
            返回;
        BMP位= getBitmap(photoToLoad.url);
        memoryCache.put(photoToLoad.url,BMP);
        如果(imageViewReused(photoToLoad))
            返回;
        BitmapDisplayer BD =新BitmapDisplayer(BMP,photoToLoad);
        活动一=(活动)photoToLoad.imageView.getContext();
        a.runOnUiThread(BD);
    }
}

布尔imageViewReused(PhotoToLoad photoToLoad){
    字符串变量= imageViews.get(photoToLoad.imageView);
    如果(标记== NULL ||!tag.equals(photoToLoad.url))
        返回true;
    返回false;
}

//用于在UI线程中显示位图
类BitmapDisplayer实现Runnable
{
    点阵位图;
    PhotoToLoad photoToLoad;
    公共BitmapDisplayer(位图B,PhotoToLoad P){位= B,photoToLoad = P;}
    公共无效的run()
    {
        如果(imageViewReused(photoToLoad))
            返回;
        如果(位图!= NULL)
            photoToLoad.imageView.setImageBitmap(位);
        其他
            photoToLoad.imageView.setImageResource(stub_id);
    }
}

公共无效clearCache(){
    memoryCache.clear();
    fileCache.clear();
}
}
 

FileCache

 公共类FileCache {

私人文件cacheDir;

公共FileCache(上下文的背景下){
    //查找目录保存缓存图像
    如果(android.os.Environment.getExternalStorageState()。等于(android.os.Environment.MEDIA_MOUNTED))
        cacheDir =新的文件(android.os.Environment.getExternalStorageDirectory(),TTImages_cache);
    其他
        cacheDir = context.getCacheDir();
    如果(!cacheDir.exists())
        cacheDir.mkdirs();
}

公共文件的getFile(字符串URL){
    //我通过散列code识别图像。没有一个完美的解决方案,很好的演示。
    字符串文件名=将String.valueOf(url.hash code());
    //另一种可能的解决方案(感谢grantland)
    //字符串文件名= URLEn coder.en code(URL);
    文件F =新的文件(cacheDir,文件名);
    返回F;

}

公共无效清除(){
    文件[]文件= cacheDir.listFiles();
    如果(文件== NULL)
        返回;
    对于(F文件:文件)
        f.delete();
}

}
 

的MemoryCache

 公共类的MemoryCache {

私有静态最后字符串变量=的MemoryCache;
私人地图<字符串,位图>缓存= Collections.synchronizedMap(
        新的LinkedHashMap<字符串,位图>(10,1.5f,真)); //最后一个参数适用于LRU排序
私人长大小= 0; //当前分配的大小
专用长限制= 1000000; //最大内存字节

公众的MemoryCache(){
    //利用现有堆大小25%
    setLimit(调用Runtime.getRuntime()maxMemory()/ 4);
}

公共无效setLimit(长new_limit){
    极限= new_limit;
    Log.i(TAG的MemoryCache将最多使用+极限/ 1024/1024 +MB。);
}

公共位图获取(字符串ID){
    尝试{
        如果(!cache.containsKey(ID))
            返回null;
        // NullPointerException异常有时会发生在这里的http://$c$c.google.com/p/osmdroid/issues/detail ID = 78
        返回cache.get(ID);
    }赶上(NullPointerException异常前){
        ex.printStackTrace();
        返回null;
    }
}

公共无效认沽(字符型,点阵位图){
    尝试{
        如果(cache.containsKey(ID))
            大小 -  = getSizeInBytes(cache.get(ID));
        cache.put(ID,位图);
        大小+ = getSizeInBytes(位);
        checkSize();
    }赶上(的Throwable日){
        th.printStackTrace();
    }
}

私人无效checkSize(){
    Log.i(TAG,高速缓存大小=+尺寸+长度=+ cache.size());
    如果(大小与GT;限制){
        迭代器<进入<字符串,位图>> ITER = cache.entrySet()迭代(); //最近最少访问的项目将是第一个迭代
        而(iter.hasNext()){
            进入<字符串,位图>条目= iter.next();
            大小 -  = getSizeInBytes(entry.getValue());
            iter.remove();
            如果(大小与LT =限制)
                打破;
        }
        Log.i(TAG,清洁缓存新的大小。+ cache.size());
    }
}

公共无效清除(){
    尝试{
        // NullPointerException异常有时会发生在这里的http://$c$c.google.com/p/osmdroid/issues/detail ID = 78
        cache.clear();
        大小= 0;
    }赶上(NullPointerException异常前){
        ex.printStackTrace();
    }
}

长getSizeInBytes(位图位图){
    如果(位图== NULL)
        返回0;
    返回bitmap.getRowBytes()* bitmap.getHeight();
}
}
 

utils的

 公共类utils的{
公共静态无效CopyStream(InputStream的是,OutputStream的OS)
{
    最终诠释的buffer_size = 1024;
    尝试
    {
        字节[]字节=新字节[BUFFER_SIZE];
        对于(;;)
        {
            诠释计数= is.​​read(字节,0,BUFFER_SIZE);
            如果(计数==  -  1)
                打破;
            os.write(字节,0,计数);
        }
    }
    赶上(例外前){}
}
}
 

解决方案

试试这可能会帮助你在你的manifest文件添加此标记。

 安卓largeHeap =真
 

这将分配一大堆你的应用程序

04-25 08:19:10.111    2431-2603/com.example.francesco.guidedautorewithtabs E/art﹕ Throwing OutOfMemoryError "Failed to allocate a 4194316 byte allocation with 1983651 free bytes and 1937KB until OOM"
04-25 08:19:10.114    2431-2603/com.example.francesco.guidedautorewithtabs E/AndroidRuntime﹕ FATAL EXCEPTION: GLThread 285
Process: com.example.francesco.guidedautorewithtabs, PID: 2431
java.lang.OutOfMemoryError: Failed to allocate a 4194316 byte allocation with 1983651 free bytes and 1937KB until OOM
        at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
        at android.graphics.Bitmap.nativeCreate(Native Method)
        at android.graphics.Bitmap.createBitmap(Bitmap.java:817)
        at android.graphics.Bitmap.createBitmap(Bitmap.java:794)
        at android.graphics.Bitmap.createBitmap(Bitmap.java:761)
        at com.google.maps.api.android.lib6.gmm6.o.c.l.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.c.o.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.c.o.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.c.o.b(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.c.b.ak.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.c.b.as.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.x.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.l.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.l.b(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.cj.g(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.o.cj.run(Unknown Source)

In my Android code i have a lot of images that have to be displayed into different fragment. Several of this are stored in the assets folder, other picked up from an http request. For this reason i implement image caching in order to do not go against the java.lang.OutOfMemoryError, but nevertheless this error seems to persist. How can i resolve this problem? Below my implementation of image caching.

ImageLoader

public class ImageLoader {
MemoryCache memoryCache=new MemoryCache();
FileCache fileCache;
private Map<ImageView, String> imageViews=Collections.synchronizedMap(new WeakHashMap<ImageView, String>());
ExecutorService executorService;
private Context context;

public ImageLoader(Context context){
    this.context=context;
    fileCache=new FileCache(context);
    executorService=Executors.newFixedThreadPool(5);
}

final int stub_id= R.drawable.no_image;
public void DisplayImage(String url, ImageView imageView)
{
    imageViews.put(imageView, url);
    Bitmap bitmap=memoryCache.get(url);
    if(bitmap!=null)
        imageView.setImageBitmap(bitmap);
    else
    {
        queuePhoto(url, imageView);
        imageView.setImageResource(stub_id);
    }
}

private void queuePhoto(String url, ImageView imageView)
{
    PhotoToLoad p=new PhotoToLoad(url, imageView);
    executorService.submit(new PhotosLoader(p));
}

private Bitmap getBitmapFromAsset(String strName)
{
    AssetManager assetManager = context.getAssets();
    InputStream istr = null;
    try {
        istr = assetManager.open(strName);
    } catch (IOException e) {
        e.printStackTrace();
    }
    Bitmap bitmap = BitmapFactory.decodeStream(istr);
    return bitmap;
}

private Bitmap getBitmap(String url)
{
    File f=fileCache.getFile(url);

    //from SD cache
    Bitmap b = decodeFile(f);
    if(b!=null)
        return b;

    //from assets
    Bitmap bm = getBitmapFromAsset(url);

    if(bm!=null)
        return bm;

    //from web
    try {
        Bitmap bitmap=null;
        URL imageUrl = new URL(url);
        HttpURLConnection conn = (HttpURLConnection)imageUrl.openConnection();
        conn.setConnectTimeout(30000);
        conn.setReadTimeout(30000);
        conn.setInstanceFollowRedirects(true);
        InputStream is=conn.getInputStream();
        OutputStream os = new FileOutputStream(f);
        Utils.CopyStream(is, os);
        os.close();
        bitmap = decodeFile(f);
        return bitmap;
    } catch (Throwable ex){
        ex.printStackTrace();
        if(ex instanceof OutOfMemoryError)
            memoryCache.clear();
        return null;
    }
}

//decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f){
    try {
        //decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(new FileInputStream(f),null,o);

        //Find the correct scale value. It should be the power of 2.
        final int REQUIRED_SIZE=70;
        int width_tmp=o.outWidth, height_tmp=o.outHeight;
        int scale=1;
        while(true){
            if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
                break;
            width_tmp/=2;
            height_tmp/=2;
            scale*=2;
        }

        //decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize=scale;
        return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
    } catch (FileNotFoundException e) {}
    return null;
}

//Task for the queue
private class PhotoToLoad
{
    public String url;
    public ImageView imageView;
    public PhotoToLoad(String u, ImageView i){
        url=u;
        imageView=i;
    }
}

class PhotosLoader implements Runnable {
    PhotoToLoad photoToLoad;
    PhotosLoader(PhotoToLoad photoToLoad){
        this.photoToLoad=photoToLoad;
    }

    @Override
    public void run() {
        if(imageViewReused(photoToLoad))
            return;
        Bitmap bmp=getBitmap(photoToLoad.url);
        memoryCache.put(photoToLoad.url, bmp);
        if(imageViewReused(photoToLoad))
            return;
        BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad);
        Activity a=(Activity)photoToLoad.imageView.getContext();
        a.runOnUiThread(bd);
    }
}

boolean imageViewReused(PhotoToLoad photoToLoad){
    String tag=imageViews.get(photoToLoad.imageView);
    if(tag==null || !tag.equals(photoToLoad.url))
        return true;
    return false;
}

//Used to display bitmap in the UI thread
class BitmapDisplayer implements Runnable
{
    Bitmap bitmap;
    PhotoToLoad photoToLoad;
    public BitmapDisplayer(Bitmap b, PhotoToLoad p){bitmap=b;photoToLoad=p;}
    public void run()
    {
        if(imageViewReused(photoToLoad))
            return;
        if(bitmap!=null)
            photoToLoad.imageView.setImageBitmap(bitmap);
        else
            photoToLoad.imageView.setImageResource(stub_id);
    }
}

public void clearCache() {
    memoryCache.clear();
    fileCache.clear();
}
}

FileCache

public class FileCache {

private File cacheDir;

public FileCache(Context context){
    //Find the dir to save cached images
    if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
        cacheDir=new File(android.os.Environment.getExternalStorageDirectory(),"TTImages_cache");
    else
        cacheDir=context.getCacheDir();
    if(!cacheDir.exists())
        cacheDir.mkdirs();
}

public File getFile(String url){
    //I identify images by hashcode. Not a perfect solution, good for the demo.
    String filename=String.valueOf(url.hashCode());
    //Another possible solution (thanks to grantland)
    //String filename = URLEncoder.encode(url);
    File f = new File(cacheDir, filename);
    return f;

}

public void clear(){
    File[] files=cacheDir.listFiles();
    if(files==null)
        return;
    for(File f:files)
        f.delete();
}

}

MemoryCache

public class MemoryCache {

private static final String TAG = "MemoryCache";
private Map<String, Bitmap> cache=Collections.synchronizedMap(
        new LinkedHashMap<String, Bitmap>(10,1.5f,true));//Last argument true for LRU ordering
private long size=0;//current allocated size
private long limit=1000000;//max memory in bytes

public MemoryCache(){
    //use 25% of available heap size
    setLimit(Runtime.getRuntime().maxMemory()/4);
}

public void setLimit(long new_limit){
    limit=new_limit;
    Log.i(TAG, "MemoryCache will use up to "+limit/1024./1024.+"MB");
}

public Bitmap get(String id){
    try{
        if(!cache.containsKey(id))
            return null;
        //NullPointerException sometimes happen here http://code.google.com/p/osmdroid/issues/detail?id=78
        return cache.get(id);
    }catch(NullPointerException ex){
        ex.printStackTrace();
        return null;
    }
}

public void put(String id, Bitmap bitmap){
    try{
        if(cache.containsKey(id))
            size-=getSizeInBytes(cache.get(id));
        cache.put(id, bitmap);
        size+=getSizeInBytes(bitmap);
        checkSize();
    }catch(Throwable th){
        th.printStackTrace();
    }
}

private void checkSize() {
    Log.i(TAG, "cache size="+size+" length="+cache.size());
    if(size>limit){
        Iterator<Entry<String, Bitmap>> iter=cache.entrySet().iterator();//least recently accessed item will be the first one iterated
        while(iter.hasNext()){
            Entry<String, Bitmap> entry=iter.next();
            size-=getSizeInBytes(entry.getValue());
            iter.remove();
            if(size<=limit)
                break;
        }
        Log.i(TAG, "Clean cache. New size "+cache.size());
    }
}

public void clear() {
    try{
        //NullPointerException sometimes happen here http://code.google.com/p/osmdroid/issues/detail?id=78
        cache.clear();
        size=0;
    }catch(NullPointerException ex){
        ex.printStackTrace();
    }
}

long getSizeInBytes(Bitmap bitmap) {
    if(bitmap==null)
        return 0;
    return bitmap.getRowBytes() * bitmap.getHeight();
}
}

Utils

public class Utils {
public static void CopyStream(InputStream is, OutputStream os)
{
    final int buffer_size=1024;
    try
    {
        byte[] bytes=new byte[buffer_size];
        for(;;)
        {
            int count=is.read(bytes, 0, buffer_size);
            if(count==-1)
                break;
            os.write(bytes, 0, count);
        }
    }
    catch(Exception ex){}
}
}
解决方案

Try this may help youadd this tag in your manifest file.

android:largeHeap="true"

it will allocate large heap for your app

这篇关于java.lang.OutOfMemoryError的Andr​​oid的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-01 06:09