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问题描述
我试着我有一个位图变量序列化类至极。这里是code,它是位工作....我需要帮助找出什么仍然是错的......
Im trying to serialize a class in wich i have a bitmap variable. Here is the code that is a bit working.... I need help to find out what is still wrong.....
private Bitmap myVideoScreenshotBm;
private void writeObject(ObjectOutputStream out) throws IOException{
out.writeInt(myVideoScreenshotBm.getRowBytes());
out.writeInt(myVideoScreenshotBm.getHeight());
out.writeInt(myVideoScreenshotBm.getWidth());
int bmSize = myVideoScreenshotBm.getHeight() * myVideoScreenshotBm.getRowBytes();
ByteBuffer dst= ByteBuffer.allocate(bmSize);
myVideoScreenshotBm.copyPixelsToBuffer(dst);
byte[] bytesar=new byte[bmSize];
dst.position(0);
dst.get(bytesar);
out.write(bytesar);
}
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException{
int nbRowBytes=in.readInt();
int height=in.readInt();
int width=in.readInt();
//
int bmSize = nbRowBytes * height;
byte[] toread= new byte[bmSize];
in.read(toread, 0, toread.length);
ByteBuffer dst= ByteBuffer.allocate(bmSize);
dst.put(toread);
dst.position(0);
myVideoScreenshotBm=Bitmap.createBitmap(width, height, Bitmap.Config.ALPHA_8);
myVideoScreenshotBm.copyPixelsFromBuffer(dst);
}
我不是得到一个错误,但该位图即时得到是错误的......还有,我不知道如何知道哪些Bitmap.Config标志是适合......怎么知道?
Im not getting an error but the bitmap Im getting are wrong... also, I do not know how to know which Bitmap.Config flag is suitable... how to know ?
任何帮助吗?
推荐答案
下面是code与内存优化序列化。即时通讯使用一个静态缓冲区增长到最大的位图大小,并且我重用各一次。
Here is the code for a serialization with memory optimisation. Im using a static buffer that is growing to the biggest bitmap size and that I reuse each time.
public class Video implements Serializable{
public long videoId;
public String title;
public String publisher;
public String language;
public Date lastModified;
public Date published;
public String imageUrl;
public String url;
public Bitmap myVideoScreenshotBm;
public Date expireTime;
//public Drawable myVideoScreenshotDrawable;
private static ByteBuffer dst;
private static byte[] bytesar;
public Video (long newVideoId) {
this.videoId=newVideoId;
}
private void writeObject(ObjectOutputStream out) throws IOException{
out.writeLong(videoId);
out.writeObject(title);
out.writeObject(publisher);
out.writeObject(language);
out.writeObject(lastModified);
out.writeObject(published);
out.writeObject(expireTime);
out.writeObject(imageUrl);
out.writeObject(url);
out.writeInt(myVideoScreenshotBm.getRowBytes());
out.writeInt(myVideoScreenshotBm.getHeight());
out.writeInt(myVideoScreenshotBm.getWidth());
int bmSize = myVideoScreenshotBm.getRowBytes() * myVideoScreenshotBm.getHeight();
if(dst==null || bmSize > dst.capacity())
dst= ByteBuffer.allocate(bmSize);
out.writeInt(dst.capacity());
dst.position(0);
myVideoScreenshotBm.copyPixelsToBuffer(dst);
if(bytesar==null || bmSize > bytesar.length)
bytesar=new byte[bmSize];
dst.position(0);
dst.get(bytesar);
out.write(bytesar, 0, bytesar.length);
}
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException{
videoId=in.readLong();
title=(String) in.readObject();
publisher=(String) in.readObject();
language=(String) in.readObject();
lastModified=(Date) in.readObject();
published=(Date) in.readObject();
expireTime=(Date) in.readObject();
imageUrl = (String) in.readObject();
url = (String) in.readObject();
int nbRowBytes=in.readInt();
int height=in.readInt();
int width=in.readInt();
int bmSize=in.readInt();
if(bytesar==null || bmSize > bytesar.length)
bytesar= new byte[bmSize];
int offset=0;
while(in.available()>0){
offset=offset + in.read(bytesar, offset, in.available());
}
if(dst==null || bmSize > dst.capacity())
dst= ByteBuffer.allocate(bmSize);
dst.position(0);
dst.put(bytesar);
dst.position(0);
myVideoScreenshotBm=Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
myVideoScreenshotBm.copyPixelsFromBuffer(dst);
//in.close();
}
}
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