android dlavikvm-堆内存分配XZ压缩

Question

我想压缩一个tar到API 2.3.3上的tar.xz。

不管我做什么，我得到这个错误：

06-09 20:56:32.230: V/CameraDemo(23418): filesPath -- > /mnt/sdcard/myimages 
06-09 20:56:32.336: D/dalvikvm(23418): GC_FOR_ALLOC freed 75K, 2% free 9193K/9347K, paused 14ms 
06-09 20:56:32.363: I/dalvikvm-heap(23418): Grow heap (frag case) to 21.304MB for 12853537-byte allocation 
06-09 20:56:32.390: D/dalvikvm(23418): GC_CONCURRENT freed 1K, 1% free 21744K/21959K, paused 1ms+2ms 
06-09 20:56:32.410: D/dalvikvm(23418): GC_FOR_ALLOC freed 1K, 2% free 22005K/22279K, paused 17ms 
06-09 20:56:32.476: I/dalvikvm-heap(23418): Grow heap (frag case) to 37.558MB for 16777232-byte allocation 
06-09 20:56:32.480: W/dalvikvm(23418): 67108888 byte allocation exceeds the 50331648 byte maximum heap size 
06-09 20:56:32.480: I/dalvikvm-heap(23418): Forcing collection of SoftReferences for 67108888-byte allocation 
06-09 20:56:32.508: D/dalvikvm(23418): GC_BEFORE_OOM freed 9K, 1% free 38380K/38727K, paused 25ms 
06-09 20:56:32.508: E/dalvikvm-heap(23418): Out of memory on a 67108888-byte allocation. 
06-09 20:56:32.508: I/dalvikvm(23418): "main" prio=5 tid=1 RUNNABLE 
06-09 20:56:32.508: I/dalvikvm(23418): | group="main" sCount=0 dsCount=0 obj=0x40a53460 self=0xa14828 
06-09 20:56:32.508: I/dalvikvm(23418): | sysTid=23418 nice=0 sched=0/0 cgrp=default handle=1074758792 
06-09 20:56:32.508: I/dalvikvm(23418): | schedstat=(0 0 0) utm=17 stm=8 core=0 
06-09 20:56:32.508: I/dalvikvm(23418): at org.tukaani.xz.lz.BT4.<init>((null):~-1) 
06-09 20:56:32.508: I/dalvikvm(23418): at org.tukaani.xz.lz.LZEncoder.getInstance((null):-1) 
06-09 20:56:32.508: I/dalvikvm(23418): at org.tukaani.xz.lzma.LZMAEncoderNormal.<init>((null):-1) 
06-09 20:56:32.511: I/dalvikvm(23418): at org.tukaani.xz.lzma.LZMAEncoder.getInstance((null):-1) 
06-09 20:56:32.511: I/dalvikvm(23418): at org.tukaani.xz.LZMA2OutputStream.<init>((null):-1) 
06-09 20:56:32.511: I/dalvikvm(23418): at org.tukaani.xz.LZMA2Options.getOutputStream((null):-1) 
06-09 20:56:32.511: I/dalvikvm(23418): at org.tukaani.xz.LZMA2Encoder.getOutputStream((null):-1) 
06-09 20:56:32.511: I/dalvikvm(23418): at org.tukaani.xz.BlockOutputStream.<init>((null):-1) 
06-09 20:56:32.511: I/dalvikvm(23418): at org.tukaani.xz.XZOutputStream.write((null):-1) 
06-09 20:56:32.511: I/dalvikvm(23418): at org.apache.commons.compress.compressors.xz.XZCompressorOutputStream.write(XZCompressorOutputStream.java:71) 
06-09 20:56:32.511: I/dalvikvm(23418): at utilities.CompressTar.compXZ(CompressTar.java:127) 
06-09 20:56:32.511: I/dalvikvm(23418): at utilities.CompressTar.<init>(CompressTar.java:52) 
06-09 20:56:32.511: I/dalvikvm(23418): at com.jadeye.CameraActivity$4.onClick(CameraActivity.java:101) 
06-09 20:56:32.519: I/dalvikvm(23418): at android.view.View.performClick(View.java:3511) 
06-09 20:56:32.523: I/dalvikvm(23418): at android.view.View$PerformClick.run(View.java:14105) 
06-09 20:56:32.523: I/dalvikvm(23418): at android.os.Handler.handleCallback(Handler.java:605) 
06-09 20:56:32.523: I/dalvikvm(23418): at android.os.Handler.dispatchMessage(Handler.java:92) 
06-09 20:56:32.523: I/dalvikvm(23418): at android.os.Looper.loop(Looper.java:137) 
06-09 20:56:32.523: I/dalvikvm(23418): at android.app.ActivityThread.main(ActivityThread.java:4424) 
06-09 20:56:32.523: I/dalvikvm(23418): at java.lang.reflect.Method.invokeNative(Native Method) 
06-09 20:56:32.523: I/dalvikvm(23418): at java.lang.reflect.Method.invoke(Method.java:511) 
06-09 20:56:32.523: I/dalvikvm(23418): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
06-09 20:56:32.523: I/dalvikvm(23418): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
06-09 20:56:32.523: I/dalvikvm(23418): at dalvik.system.NativeStart.main(Native Method) 
06-09 20:56:32.527: D/AndroidRuntime(23418): Shutting down VM 
06-09 20:56:32.527: W/dalvikvm(23418): threadid=1: thread exiting with uncaught exception (group=0x40a521f8) 
06-09 20:56:32.539: E/AndroidRuntime(23418): FATAL EXCEPTION: main 
06-09 20:56:32.539: E/AndroidRuntime(23418): java.lang.OutOfMemoryError 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.lz.BT4.<init>(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.lz.LZEncoder.getInstance(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.lzma.LZMAEncoderNormal.<init>(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.lzma.LZMAEncoder.getInstance(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.LZMA2OutputStream.<init>(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.LZMA2Options.getOutputStream(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.LZMA2Encoder.getOutputStream(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.BlockOutputStream.<init>(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.tukaani.xz.XZOutputStream.write(Unknown Source) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at org.apache.commons.compress.compressors.xz.XZCompressorOutputStream.write(XZCompressorOutputStream.java:71) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at utilities.CompressTar.compXZ(CompressTar.java:127) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at utilities.CompressTar.<init>(CompressTar.java:52) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at com.jadeye.CameraActivity$4.onClick(CameraActivity.java:101) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at android.view.View.performClick(View.java:3511) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at android.view.View$PerformClick.run(View.java:14105) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at android.os.Handler.handleCallback(Handler.java:605) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at android.os.Handler.dispatchMessage(Handler.java:92) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at android.os.Looper.loop(Looper.java:137) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at android.app.ActivityThread.main(ActivityThread.java:4424) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at java.lang.reflect.Method.invokeNative(Native Method) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at java.lang.reflect.Method.invoke(Method.java:511) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
06-09 20:56:32.539: E/AndroidRuntime(23418): at dalvik.system.NativeStart.main(Native Method) 

这是导致它的代码：

public void compXZ (String saveAs, String infile) throws IOException { 

    FileInputStream fin = new FileInputStream(infile); 
    BufferedInputStream in = new BufferedInputStream(fin); 
    FileOutputStream out = new FileOutputStream(saveAs); 
    XZCompressorOutputStream xzOut = new XZCompressorOutputStream(out); 
    final byte[] buffer = new byte[BUFFER]; 
    int n = 0; 
    while (-1 != (n = in.read(buffer))) { 
     xzOut.write(buffer, 0, n); 
    } 

    xzOut.finish(); 
    xzOut.close(); 
    fin.close(); 
} 

我做的这几个不同的版本，但他们都得到同样的错误。 我确实在我的应用程序中加载了一个图片库，但已尝试使用加载库进行压缩，并且产生相同效果。

有没有人知道问题是什么？解决方案是什么？ 或者也许代码压缩焦油tar.xz？

谢谢你的帮助。

Jadeye。

Answer 1

您正在使用的XZ压缩尝试分配67 MB的内存。对于大多数移动设备来说，这太多了。

我对XZ压缩和XZ utils的实现了解不多，但似乎这种压缩算法需要大量内存，并不适合当今的移动设备使用。