android dalvik vm-heap 在 XZ 压缩时内存分配不足

Question

我正在尝试在 API 2.3.3 上将 tar 压缩为 tar.xz。

无论我做什么我都会得到这个错误:

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();
}

我已经制作了几个不同的版本，但它们都产生了相同的错误。 我的应用程序中确实加载了图片库，但我尝试在不加载图片库的情况下进行压缩，但结果相同。

有人知道问题出在哪里吗？解决办法是什么？ 或者可能是将 tar 压缩为 tar.xz 的代码？

谢谢你的帮助。

Jade 眼。

Answer 1

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

我不太了解 XZ 压缩和 XZ utils 实现，但似乎这种压缩算法需要大量内存并且不太适合在当今的移动设备上使用。