Question

似乎BitmapRegionDecoder有内存泄漏。如果我运行下面的代码，我可以看到设备上的本机内存使用量增加。最终应用程序将因崩溃而死亡，因为Android操作系统会因为缺少可用内存而终止它：

public void doClick(View v) {

    String bitmapFileName = "/mnt/sdcard/Wallpaper Images/-398300536.jpg";
    BitmapRegionDecoder dec;

    try {
        for (int i = 0; i < 100; i++) {

            FileInputStream is = new FileInputStream(bitmapFileName);
            dec = BitmapRegionDecoder.newInstance(is, false);

            // I am not even doing anything with bitmap region decoder!

            is.close();
            dec.recycle();
            System.gc();

        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

运行adb shell dumpsys meminfo将报告以下之前执行上述代码（请参阅3273 kB本机分配）：

Applications Memory Usage (kB):
Uptime: 63276459 Realtime: 469577132

** MEMINFO in pid 27844 [com.example.test] **
                    native   dalvik    other    total
            size:     3284     5379      N/A     8663
       allocated:     3273     2831      N/A     6104
            free:       10     2548      N/A     2558
           (Pss):      600      779     2248     3627
  (shared dirty):       56     1256     5164     6476
    (priv dirty):      540       44     1036     1620

 Objects
           Views:        0        ViewRoots:        0
     AppContexts:        0       Activities:        0
          Assets:        2    AssetManagers:        2
   Local Binders:        5    Proxy Binders:       10
Death Recipients:        0
 OpenSSL Sockets:        0

 SQL
               heap:        0         MEMORY_USED:        0
 PAGECACHE_OVERFLOW:        0         MALLOC_SIZE:        0

在执行代码之后运行adb shell dumpsys meminfo 报告 12678kB已分配的本机内存！

Applications Memory Usage (kB): Uptime: 63281361 Realtime: 469582034 ** MEMINFO in pid 27844 [com.example.test] ** native dalvik other total size: 12972 5379 N/A 18351 allocated: 12678 2792 N/A 15470 free: 33 2587 N/A 2620 (Pss): 665 871 12411 13947 (shared dirty): 56 1256 5560 6872 (priv dirty): 612 48 10820 11480 Objects Views: 0 ViewRoots: 0 AppContexts: 0 Activities: 0 Assets: 2 AssetManagers: 2 Local Binders: 5 Proxy Binders: 11 Death Recipients: 1 OpenSSL Sockets: 0 SQL heap: 0 MEMORY_USED: 0 PAGECACHE_OVERFLOW: 0 MALLOC_SIZE: 0

这个问题似乎总是可以在2.3.5和4.1.2 Android（物理设备）上重现。这个问题在Android模拟器上也总是可以重现的（我试过Android 2.3.3）。我没有尝试过其他版本的Android，但我的猜测是其他版本的问题也是如此。

我做错了什么，或者BitmapRegionDecoder的recycle()方法根本不起作用？

我怎么能避免这个问题？

Android BitmapRegionDecoder内存泄漏

0 个答案: