android 不满意链接错误 : Library not found

Question

我从 git 存储库中 check out 了 coolreader 3 http://sourceforge.net/projects/crengine/ . 我尝试在 eclipse 中构建它，但在运行时它崩溃并出现以下错误:

The application Cool Reader (process.org.coolreader) has stopped unexpectedly. Please try again.

这是来自 logcat 的红色部分:

08-27 02:54:24.553: ERROR/AndroidRuntime(223): Uncaught handler: thread BackgroundThread44c32540 exiting due to uncaught exception
08-27 02:54:24.583: ERROR/AndroidRuntime(223): java.lang.UnsatisfiedLinkError: Library cr3engine-45-15 not found
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at java.lang.Runtime.loadLibrary(Runtime.java:489)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at java.lang.System.loadLibrary(System.java:557)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at org.coolreader.crengine.Engine.installLibrary(Engine.java:837)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at org.coolreader.crengine.Engine.init(Engine.java:745)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at org.coolreader.crengine.Engine.access$10(Engine.java:742)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at org.coolreader.crengine.Engine$4.run(Engine.java:565)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at android.os.Handler.handleCallback(Handler.java:587)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at android.os.Handler.dispatchMessage(Handler.java:92)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at android.os.Looper.loop(Looper.java:123)
08-27 02:54:24.583: ERROR/AndroidRuntime(223):     at org.coolreader.crengine.BackgroundThread.run(BackgroundThread.java:120)

and this is the function org.coolreader.crengine.Engine.installLibrary:

private void installLibrary() {
    try {
        if (force_install_library)
            throw new Exception("forcing install");
        // try loading library w/o manual installation
        log.i("trying to load library " + LIBRARY_NAME
                + " w/o installation");
        System.loadLibrary(LIBRARY_NAME);
        // try invoke native method
        //log.i("trying execute native method ");
        //setHyphenationMethod(HYPH_NONE, new byte[] {});
        log.i(LIBRARY_NAME + " loaded successfully");
    } catch (Exception ee) {
        log.i(SO_NAME + " not found using standard paths, will install manually");
        File sopath = mActivity.getDir("libs", Context.MODE_PRIVATE);
        File soname = new File(sopath, SO_NAME);
        try {
            sopath.mkdirs();
            File zip = new File(mActivity.getPackageCodePath());
            ZipFile zipfile = new ZipFile(zip);
            ZipEntry zipentry = zipfile.getEntry("lib/armeabi/" + SO_NAME);
            if (!soname.exists() || zipentry.getSize() != soname.length()) {
                InputStream is = zipfile.getInputStream(zipentry);
                OutputStream os = new FileOutputStream(soname);
                Log.i("cr3",
                        "Installing JNI library "
                                + soname.getAbsolutePath());
                final int BUF_SIZE = 0x10000;
                byte[] buf = new byte[BUF_SIZE];
                int n;
                while ((n = is.read(buf)) > 0)
                    os.write(buf, 0, n);
                is.close();
                os.close();
            } else {
                log.i("JNI library " + soname.getAbsolutePath()
                        + " is up to date");
            }
            System.load(soname.getAbsolutePath());
            //setHyphenationMethod(HYPH_NONE, new byte[] {});
        } catch (Exception e) {
            log.e("cannot install " + LIBRARY_NAME + " library", e);
        }
    }
}

engine.java中第837行:

 System.loadLibrary(LIBRARY_NAME);

engine.java 中的 LIBRARY_NAME 设置为:

 static final private String LIBRARY_NAME = "cr3engine-45-15";

自从我从存储库下载代码后，它应该无需任何修改即可工作。我不明白为什么它不起作用。

Answer 1

这些不是标准名称，因为它们缺少 lib 前缀。

System.loadLibrary("lept");
System.loadLibrary("tess");

这会导致搜索 liblept.so 而不是您拥有的文件。要么给你的库一个标准名称，要么指定一个实际的文件名，包括它最终安装在设备上的路径

System.load(("lept") 
//rather than 
System.loadLibrary().

如果它是unsatisfiedlink 错误 那么在没有看到您的代码的情况下，仅假设您的代码正在尝试加载共享库 liblept.so 并且该库在该路径中不可用。此外，您正在使用的代码要么在任何 lib 或内部包目录中都有该 liblept.so 文件，要么您必须使用 Android-NDK 生成(构建)该共享库尝试遵循 tutorial1 , tutorial2