How To Get The Path To The Lib Folder For An Installed Package

Shared libraries .so files are placed in lib/armeabi in an apk file. I have read after installation the libs gets extracted to /data/data/application_package/lib How can I get the

Solution 1:

Added in API level 9

getContext().getApplicationInfo().nativeLibraryDir;

Solution 2:

You can get the exact path with:

StringlibraryPath= getContext().getApplicationInfo().dataDir + "/lib";

The directory and its files are readable by the application.

The unix permissions are set to rwxr-x--x. So applications with the same group can read the files.

Solution 3:

And if you're using a native activity and C++:

void ANativeActivity_onCreate(ANativeActivity* app, void*, size_t) {
    const jclass contextClass = app->env->GetObjectClass(app->clazz);
    const jmethodID getApplicationContextMethod =
        app->env->GetMethodID(contextClass, "getApplicationContext", "()Landroid/content/Context;");
    const jobject contextObject =
        app->env->CallObjectMethod(app->clazz, getApplicationContextMethod);
    const jmethodID getApplicationInfoMethod = app->env->GetMethodID(
        contextClass, "getApplicationInfo", "()Landroid/content/pm/ApplicationInfo;");
    const jobject applicationInfoObject =
        app->env->CallObjectMethod(contextObject, getApplicationInfoMethod);
    const jfieldID nativeLibraryDirField = app->env->GetFieldID(
        app->env->GetObjectClass(applicationInfoObject), "nativeLibraryDir", "Ljava/lang/String;");
    const jobject nativeLibraryDirObject =
        app->env->GetObjectField(applicationInfoObject, nativeLibraryDirField);
    const jmethodID getBytesMethod = app->env->GetMethodID(
        app->env->GetObjectClass(nativeLibraryDirObject), "getBytes", "(Ljava/lang/String;)[B");
    const auto bytesObject = static_cast<jbyteArray>(app->env->CallObjectMethod(
        nativeLibraryDirObject, getBytesMethod, app->env->NewStringUTF("UTF-8")));
    const size_t length = app->env->GetArrayLength(bytesObject);
    const jbyte* const bytes = app->env->GetByteArrayElements(bytesObject, nullptr);
    const std::string libDir(reinterpret_cast<const char*>(bytes), length);

Solution 4:

Stringlibpath= getApplicationInfo().nativeLibraryDir;

Class used: import android.content.pm.ApplicationInfo;

Solution 5:

StringlibraryPath= context.getFilesDir().getParentFile().getPath() + "/lib";

For better compatibility, use the following function:

@TargetApi(Build.VERSION_CODES.GINGERBREAD)publicstatic String getLibraryDirectory(Context context) {
    intsdk_level= android.os.Build.VERSION.SDK_INT;

    if (sdk_level >= Build.VERSION_CODES.GINGERBREAD) {
        return context.getApplicationInfo().nativeLibraryDir;
    } 
    elseif (sdk_level >= Build.VERSION_CODES.DONUT) {
        return context.getApplicationInfo().dataDir + "/lib";
    }

    return"/data/data/" + context.getPackageName() + "/lib";
}