package pl.droidsonroids.gif;
import android.annotation.SuppressLint;
import android.content.Context;
import android.support.annotation.NonNull;
import java.lang.reflect.Method;
/**
* Helper used to work around native libraries loading on some systems.
* See <a href="https://medium.com/keepsafe-engineering/the-perils-of-loading-native-libraries-on-android-befa49dce2db">ReLinker</a> for more details.
*/
public class LibraryLoader {
static final String SURFACE_LIBRARY_NAME = "pl_droidsonroids_gif_surface";
static final String BASE_LIBRARY_NAME = "pl_droidsonroids_gif";
@SuppressLint("StaticFieldLeak") //workaround for Android bug
private static Context sAppContext;
private LibraryLoader() {
}
/**
* Initializes loader with given `Context`. Subsequent calls should have no effect since application Context is retrieved.
* Libraries will not be loaded immediately but only when needed.
*
* @param context any Context except null
*/
public static void initialize(@NonNull final Context context) {
sAppContext = context.getApplicationContext();
}
private static Context getContext() {
if (sAppContext == null) {
try {
final Class<?> activityThread = Class.forName("android.app.ActivityThread");
final Method currentApplicationMethod = activityThread.getDeclaredMethod("currentApplication");
sAppContext = (Context) currentApplicationMethod.invoke(null);
} catch (Exception e) {
throw new IllegalStateException("LibraryLoader not initialized. Call LibraryLoader.initialize() before using library classes.", e);
}
}
return sAppContext;
}
static void loadLibrary(Context context) {
try {
System.loadLibrary(BASE_LIBRARY_NAME);
} catch (final UnsatisfiedLinkError e) {
if (context == null) {
context = getContext();
}
ReLinker.loadLibrary(context);
}
}
}