Restructure project

app/shared/src/main/java/com/topjohnwu/magisk/utils/APKInstall.java

@@ -0,0 +1,29 @@
+package com.topjohnwu.magisk.utils;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Build;
+
+import com.topjohnwu.magisk.FileProvider;
+
+import java.io.File;
+
+public class APKInstall {
+    public static void install(Context c, File apk) {
+        c.startActivity(installIntent(c, apk));
+    }
+
+    public static Intent installIntent(Context c, File apk) {
+        Intent install = new Intent(Intent.ACTION_INSTALL_PACKAGE);
+        install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+        install.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            install.setData(FileProvider.getUriForFile(c, c.getPackageName() + ".provider", apk));
+        } else {
+            apk.setReadable(true, false);
+            install.setData(Uri.fromFile(apk));
+        }
+        return install;
+    }
+}

app/shared/src/main/java/com/topjohnwu/magisk/utils/CompoundEnumeration.java

@@ -0,0 +1,35 @@
+package com.topjohnwu.magisk.utils;
+
+import java.util.Enumeration;
+import java.util.NoSuchElementException;
+
+public class CompoundEnumeration<E> implements Enumeration<E> {
+    private Enumeration<E>[] enums;
+    private int index = 0;
+
+    @SafeVarargs
+    public CompoundEnumeration(Enumeration<E> ...enums) {
+        this.enums = enums;
+    }
+
+    private boolean next() {
+        while (index < enums.length) {
+            if (enums[index] != null && enums[index].hasMoreElements()) {
+                return true;
+            }
+            index++;
+        }
+        return false;
+    }
+
+    public boolean hasMoreElements() {
+        return next();
+    }
+
+    public E nextElement() {
+        if (!next()) {
+            throw new NoSuchElementException();
+        }
+        return enums[index].nextElement();
+    }
+}

app/shared/src/main/java/com/topjohnwu/magisk/utils/DynamicClassLoader.java

@@ -0,0 +1,60 @@
+package com.topjohnwu.magisk.utils;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.util.Enumeration;
+
+import dalvik.system.DexClassLoader;
+
+public class DynamicClassLoader extends DexClassLoader {
+
+    private ClassLoader base = Object.class.getClassLoader();
+
+    public DynamicClassLoader(File apk, ClassLoader parent) {
+        super(apk.getPath(), apk.getParent(), null, parent);
+    }
+
+    @Override
+    protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+        // First check if already loaded
+        Class cls = findLoadedClass(name);
+        if (cls != null)
+            return cls;
+
+        try {
+            // Then check boot classpath
+            return base.loadClass(name);
+        } catch (ClassNotFoundException ignored) {
+            try {
+                // Next try current dex
+                return findClass(name);
+            } catch (ClassNotFoundException fromSuper) {
+                try {
+                    // Finally try parent
+                    return getParent().loadClass(name);
+                } catch (ClassNotFoundException e) {
+                    throw fromSuper;
+                }
+            }
+        }
+    }
+
+    @Override
+    public URL getResource(String name) {
+        URL resource = base.getResource(name);
+        if (resource != null)
+            return resource;
+        resource = findResource(name);
+        if (resource != null)
+            return resource;
+        resource = getParent().getResource(name);
+        return resource;
+    }
+
+    @Override
+    public Enumeration<URL> getResources(String name) throws IOException {
+        return new CompoundEnumeration<>(base.getResources(name),
+                findResources(name), getParent().getResources(name));
+    }
+}