Open source stub APK loader

Close #3537
2025-09-06 06:36:58 +00:00 · 2020-12-29 01:44:02 -08:00
parent 6b42db943d
commit 41a644afb9
14 changed files with 381 additions and 11 deletions
@@ -0,0 +1,79 @@
+package com.topjohnwu.magisk;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.app.AppComponentFactory;
+import android.app.Application;
+import android.app.Service;
+import android.content.BroadcastReceiver;
+import android.content.ContentProvider;
+import android.content.Intent;
+
+import com.topjohnwu.magisk.dummy.DummyProvider;
+import com.topjohnwu.magisk.dummy.DummyReceiver;
+import com.topjohnwu.magisk.dummy.DummyService;
+
+@SuppressLint("NewApi")
+public class DelegateComponentFactory extends AppComponentFactory {
+
+    ClassLoader loader;
+    AppComponentFactory delegate;
+
+    interface DummyFactory<T> {
+        T create();
+    }
+
+    public DelegateComponentFactory() {
+        InjectAPK.factory = this;
+    }
+
+    @Override
+    public Application instantiateApplication(ClassLoader cl, String className) {
+        if (loader == null) loader = cl;
+        return new DelegateApplication();
+    }
+
+    @Override
+    public Activity instantiateActivity(ClassLoader cl, String className, Intent intent)
+            throws ClassNotFoundException, IllegalAccessException, InstantiationException {
+        if (delegate != null)
+            return delegate.instantiateActivity(loader, className, intent);
+        return create(className, DownloadActivity::new);
+    }
+
+    @Override
+    public BroadcastReceiver instantiateReceiver(ClassLoader cl, String className, Intent intent)
+            throws ClassNotFoundException, IllegalAccessException, InstantiationException {
+        if (delegate != null)
+            return delegate.instantiateReceiver(loader, className, intent);
+        return create(className, DummyReceiver::new);
+    }
+
+    @Override
+    public Service instantiateService(ClassLoader cl, String className, Intent intent)
+            throws ClassNotFoundException, IllegalAccessException, InstantiationException {
+        if (delegate != null)
+            return delegate.instantiateService(loader, className, intent);
+        return create(className, DummyService::new);
+    }
+
+    @Override
+    public ContentProvider instantiateProvider(ClassLoader cl, String className)
+            throws ClassNotFoundException, IllegalAccessException, InstantiationException {
+        if (loader == null) loader = cl;
+        if (delegate != null)
+            return delegate.instantiateProvider(loader, className);
+        return create(className, DummyProvider::new);
+    }
+
+    /**
+     * Create the class or dummy implementation if creation failed
+     */
+    private <T> T create(String name, DummyFactory<T> factory) {
+        try {
+            return (T) loader.loadClass(name).newInstance();
+        } catch (Exception ignored) {
+            return factory.create();
+        }
+    }
+}