插件化技术

// 代理Activity
class ProxyActivity : Activity() {
    private var pluginActivity: Activity? = null
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        // 加载插件Activity
        loadPluginActivity()
    }
    
    private fun loadPluginActivity() {
        // 加载插件
        val pluginPath = intent.getStringExtra("plugin_path")
        val className = intent.getStringExtra("class_name")
        
        // 创建插件ClassLoader
        val dexClassLoader = DexClassLoader(
            pluginPath,
            cacheDir.absolutePath,
            null,
            classLoader
        )
        
        // 加载插件Activity
        val pluginClass = dexClassLoader.loadClass(className)
        pluginActivity = pluginClass.newInstance() as Activity
    }
}

// 创建插件Resources
fun createPluginResources(pluginPath: String): Resources {
    val assetManager = AssetManager::class.java.newInstance()
    val addAssetPath = assetManager.javaClass.getMethod("addAssetPath", String::class.java)
    addAssetPath.invoke(assetManager, pluginPath)
    
    return Resources(
        assetManager,
        resources.displayMetrics,
        resources.configuration
    )
}