Android插件化开发，运行未安装apk中的Service

public class CJClassLoader extends DexClassLoader {
    //创建一个插件加载器集合，对固定的dex使用固定的加载器可以防止多个加载器同时加载一个dex造成的错误。
    private static final HashMap<String, CJClassLoader> pluginLoader = new HashMap<String, CJClassLoader>();
 
    protected CJClassLoader(String dexPath, String optimizedDirectory,
            String libraryPath, ClassLoader parent) {
        super(dexPath, optimizedDirectory, libraryPath, parent);
    }
 
    /**
     * 返回dexPath对应的加载器
     */
    public static CJClassLoader getClassLoader(String dexPath, Context cxt,
            ClassLoader parent) {
        CJClassLoader cjLoader = pluginLoader.get(dexPath);
        if (cjLoader == null) {
            // 获取到app的启动路径
            final String dexOutputPath = cxt
                    .getDir("dex", Context.MODE_PRIVATE).getAbsolutePath();
            cjLoader = new CJClassLoader(dexPath, dexOutputPath, null, parent);
            pluginLoader.put(dexPath, cjLoader);
        }
        return cjLoader;
    }
}

public interface I_CJService {
    IBinder onBind(Intent intent);
 
    void onCreate();
 
    int onStartCommand(Intent intent, int flags, int startId);
 
    void onDestroy();
 
    void onConfigurationChanged(Configuration newConfig);
 
    void onLowMemory();
 
    void onTrimMemory(int level);
 
    boolean onUnbind(Intent intent);
 
    void onRebind(Intent intent);
 
    void onTaskRemoved(Intent rootIntent);
}

//一个托管所类
class CJProxyService extends Service｛
    //采用包含关系
    protected I_CJService mPluginService; // 插件Service对象
｝

public class CJProxyService extends Service｛    
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        mPluginService.onConfigurationChanged(newConfig);
        super.onConfigurationChanged(newConfig);
    }
 
    @Override
    public void onLowMemory() {
        mPluginService.onLowMemory();
        super.onLowMemory();
    }
 
    @Override
    @SuppressLint("NewApi")
    public void onTrimMemory(int level) {
        mPluginService.onTrimMemory(level);
        super.onTrimMemory(level);
    }
 
    @Override
    public boolean onUnbind(Intent intent) {
        mPluginService.onUnbind(intent);
        return super.onUnbind(intent);
    }
 
    @Override
    public void onRebind(Intent intent) {
        mPluginService.onRebind(intent);
        super.onRebind(intent);
    }
｝

private void init(Intent itFromApp) {
 
        Object instance = null;
        try {
            Class<?> serviceClass;
            if (CJConfig.DEF_STR.equals(mDexPath)) {
                serviceClass = super.getClassLoader().loadClass(mClass);
            } else {
                serviceClass = this.getClassLoader().loadClass(mClass);
            }
            Constructor<?> serviceConstructor = serviceClass
                    .getConstructor(new Class[] {});
            instance = serviceConstructor.newInstance(new Object[] {});
        } catch (Exception e) {
        }
        setRemoteService(instance);
        mPluginService.setProxy(this, mDexPath);
    }
 
    /**
     * 保留一份插件Service对象
     */
    protected void setRemoteService(Object service) {
        if (service instanceof I_CJService) {
            mPluginService = (I_CJService) service;
        } else {
            throw new ClassCastException(
                    "plugin service must implements I_CJService");
        }
    }

//.......篇幅有限，部分截取
public abstract class CJService extends Service implements I_CJService {
    /**
     * that指针指向的是当前插件的Context（由于是插件化开发，this指针绝对不能使用）
     */
    protected Service that; // 替代this指针
 
    @Override
    public IBinder onBind(Intent intent) {
        if (mFrom == CJConfig.FROM_PLUGIN) {
            return null;
        } else {
            return that.onBind(intent);
        }
    }
}