系统级插件化？Google全新的动态化框架Android App Bundles分析

/**
     * Full paths to zero or more split APKs that, when combined with the base
     * APK defined in {@link #sourceDir}, form a complete application.
     */
    public String[] splitSourceDirs;

    /**
     * Full path to the publicly available parts of {@link #splitSourceDirs},
     * including resources and manifest. This may be different from
     * {@link #splitSourceDirs} if an application is forward locked.
     */
    public String[] splitPublicSourceDirs;

public ClassLoader getClassLoader() {
        synchronized (this) {
            if (mClassLoader != null) {
                return mClassLoader;
            }

            if (mIncludeCode && !mPackageName.equals("android")) {

                ......

                final ArrayList<String> zipPaths = new ArrayList<>();
                final ArrayList<String> libPaths = new ArrayList<>();

                .......

                zipPaths.add(mAppDir);
                //将split apk路径追加到zipPaths中
                if (mSplitAppDirs != null) {
                    Collections.addAll(zipPaths, mSplitAppDirs);
                }

                libPaths.add(mLibDir);

                ......

                final String zip = TextUtils.join(File.pathSeparator, zipPaths);
                final String lib = TextUtils.join(File.pathSeparator, libPaths);

                ......
                //如果mSplitAppDirs不为空，则zip将包含split apps所有路径。
                mClassLoader = ApplicationLoaders.getDefault().getClassLoader(zip, lib,
                        mBaseClassLoader);

                StrictMode.setThreadPolicy(oldPolicy);
            } else {
                if (mBaseClassLoader == null) {
                    mClassLoader = ClassLoader.getSystemClassLoader();
                } else {
                    mClassLoader = mBaseClassLoader;
                }
            }
            return mClassLoader;
        }
    }

public Resources getResources(ActivityThread mainThread) {
        if (mResources == null) {
            mResources = mainThread.getTopLevelResources(mResDir, mSplitResDirs, mOverlayDirs,
                    mApplicationInfo.sharedLibraryFiles, Display.DEFAULT_DISPLAY, null, this);
        }
        return mResources;
    }

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        manager = SplitInstallManagerFactory.create(this)
        initializeViews()
        val installedList = manager.installedModules.toList()
        for (item in installedList) {
            toastAndLog("installed module : " + item.toString())
        }
        val splits = applicationInfo.splitSourceDirs
        for ( item in splits) {
            toastAndLog("split dir : " + item.toString())
        }
    }

D/DynamicFeatures: installed module : native
D/DynamicFeatures: installed module : java
D/DynamicFeatures: installed module : kotlin
D/DynamicFeatures: installed module : assets
D/DynamicFeatures: split dir : /data/app/com.google.android.samples.dynamicapps.ondemand-1/split_assets.apk
D/DynamicFeatures: split dir : /data/app/com.google.android.samples.dynamicapps.ondemand-1/split_java.apk
D/DynamicFeatures: split dir : /data/app/com.google.android.samples.dynamicapps.ondemand-1/split_kotlin.apk
D/DynamicFeatures: split dir : /data/app/com.google.android.samples.dynamicapps.ondemand-1/split_native.apk

Set<String> getInstalledModules();

private final String[] a() {
        try {
            PackageInfo var1;
            return (var1 = this.d.getPackageManager().getPackageInfo(this.e, 0)) != null ? var1.splitNames : null;
        } catch (NameNotFoundException var2) {
            a.c("App is not found in PackageManager", new Object[0]);
            return null;
        }
    }

public class SplitCompatApplication extends Application {
    public SplitCompatApplication() {
    }

    protected void attachBaseContext(Context var1) {
        super.attachBaseContext(var1);
        SplitCompat.install(this);
    }
}

public static a a() {
        if (VERSION.SDK_INT == 21) {
        //com.google.android.play.core.splitcompat.b.c
            return new c();
        } else if (VERSION.SDK_INT == 22) {
        //com.google.android.play.core.splitcompat.b.f
            return new f();
        } else if (VERSION.SDK_INT == 23) {
        //com.google.android.play.core.splitcompat.b.g
            return new g();
        } else {
            throw new AssertionError();
        }
    }

public static void updateAppInfo(Context var0) {
        if (VERSION.SDK_INT > 25) {
            a.a("Calling dispatchPackageBroadcast!", new Object[0]);

            try {
                Class var1;
                Method var2;
                (var2 = (var1 = Class.forName("android.app.ActivityThread")).getMethod("currentActivityThread")).setAccessible(true);
                Object var3 = var2.invoke((Object)null);
                Field var4;
                (var4 = var1.getDeclaredField("mAppThread")).setAccessible(true);
                Object var5;
                (var5 = var4.get(var3)).getClass().getMethod("dispatchPackageBroadcast", Integer.TYPE, String[].class).invoke(var5, 3, new String[]{var0.getPackageName()});
                a.a("Calling dispatchPackageBroadcast", new Object[0]);
            } catch (Exception var6) {
                a.a(var6, "Update app info with dispatchPackageBroadcast failed!", new Object[0]);
            }
        }
    }