修复插件中判断当前进程名时错误的问题

Author: limpoxe

PluginCore/src/com/plugin/core/PluginContextTheme.java

@@ -7,6 +7,7 @@
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
 import android.content.res.AssetManager;
 import android.content.res.Resources;
 import android.database.DatabaseErrorHandler;
@@ -33,6 +34,8 @@ public class PluginContextTheme extends PluginBaseContextWrapper {
 
 	private ArrayList<BroadcastReceiver> receivers = new ArrayList<BroadcastReceiver>();
 
+	private boolean crackPackageManager = false;
+
 	public PluginContextTheme(PluginDescriptor pluginDescriptor,
 							  Context base, Resources resources,
 							  ClassLoader classLoader) {
@@ -238,4 +241,16 @@ public void unregisterAllReceiver() {
 		}
 		receivers.clear();
 	}
+
+	@Override
+	public PackageManager getPackageManager() {
+		if (crackPackageManager) {
+			return null;
+		}
+		return super.getPackageManager();
+	}
+
+	public void setCrackPackageManager(boolean crackPackageManager) {
+		this.crackPackageManager = crackPackageManager;
+	}
 }

PluginCore/src/com/plugin/core/PluginLauncher.java

@@ -135,14 +135,12 @@ private Application callPluginApplicationOnCreate(Context pluginContext, DexClas
 
 		try {
 			LogUtil.d("创建插件Application", pluginDescriptor.getApplicationName());
-			//阻止自动安装multidex
-			try {
-				Class mulitDex = classLoader.loadClass("android.support.multidex.MultiDex");
-				RefInvoker.setFieldObject(null, mulitDex, "IS_VM_MULTIDEX_CAPABLE", true);
-			} catch (Exception e) {
-			}
+			//阻止自动安装multidex， 如果插件application对象的attachContext
+			//方法中使用了packagemanager， 这里会导致异常
+			((PluginContextTheme)pluginContext).setCrackPackageManager(true);
 			application = Instrumentation.newApplication(classLoader.loadClass(pluginDescriptor.getApplicationName()),
 					pluginContext);
+			((PluginContextTheme)pluginContext).setCrackPackageManager(false);
 		} catch (ClassNotFoundException e) {
 			e.printStackTrace();
 		} 	catch (InstantiationException e) {

PluginCore/src/com/plugin/core/PluginLoader.java

@@ -13,6 +13,7 @@
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
+import android.util.Log;
 
 import com.plugin.content.LoadedPlugin;
 import com.plugin.content.PluginDescriptor;
@@ -53,11 +54,15 @@ public static synchronized void initLoader(Application app) {
 			isLoaderInited = true;
 			sApplication = app;
 
+			//这里的isPluginProcess方法需要在安装AndroidAppIActivityManager之前执行。
+			//原因见AndroidAppIActivityManager的getRunningAppProcesses()方法
+			boolean isPluginProcess = ProcessUtil.isPluginProcess();
+
 			AndroidAppIActivityManager.installProxy();
 			AndroidAppINotificationManager.installProxy();
 			AndroidAppIPackageManager.installProxy(sApplication.getPackageManager());
 
-			if (ProcessUtil.isPluginProcess()) {
+			if (isPluginProcess) {
 				AndroidWidgetToast.installProxy();
 				AndroidViewLayoutInflater.installPluginCustomViewConstructorCache();
 				//不可在主进程中同步安装，因为此时ActivityThread还没有准备好, 会导致空指针。
@@ -73,7 +78,7 @@ public void run() {
 			PluginInjector.injectInstrumentation();
 			PluginInjector.injectBaseContext(sApplication);
 
-			if (ProcessUtil.isPluginProcess()) {
+			if (isPluginProcess) {
 				Iterator<PluginDescriptor> itr = PluginManagerHelper.getPlugins().iterator();
 				while (itr.hasNext()) {
 					PluginDescriptor plugin = itr.next();

PluginCore/src/com/plugin/core/systemservice/AndroidAppIActivityManager.java

@@ -1,16 +1,20 @@
 package com.plugin.core.systemservice;
 
+import android.app.ActivityManager;
 import android.content.Intent;
 
 import com.plugin.content.PluginDescriptor;
+import com.plugin.core.PluginLoader;
 import com.plugin.core.proxy.MethodDelegate;
 import com.plugin.core.proxy.MethodProxy;
 import com.plugin.core.proxy.ProxyUtil;
 import com.plugin.util.LogUtil;
 import com.plugin.util.NotificationHelper;
+import com.plugin.util.ProcessUtil;
 import com.plugin.util.RefInvoker;
 
 import java.lang.reflect.Method;
+import java.util.List;
 
 /**
  * Created by cailiming on 16/1/15.
@@ -43,11 +47,25 @@ public static void installProxy() {
 
     //public List<RunningAppProcessInfo> getRunningAppProcesses()
     public static class getRunningAppProcesses extends MethodDelegate {
+
         @Override
-        public Object beforeInvoke(Object target, Method method, Object[] args) {
-            LogUtil.e("beforeInvoke", method.getName());
-            //TODO 需要时再说
-            return super.beforeInvoke(target, method, args);
+        public Object afterInvoke(Object target, Method method, Object[] args, Object beforeInvoke, Object invokeResult) {
+            LogUtil.e("afterInvoke", method.getName());
+            //由于插件运行在插件进程中，这里需要欺骗插件，让插件的中判断进程的逻辑以为当前是在主进程中运行
+            //但是这会导致插件框架也无法判断当前的进程了，因此框架中判断插件进程的方法一定要在安装ActivityManager代理之前执行并记住状态
+            //同时要保证主进程能正确判断进程。
+            //这里不会导致无限递归，因为ProcessUtil.isPluginProcess方法内部有缓存，再安装ActivityManager代理之前已经执行并缓存了
+            if (ProcessUtil.isPluginProcess()) {
+                List<ActivityManager.RunningAppProcessInfo> result = (List<ActivityManager.RunningAppProcessInfo>)invokeResult;
+                for (ActivityManager.RunningAppProcessInfo appProcess : result) {
+                    if (appProcess.pid == android.os.Process.myPid()) {
+                        appProcess.processName = PluginLoader.getApplication().getPackageName();
+                        break;
+                    }
+                }
+            }
+
+            return super.afterInvoke(target, method, args, beforeInvoke, invokeResult);
         }
     }