从framework禁止apk启动广播动作

很多apk从AndroidManifest.xml中静态注册广播，但有时apk空指针没办法修改apk.

只能看log从framewrok去修改了.

E/AndroidRuntime( 7286): Caused by: java.lang.NullPointerException
E/AndroidRuntime( 7286): 	at com.example.sopinglibrary.main.wificheck.WifiBroadcast.onReceive(WifiBroadcast.java:29)
E/AndroidRuntime( 7286): 	at android.app.ActivityThread.handleReceiver(ActivityThread.java:2419)
E/AndroidRuntime( 7286): 	... 10 more

里会回调apk代码中的onReceive()函数.所以可以通过判断packagename过滤掉异常的Action.

经测试完全可行.

当然也可以在PMS解析时候过滤掉.

    private void handleReceiver(ReceiverData data) {
        // If we are getting ready to gc after going to the background, well
        // we are back active so skip it.
        unscheduleGcIdler();

        String component = data.intent.getComponent().getClassName();

        LoadedApk packageInfo = getPackageInfoNoCheck(
                data.info.applicationInfo, data.compatInfo);

        IActivityManager mgr = ActivityManagerNative.getDefault();

        BroadcastReceiver receiver;
        try {
            java.lang.ClassLoader cl = packageInfo.getClassLoader();
            data.intent.setExtrasClassLoader(cl);
            data.setExtrasClassLoader(cl);
            receiver = (BroadcastReceiver)cl.loadClass(component).newInstance();
        } catch (Exception e) {
            if (DEBUG_BROADCAST) Slog.i(TAG,
                    "Finishing failed broadcast to " + data.intent.getComponent());
            data.sendFinished(mgr);
            throw new RuntimeException(
                "Unable to instantiate receiver " + component
                + ": " + e.toString(), e);
        }

        try {
            Application app = packageInfo.makeApplication(false, mInstrumentation);

            if (localLOGV) Slog.v(
                TAG, "Performing receive of " + data.intent
                + ": app=" + app
                + ", appName=" + app.getPackageName()
                + ", pkg=" + packageInfo.getPackageName()
                + ", comp=" + data.intent.getComponent().toShortString()
                + ", dir=" + packageInfo.getAppDir());

            ContextImpl context = (ContextImpl)app.getBaseContext();
            sCurrentBroadcastIntent.set(data.intent);
            receiver.setPendingResult(data);
            receiver.onReceive(context.getReceiverRestrictedContext(),
                    data.intent);
        } catch (Exception e) {
            if (DEBUG_BROADCAST) Slog.i(TAG,
                    "Finishing failed broadcast to " + data.intent.getComponent());
            data.sendFinished(mgr);
            if (!mInstrumentation.onException(receiver, e)) {
                throw new RuntimeException(
                    "Unable to start receiver " + component
                    + ": " + e.toString(), e);
            }
        } finally {
            sCurrentBroadcastIntent.set(null);
        }

        if (receiver.getPendingResult() != null) {
            data.finish();
        }
    }

以后遇到类似问题，又多了一个思路.