SWT 重啓案例分析（五）

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本篇文章主要介紹 Android 開發中的部分知識點，通過閱讀本篇文章，您將收穫以下內容:

一、Service not registered 異常導致手機重啓
二、Service not registered 解決方案
2.1 修改ContextImpl類
2.2 修改 TransportManager 類

一、Service not registered 異常導致手機重啓

重啓 的部分Log如下：

二、Service not registered 解決方案

從 Log 中分析發現異常信息，並嘗試進行如下修改。

1.修改ContextImpl類

文件路徑如下：
\frameworks\base\core\java\android\app\ContextImpl.java文件

優化unbindService方法實現如下：

    @Override
    public void unbindService(ServiceConnection conn) {
        if (conn == null) {
            throw new IllegalArgumentException("connection is null");
        }
        if (mPackageInfo != null) {
            IServiceConnection sd = mPackageInfo.forgetServiceDispatcher(
                    getOuterContext(), conn);
            try {
                ActivityManager.getService().unbindService(sd);
            } catch (RemoteException e) {
                throw e.rethrowFromSystemServer();
            // add for Service not registered unbindService() triger reboot exception
            } catch (IllegalArgumentException e) {
                //com.google.android.gms.ui Service not registered Crash
                android.util.Log.e("wjwj","---ContextImpl GMS Crash---");
                e.printStackTrace();
             }
             // add for Service not registered unbindService() triger reboot exception
        } else {
            throw new RuntimeException("Not supported in system context");
        }
    }

2.修改 TransportManager 類

文件路徑如下：
frameworks\base\services\backup\java\com\android\server\backup\TransportManager.java 將異常捕獲，防止重啓。

優化unbindService方法實現如下：

    void onPackageRemoved(String packageName) {
        // Package removed. Remove all its transports from our list. These transports have already
        // been removed from mBoundTransports because onServiceDisconnected would already been
        // called on TransportConnection objects.
        synchronized (mTransportLock) {
            Iterator<Map.Entry<ComponentName, TransportConnection>> iter =
                    mValidTransports.entrySet().iterator();
            while (iter.hasNext()) {
                Map.Entry<ComponentName, TransportConnection> validTransport = iter.next();
                ComponentName componentName = validTransport.getKey();
                if (componentName.getPackageName().equals(packageName)) {
                    TransportConnection transportConnection = validTransport.getValue();
                    iter.remove();
                    if (transportConnection != null) {
                        /* 360OS begin */
                        /* unbindService() triger reboot exception,
                         * catch it && add log to find out witch package do it. */
                        try {
                            Slog.d(TAG, "onPackageRemoved trace, componentName:"
                                + componentName.toString(), new Throwable());
                            mContext.unbindService(transportConnection);
                        } catch (IllegalArgumentException e) {
                            Slog.e(TAG, "unbindService fail.", e);
                        }
                        /* 360OS end */
                        log_verbose("Package removed, removing transport: "
                                + componentName.flattenToShortString());
                    }
                }
            }
        }
    }

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