1、找到ActivityManagerService.java

在..\rk3229_5.1_box\frameworks\base\services\core\java\com\android\server\am目錄找到ActivityManagerService.java文件。在文件里找到startHomeActivityLocked函數(shù)里的setDefaultLauncher。

 boolean startHomeActivityLocked(int userId, String reason) {

        setDefaultLauncher(userId);

        if (mFactoryTest == FactoryTest.FACTORY_TEST_LOW_LEVEL
                && mTopAction == null) {
            // We are running in factory test mode, but unable to find
            // the factory test app, so just sit around displaying the
            // error message and don't try to start anything.
            return false;
        }
        Intent intent = getHomeIntent();
        ActivityInfo aInfo =
            resolveActivityInfo(intent, STOCK_PM_FLAGS, userId);
        if (aInfo != null) {
            intent.setComponent(new ComponentName(
                    aInfo.applicationInfo.packageName, aInfo.name));
            // Don't do this if the home app is currently being
            // instrumented.
            aInfo = new ActivityInfo(aInfo);
            aInfo.applicationInfo = getAppInfoForUser(aInfo.applicationInfo, userId);
            ProcessRecord app = getProcessRecordLocked(aInfo.processName,
                    aInfo.applicationInfo.uid, true);
            if (app == null || app.instrumentationClass == null) {
                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
                mStackSupervisor.startHomeActivity(intent, aInfo, reason);
            }
        }

        return true;
    }

2、設(shè)置開機(jī)默認(rèn)桌面包名

在setDefaultLauncher設(shè)置開機(jī)默認(rèn)桌面launch的包名。我開發(fā)的固件，所要啟動(dòng)的包名如下：

?? ??? ? String ?packageName = SystemProperties.get("persist.sys.yz.defpackage", "com.zhai.ads");
? ? ? ? ?String ?className = SystemProperties.get("persist.sys.yz.defclass", "com.zhai.touchhome.Loading");

    private void setDefaultLauncher(int userId)
    {
        // get default component
        //String  packageName = SystemProperties.get("persist.sys.yz.defpackage", "com.zhaisoft.app.hesiling");
       // String  className = SystemProperties.get("persist.sys.yz.defclass", "com.zhaisoft.app.hesiling.activity.MainActivity");
		
		 String  packageName = SystemProperties.get("persist.sys.yz.defpackage", "com.zhai.ads");
         String  className = SystemProperties.get("persist.sys.yz.defclass", "com.zhai.touchhome.Loading");
		
		
        Slog.i(TAG, "default packageName = " + packageName + ", default className = " + className);
        if(!packageName.equals("no") && !className.equals("no")){
            boolean firstLaunch = SystemProperties.getBoolean("persist.sys.sw.firstLaunch", true);
            Slog.d(TAG, "firstLaunch = " + firstLaunch);
            if(firstLaunch){
                mFirstLaunch = true;
                // do this only for the first boot
                SystemProperties.set("persist.sys.sw.firstLaunch", "false");
            }
            Slog.d(TAG, "mFirstLaunch = " + mFirstLaunch);
           // if(mFirstLaunch){
                IPackageManager pm = ActivityThread.getPackageManager();

                //clear the current preferred launcher
                ArrayList<IntentFilter> intentList = new ArrayList<IntentFilter>();
                ArrayList<ComponentName> cnList = new ArrayList<ComponentName>();
                mContext.getPackageManager().getPreferredActivities(intentList, cnList, null);
                IntentFilter dhIF;
                for(int i = 0; i < cnList.size(); i++)
                {
                    dhIF = intentList.get(i);
                    if(dhIF.hasAction(Intent.ACTION_MAIN) &&
                            dhIF.hasCategory(Intent.CATEGORY_HOME))
                    {
                        mContext.getPackageManager().clearPackagePreferredActivities(cnList.get(i).getPackageName());
                    }
                }

                // get all Launcher activities
                Intent intent = new Intent(Intent.ACTION_MAIN);
                intent.addCategory(Intent.CATEGORY_HOME);
                List<ResolveInfo> list = new ArrayList<ResolveInfo>();
                try
                {
                    list = pm.queryIntentActivities(intent,
                            intent.resolveTypeIfNeeded(mContext.getContentResolver()),
                            PackageManager.MATCH_DEFAULT_ONLY, userId);
                }catch (RemoteException e) {
                    throw new RuntimeException("Package manager has died", e);
                }
                // get all components and the best match
                IntentFilter filter = new IntentFilter();
                filter.addAction(Intent.ACTION_MAIN);
                filter.addCategory(Intent.CATEGORY_HOME);
                filter.addCategory(Intent.CATEGORY_DEFAULT);
                final int N = list.size();
                ComponentName[] set = new ComponentName[N];
                int bestMatch = 0;
                for (int i = 0; i < N; i++)
                {
                    ResolveInfo r = list.get(i);
                    set[i] = new ComponentName(r.activityInfo.packageName,
                            r.activityInfo.name);
                    if (r.match > bestMatch) bestMatch = r.match;
                }
                // add the default launcher as the preferred launcher
                ComponentName launcher = new ComponentName(packageName, className);
                try
                {
                    pm.addPreferredActivity(filter, bestMatch, set, launcher, userId);
                } catch (RemoteException e) {
                    throw new RuntimeException("Package manager has died", e);
                }
            //}
        }
    }

3、尋找HomeSettings.java

在..\rk3229_5.1_box\packages\apps\Settings\src\com\android\settings里尋找HomeSettings.java文件。在makeCurrentHome里第二次設(shè)置自己需要的桌面。主要是客戶有兩個(gè)桌面，需要頻繁切換。

    void makeCurrentHome(HomeAppPreference newHome) {
        if (mCurrentHome != null) {
            mCurrentHome.setChecked(false);
        }
        newHome.setChecked(true);
        mCurrentHome = newHome;

        mPm.replacePreferredActivity(mHomeFilter, IntentFilter.MATCH_CATEGORY_EMPTY,
                mHomeComponentSet, newHome.activityName);
	//huangxing add 
		System.out.println("huangxing----activityName== " + newHome.activityName);
		//ComponentName chatActivity =new ComponentName();
		
		String launcherInfo  = newHome.activityName.toString();
		System.out.println("huangxing----launcherInfo== " + launcherInfo);
		if(launcherInfo.indexOf("com.android.launcher3") != -1){
			SystemProperties.set("persist.sys.yz.defpackage", "com.android.launcher3");
			SystemProperties.set("persist.sys.yz.defclass", "com.android.launcher3.Launcher");
			System.out.println("huangxing---launcher3-----");
		}else if(launcherInfo.indexOf("com.zhai.ads") != -1){
			SystemProperties.set("persist.sys.yz.defpackage", "com.zhai.ads");
			SystemProperties.set("persist.sys.yz.defclass", "com.zhai.touchhome.Loading");
			System.out.println("huangxing---com.zhai.ads-----");
		}else {
			//wjz add
			System.out.println("huangxing---heshiling launcher-----");
			SystemProperties.set("persist.sys.yz.defpackage", "com.zhaisoft.app.hesiling");
			SystemProperties.set("persist.sys.yz.defclass", "com.zhaisoft.app.hesiling.activity.MainActivity");
			//SystemProperties.set("persist.sys.yz.defpackage", "com.zhai.ads");
			//SystemProperties.set("persist.sys.yz.defclass", "com.zhai.touchhome.Loading");
		}
        getActivity().setResult(Activity.RESULT_OK);
		
	
    }

4、在System.prop的文件里，設(shè)置默認(rèn)launcher

為了客戶定制更加靈活，后來在System.prop里設(shè)置了默認(rèn)launcher的參數(shù)。通過腳本配置，進(jìn)行一站式編譯。

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