Android app作为系统应用实现功能笔记

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1.禁用StatusBar相关功能
需要添加权限

<uses-permission android:name="android.permission.STATUS_BAR"></uses-permission>

enum StatusBarCmd {
    DISABLE_EXPAND,
    DISABLE_NONE,
    DISABLE_RECENT,
    DISABLE_NOTIFICATION_ICONS
}

public static void disableStatusBar(Context context, StatusBarCmd cmd) {
    try {
            Object service = context.getSystemService("statusbar");
            Class<?> statusbarManager = Class.forName("android.app.StatusBarManager");
            Method disable = statusbarManager.getMethod("disable",int.class);
            disable.setAccessible(true);
            Field disable_expand = statusbarManager.getField(cmd.name());
            disable_expand.setAccessible(true);
            int disable_code  = disable_expand.getInt(statusbarManager);
            Log.d("YYY","disable code = "+disable_code);
            disable.invoke(service,disable_code);
    }catch (Exception ex) {
        ex.printStackTrace();
    }
}

  2.代码动态切换launcher

　需要权限

<uses-permission android:name="android.permission.FORCE_STOP_PACKAGES"></uses-permission>

private void switchLauncher(Context context,ComponentName activity) {
    PackageManager pm = context.getPackageManager();
    Log.d("YYY","switch launcher "+activity);
    try {
        Class<?> packageManager = Class.forName("android.content.pm.PackageManager");
        Method replacePreferedActivity = packageManager.getMethod("replacePreferredActivity",IntentFilter.class,int.class,ComponentName[].class,ComponentName.class);
        IntentFilter homeFilter = new IntentFilter(Intent.ACTION_MAIN);
        homeFilter.addCategory(Intent.CATEGORY_HOME);
        homeFilter.addCategory(Intent.CATEGORY_DEFAULT);

        List<ResolveInfo> resolveInfos = new ArrayList<ResolveInfo>();
        ComponentName curLauncher = listHomeActivitys(context,resolveInfos);
        if(resolveInfos != null && resolveInfos.size() > 0) {
            ComponentName[] componentNames = new ComponentName[resolveInfos.size()];
            for(int i =0 ; i<resolveInfos.size();i++) {
                ActivityInfo activityInfo = resolveInfos.get(i).activityInfo;
                if(activityInfo != null) {
                    ComponentName cn = new ComponentName(activityInfo.packageName, activityInfo.name);
                    componentNames[i] = cn;
                    Log.d("YYY","launcher:"+cn);
                }
            }
            replacePreferedActivity.setAccessible(true);
            replacePreferedActivity.invoke(pm,homeFilter,IntentFilter.MATCH_CATEGORY_EMPTY,componentNames,activity);
            killPackage(context,curLauncher.getPackageName());
        }else {
            Log.e("YYY","get home resolve info empty");
        }

    } catch (Exception e) {
        Log.e("YYY",""+e);
        e.printStackTrace();
    }

}

private ComponentName listHomeActivitys(Context context,List<ResolveInfo> outs){
    PackageManager pm = context.getPackageManager();
    Object cn = null;
    try {
        Class<?> packageManager = Class.forName("android.content.pm.PackageManager");
        Method getHomeActivities = packageManager.getMethod("getHomeActivities",List.class);
        getHomeActivities.setAccessible(true);
        cn = getHomeActivities.invoke(pm,outs);
    }catch (Exception e) {
        Log.e("YYY",""+e);
        e.printStackTrace();
    }
    return (ComponentName) cn;
}

private void killPackage(Context context,String pkg) {
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    am.killBackgroundProcesses(pkg);
}

Android app作为系统应用实现功能笔记

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原文地址：http://www.cnblogs.com/yao-blog/p/5761933.html