Android app作为系统应用实现功能笔记

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);}