android develop log–enum activity and start activity

1.check has installed app

public static Boolean hasApp(String packageName, String className) {
        Boolean f = false;
        try {
            if ((null != className) && (className.length() > 0)) {
                if (null != PkrssActivity.s_pkrss.getPackageManager().getPackageInfo(packageName, 0))
                    f = true;
                return f;
            }

            try {
                PackageInfo pi = PkrssActivity.s_pkrss.getPackageManager().getPackageInfo(packageName, 0);

                Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
                resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
                resolveIntent.setPackage(pi.packageName);

                List<ResolveInfo> apps = PkrssActivity.s_pkrss.getPackageManager().queryIntentActivities(resolveIntent, 0);

                ResolveInfo ri = apps.iterator().next();
                if (ri != null) {
                    if (ri.activityInfo.name == className)
                        return true;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        } catch (Exception e) {

        }
        return f;
    }

2.enum installed application list

    private static JSONArray fetch_installed_apps() {
        List<ApplicationInfo> packages = PkrssActivity.s_pkrss.getPackageManager().getInstalledApplications(0);
        JSONArray ret = new JSONArray();
        Iterator<ApplicationInfo> l = packages.iterator();
        while (l.hasNext()) {
            try {
                ApplicationInfo app = (ApplicationInfo) l.next();
                String label = "";
                label = PkrssActivity.s_pkrss.getPackageManager().getApplicationLabel(app).toString();
                JSONObject obj = new JSONObject();
                obj.put("name", label); // app.name
                obj.put("id", app.packageName);

                obj.put("backupAgentName", app.backupAgentName);
                obj.put("className", app.className);
                obj.put("dataDir", app.dataDir);
                obj.put("descriptionRes", app.descriptionRes);
                obj.put("enabled", app.enabled);
                obj.put("flags", app.flags);
                obj.put("icon", app.icon);
                //obj.put("installLocation", app.installLocation);
                obj.put("labelRes", app.labelRes);
                //obj.put("logo", app.logo);
                obj.put("manageSpaceActivityName", app.manageSpaceActivityName);
                obj.put("metaData", app.metaData);
                //obj.put("name", (app.name!=null ? app.name : ""));
                //obj.put("nativeLibraryDir", app.nativeLibraryDir);
                obj.put("nonLocalizedLabel", app.nonLocalizedLabel);
                obj.put("packageName", app.packageName);
                obj.put("permission", app.permission);
                obj.put("processName", app.processName);
                obj.put("publicSourceDir", app.publicSourceDir);
                //obj.put("resourceDirs", app.resourceDirs());
                obj.put("sharedLibraryFiles", app.sharedLibraryFiles);
                obj.put("sourceDir", app.sourceDir);
                obj.put("targetSdkVersion", app.targetSdkVersion);
                obj.put("taskAffinity", app.taskAffinity);
                obj.put("theme", app.theme);
                obj.put("uid", app.uid);

                ret.put(obj);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return ret;
    }

3.enum activity in package

    private static JSONArray fetch_app_class(String packageName) {
        JSONArray ret = new JSONArray();

        PackageManager pManager =  PkrssActivity.s_pkrss.getPackageManager();
        PackageInfo packageInfo = pManager.getPackageArchiveInfo(packageName,PackageManager.GET_ACTIVITIES);
        ActivityInfo[] activityInfos = packageInfo.activities;
        ActivityInfo activityInfo;
        try{
            for(int i=0,c=activityInfos.length;i<c;++i){
                activityInfo = activityInfos[i];
                JSONObject obj = new JSONObject();
                obj.put("packageName", activityInfo.packageName);
                obj.put("name",activityInfo.name);
                ret.put(obj);
            }
        }catch (Exception e) {
            e.printStackTrace();
        }
        return ret;
    }

4.start activity by package name and class name

String packageName = args.getString(0);
            String className = args.optString(1);
            // openApp(packageName,className);

            Intent intent = new Intent();
            if(className.isEmpty() || (className=="null")){
                intent = PkrssActivity.s_pkrss.getPackageManager().getLaunchIntentForPackage(packageName);
            }else{
                intent = new Intent();
                intent.setClassName(packageName, className);
            }
            if(intent != null)
                PkrssActivity.s_pkrss.startActivity(intent);
            return true;

 

5.start activity by action name

String actionName = args.getString(0);
            Intent intent = new Intent();
            intent.setAction(actionName);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            PkrssActivity.s_pkrss.startActivity(intent);
            return true;

6.open url activity

    private static void openIntentUrl(String url) {
        if ((url == null) || (url.length() == 0))
            return;
        try {
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setData(Uri.parse(url));
            PkrssActivity.s_pkrss.startActivity(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

7.install apk by url

    public static void installWebApk(String url) {
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse(url), "application/vnd.android.package-archive");
        PkrssActivity.s_pkrss.startActivity(i);
    }