怎么判断已经安装了某个应用

分类：Native.js

看到网上android代码判断某个应用是否安装用:
PackageInfo packageInfo=this.getPackageManager().getPackageInfo(packageName, 0);
但是用nativeJs:
var mainActivity = plus.android.runtimeMainActivity();
try{
var PackageManager = plus.android.importClass("android.content.pm.PackageManager");
packageInfo = context.getPackageManager().getApplicationInfo(packageName, PackageManager.GET_UNINSTALLED_PACKAGES);
}catch(e){
console.log(e)
}

报找不到方法getApplicationInfo

Uncaught TypeError: Object #<h> has no method 'getContext'

2015-09-14 13:09 负责人:无分享