如何在Android中获取已安装的应用程序名称? [英] How to get installed application name in android?

问题描述

我做了一个小方法来在android中显示已安装的应用程序名称.但是当我给名称"属性显示异常错误.当我输入"packageName"时，该方法会完美执行并在列表中显示软件包名称

I have made a small method to display the installed application name in android. But when i give "name" attribute its showing exception error. And when i give "packageName" the method executes perfectly and displays the package name in a list

private void getInstalledApps() {
    // TODO Auto-generated method stub
     PackageManager packageManager=this.getPackageManager();
        List<ApplicationInfo applist=packageManager.getInstalledApplications(0);


        Iterator<ApplicationInfo> it=applist.iterator();
        while(it.hasNext()){
            ApplicationInfo pk=(ApplicationInfo)it.next();

            String appname=pk.name.toString();

            installedapplist.add(appname);
        }

}

在上面的代码中，当我给出String appname=pk.packageName.toString()时，它工作正常，但是当我给出String appname=pk.name.toString()时，程序将引发异常错误.请帮助我解决问题.

In the above code when i give String appname=pk.packageName.toString() it works fine but when I give String appname=pk.name.toString() the program is throwing an exception error. Please help me to sort out the problem.

推荐答案

我的猜测是您的代码正在抛出NullPointerException，因为name字段为null.无论如何，您可能想要的是:

My guess is your code is throwing a NullPointerException because the name field is null. In any event, what you probably want is:

String appname = packageManager.getApplicationLabel(pk).toString()

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