如何获取android中所有非系统应用程序的列表

Question

我正在开发一个应用程序,我希望获得所有非系统应用程序的列表.这是我的代码部分:

TextView tv = new TextView(this);
        this.setContentView(tv);

        ActivityManager actvityManager = (ActivityManager)
        this.getSystemService( ACTIVITY_SERVICE );
        PackageManager pm = this.getPackageManager();
        List<PackageInfo> list =pm.getInstalledPackages(0);

        for(int i=0;i<list.size();i++)
        {
            System.out.println("list"+i+"   "+list.get(i));
        }

        for(PackageInfo pi : list) 
        {
            try
            {
                ApplicationInfo ai=pm.getApplicationInfo(pi.packageName, 0);

                if (ai.sourceDir.startsWith("/data/app/"))
                {
                    tv.setText(ai.className);// non system apps
                }
                else 
                {
                     System.out.println("system apps");// system apps
                }
            }
            catch(Exception e)
            {
                e.printStackTrace();

            }
        }

但它显示,所有的应用程序作为系统应用程序

Answer 1

如果应用程序是非系统应用程序,则它必须具有启动Intent才能启动它.如果启动意图为null,那么它是一个系统App.

系统应用程序示例:"com.android.browser.provider","com.google.android.voicesearch".

对于上述应用程序,当您查询启动Intent时,您将获得NULL.

PackageManager pm = getPackageManager();
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
for(ApplicationInfo packageInfo:packages){
    if( pm.getLaunchIntentForPackage(packageInfo.packageName) != null ){
                String currAppName = pm.getApplicationLabel(packageInfo).toString();
               //This app is a non-system app
    }
    else{
        //System App
    }
}