实体类 AppInfo

public class AppInfo {
    public String name;
    public String packageName;
    public Drawable icon;
    public boolean isRom; //true表示安装在手机内存
    public boolean isUser; //true表示用户应用
}

获取已安装应用列表

public ArrayList<AppInfo> getInstallApps(Context context){
    PackageManager pm = context.getPackageManager();
    List<PackageInfo> installedPackages = pm.getInstalledPackages(0);  //获取所以已安装的包

    ArrayList<AppInfo> list = new ArrayList<AppInfo>();
    for( PackageInfo packageInfo : installedPackages){
        AppInfo info = new AppInfo();
        String packageName = packageInfo.packageName;  //包名
        ApplicationInfo applicationInfo = packageInfo.applicationInfo;  //应用信息
        String name = applicationInfo.loadLabel(pm).toString();  //应用名称
        Drawable icon = applicationInfo.loadIcon(pm);  //应用图标

        info.name = name;
        info.packageName = packageName;
        info.icon = icon;

        //状态机,通过01状态来表示是否具备某些属性和功能
        int flags = applicationInfo.flags;  //获取应用标记
        if((flags & ApplicationInfo.FLAG_EXTERNAL_STORAGE) == ApplicationInfo
                .FLAG_EXTERNAL_STORAGE){
            //安装在sdcard
            info.isRom = false;

        }else{
            //安装在手机
            info.isRom = true;
        }

        if((flags & ApplicationInfo.FLAG_SYSTEM) == ApplicationInfo
                .FLAG_SYSTEM){
            //系统应用
            info.isUser = false;

        }else{
            //用户应用
            info.isUser = true;
        }


        list.add(info);
    }

    return list;
}