PackageManager獲取已經安裝應用的包名

//是否安裝抖音
PackageManager packageManager = mContext.getPackageManager();
try {
//這個是獲取指定應用的PackageInfo信息。
     packageManager.getPackageInfo("com.ss.android.ugc.aweme",
            PackageManager.GET_ACTIVITIES);
} catch (PackageManager.NameNotFoundException e) {
    e.printStackTrace();
    shareTrill.setVisibility(View.GONE);
}

/ /這個是獲取所有包的list

List<PackageInfo> listPack = packageManager.getInstalledPackages(PackageManager.GET_ACTIVITIES);