android手机遍历安装应用

/**
* 遍历程序列表，判断是否安装安全支付服务
*
* @return
*/
public boolean isMobile_spExist() {
PackageManager manager = mContext.getPackageManager();
List<PackageInfo> pkgList = manager.getInstalledPackages(0);
for (int i = 0; i < pkgList.size(); i++) {
PackageInfo pI = pkgList.get(i);
if (pI.packageName.equalsIgnoreCase("com.alipay.android.app"))
return true;
}

return false;
}