判断手机是否含有指定软件

* 检查手机上是否安装了指定的软件

* @param context

* @param packageName：应用包名

* @return

*/

public static boolean isAvilible(Context context, String packageName){

//获取packagemanager

final PackageManager packageManager = context.getPackageManager();

//获取所有已安装程序的包信息

List<PackageInfo> packageInfos = packageManager.getInstalledPackages(0);

//用于存储所有已安装程序的包名

List<String> packageNames = new ArrayList<String>();

//从pinfo中将包名字逐一取出，压入pName list中

if(packageInfos != null){

for(int i = 0; i < packageInfos.size(); i++){

String packName = packageInfos.get(i).packageName;

packageNames.add(packName);

}

}

//判断packageNames中是否有目标程序的包名，有TRUE，没有FALSE

return packageNames.contains(packageName);

}