android檢測手機是否安裝某個app

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public static boolean isAvilible(Context context, String packageName){    //擷取packagemanager    final PackageManager packageManager = context.getPackageManager();    //擷取所有已安裝程式的包資訊    List<PackageInfo> packageInfos = packageManager.getInstalledPackages(0);    //用於儲存所有已安裝程式的包名    List<String> packageNames = new ArrayList<String>();    //從pinfo中將包名字逐一取出，壓入pName list中    if(packageInfos != null){        for(int i = 0; i < packageInfos.size(); i++){            String packName = packageInfos.get(i).packageName;            packageNames.add(packName);        }    }    //判斷packageNames中是否有目標程式的包名，有TRUE，沒有FALSE    return packageNames.contains(packageName);}

 

android檢測手機是否安裝某個app