Android 判断app是否安装

ydpl2007

于 2014-07-11 15:29:04 发布

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分类专栏： Android

本文链接：https://blog.youkuaiyun.com/ydpl2007/article/details/37696275

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本文提供了两种检查Android设备上特定应用程序是否已安装的方法，并通过示例展示了如何使用这些方法来验证应用的存在。

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private boolean isAppInstalled(Context context, String uri) {
        PackageManager pm = context.getPackageManager();
        boolean installed = false;
        try {
            pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
            installed = true;
        } catch (PackageManager.NameNotFoundException e) {
            installed = false;
        }
        return installed;
    }

2. public boolean isAppInstalled(Context context, String packageName) {
        final PackageManager packageManager = context.getPackageManager();
        List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
        List<String> pName = new ArrayList<String>();
        if (pinfo != null) {
            for (int i = 0; i < pinfo.size(); i++) {
                String pn = pinfo.get(i).packageName;
                pName.add(pn);
            }
        }
        return pName.contains(packageName);
    }

例子：

if (isInstallApp(MainActivity.this, "com.xxx")) {
                    System.out.println("Installed!!");
                } else {
                    System.out.println("Not installed!!");
                }