Question

我正在创建一个应用程序。在这个应用程序中当用户注册所有该用户的联系人时将被邀请。我的问题是x有两个数字y说y1和y2.When x发送邀请y和y安装我的应用程序他/她的手机号码是y1.A之后不应该从x而是从他的任何联系人那里得到任何邀请。如何实现这一目标？

Answer 1

尝试使用该代码来了解您的应用是否已安装

     boolean isAppInstalled = appInstalledOrNot("com.check.application");  

    if(isAppInstalled) {
        //This intent will help you to launch if the package is already installed
        Intent LaunchIntent = getPackageManager()
            .getLaunchIntentForPackage("com.check.application");
        startActivity(LaunchIntent);

        Log.i("Application is already installed.");       
    } else {
        // Do whatever we want to do if application not installed
        // For example, Redirect to play store

        Log.i("Application is not currently installed.");
    }
}

private boolean appInstalledOrNot(String uri) {
    PackageManager pm = getPackageManager();
    try {
        pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
        return true;
    } catch (PackageManager.NameNotFoundException e) {
    }

    return false;
}

如何知道我的应用程序是否安装在手机上？

1 个答案: