Question

有没有办法检查Android应用程序是否通过另一个Android应用程序安装在设备中，即使用户已将其从他/她的Android设备中删除

例如： - 让我们假设一个用户安装了Android应用程序A并将其从他/她的设备中删除。现在我已经安装了一个Android应用程序B.如果用户安装了应用程序A，那么有没有办法检查应用程序B

Answer 1

please try this method its return whether application is install or not but just you need to pass package name of your app.

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

Answer 2

试试这个......

final PackageManager packageManager = getPackageManager();
    List<ApplicationInfo> AppPackages = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);
    for (ApplicationInfo AppPackageInfo : AppPackages) {
        Log.d(TAG, "Installed App Package :" + AppPackageInfo.packageName);
        Log.d(TAG, "Launch Activity :" + packageManager.getLaunchIntentForPackage(AppPackageInfo.packageName));
    }

<强>已更新

    private boolean isAppInstalled(String appPackage) {
    boolean isAppExists = false;
    PackageManager packageManager = getPackageManager();
    List<ApplicationInfo> AppPackages = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);
    for (ApplicationInfo appPackageInfo : AppPackages) {
        if (appPackageInfo.packageName.equalsIgnoreCase(appPackage)) {
            isAppExists = true;
            break;
        } else {
            isAppExists = false;
        }
    }
    return isAppExists;
}

在这里，您需要使用应用程序包名称（您想知道的应用程序）调用该方法

如何安装Android应用程序，即使它已从设备中删除

2 个答案: