无法确定Android设备上是否安装了Google Play商店

Question

这是检查设备上已安装软件包的简单问题...在我将操作系统升级到2.3.5之前,我可以使用以下代码找到Market/Play商店:

private static final String GooglePlayStorePackageName = "com.google.market";

void someMethod() {
    packageManager = getApplication().getPackageManager();
    List<PackageInfo> packages = packageManager.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
    for (PackageInfo packageInfo : packages) {
        if (packageInfo.packageName.equals(GooglePlayStorePackageName)) {
            googlePlayStoreInstalled = true;
            break;
        }
    }
}

由于某些原因在更新后,我根本无法找到包名称来指示应用程序已安装,虽然它在设备上,我可以访问市场.

包名称是否已更改？或者我正在以错误的方式看待这个？

谢谢,

亚当.

更新:

这是检查包是否安装的愚蠢方法...更好的方法是:

protected final boolean isPackageInstalled(String packageName) {
    try {
        application.getPackageManager().getPackageInfo(packageName, 0);
    } catch (NameNotFoundException e) {
        return false;
    }
    return true;
}

Answer 1

请注意,这个差不多5年的代码并不是最佳的,当您检查所有已安装的软件包时,Google并不喜欢这种代码.请检查其他答案.

包名已更改,现在是com.android.vending

尝试:

private static final String GooglePlayStorePackageNameOld = "com.google.market";
private static final String GooglePlayStorePackageNameNew = "com.android.vending";

void someMethod() {
    PackageManager packageManager = getApplication().getPackageManager();
    List<PackageInfo> packages = packageManager.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
    for (PackageInfo packageInfo : packages) {
        if (packageInfo.packageName.equals(GooglePlayStorePackageNameOld) ||
            packageInfo.packageName.equals(GooglePlayStorePackageNameNew)) {
            googlePlayStoreInstalled = true;
            break;
        }
    }
}

Answer 2

GooglePlayServices有一个实用程序类来处理这个问题,并提供适当的错误对话框,以根据设备中播放服务的状态显示.

API参考: http ://developer.android.com/reference/com/google/android/gms/common/GooglePlayServicesUtil.html

Answer 3

正如迈克尔在评论中所述,Google Play服务与Google Play商店不同.使用此选项可确定您的设备上是否安装了Play商店:

public static boolean isPlayStoreInstalled(Context context){
    try {
        context.getPackageManager()
                .getPackageInfo(GooglePlayServicesUtil.GOOGLE_PLAY_STORE_PACKAGE, 0);
        return true;
    } catch (PackageManager.NameNotFoundException e) {
        return false;
    }
}