如何检查设备中是否已安装具有特定包名的应用程序[重复]

Question

是否有任何方法可以检查特定应用程序是否已安装在设备中？可能是通过某个包名？

当做

Answer 1

选中此项：

在检查应用程序的targetPackage中添加packagename。

public boolean isPackageExisted(String targetPackage){
        List<ApplicationInfo> packages;
        PackageManager pm;
            pm = getPackageManager();        
            packages = pm.getInstalledApplications(0);
            for (ApplicationInfo packageInfo : packages) {
        if(packageInfo.packageName.equals(targetPackage)) return true;
        }        
        return false;
    }

Answer 2

试着这样做：

public void checkApplication(String packageName) {
    PackageManager packageManager = getPackageManager();
    ApplicationInfo applicationInfo = null;
    try {
        applicationInfo = packageManager.getApplicationInfo(packageName, 0);
    } catch (NameNotFoundException e) {
        e.printStackTrace();
    }
    if (applicationInfo == null) {
        // not installed
    } else {
        // Installed
    }
}