[app]Android判断包名对应的APP是否存在

protected boolean isAppExist(String pkgName) {
    ApplicationInfo info;
    try {
        info = getPackageManager().getApplicationInfo(pkgName, 0);
    }
    catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
        info = null;
    }
    return info != null;
}