小编Sha*_*ake的帖子

这是我的工具栏xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    app:contentInsetEnd="0dp"
    app:contentInsetStart="0dp"
    android:layout_height="@dimen/toolbar_height"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    android:background="@color/primary_color">



</android.support.v7.widget.Toolbar>

我想以 编程方式更改 app:theme.我该怎么做呢？

上下文菜单与弹出菜单与底页之间有什么区别？以及他们最适合的情况是什么？

我是python和机器学习的初学者.当我尝试将数据放入statsmodels.formula.api时,我得到以下错误OLS.fit()

Traceback(最近一次调用最后一次):

文件"",第47行,在regressor_OLS = sm.OLS(y,X_opt).fit()

文件 "E:\蟒蛇\ LIB \站点包\ statsmodels \回归\ linear_model.py",线190,在配合self.pinv_wexog,singular_values = pinv_extended(self.wexog)

文件"E:\ Anaconda\lib\site-packages\statsmodels\tools\tools.py",第342行,在pinv_extended u,s,vt = np.linalg.svd(X,0)

文件 "E:\蟒蛇\ LIB \站点包\numpy的\ linalg\linalg.py",线1404,在SVD U,S,VT = gufunc(一,签名=签名,extobj = extobj)

TypeError:找不到与指定签名匹配的循环,并为ufunc svd_n_s找到了强制转换

码

#Importing Libraries
import numpy as np # linear algebra
import pandas as pd # data processing
import matplotlib.pyplot as plt #Visualization


#Importing the dataset
dataset = pd.read_csv('Video_Games_Sales_as_at_22_Dec_2016.csv')
#dataset.head(10) 

#Encoding categorical data using panda get_dummies function . Easier and straight forward than OneHotEncoder in sklearn
#dataset = pd.get_dummies(data = …

我使用gridview CHOICE_MODE_MULTIPLE_MODAL在我的gridview中选择多个项目(图像).

我曾经MultiChoiceModeListener实现这一点,问题是所选项目没有得到突出显示

选择器xml:

 <?xml version="1.0" encoding="utf-8"?>
   <selector xmlns:android="http://schemas.android.com/apk/res/android" >
   <item android:state_selected="true" android:drawable="@color/green"/>
   <item android:state_pressed="true" 
          android:drawable="@color/blue"/> <!-- pressed state -->
   <item android:state_focused="true" 
          android:drawable="@color/blue"/> <!-- focused state -->
   <item android:drawable="@android:color/transparent"/> <!-- default state --> 

   </selector>

当我触摸一个项目时,它会被蓝色覆盖(我认为这发生在我使用过的bcoz gridView.setDrawSelectorOnTop(true);)......一旦我抬起手指,蓝色就会被移除.

我希望所选项目highlighted具有semi transparent blue颜色,并且应该保持突出显示,直到我取消选择该项目.

Java代码:

public class HappyFragment extends ParentFragment {

    public HappyImageAdapter imageAdapter;
    private List<ResolveInfo> mApps;
    GridView gridView;

     public static HappyFragment newInstance() {
         HappyFragment fragment = new HappyFragment();
         return fragment;
     }

     @Override
     public void onCreate(Bundle savedInstanceState) …

有什么区别,

getWindow().setWindowAnimations()

和

Activity.overridePendingTransition()

似乎两者都具有相同的功能.

我想将我的 Spring Boot 应用程序连接到 2 个数据库。因此，根据教程，我创建了 2 个配置类。

配置类 1

@Configuration
@EnableTransactionManagement
@PropertySource({ "classpath:database-configs.properties" })
@EnableJpaRepositories(
        basePackages = {"com.dialog.pod.ideabiz_admin.data_access_objects"},
        entityManagerFactoryRef = "adminEntityManagerFactory",
        transactionManagerRef = "adminTransactionManager")
public class IdeabizAdminConfig {


    @Autowired
    private Environment env;


    @Bean
    PlatformTransactionManager adminTransactionManager() {
        return new JpaTransactionManager(adminEntityManagerFactory().getObject());
    }

    @Bean
    LocalContainerEntityManagerFactoryBean adminEntityManagerFactory() {

        HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
       // jpaVendorAdapter.setGenerateDdl(true);

        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();

        factoryBean.setDataSource(adminDataSource());
        factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        factoryBean.setPackagesToScan("com.dialog.pod.ideabiz_admin.models");
        factoryBean.setJpaPropertyMap(jpaProperties());
        factoryBean.setPersistenceUnitName("adminDataSource");
        return factoryBean;
    }

    @Bean
    DataSource adminDataSource() {

        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(env.getProperty("admin.jdbc.driverClassName"));
        dataSource.setUrl(env.getProperty("admin.jdbc.url"));
        dataSource.setUsername(env.getProperty("admin.jdbc.username"));
        dataSource.setPassword(env.getProperty("admin.jdbc.password"));

        return dataSource; …

如何取消注册附加到LocalBroadcastManager的接收器？

我试过了

unregisterReceiver(broadcastReceiver);

但它给了我一个例外

java.lang.IllegalArgumentException:Receiver未注册:

这是我的代码

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    init();
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    LocalBroadcastManager.getInstance(this).registerReceiver(broadcastReceiverCancelPd, new IntentFilter(PelicanApplication.identifierCancelPd));
    LocalBroadcastManager.getInstance(this).registerReceiver(bReceiverSignOut, new IntentFilter(PelicanApplication.identifierSignOut));
    LocalBroadcastManager.getInstance(this).registerReceiver(bReceiverNearByDeliveries, new IntentFilter(PelicanApplication.identifierNBD));
}


@Override
protected void onStop() {
    super.onStop();
    unregisterReceiver(broadcastReceiverCancelPd);
    unregisterReceiver(bReceiverSignOut);
    unregisterReceiver(bReceiverNearByDeliveries);
}

当我在 intellij Idea 中运行 maven build 命令时，一切正常。但是，当我尝试使用 Maven 控制台在没有 IDE 的情况下运行“mvn clean package”时，我收到一条错误消息，指出无法解析持久性单元。

我正在尝试构建一个 bash 文件，其中应用程序 jar 可以自动构建和运行。这就是为什么我需要在没有 IDE 的情况下运行“mvn clean package”

错误日志

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: Unable to resolve persistence unit root URL
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1081) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:856) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
        at …

从@RequestHeaderannotation读取 header 数据与从annotation读取头数据有什么区别HttpServletRequest？