I need to change the returned value of a sequence stored into a H2DB, when i call nextVal through a direct SQL query H2 return a BigInt and i need a BigDecimal. I can't cast or convert this value, I need H2 returning a BigDecimal. How I can do that? EDIT: I can't change the Java code beacuse I'm testing so cast or convert the request value from DB is not a option. You could cr
我需要改变存储在H2DB中的序列的返回值，当我通过直接的SQL查询调用nextVal时H2返回BigInt，我需要一个BigDecimal。 我不能转换或转换这个值，我需要H2返回一个BigDecimal。 我该怎么做？ 编辑：我不能改变Java代码因为我测试所以转换或从数据库转换请求值不是一个选项。 如果您允许替换H2 jar文件，您可以创建自己的补丁H2版本。 在org.h2.expression.Function改变 addFunctionNotDeterministic("NEXTVAL", NEXTV
I have set up four tabs that each hold a listview, I have added code in the listview java file to make the lists transparent, however, I have a semi transparent grey box covering 75% of the screen and I cannot figure out why, I have a background on my other listviews and they are completely transparent, but the lists within the tabhost have the grey box. <?xml version="1.0" encoding="utf-8"?&
我已经设置了四个选项卡，每个选项卡都有一个列表视图，我在listview java文件中添加了代码以使列表透明，但是，我有一个覆盖屏幕75％的半透明灰色框，我无法弄清楚为什么，我在我的其他列表视图上有一个背景，并且它们是完全透明的，但tabhost中的列表具有灰色框。 <?xml version="1.0" encoding="utf-8"?> android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent">
I am trying to work on sending an object of my customer class from one Activity and display it in another Activity . The code for the customer class: public class Customer { private String firstName, lastName, Address; int Age; public Customer(String fname, String lname, int age, String address) { firstName = fname; lastName = lname; Age = age; Ad
我正在尝试从一个Activity发送客户类的对象，并将其显示在另一个Activity 。 客户类的代码： public class Customer { private String firstName, lastName, Address; int Age; public Customer(String fname, String lname, int age, String address) { firstName = fname; lastName = lname; Age = age; Address = address; } public String printValues() {
This question already has an answer here: Saving Android Activity state using Save Instance State 25 answers 这是你如何恢复状态： private ImageView map; private ImageView dot; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.map_layout); map = (ImageView) findViewById(R.id.map); dot = (ImageView) findVie
这个问题在这里已经有了答案： 使用保存实例状态保存Android活动状态25个答案 这是你如何恢复状态： private ImageView map; private ImageView dot; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.map_layout); map = (ImageView) findViewById(R.id.map); dot = (ImageView) findViewById(R.id.dot); MotionReceiver
This question already has an answer here: Saving Android Activity state using Save Instance State 25 answers May be you can create a static object of HashMap and save favorite activities to this and can retrieve activities from that. Something like this. This HashMap Object can be kept in Application Class so you can access user list of fav activities anywhere from the App. private static
这个问题在这里已经有了答案： 使用保存实例状态保存Android活动状态25个答案 也许你可以创建一个HashMap的静态对象，并将最喜欢的活动保存到这个对象中，并可以从中检索活动。 像这样的东西。 这个HashMap对象可以保存在应用程序类中，这样你就可以从应用程序的任何地方访问收藏活动的用户列表。 private static final Map<String, Class> favActionMap; favActionMap= new HashMap<>(); favActi
This question already has an answer here: Saving Android Activity state using Save Instance State 25 answers Using shared preferences you can store the lanuage and get the stored value on screen orientation change. public String setLocale(String lang) { Locale myLocale = new Locale(lang); Resources res = getResources(); DisplayMetrics dm = res.getDisplayMetrics(); Configurati
这个问题在这里已经有了答案： 使用保存实例状态保存Android活动状态25个答案 使用共享首选项可以存储语言并在屏幕方向更改时获取存储值。 public String setLocale(String lang) { Locale myLocale = new Locale(lang); Resources res = getResources(); DisplayMetrics dm = res.getDisplayMetrics(); Configuration conf = res.getConfiguration(); conf.locale = myLocale; res.updateConfigura
This question already has an answer here: Saving Android Activity state using Save Instance State 25 answers You need to save the Bundle instance for the activity. Check this link for further insight. Saving bundle You must use a Bundle instance for the activity. You can take a look at this article on Google Developers Recreating an Activity
这个问题在这里已经有了答案： 使用保存实例状态保存Android活动状态25个答案 您需要保存该活动的Bundle实例。 查看此链接以获取更多信息。 保存包 您必须为活动使用Bundle实例。 您可以在Google Developers重新创建活动中查看这篇文章
This question already has an answer here: Saving Android Activity state using Save Instance State 25 answers For a simple piece of data such as high score you could easily save this in SharedPreferences. This is a simple key value pairing that persists across app launches and doesn't require a SQL database. To obtain a shared preference: SharedPreferences prefs = this.getSharedPrefere
这个问题在这里已经有了答案： 使用保存实例状态保存Android活动状态25个答案 对于诸如高分的简单数据，您可以轻松地将其保存在SharedPreferences中。 这是一个简单的键值配对，可以在应用程序启动时保持不变，并且不需要SQL数据库。 获取共享首选项： SharedPreferences prefs = this.getSharedPreferences( "com.example.app", Context.MODE_PRIVATE); 编辑并保存到共享首选项： int highScore = 100; prefs.edit().p
My application activity is facing a scenario when user press Home button on android phone. I have used OnPause() method . this i called when user press Home key. and Normal cicumstances when user launch the app again, it calls the onResume() method of the activity. But sometimes, when user re-launch the application, it opens the Launcher Activity(instead of calling the current activity.)
当用户按下android手机上的主页按钮时，我的应用程序活动正面临一种情况。 我已经使用OnPause（）方法。 这是我在用户按Home键时调用的。 和正常情况下，当用户再次启动应用程序时，它会调用活动的onResume（）方法。 但有时候，当用户重新启动应用程序时，它会打开Launcher Activity（而不是调用当前活动）。 所以我很困惑。 在我的手机中，它总是调用当前的活动。 但有时在另一部手机上，我发现它称为启动器活动，应
I am trying to figure out which threads should do what in Android. The only thing I have found stated in the official documentation is that camera.open() should be put into its own thread. What about: camera.startPreview() camera.stopPreview() camera.release() It doesn't state which thread they need. Must they be run on the main thread (ui thread)? Or am I free to choose? Why
我试图找出哪些线程应该在Android中做什么。 我发现在官方文档中camera.open()说明的是camera.open()应该放入它自己的线程中。 关于什么： camera.startPreview() camera.stopPreview() camera.release() 它没有说明他们需要哪个线程。 它们必须在主线程（ui线程）上运行吗？ 或者我可以自由选择？ 我为什么要弄清楚这一点？ 在主线程上运行时， camera.startPreview()会导致我的应用程序在短时间内抖动/滞后，