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Android. Fragment getActivity() sometimes returns null
...et NullPointerException in fragment class when the getActivity() method is called.
8 Answers
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How should I use try-with-resources with JDBC?
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How do you call Connection::setAutoCommit? Such a call is not allowed within the try between the con = and ps =. When getting a Connection from a DataSource that may be backed with a connection pool, we cannot assume how autoCommit is ...
菜单的背景颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...gs, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CMenu *Menu=GetMenu();
ClientToScreen(&point);//将窗口坐标转换成屏幕坐标
Menu->GetSubMenu(0)->TrackPopupMenu(
TPM_LEFTBUTTON|TPM_VERTICAL,point.x,point.y,this);
Menu->Detach();
CDial...
Is it possible to use raw SQL within a Spring Repository
...import javax.persistence.EntityManager;
Now your main class, you have to call this function. First get EntityManager and call this getUserByRoll(EntityManager entityManager,String rollNo) function. Calling procedure is given bellow:
Here is the Imports
import javax.persistence.EntityManager;
im...
Draw in Canvas by finger, Android
...our onDraw() you draw the paths using the paint of your choice. You should call invalidate() to refresh the view.
To choose options you can click menu and choose the options.
The below can be used as a reference. You can modify the below according to your needs.
public class FingerPaintActivity e...
Difference between “@id/” and “@+id/” in Android
...id:id, then you're specifying a new id, and are instructing the parser (or call it the builder) to create a new entry in R.java, thus you have to include a + sign.
While in the other case, like android:layout_below="@id/myTextView" , you're referring to an id that has already been created, so parse...
android edittext onchange listener
... public void afterTextChanged(Editable s) {
// you can call or do what you want with your EditText here
// yourEditText...
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
public void onTex...
How do I mock a service that returns promise in AngularJS Jasmine unit test?
I have myService that uses myOtherService , which makes a remote call, returning promise:
8 Answers
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Overriding id on create in ActiveRecord
... and creating a table, and incurring the overhead of the database on every call, you just store your data in yml files. The foreign keys in the database reference the in-memory ids in the yml.
ActiveHash is great for picklists and small tables that change infrequently and only change by developers...
How to force an entire layout View refresh?
... Invalidate the whole view. If the view is visible, onDraw(Canvas) will be called at some point in the future. This must be called from a UI thread. To call from a non-UI thread, call postInvalidate().
ViewGroup vg = findViewById (R.id.mainLayout);
vg.invalidate();
Now, when the Activity resum...