i have a pojo class
run this code
Field[] fields = clazz.getDeclaredFields();
i got a field under Android Studio IDE :
its type is interface com.android.tools.fd.runtime.IncrementalChange
its name is $change
My Android Studio version is 2.0 Preview 4
the pojo class which i definded by myself didn't have $change field
when i run the code in eclipse, it works normal.
where did the field come from?
how can i avoid this field , is there some setting in Android Studio ?
Instead of turning off instant run we can resolve this issue by utilising synthetic modifier check. 'com.android.tools.fd.runtime.IncrementalChange' is synthetic so we can check whether the field is synthetic using isSynthetc method.
Field[] fields = objClass.getFields();
for (Field field : fields) {
String name = field.getName();
Object value;
if(field.isSynthetic()){
continue;
}
//add your code here
}
Most likely this field is added in order to support the Instant Run feature added in Android Studio 2.0, and will not appear if you turn off Instant Run.
I think diordna answer is best link。install run is Android Studio new function，I won't close it。
I use JsonTool link in my sdk library ,when I run my app with androidStudio2.2 JsonTooll.objectToJson() give me a bad json String ,I add code
if (name.contains("this$") || field.isSynthetic()) continue;
solve it
Related
When I auto generate dart constructors, I would like the generator to make my constructors using named parameters and add key.
(Curly braces wrapping the constructor arguments)
Is there some easy trick I can perform to make Android Studio do this for me?
// Auto generated constructor without named parameters.
// This is how Android studio currently generates my Widget constructors.
class MyTestModel {
MyTestModel(this.a, this.b, this.c);
final String a;
final String b;
final String c;
}
// Constructor with named parameters and key.
// This is how I would like Android Studio Auto Generate to behave.
class MyTestModelB {
MyTestModelB({Key key, this.a, this.b, this.c}) : super(key: key);
final String a;
final String b;
final String c;
}
So another way to phrase my question:
When I press "Command + N" and I use Android Studio to automatically generate my Dart constructor.
Currently Android Studio does not generate Named Parameter Constructors for me, neither does it add a key to the constructors.
Somewhere I guess there is a Template of some kind that Android Studio uses to autogenerate those constructors.
I guess I need to access that Template and modify it to have it autogenerate Named Parameter Constructors for me, and add key.
But where is it?
My installation of Flutter/Dart/Android studio is rather new.
From April/May 2020.
The default constructor generator from Cmd+N (MacOS) will not generate named parameters constructor. You need to highlight one of your final variable (must be final), wait for the popup (see video clip) and select generate constructor from final field or press alt+shift+enter.
If you are looking for the 'named argument constructor' option in the generate menu, then you should install Dart Data Class Plugin.
Ok, I don't know what has happened to my Android Studio, but now I can generate the constructors like a want them. Something must have happened! Maybe something got installed or updated? I don't know. If you know where exactly the settings for auto generate of Flutter constructors happens in Android Studio, I am interested to know. This is how my constructors look now:
class Avatar extends StatelessWidget {
final String photoUrl;
final VoidCallback onPressed;
const Avatar({Key key, this.photoUrl, this.onPressed}) : super(key: key);
}
it's working fine on Android
submitEmail(email) {
this.emailInPutField.click();
this.emailInPutField.setValue(email);
driver.hideKeyboard();
this.confirmButton.click();
}
But when I want to use the same for iOS its cant give option for driver.
You can try this:
IOSDriver< WebElement> AD= (IOSDriver) driver;
AD.getKeyboard().sendKeys(Keys.RETURN);
Note: it will not work if you are inside multi-line input field
In my Android project I have an external library with following method:
// Some external library
class Foo {
#CheckReturnValue
public final Bar returnBar(Bar bar) {
...
}
}
I have to call this method a lot in my project, but I do not need the returned value of this method. All I need is the side effect of the method. So this is how I use it:
fooInstance.returnBar(barInstance) // ignore returned value
The problem with the above code is that Android Studio editor will show CheckResult warning lint. What I can do is to either just live with that warning lint or disable CheckResult for the entire project or module, but I was wondering if there is a better approach to this warning.
What I cannot do is to put SuppressLint because I will be using that method 100 < times in my project and adding SuppressLint to every single usage is not really feasible.
I already went through Android Studio inspection settings but unfortunately was not able to find anything that can help. I would be grateful if you could provide literally any thought on this problem.
The problem:
#Nullable
private View view;
public doSomethingWithView() {
checkNotNull(view); //<- this throws NPE if parameter is null
view.showWarningAboutIssue(); //<- IDE reports about possible null here
}
Is there a way to configure the IDE, so that it doesn't report for a possible NPE on the second line?
UPDATE:
I'm using Dagger checkNotNull method which is identical to Guava ones. If I change import from Dagger to Guava my IDE removes the warning.
UPDATE #2
With latest update of Android studio I can not reproduce it anymore
You need to add the following comment before view.showWarningAboutIssue() statement:
//noinspection ConstantConditions
This can also be performed by the GUI : Alt+Enter (or "bubblelight" menu), then choose Assert view!=null and then Suppress for statement:
Ok, I have some fictional class
public class TEMP {
String data;
View.OnClickListener onClickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
if (data != null) {
}
}
};
}
And it looks like this in Android Studio:
If I collapse all - it looks ugly:
If I remove that if block inside onClick() - it looks good:
Why is this happening and how can I solve this issue?
It's been a while, so I'm not sure how helpful this is.
This is folding the function into a lambda-like visual structure with Java 8 lambda-notation. Single method interfaces are (almost) equivalent to lambdas in Java 8. Android Studio currently does NOT support Java 8 lambda notation (details found at the bottom of this answer: Is it possible to use Java 8 for Android development?).
A workaround IS available for Java 8, based on the Jack toolchain. Here is the the workaround, and here is the deprecation of the Jack toolchain.
Another note is that according to here and here, Android Studio 2.4 preview 4 and later appears to support actual lambda notation. Note that these are previews, and the latest official version is 2.3.2.
As for how to fix it, I don't believe it is possible. You may be able to use the region feature to duplicate what you are trying to achieve. The link above is a how-to sort of thing.