I would like to change the name of the graphics, but android studio shows an error:
"Cannot perform the refactoring. This element cannot be renamed"
On the left is a tutorial on where it works, and on the right my code
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/name_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/name"
android:textAlignment="center"
style="#style/NameStyle" />
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:srcCompat="#android:drawable/btn_star_big_on"
/>
</LinearLayout>
Refactor works only in the id window:
Why doesn't it work in XML code?
This is the first project on Kubuntu 20.04 LTS.
You are trying to rename a built in drawable of the android platform while the tutorial screenshot you posted is trying to rename the id of the view
What I mean is
The resources having the #android: as prefix are the ones that are built in the android platform and thus can't be refactored or renamed and your screenshot is trying to rename like so. You can see the dialog title Rename xyz and its occurence to which indicates what element you are trying to rename
<ImageView
android:id="#+id/imageView" // This is being changed in the screenshot
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:srcCompat="#android:drawable/btn_star_big_on" // You are trying to change this
Related
when first defining id ( #+id ) in constraint part ( such as app:layout_constraintBottom_toTopOf ) i get the error "cannot resolve symbol"
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="#+id/tv2" />
<TextView
android:id="#id/tv2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.constraint.ConstraintLayout>
see the screen shot:
In gradle I have constraint layout 1.1.3 and Android studio version is 3.2.1 I recently updated it from older version:
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
app runs correctly without any error but the error is shown in android studio layout window.
Invalidating caches, rebuilding, and changing constraint layout version NONE of them helps!
In Java class R.id.tv2 works correctly and when i control+click it I can see its field in R class. editor is using another class for ids that is not same as the R class in java code?
This question was about a bug in old Android Studio and ConstraintLayout versions in current versions of Android Studio using androidx library this bug is not presented.
The plus sign + is added when defining the id (#+id/tv2) but when referencing you don't need to add the plus sign like this #id/tv2.
Instead of this
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="#+id/tv2" />
<TextView
android:id="#id/tv2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.constraint.ConstraintLayout>
use this:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="#id/tv2" />
<TextView
android:id="#+id/tv2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.constraint.ConstraintLayout>
To get it right I suggest you convert your code to Androidx.
The below code is written in Androidx
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="#id/tv2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/tv2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
Screenshot
As already mentioned in the other answers, use #+id/<your_name> to declare new resources.
In my case, Android Studio complained when using the - character in names (even though the app compiled and worked either way).
This question was about a bug in old Android Studio and ConstraintLayout versions in current versions of Android Studio using androidx library this bug is not presented.
I just started using android studio and I inserted a button and text field. In preview panel looks ok but when I run the app the layout it's different.
This is the xml code:
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="16dp"
android:paddingTop="16dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
tools:context="com.example.alexander.myapplication.MainActivity">
<TextView
android:id="#+id/message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
tools:ignore="HardcodedText" />
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
tools:layout_editor_absoluteX="119dp"
tools:layout_editor_absoluteY="222dp"
tools:ignore="HardcodedText,MissingConstraints"
android:onClick="buttonClicked"
/>
This is how it looks like
Thank you!
Look at the lines:
tools:layout_editor_absoluteX="119dp"
tools:layout_editor_absoluteY="222dp"
What they say is that you placed the button in an absolute position BUT only in the editor preview.
The button doesn't have real placement values when the app actually running (notice the "editor" prefix in the parameters name).
You need to define actual values in the editor.
Check out this guide on the Android developers site:
Build a Responsive UI with ConstraintLayout
I just solved the problem by setting the layout to RelativeLayout.
When I run my android application in Android version >=4 I got this out put(I didn't tested in android version 3):
When run the same application in android version 2.3 I got a bit different output:
You can see in second screenshot the image for about button is not visible. But when I try run the same application several times on 2.3 some times I got about image visible.Here is my code :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<include layout="#layout/actionbar_with_right_button" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:scrollbars="none" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:drawablePadding="#dimen/settings_text_view_drawable_padding"
android:drawableTop="#drawable/snooze_button"
android:gravity="center"
android:onClick="showRemainderSnoozeSettings"
android:padding="#dimen/settings_text_view_padding"
android:text="#string/snooze" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:drawablePadding="#dimen/settings_text_view_drawable_padding"
android:drawableTop="#drawable/help_button"
android:gravity="center"
android:onClick="showFaq"
android:padding="#dimen/settings_text_view_padding"
android:text="#string/help" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:drawablePadding="#dimen/settings_text_view_drawable_padding"
android:drawableTop="#drawable/about_button"
android:gravity="center"
android:onClick="showAbout"
android:padding="#dimen/settings_text_view_padding"
android:text="#string/about" />
</LinearLayout>
</ScrollView>
I didn't understand why this is happening.
Can anyone help me to solve this issue.
Edit :
One more important thing I forgot to mention when I changed android:drawableTop="#drawable/about_button" to android:drawableTop="#drawable/help_button" of about TextView. It worked perfectly. So it can be an issue of my about_button image. So I recreated the about image again and put in all drawable folder. Even after that also I didn't get any +ve result. This issue only in 2.3 or less.
Thanks
May this help you:
Seems like this is a bug with android, where sometimes the first image in the drawable folder doesn't get displayed.....
I had a similar bug - a particular drawable was not being displayed, no matter in what ImageView. So I Added a dummy image called aaaa.png to the drawable folder and problem was solved....
I installed Android SDK 21 bundle Windows x64 and get nothing but errors if I try to add any code to the initial project creation code. I tried running through the Hello World and every entry gave an error. BTW: I am a newbie with Android and Linux, but I have done a lot of Windows programming. thanks...
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<EditText android:id="#+id/edit_message"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/edit_message" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send" />
</LinearLayout>
EDIT: removed redundancy.
Your last Button(button_send) didn't have any parent view.
You should to put that into a view like LinearLayout or others.
Try:
1) reloading Eclipse
2) running the Project Clean.
I'm trying to display the device's position on a map. i got my app working but the map wouldn't display. I've done lots of reading on the common errors for this eg map api key. my phone is a samsung galaxy 2.1. i noticed that i was building against google api8. so i mess up a bit on a few things and had to delete the project and copy and paste the src files back into a new project. the new project is built against google api7 now.
the problem is that the main.xml file has an error in it. The only thing i can think of is that i've changed what the project is built against api7 instead of api8. any ideas?
error: Error: String types not allowed (at 'layout_width' with value 'match_parent').
[edit] the error is in the relativelayout tag
.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content" android:gravity="fill">
<com.google.android.maps.MapView
android:id="#+id/myGMap"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:enabled="true"
android:clickable="true"
android:apiKey="02wE28syQIHzpwXXa95CrtA1XJLU5segJgltvKQ"
/>
<EditText android:id="#+id/edittext1"
android:inputType="text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="CLOSE"
android:layout_alignParentRight="true"
android:id="#+id/close" ></Button>
</RelativeLayout>
Yes, in api level 7 there is no xml attibute match_parent exist, instead you need to use fill_parent.