I'm trying to use android MotionLayout, but it can't find appropriate classes for it and wont work.
I tried implementing the below dependencies:
implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta2'
implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta1'
implementation 'com.android.support.constraint:constraint-layout:2.0.0-beta1'
implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha2'
implementation 'com.android.support.constraint:constraint-layout:2.0.0-alpha4'
but none of them seems to work...
here is my XML file:
<android.support.constraint.motion.MotionLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
footstools="http://schemas.android.com/tools"
android:id="#+id/motionLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:showPaths="true"
tools:context=".PlayGameActivity">
<View
android:id="#+id/button"
android:layout_width="64dp"
android:layout_height="64dp"
android:background="#color/colorAccent"
android:text="Button" />
</android.support.constraint.motion.MotionLayout >'
but it gives me always this error massage:
Missing classes
The following classes could not be found:
- android.support.constraint.motion.MotionLayout (Fix Build Path, Edit XML, Create Class)
Tip: Try to build the project.
Tip: Try to refresh the layout.
and in the preview window of the projects it fills the entire layout in gray and writes in the center:
android...MotionLayout
There is no android.support.constraint.motion.MotionLayout
in implementation "androidx.constraintlayout:constraintlayout:2.0.0-beta2".
It's called androidx.constraintlayout.motion.widget.MotionLayout.
If MotionLayout shows up gray, you might be lacking the app:layoutDescription XML.
There's an example for AndroidX & Support Library versions.
Related
I have seen EditText that has a hint and when user taps on it the hint moves up reducing the font size and making the field editable by the user. When the user moves to another EditText leaving it blank the hint appears back in full size.
What is it and how can I add it in my activity on Android Studio using XML?
I am on Android Studio using Kotlin.
if you mean this
it is TextInputLayout
Add the dependency for the design support library inside the build.gradle (Module: app) file as shown below.
implementation 'com.google.android.material:material:<version>'
the latest version at this time is 1.2.0-alpha03 you can see latest version from mvnrepository
Then, you can use it like this in your xml layouts.
<com.google.android.material.textfield.TextInputLayout
android:id="#+id/myTextInputLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/my_editText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="#string/YOUR_HINT"
android:singleLine="true"
android:textColor="#color/colorDarkestGray" />
</com.google.android.material.textfield.TextInputLayout>
This is TextInputLayout and you can use editText as child in it like this :
At first add the dependency for the design support library inside the build.gradle file as shown below.
implementation 'com.android.support:design:25.3.1'
And if you are using AndroidX use this :
implementation 'com.google.android.material:material:1.0.0'
Second ,Then implement that like this :
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="#dimen/activity_horizontal_margin">
<android.support.design.widget.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Floating Hint Enabled Default" />
</android.support.design.widget.TextInputLayout>
Android TextInputLayout Features
1-Enabling/Disabling floating hints
2-Enabling/Disabling floating hint animation
3-Displaying Error Messages
4-Showing Character Counter
5-Password Visibility Toggle and . . .
<view
android:layout_marginTop="530dp"
android:layout_width="match_parent"
android:layout_height="2dp"/>
If I use this code in android studio. I got some Rendering problems
Error:
Unable to inflate view tag without class attribute.
I think you have given "view" instead of "View"
Please use this one
<View
android:layout_marginTop="530dp"
android:layout_width="match_parent"
android:layout_height="2dp"/>
Hopefully this will help you
I have a listActivity that displays via an adapter an xml feed fetched from the web, adn the layout file activity_list_feed.xml :
`<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:drawSelectorOnTop="false"
android:transcriptMode="normal"
/>`
In the graphic editor i cannot drag a button into this layout, and when i try to hardcode as per this file :
`<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<Button
android:id="#+id/addBtn"
android:text="Add New Item"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="addItems"/>
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:drawSelectorOnTop="false"
android:transcriptMode="normal"
/>
</LinearLayout>`
i get a compile error message :
java.lang.ClassCastException: android.widget.LinearLayout cannot be cast to android.widget.TextView
How can i add a button on top of the list because i want to refresh the pull.thank you.
The code that you provided actually works in its current state in Android Studio:
Make sure that in your java code, you are referencing the correct item. Make sure that you're setting the overall layout to be that layout, and THEN doing findViewById(R.layout.addBtn).
Also, try changing the Android Version in your IDE to 22 (as I have it set in the top right corner of the picture). That may solve your error.
I managed to add the button in the editor and this without setting to API 22 as per your picture. However the program didn't compile still.
The message error "ArrayAdapter requires the resource ID to be a TextView" meant i didn't provide the right argument to the adapter.
According to this answer :
"ArrayAdapter requires the resource ID to be a TextView" xml problems
it appears that the choice of the constructor is important, since i wanted to add a button in the view, i must use the constructor with 4 arguments (the additional argument being the id of the view):
http://developer.android.com/reference/android/widget/ArrayAdapter.html#ArrayAdapter(android.content.Context,int,int,java.util.List)
Using this constructor solved the problem.
In an xml layout file, the xmlns is already defined, but I get this error at compile time: No resource identifier found for attribute. Why is that? thanks
I'm following a Facebook dev tutorial on facebook site https://developers.facebook.com/docs/getting-started/facebook-sdk-for-android/3.0/ the layout file is as follows:
<ScrollView 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"
>
<com.facebook.widget.ProfilePictureView
android:id="#+id/profilepic"
android:layout_height="wrap_content"
android:layout_width="0dp"
android:layout_weight="1"
app:preset_size="large" app:is_cropped="true"
/>
</ScrollView>
I figured it out, have to replace /res-auto with res/com.facebook.samples.profilepicture
Your layout file looks correct. check that in your 'project.properties' file, the 'android.library.reference.1' value points to the correct location.
The res-auto is feature properly supported in API level 17. It must be applied for all layouts using custom attributes. It is automatically replaced on build time, by eclipse.
Ref Updated SDK Tools and ADT revision 17
I would like to be able to define a ShapeDrawable in my layout file and then inflate that so I can draw on it.
I have followed the tutorial on the android developers' site but I cannot see how I reference my ShapeDrawable in my main class file.
How do I actually inflate it?
I have put the following the following into my layout file:
<com.example.shapedrawable.CustomDrawableView
android:id="#+id/customDrawableView"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
Once you have defined the ShapeDrawable in its own XML file, you need to add the following to the layout.xml where you want it to be included:
<ImageView
android:src="#drawable/shapeDrawable_filename"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
If you want to do it programmatically, I don't have an answer (yet), but from your question, it seems this should work!
Let me know if that helps ;)