问题
I migrated a project to androidx. I changed the xml-files by hand an I also set the imports manually, where Android Studio wasn't successful. When I try to rebuild the project, the following error occurs in the compiled file DataBinderMapperImpl.java
The head of this file:
package com.xxxx.todo;
import android.util.SparseArray;
import android.util.SparseIntArray;
import android.view.View;
import androidx.databinding.DataBinderMapper;
import androidx.databinding.DataBindingComponent;
import androidx.databinding.ViewDataBinding;
import com.xxxx.todo.databinding.***ActivityDetailviewBindingImpl***; <--red
import java.lang.IllegalArgumentException;
import java.lang.Integer;
import java.lang.Object;
import java.lang.Override;
import java.lang.RuntimeException;
import java.lang.String;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class DataBinderMapperImpl extends DataBinderMapper {
private static final int LAYOUT_ACTIVITYDETAILVIEW = 1;
private static final SparseIntArray INTERNAL_LAYOUT_ID_LOOKUP = new SparseIntArray(1);
static {
INTERNAL_LAYOUT_ID_LOOKUP.put(com.xxxx.todo.R.layout.activity_detailview, LAYOUT_ACTIVITYDETAILVIEW);
}
@Override
public ViewDataBinding getDataBinder(DataBindingComponent component, View view, int layoutId) {
int localizedLayoutId = INTERNAL_LAYOUT_ID_LOOKUP.get(layoutId);
if(localizedLayoutId > 0) {
final Object tag = view.getTag();
if(tag == null) {
throw new RuntimeException("view must have a tag");
}
switch(localizedLayoutId) {
case LAYOUT_ACTIVITYDETAILVIEW: {
if ("layout/activity_detailview_0".equals(tag)) {
return new ***ActivityDetailviewBindingImpl***(component, view);
}
throw new IllegalArgumentException("The tag for activity_detailview is invalid. Received: " + tag);
}
}
}
return null;
}
C:\Users\xxxx\Desktop\ToDo_v2\ToDo_v2\app\build\generated\ap_generated_sources\debug\out\com\xxxx\todo\DataBinderMapperImpl.java:9: error: cannot find symbol
import com.xxxx.todo.databinding.ActivityDetailviewBindingImpl;
symbol: class ActivityDetailviewBindingImpl
location: package com.xxxx.todo.databinding
This is the corresponding xml-file:
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="todo"
type="com.xxxx.model.Todo"/>
<variable
name="actions"
type="com.xxxx.view.DetailviewActions"/>
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorDanger"
android:padding="10dp">
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/todoNameContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/todoNameLabel">
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"
android:maxLines="1"
android:text="@={todo.name}" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/todoDescriptionContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/todoDescriptionLabel"
app:layout_constraintTop_toBottomOf="@id/todoNameContainer">
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/todoDescription"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@={todo.description}" />
</com.google.android.material.textfield.TextInputLayout>
<LinearLayout
android:id="@+id/todoDateContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:orientation="vertical"
app:layout_constraintTop_toBottomOf="@id/todoDescriptionContainer">
<TextView
android:id="@+id/todoDateDescription"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Datum"
android:textSize="13dp" />
<TextView
android:id="@+id/todoDateText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="@{() -> actions.setDate()}"
android:text="@{todo.getDateString()}"
android:textSize="20dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:onClick="@{() -> actions.pickContact()}"
android:text="Kontakte"
android:textSize="13dp" />
</LinearLayout>
<ScrollView
android:id="@+id/scrollView"
style="@android:style/Widget.DeviceDefault.ScrollView"
android:layout_width="match_parent"
android:layout_height="150dp"
android:background="@color/colorDanger"
android:scrollbarStyle="insideOverlay"
app:layout_constraintTop_toBottomOf="@id/todoDateContainer"
tools:layout_editor_absoluteX="10dp">
<LinearLayout
android:id="@+id/contactsLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="@+id/doneContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="horizontal"
app:layout_constraintTop_toBottomOf="@id/scrollView">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:minWidth="300dp"
android:text="Erledigt"
android:textSize="20dp" />
<CheckBox
android:id="@+id/todoDoneCheckbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="@={todo.done}"
android:focusable="false"
android:gravity="center"
android:onCheckedChanged="@{() -> actions.toggleDone()}" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintTop_toBottomOf="@id/doneContainer">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:minWidth="300dp"
android:text="Favorit?"
android:textSize="20dp" />
<Switch
android:id="@+id/todoFavouriteSwitch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="@={todo.favourite}"
android:focusable="false"
android:gravity="center"
android:onCheckedChanged="@{() -> actions. toggleFavourite()}" />
</LinearLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/saveTodoButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="@{() -> actions.saveTodo()}"
android:src="@drawable/baseline_save_white_24"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintRight_toRightOf="parent" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/deleteButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:onClick="@{() -> actions.deleteTodo()}"
android:src="@drawable/ic_delete_forever_white_24dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
回答1:
Solution: I had accidentally changed
<android.support.design.widget.TextInputEditText
into
<com.google.android.material.textfield.TextInputLayout
while going through the xml-files by hand during migration to androidx. Should have been:
<com.google.android.material.textfield.TextInputEditText
Now it works.
来源：https://stackoverflow.com/questions/62433911/after-migration-to-androidx-databinding-problem-android-studio-4