public class

AdapterViewBindingAdapter

extends java.lang.Object

 java.lang.Object

↳androidx.databinding.adapters.AdapterViewBindingAdapter

Gradle dependencies

compile group: 'androidx.databinding', name: 'databinding-adapters', version: '7.4.0-alpha02'

  • groupId: androidx.databinding
  • artifactId: databinding-adapters
  • version: 7.4.0-alpha02

Artifact androidx.databinding:databinding-adapters:7.4.0-alpha02 it located at Google repository (https://maven.google.com/)

Androidx class mapping:

androidx.databinding.adapters.AdapterViewBindingAdapter android.databinding.adapters.AdapterViewBindingAdapter

Summary

Constructors
publicAdapterViewBindingAdapter()

Methods
public static voidsetOnItemSelectedListener(AdapterView view, AdapterViewBindingAdapter.OnItemSelected selected, AdapterViewBindingAdapter.OnNothingSelected nothingSelected, InverseBindingListener attrChanged)

public static voidsetSelectedItemPosition(AdapterView view, int position)

public static voidsetSelectedItemPosition(AdapterView view, int position, Adapter adapter)

public static voidsetSelection(AdapterView view, int position)

public static voidsetSelection(AdapterView view, int position, Adapter adapter)

from java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructors

public AdapterViewBindingAdapter()

Methods

public static void setSelectedItemPosition(AdapterView view, int position)

public static void setSelection(AdapterView view, int position)

public static void setSelectedItemPosition(AdapterView view, int position, Adapter adapter)

public static void setSelection(AdapterView view, int position, Adapter adapter)

public static void setOnItemSelectedListener(AdapterView view, AdapterViewBindingAdapter.OnItemSelected selected, AdapterViewBindingAdapter.OnNothingSelected nothingSelected, InverseBindingListener attrChanged)

Source

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package androidx.databinding.adapters;

import androidx.databinding.BindingAdapter;
import androidx.databinding.BindingMethod;
import androidx.databinding.BindingMethods;
import androidx.databinding.InverseBindingListener;
import androidx.databinding.InverseBindingMethod;
import androidx.databinding.InverseBindingMethods;
import androidx.annotation.RestrictTo;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;

/**
 * @hide
 */
@RestrictTo(RestrictTo.Scope.LIBRARY)
@SuppressWarnings({"WeakerAccess", "unused", "unchecked", "rawtypes"})
@BindingMethods({
        @BindingMethod(type = AdapterView.class, attribute = "android:onItemClick", method = "setOnItemClickListener"),
        @BindingMethod(type = AdapterView.class, attribute = "android:onItemLongClick", method = "setOnItemLongClickListener"),
})
@InverseBindingMethods({
        @InverseBindingMethod(type = AdapterView.class, attribute = "android:selectedItemPosition"),
        @InverseBindingMethod(type = AdapterView.class, attribute = "android:selection",
                method = "getSelectedItemPosition",
                event = "android:selectedItemPositionAttrChanged"),
})
public class AdapterViewBindingAdapter {

    @BindingAdapter("android:selectedItemPosition")
    public static void setSelectedItemPosition(AdapterView view, int position) {
        if (view.getSelectedItemPosition() != position) {
            view.setSelection(position);
        }
    }

    @BindingAdapter("android:selection")
    public static void setSelection(AdapterView view, int position) {
        setSelectedItemPosition(view, position);
    }

    @BindingAdapter({"android:selectedItemPosition", "android:adapter"})
    public static void setSelectedItemPosition(AdapterView view, int position, Adapter adapter) {
        if (adapter != view.getAdapter()) {
            //noinspection unchecked
            view.setAdapter(adapter);
            view.setSelection(position);
        } else if (view.getSelectedItemPosition() != position) {
            view.setSelection(position);
        }
    }

    @BindingAdapter({"android:selection", "android:adapter"})
    public static void setSelection(AdapterView view, int position, Adapter adapter) {
        setSelectedItemPosition(view, position, adapter);
    }

    @BindingAdapter(value = {"android:onItemSelected", "android:onNothingSelected",
            "android:selectedItemPositionAttrChanged" }, requireAll = false)
    public static void setOnItemSelectedListener(AdapterView view, final OnItemSelected selected,
            final OnNothingSelected nothingSelected, final InverseBindingListener attrChanged) {
        if (selected == null && nothingSelected == null && attrChanged == null) {
            view.setOnItemSelectedListener(null);
        } else {
            view.setOnItemSelectedListener(
                    new OnItemSelectedComponentListener(selected, nothingSelected, attrChanged));
        }
    }

    public static class OnItemSelectedComponentListener implements OnItemSelectedListener {
        private final OnItemSelected mSelected;
        private final OnNothingSelected mNothingSelected;
        private final InverseBindingListener mAttrChanged;

        public OnItemSelectedComponentListener(OnItemSelected selected,
                OnNothingSelected nothingSelected, InverseBindingListener attrChanged) {
            this.mSelected = selected;
            this.mNothingSelected = nothingSelected;
            this.mAttrChanged = attrChanged;
        }

        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            if (mSelected != null) {
                mSelected.onItemSelected(parent, view, position, id);
            }
            if (mAttrChanged != null) {
                mAttrChanged.onChange();
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {
            if (mNothingSelected != null) {
                mNothingSelected.onNothingSelected(parent);
            }
            if (mAttrChanged != null) {
                mAttrChanged.onChange();
            }
        }
    }

    public interface OnItemSelected {
        void onItemSelected(AdapterView<?> parent, View view, int position, long id);
    }

    public interface OnNothingSelected {
        void onNothingSelected(AdapterView<?> parent);
    }
}