ua.yyunikov.android.view.AdditionRemovalListView.java Source code

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Here is the source code for ua.yyunikov.android.view.AdditionRemovalListView.java

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/*
 * Copyright 2015 Yuriy Yunikov
 *
 * 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 ua.yyunikov.android.view;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ListAdapter;
import android.widget.ListView;
import ua.yyunikov.android.adapters.AdditionRemovalAdapter;

/**
 * ListView (currently works only with {@link String} objects) with add and remove buttons and appropriate insert/delete animations.
 * For this {@link android.widget.ListView} to work correctly, please specify {@link ua.yyunikov.android.adapters.AdditionRemovalAdapter} as adapter.
 */
public class AdditionRemovalListView extends ListView {

    private static final int ANIMATION_TIME = 300;

    public AdditionRemovalListView(final Context context) {
        this(context, null);
    }

    public AdditionRemovalListView(final Context context, final AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    // TODO implement add

    public void add(final AdditionRemovalAdapter.Item item) {
        final AdditionRemovalAdapter adapter = (AdditionRemovalAdapter) getAdapter();

        adapter.addToPosition(item, 1); // adding to first position so 0 item will be for adding new items
        adapter.notifyDataSetChanged();
    }

    public void remove(final AdditionRemovalAdapter.Item item) {
        final AdditionRemovalAdapter adapter = (AdditionRemovalAdapter) getAdapter();

        adapter.remove(item);
        adapter.notifyDataSetChanged();
    }

    public void removeWithAnimation(final AdditionRemovalAdapter.Item item, final View itemView) {
        final ObjectAnimator anim = ObjectAnimator.ofFloat(itemView, View.ALPHA, 0);

        anim.setDuration(ANIMATION_TIME);
        ViewCompat.setHasTransientState(itemView, true);

        anim.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                remove(item);
                itemView.setAlpha(1);
                ViewCompat.setHasTransientState(itemView, false);
            }
        });
        anim.start();
    }

    private void init(final Context context, final AttributeSet attrs) {
        initAttrs(context, attrs);
    }

    private void initAttrs(final Context context, final AttributeSet attrs) {
        final TypedArray attrsArray = context.obtainStyledAttributes(attrs, R.styleable.AdditionRemovalListView);

        attrsArray.recycle();
    }

    @Override
    public void setAdapter(final ListAdapter adapter) {
        if (!(adapter instanceof AdditionRemovalAdapter)) {
            throw new IllegalArgumentException(
                    "Adapter should be instance of " + AdditionRemovalAdapter.class.getSimpleName());
        }

        super.setAdapter(adapter);
    }
}