ActionBarControlListViewActivity.java

/*
 * Copyright 2014 Soichiro Kashima
 *
 * 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 com.marshalchen.common.demoofui.observablescrollview;

import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.widget.AbsListView;
import android.widget.ArrayAdapter;

import com.github.ksoichiro.android.observablescrollview.ObservableListView;
import com.github.ksoichiro.android.observablescrollview.ObservableScrollViewCallbacks;
import com.github.ksoichiro.android.observablescrollview.ScrollState;
import com.marshalchen.common.demoofui.R;

import java.util.ArrayList;
import java.util.List;

public class ActionBarControlListViewActivity extends ActionBarActivity implements ObservableScrollViewCallbacks {

    private static final String TAG = ActionBarControlListViewActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.observable_scroll_view_activity_actionbarcontrollistview);

        ObservableListView listView = (ObservableListView) findViewById(R.id.list);
        listView.setScrollViewCallbacks(this);
        List<String> items = new ArrayList<String>();
        for (int i = 1; i <= 100; i++) {
            items.add("Item " + i);
        }
        listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items));

        // ObservableListView uses setOnScrollListener, but it still works.
        listView.setOnScrollListener(new AbsListView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
                Log.v(TAG, "onScrollStateChanged: " + scrollState);
            }

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
                Log.v(TAG, "onScroll: firstVisibleItem: " + firstVisibleItem + " visibleItemCount: " + visibleItemCount + " totalItemCount: " + totalItemCount);
            }
        });
    }

    @Override
    public void onScrollChanged(int scrollY, boolean firstScroll, boolean dragging) {
    }

    @Override
    public void onDownMotionEvent() {
    }

    @Override
    public void onUpOrCancelMotionEvent(ScrollState scrollState) {
        ActionBar ab = getSupportActionBar();
        if (scrollState == ScrollState.UP) {
            if (ab.isShowing()) {
                ab.hide();
            }
        } else if (scrollState == ScrollState.DOWN) {
            if (!ab.isShowing()) {
                ab.show();
            }
        }
    }
}