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Android example source code file (ListScrollListener.java)

This example Android source code file (ListScrollListener.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, app, arrayadapter, handler, listactivity, listscrolllistener, nothing, os, override, position, showing, string, textview, ui, view, widget

The ListScrollListener.java Android example source code

/*
 * Copyright (C) 2007 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 android.widget.listview;

import android.app.ListActivity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import com.android.frameworks.coretests.R;

/**
 * Exercises change notification in a list
 */
public class ListScrollListener extends ListActivity implements AbsListView.OnScrollListener {
    Handler mHandler = new Handler();
    TextView mText;

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        setContentView(R.layout.list_scroll_listener);

        String values[] = new String[1000];
        int i=0;
        for(i=0; i<1000; i++) {
            values[i] = ((Integer)i).toString();
        }
        
        mText = (TextView) findViewById(R.id.text);
        setListAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, values));


        getListView().setOnScrollListener(this);
    }

    public void onItemSelected(AdapterView parent, View v, int position, long id) {
        mText.setText("Position " + position);
    }

    public void onNothingSelected(AdapterView parent) {
        mText.setText("Nothing");
    }

    public void onScroll(AbsListView view, int firstCell, int cellCount, int itemCount) {
        int last = firstCell + cellCount - 1;
        mText.setText("Showing " + firstCell + "-" + last + "/" + itemCount);
    }

    public void onScrollStateChanged(AbsListView view, int scrollState) {        
    }
}

Other Android examples (source code examples)

Here is a short list of links related to this Android ListScrollListener.java source code file:

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