MainActivity.java

package com.fedorvlasov.lazylist;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;

public class MainActivity extends Activity {
    
    ListView list;
    LazyAdapter adapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        list=(ListView)findViewById(R.id.list);
        adapter=new LazyAdapter(this, mStrings);
        list.setAdapter(adapter);
        
        Button b=(Button)findViewById(R.id.button1);
        b.setOnClickListener(listener);
    }
    
    @Override
    public void onDestroy()
    {
        list.setAdapter(null);
        super.onDestroy();
    }
    
    public OnClickListener listener=new OnClickListener(){
        @Override
        public void onClick(View arg0) {
            adapter.imageLoader.clearCache();
            adapter.notifyDataSetChanged();
        }
    };
    
    private String[] mStrings={
            "https://pbs.twimg.com/profile_images/3092003750/9b72a46e957a52740c667f4c64fa5d10_normal.jpeg",
            "https://pbs.twimg.com/profile_images/2508170683/m8jf0po4imu8t5eemjdd_normal.png",
            "https://pbs.twimg.com/profile_images/1701796334/TA-New-Logo_normal.jpg",
            "https://pbs.twimg.com/profile_images/913338263/AndroidPolice_logo_normal.png",
            "https://pbs.twimg.com/profile_images/1417650153/android-hug_normal.png",
            "https://pbs.twimg.com/profile_images/1517737798/aam-twitter-right-final_normal.png",
            "https://pbs.twimg.com/profile_images/3319660679/70e7025a05b674852b9f3cea0998259c_normal.jpeg",
            "https://pbs.twimg.com/profile_images/2100693240/58534_150210305010136_148613708503129_315282_6481640_n_normal.jpg",
            "https://pbs.twimg.com/profile_images/1306095935/androidcoo_normal.png",
            "https://pbs.twimg.com/profile_images/2938108229/399ba333772228bfbb40134018fbe777_normal.jpeg",
            "https://pbs.twimg.com/profile_images/487047133392949248/sVTI9rGI_normal.png",
            "https://pbs.twimg.com/profile_images/3092003750/9b72a46e957a52740c667f4c64fa5d10_normal.jpeg",
            "https://pbs.twimg.com/profile_images/2508170683/m8jf0po4imu8t5eemjdd_normal.png",
            "https://pbs.twimg.com/profile_images/1701796334/TA-New-Logo_normal.jpg",
            "https://pbs.twimg.com/profile_images/913338263/AndroidPolice_logo_normal.png",
            "https://pbs.twimg.com/profile_images/1417650153/android-hug_normal.png",
            "https://pbs.twimg.com/profile_images/1517737798/aam-twitter-right-final_normal.png",
            "https://pbs.twimg.com/profile_images/3319660679/70e7025a05b674852b9f3cea0998259c_normal.jpeg",
            "https://pbs.twimg.com/profile_images/2100693240/58534_150210305010136_148613708503129_315282_6481640_n_normal.jpg",
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            "https://pbs.twimg.com/profile_images/2938108229/399ba333772228bfbb40134018fbe777_normal.jpeg",
            "https://pbs.twimg.com/profile_images/487047133392949248/sVTI9rGI_normal.png","https://pbs.twimg.com/profile_images/3092003750/9b72a46e957a52740c667f4c64fa5d10_normal.jpeg",
            "https://pbs.twimg.com/profile_images/2508170683/m8jf0po4imu8t5eemjdd_normal.png",
            "https://pbs.twimg.com/profile_images/1701796334/TA-New-Logo_normal.jpg",
            "https://pbs.twimg.com/profile_images/913338263/AndroidPolice_logo_normal.png",
            "https://pbs.twimg.com/profile_images/1417650153/android-hug_normal.png",
            "https://pbs.twimg.com/profile_images/1517737798/aam-twitter-right-final_normal.png",
            "https://pbs.twimg.com/profile_images/3319660679/70e7025a05b674852b9f3cea0998259c_normal.jpeg",
            "https://pbs.twimg.com/profile_images/2100693240/58534_150210305010136_148613708503129_315282_6481640_n_normal.jpg",
            "https://pbs.twimg.com/profile_images/1306095935/androidcoo_normal.png",
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            "https://pbs.twimg.com/profile_images/2508170683/m8jf0po4imu8t5eemjdd_normal.png",
            "https://pbs.twimg.com/profile_images/1701796334/TA-New-Logo_normal.jpg",
            "https://pbs.twimg.com/profile_images/913338263/AndroidPolice_logo_normal.png",
            "https://pbs.twimg.com/profile_images/1417650153/android-hug_normal.png",
            "https://pbs.twimg.com/profile_images/1517737798/aam-twitter-right-final_normal.png",
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            "https://pbs.twimg.com/profile_images/1701796334/TA-New-Logo_normal.jpg",
            "https://pbs.twimg.com/profile_images/913338263/AndroidPolice_logo_normal.png",
            "https://pbs.twimg.com/profile_images/1417650153/android-hug_normal.png",
            "https://pbs.twimg.com/profile_images/1517737798/aam-twitter-right-final_normal.png",
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    };
}