CustomAdapter

AndroidMinfest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="tw.com.arnold_lin.customlistview" >

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

CustomAdapter.java

package tw.com.arnold_lin.customlistview;

import android.annotation.TargetApi;
import android.content.Context;
import android.os.AsyncTask;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

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

/**
 * Created by arnold_lin on 15/7/25.
 */
public class CustomAdapter extends BaseAdapter {

    public static class CustomView extends LinearLayout {
        private String originalText = "";
        private String changedText = "";

        private int originalColor = 0;
        private int changedColor = 0;

        private ImageView imageView ;
        private FrameLayout bottomBar ;
        private TextView title ;

        public CustomView(Context context) {
            super(context);
            initialize(context);
        }

        public CustomView(Context context, AttributeSet attrs) {
            super(context, attrs);
            initialize(context);
        }

        @TargetApi(21)
        public CustomView(Context context, AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
            initialize(context);
        }

        @TargetApi(21)
        public CustomView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
            super(context, attrs, defStyleAttr, defStyleRes);
            initialize(context);
        }

        private void initialize(Context context){
            DisplayMetrics metrics = getResources().getDisplayMetrics();
            setOrientation(VERTICAL);

            imageView = new ImageView(context);
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, metrics.widthPixels));
            addView(imageView);

            bottomBar = new FrameLayout(context);
            bottomBar.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            addView(bottomBar);

            title = new TextView(context);
            title.setGravity(Gravity.CENTER);
            title.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, Gravity.CENTER));
            bottomBar.addView(title);
        }

        public void setOriginalText(String text){
            originalText = text;
        }

        public void setOriginalColor(int originalColor) {
            this.originalColor = originalColor;
        }

        public void setChangedText(String changedText) {
            this.changedText = changedText;
        }

        public void setChangedColor(int changedColor) {
            this.changedColor = changedColor;
        }

        public FrameLayout getBottomBar() {
            return bottomBar;
        }

        public ImageView getImageView() {
            return imageView;
        }

        public TextView getTitle() {
            return title;
        }


        public int getChangedColor() {
            return changedColor;
        }

        public String getChangedText() {
            return changedText;
        }

        public int getOriginalColor() {
            return originalColor;
        }

        public String getOriginalText() {
            return originalText;
        }
    }

    public static interface CustomDataBinder{
        public void loadImage(ImageView imageView);

        public String getOriginalText();
        public String getChangedText();

        public int getOriginalColor();
        public int getChangedColor();

    }

    public class ViewHolder {
        CustomView view;
    }

    private final List<CustomDataBinder> binders = new ArrayList<>();
    private final Context context;
    private AsyncTask<Void, Void, Void> asyncTask = null;
    private final List<CustomAdapter.CustomView> customViews = new ArrayList<>();


    public CustomAdapter(Context context) {
        this.context = context;
    }

    @Override
    public int getCount() {
        return binders.size();
    }

    @Override
    public Object getItem(int i) {
        return binders.get(i);
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder viewHolder  = null;
        if(view == null){
            CustomView customView = new CustomView(context);
            view = customView;
            viewHolder = new ViewHolder();
            viewHolder.view = customView;
            view.setTag(viewHolder);
        }else {
            viewHolder = (ViewHolder) view.getTag();
        }

        CustomDataBinder binder =  binders.get(i);
        CustomView customView = viewHolder.view;
        binder.loadImage(customView.getImageView());

        customView.setOriginalColor(binder.getOriginalColor());
        customView.getBottomBar().setBackgroundColor(binder.getOriginalColor());

        customView.setChangedColor(binder.getChangedColor());

        customView.setOriginalText(binder.getOriginalText());
        customView.getTitle().setText(binder.getOriginalText());

        customView.setChangedText(binder.getChangedText());

        register(customView);
        return view;
    }

    public void setBinders(List<CustomDataBinder> binders){
        if(binders == null){
            return;
        }
        this.binders.clear();
        this.binders.addAll(binders);
        notifyDataSetChanged();
    }

    public void recover(){
        for(CustomAdapter.CustomView customView : customViews){
            customView.getTitle().setText(customView.getOriginalText());
            customView.getBottomBar().setBackgroundColor(customView.getOriginalColor());
        }
    }

    public void register(CustomAdapter.CustomView customView){
        if(customView != null && customViews.contains(customView) == false){
            customViews.add(customView);
        }
    }

    public void unregister(CustomAdapter.CustomView customView){
        if(customView != null && customViews.contains(customView) == true){
            customViews.remove(customView);
        }
    }

    public void start(final int countTime) {
        if (asyncTask == null) {
            asyncTask = new AsyncTask<Void, Void, Void>() {
                @Override
                protected Void doInBackground(Void... voids) {
                    try {
                        Thread.sleep(countTime * 1000);
                    } catch (InterruptedException e) {
                    }
                    return null;
                }

                @Override
                protected void onPostExecute(Void aVoid) {
                    super.onPostExecute(aVoid);
                    for(CustomAdapter.CustomView customView : customViews){
                        customView.getTitle().setText(customView.getChangedText());
                        customView.getBottomBar().setBackgroundColor(customView.getChangedColor());
                    }
                    asyncTask = null;
                }

                @Override
                protected void onCancelled() {
                    super.onCancelled();
                    asyncTask = null;
                }
            };

            asyncTask.execute();
        } else {
            asyncTask.cancel(true);
            asyncTask = null;
        }

    }

}

MainActivity.java

package tw.com.arnold_lin.customlistview;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.util.Log;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ListView;

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;

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

public class MainActivity extends Activity implements AbsListView.OnScrollListener{

    private ImageLoader imageLoader = ImageLoader.getInstance();
    private ListView listView ;
    private CustomAdapter adapter;
    public static final DisplayImageOptions.Builder displayImageOptionsBuilder  = new DisplayImageOptions.Builder()
//                .cacheInMemory(true)
//                .considerExifParams(true)
            .showImageOnFail(R.mipmap.ic_launcher)
//            .showImageOnFail(R.drawable.nicemdm_logo_)
            .cacheOnDisk(true)
            .cacheInMemory(true)
            .showImageForEmptyUri(R.mipmap.ic_launcher)
//            .showImageForEmptyUri(R.drawable.nicemdm_logo_)
            .imageScaleType(ImageScaleType.EXACTLY)
            .bitmapConfig(Bitmap.Config.ARGB_8888);

    public static final DisplayImageOptions displayImageOptions = displayImageOptionsBuilder.build();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(getApplicationContext()).build();
        if(!imageLoader.isInited()){
            imageLoader.init(configuration);
        }

        listView = new ListView(this);
        listView.setOnScrollListener(this);
        listView.setDividerHeight(20);
        listView.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        setContentView(listView);

        adapter = new CustomAdapter(this);
        listView.setAdapter(adapter);

        getTestData();
        start();
    }

    private void getTestData(){
        List<CustomAdapter.CustomDataBinder> binders = new ArrayList<>();

        final int o_color = getResources().getColor(android.R.color.holo_green_dark);
        final int c_color = getResources().getColor(android.R.color.holo_red_dark);

        for(int i = 0 ; i < 10 ; i++){
            final int count = i;
            CustomAdapter.CustomDataBinder binder = new CustomAdapter.CustomDataBinder() {
                @Override
                public void loadImage(ImageView imageView) {
                    imageLoader.displayImage("http://get.aca.ntu.edu.tw/getcdb/retrieve/331220/099_0089_251.png", imageView, displayImageOptions);
                }

                @Override
                public String getOriginalText() {
                    return "OriginalText " + count;
                }

                @Override
                public String getChangedText() {
                    return "ChangedText " + count;
                }

                @Override
                public int getOriginalColor() {
                    return o_color;
                }

                @Override
                public int getChangedColor() {
                    return c_color;
                }

            };

            binders.add(binder);

        }

        adapter.setBinders(binders);

    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        Log.d("AbsListView Listener", "firstVisibleItem : " + firstVisibleItem);
        int position = firstVisibleItem;
        Log.d("AbsListView Listener",""+position);

//        TimeController.getInstance().start(1);
//        boolean loadMore = /* maybe add a padding */
//                firstVisibleItem + visibleItemCount >= totalItemCount;
//
//        Log.d("AbsListView Listener",""+loadMore);
//
//        if(loadMore) {
//            adapter_style.addDynamicCount(visibleItemCount);
//        }
    }

    @Override
    public void onScrollStateChanged(AbsListView absListView, int i) {
        Log.d("onScrollStateChanged",""+i);
        switch (i){
            case 0:
                start();
                break;
            case 1:
                adapter.recover();
                break;
            case 2:
                break;

        }
    }

    private void start(){
        adapter.start(5);
    }
}