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Android 自定義ListView + Gallery 組合

日期：2017/3/1 10:11:52 编辑：Linux編程

效果如圖: Item項包含標題、描述及一個Gallery.

主配置文件(main):

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView android:id="@+id/my_lst" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="@drawable/bac"
android:divider="@color/snow" android:dividerHeight="1dip"
android:cacheColorHint="#00000000">
</ListView>
</LinearLayout>

ListView 的Item配置文件(items):

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@+id/items"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/item_title" android:layout_width="wrap_content"
android:textSize="20dip" android:layout_height="wrap_content"
android:textColor="@color/snow" android:layout_marginLeft="10dip"
android:layout_alignParentLeft="true" android:gravity="bottom" />
<TextView android:id="@+id/item_describe" android:textColor="@color/snow"
android:layout_width="wrap_content" android:textSize="15dip"
android:layout_marginTop="5dip" android:layout_height="wrap_content"
android:layout_marginLeft="20dip" android:layout_toRightOf="@+id/item_title"
android:gravity="bottom" />
<Gallery android:id="@+id/item_gallery" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:spacing="10dip"
android:layout_below="@+id/item_title" android:layout_marginTop="20dip"
android:layout_marginBottom="20dip" />
</RelativeLayout>

values文件夾下colors.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="white">#ffffff</color>
<color name="snow">#fffafa</color>
<color name="silver">#c0c0c0</color>
<color name="blue">#0000FF</color>
<color name="skyblue">#87ceeb</color>
<color name="darkgrey">#a9a9a9</color>
</resources>

JavaBean(ListItem),對應到每一項ListView的item項:

package com.march.view;
import java.io.InputStream;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
public class ListItem {
public String title, describe;
public int[] itemImages;
public ImageAdapter adapter;
public void initAdapter(Context context) {
this.adapter = new ImageAdapter(context);
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context context) {
this.mContext = context;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return Integer.MAX_VALUE;
}
@Override
public Object getItem(int i) {
// TODO Auto-generated method stub
return i;
}
@Override
public long getItemId(int i) {
// TODO Auto-generated method stub
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewgroup) {
view = new ImageView(mContext);
((ImageView) view).setImageBitmap(ListItem.readBitmap(mContext,
itemImages[i % itemImages.length]));
return view;
}
}
/***
* 以最省內存的方式讀取本地資源的圖片
*
* @param context
* @param resId
* @return
*/
public static Bitmap readBitmap(Context context, int rid) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.RGB_565;
options.inPurgeable = true;
options.inInputShareable = true;
// 獲取資源圖片
InputStream is = context.getResources().openRawResource(rid);
return BitmapFactory.decodeStream(is, null, options);
}
}

MainActivity,展示界面

package com.march.view;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ListView;
import android.widget.TextView;
import com.march.define.R;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
private ListView myLst;
private List<ListItem> items = new ArrayList<ListItem>();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myLst = (ListView) findViewById(R.id.my_lst);
initItems();
myLst.setAdapter(new CustomSimpleAdapter(this, items));
}
//默認數據,可修改
private static final String[] titles = new String[] { "title one",
"title two", "title three", "title four", "title five", "title six" };
private static final String[] describes = new String[] { "describe one",
"describe two", "describe three", "describe four", "describe five",
"describe six" };
private static final int[] images = new int[] { R.drawable.first,
R.drawable.second, R.drawable.three, R.drawable.four,
R.drawable.five, R.drawable.six };
private void initItems() {
// 初始化6個ListItem項
ListItem item = null;
for (int i = 0; i < 6; i++) {
item = new ListItem();
item.title = titles[i];
item.describe = describes[i];
item.itemImages = images;
item.initAdapter(this);
items.add(item);
}
}
public class CustomSimpleAdapter extends BaseAdapter {
private List<ListItem> items;
private LayoutInflater layoutInflater;
public CustomSimpleAdapter(Context context, List<ListItem> items) {
// TODO Auto-generated constructor stub
this.items = items;
layoutInflater = (LayoutInflater) ((Activity) context)
.getSystemService(LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return items.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
//if (null == convertView) {
convertView = layoutInflater.inflate(R.layout.items, null);
ListItem item = this.items.get(position);
TextView title = (TextView) convertView
.findViewById(R.id.item_title);
title.setText(item.title);
TextView describe = (TextView) convertView
.findViewById(R.id.item_describe);
describe.setText(item.describe);
Gallery gallery = (Gallery) convertView
.findViewById(R.id.item_gallery);
gallery.setAdapter(item.adapter);
gallery.setSelection(Integer.MAX_VALUE / 2);
convertView.setTag(convertView);
/*} else {
convertView = (View) convertView.getTag();
Log.i("test", "go here convertView");
}*/
return convertView;
}
}
}