android用戶界面-組件Widget-畫廊視圖Gallery

Android的Gallery控件是個很不錯的看圖控件，大大減輕了開發者對於看圖功能的開發，而且效果也比較美觀。

/Chapter04_UI_Gallery01/src/com/amaker/test/MainActivity.java

package com.amaker.test;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    //創建時被調用
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Gallery g = (Gallery) findViewById(R.id.Gallery01);
        
        g.setAdapter(new MyAdapter(this));
    }
    
    class MyAdapter extends BaseAdapter{
        Context context;
        MyAdapter(Context context){
            this.context = context;
        }
        private Integer[] imgs = {
                R.drawable.gallery_photo_1,
                R.drawable.gallery_photo_2,
                R.drawable.gallery_photo_3,
                R.drawable.gallery_photo_4,
                R.drawable.gallery_photo_5,
                R.drawable.gallery_photo_6,
                R.drawable.gallery_photo_7,
                R.drawable.gallery_photo_8,
                
                R.drawable.gallery_photo_1,
                R.drawable.gallery_photo_2,
                R.drawable.gallery_photo_3,
                R.drawable.gallery_photo_4,
                R.drawable.gallery_photo_5,
                R.drawable.gallery_photo_6,
                R.drawable.gallery_photo_7,
                R.drawable.gallery_photo_8
        };
        
        public int getCount() {
            return imgs.length;
        }

        public Object getItem(int item) {
            return item;
        }

        public long getItemId(int id) {
            return id;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
             ImageView imageView = new ImageView(context);
             imageView.setImageResource(imgs[position]);
             imageView.setScaleType(ImageView.ScaleType.FIT_XY);
             imageView.setLayoutParams(new Gallery.LayoutParams(136, 88));
                
             return imageView;
        }
        
    }
}

/Chapter04_UI_Gallery01/res/layout/main.xml

<?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"
    >

<Gallery 
android:id="@+id/Gallery01" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content">
</Gallery>

</LinearLayout>