Activity01.java

package com.yarin.android.Examples_04_18;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ViewSwitcher.ViewFactory;

public class Activity01 extends Activity implements OnClickListener, ViewFactory {
    /* ����Ҫ��ʾ��ͼƬ��Դ���� */
    private static final Integer[] imagelist =
            {
                    R.drawable.img1,
                    R.drawable.img2,
                    R.drawable.img3,
                    R.drawable.img4,
                    R.drawable.img5,
                    R.drawable.img6,
                    R.drawable.img7,
                    R.drawable.img8,
            };

    //����ImageSwitcher����
    private ImageSwitcher m_Switcher;
    //����
    private static int index = 0;

    //����һҳ����ťID
    private static final int BUTTON_DWON_ID = 0x123456;
    //����һҳ����ťID
    private static final int BUTTON_UP_ID = 0x123457;
    //ImageSwitcher�����ID
    private static final int SWITCHER_ID = 0x123458;

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //����һ�����Բ���LinearLayout
        LinearLayout main_view = new LinearLayout(this);
        //����ImageSwitcher����
        m_Switcher = new ImageSwitcher(this);
        //�����Բ��������ImageSwitcher��ͼ
        main_view.addView(m_Switcher);
        //����ImageSwitcher�����ID
        m_Switcher.setId(SWITCHER_ID);
        //����ImageSwitcher���������Դ
        m_Switcher.setFactory(this);
        m_Switcher.setImageResource(imagelist[index]);

        //������ʾ���洴�������Բ���
        setContentView(main_view);

        //��������һ�š���ť
        Button next = new Button(this);
        next.setId(BUTTON_DWON_ID);
        next.setText("��һ��");
        next.setOnClickListener(this);
        LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(100, 100);
        main_view.addView(next, param);

        //��������һ�š���ť
        Button pre = new Button(this);
        pre.setId(BUTTON_UP_ID);
        pre.setText("��һ��");
        pre.setOnClickListener(this);
        main_view.addView(pre, param);

    }

    //�¼�����������
    public void onClick(View v) {
        switch (v.getId()) {
            //��һҳ
            case BUTTON_DWON_ID:
                index++;
                if (index >= imagelist.length) {
                    index = 0;
                }
                //ImageSwitcher������Դ����
                m_Switcher.setImageResource(imagelist[index]);
                break;
            //��һҳ
            case BUTTON_UP_ID:
                index--;
                if (index < 0) {
                    index = imagelist.length - 1;
                }
                //ImageSwitcher������Դ����
                m_Switcher.setImageResource(imagelist[index]);
                break;
            default:
                break;
        }
    }

    public View makeView() {
        //������ͼƬͨ��ImageView����ʾ
        return new ImageView(this);
    }
}