1 package com.example.adaptertest.gallery;
2
3 import android.app.Activity;
4 import android.os.Bundle;
5 import android.os.Handler;
6 import android.os.Handler.Callback;
7 import android.os.Message;
8 import android.view.View;
9 import android.widget.AdapterView;
10 import android.widget.AdapterView.OnItemClickListener;
11 import android.widget.AdapterView.OnItemSelectedListener;
12 import android.widget.Gallery;
13 import android.widget.Toast;
14
15 import com.example.adaptertest.R;
16
17 @SuppressWarnings("deprecation")
18 public class GalleryActivity extends Activity {
19 int[] images = { R.drawable.a1, R.drawable.a2, R.drawable.a3, R.drawable.a4 };
20 // 可以用AdapterViewFlipper替换
21 Gallery gallery;
22 int counter = 0;
23
24 @Override
25 protected void onCreate(Bundle savedInstanceState) {
26 super.onCreate(savedInstanceState);
27 setContentView(R.layout.gallerytest);
28
29 gallery = (Gallery) findViewById(R.id.gallery_id);
30 gallery.setAdapter(new GalleryAdapter(GalleryActivity.this, images));
31 handler.sendEmptyMessageDelayed(1, 5000);
32 // 得到gallery选中的item的ID
33 // gallery.getSelectedItemId();
34 gallery.setOnItemClickListener(new OnItemClickListener() {
35
36 @Override
37 public void onItemClick(AdapterView<?> parent, View view,
38 int position, long id) {
39 Toast.makeText(GalleryActivity.this, position + "",
40 Toast.LENGTH_LONG).show();
41 // 移除消息队列（点击图片事停止图片自动滚动）
42 handler.removeMessages(1);
43 }
44 });
45 // 最前端的图片
46 gallery.setOnItemSelectedListener(new OnItemSelectedListener() {
47
48 @Override
49 public void onItemSelected(AdapterView<?> parent, View view,
50 int position, long id) {
51 Toast.makeText(GalleryActivity.this, position + "",
52 Toast.LENGTH_LONG).show();
53
54 }
55
56 @Override
57 public void onNothingSelected(AdapterView<?> parent) {
58 Toast.makeText(GalleryActivity.this, "nothing",
59 Toast.LENGTH_LONG).show();
60 }
61 });
62
63 }
64
65 Handler handler = new Handler(new Callback() {
66
67 @Override
68 public boolean handleMessage(Message msg) {
69 if (msg.what == 1) {
70 counter++;
71 if (counter >= images.length) {
72 counter = 0;
73 }
74 // 更换图片
75 gallery.setSelection(counter);
76 // 继续发送消息到队列（类似递归）
77 handler.sendEmptyMessageDelayed(1, 5000);
78 }
79 return true;
80 }
81 });
82 }
package com.example.adaptertest.gallery;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class GalleryAdapter extends BaseAdapter {
private int[] images;
private Context context;
public GalleryAdapter(Context convertView, int[] images) {
this.context = convertView;
this.images = images;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return images.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return images[position];
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@SuppressWarnings("deprecation")
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ImageView imageView = new ImageView(context);
imageView.setImageResource(images[position]);
imageView.setScaleType(ScaleType.FIT_XY);
imageView.setLayoutParams(new Gallery.LayoutParams(500, 500));
return imageView;
}
}
1 <?xml version="1.0" encoding="utf-8"?>
2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3 android:layout_width="match_parent"
4 android:layout_height="match_parent"
5 android:orientation="vertical" >
6
7 <Gallery
8 android:id="@+id/gallery_id"
9 android:layout_width="wrap_content"
10 android:layout_height="wrap_content"
11 android:spacing="-20px"
12 android:unselectedAlpha="150" />
13
14 </LinearLayout>
15 <!-- android:unselectedAlpha="150" 未被选择的图片的透明度 -->
16 <!-- android:spacing="-20px" 间隔 -->
