效果如下:
布局文件activity_main.xml如下:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
< RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:tools = "http://schemas.android.com/tools" android:layout_width = "match_parent" android:layout_height = "match_parent" android:paddingBottom = "@dimen/activity_vertical_margin" android:paddingLeft = "@dimen/activity_horizontal_margin" android:paddingRight = "@dimen/activity_horizontal_margin" android:paddingTop = "@dimen/activity_vertical_margin" tools:context = ".MainActivity" > < ImageSwitcher android:id = "@+id/imageSwitcher" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_weight = "2" android:paddingTop = "30px" > </ ImageSwitcher > < Gallery android:id = "@+id/gallery1" android:layout_width = "match_parent" android:layout_height = "wrap_content" android:layout_weight = "1" android:spacing = "5px" android:unselectedAlpha = "0.6" /> </ RelativeLayout > |
MainActivity.java代码如下:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
import android.app.ActionBar.LayoutParams; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.animation.AnimationUtils; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.Gallery; import android.widget.ImageSwitcher; import android.widget.ImageView; import android.widget.ViewSwitcher.ViewFactory; public class MainActivity extends Activity { private int imageId[] = new int [] { R.drawable.a, R.drawable.b, R.drawable.c, R.drawable.d, R.drawable.e, R.drawable.f, R.drawable.g, R.drawable.h, R.drawable.i, R.drawable.j, R.drawable.k }; private ImageSwitcher imageSwitcher; private Gallery gallery; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); imageSwitcher = (ImageSwitcher) this .findViewById(R.id.imageSwitcher); gallery = (Gallery) this .findViewById(R.id.gallery1); // 设置动画效果 imageSwitcher.setInAnimation(AnimationUtils.loadAnimation( this , android.R.anim.fade_in)); imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation( this , android.R.anim.fade_out)); imageSwitcher.setFactory( new ViewFactory() { @Override public View makeView() { ImageView imageView = new ImageView(MainActivity. this ); imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); // 设置保持纵横比居中 imageView.setLayoutParams( new ImageSwitcher.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); return imageView; } }); GalleryAdapter adapter = new GalleryAdapter(MainActivity. this ,imageId); gallery.setAdapter(adapter); gallery.setSelection(imageId.length / 2 ); gallery.setOnItemSelectedListener( new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { imageSwitcher.setImageResource(imageId[position]); } @Override public void onNothingSelected(AdapterView<?> arg0) { } }); } } |
其中需要的一个适配器:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
import android.content.Context; import android.content.res.TypedArray; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Gallery; import android.widget.ImageView; public class GalleryAdapter extends BaseAdapter { private int [] imageId; private Context mContext; /** * 穿入上下文和图片资源数组 * @param mContext * @param imageId */ public GalleryAdapter(Context mContext, int [] imageId) { this .mContext = mContext; this .imageId = imageId; } @Override public int getCount() { return imageId.length; } @Override public Object getItem( int position) { return imageId[position]; } @Override public long getItemId( int position) { return position; } @Override public View getView( int position, View convertView, ViewGroup parent) { ImageView imageView1; if (convertView == null ) { imageView1 = new ImageView(mContext); imageView1.setScaleType(ImageView.ScaleType.FIT_XY); imageView1.setLayoutParams( new Gallery.LayoutParams( 180 , 135 )); TypedArray typedArray = mContext .obtainStyledAttributes(R.styleable.Gallery); imageView1.setBackgroundResource(typedArray.getResourceId( R.styleable.Gallery_android_galleryItemBackground, 0 )); imageView1.setPadding( 5 , 0 , 5 , 0 ); // 设置ImageView的内边距 } else { imageView1 = (ImageView) convertView; } imageView1.setImageResource(imageId[position]); // 为ImageView设置要显示的图片 return imageView1; // 返回ImageView } } |
到此 OK!
总结
以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作具有一定的参考学习价值,谢谢大家对服务器之家的支持。如果你想了解更多相关内容请查看下面相关链接
原文链接:https://blog.csdn.net/xlgen157387/article/details/45969277