Android(安卓)GridView控件 使用
16lz
2021-01-26
Android的GridView控件用于把一系列的空间组织成一个二维的网格显示出来应用的比较多的就是组合图片显示下面我就详细讲一个例子
首先写一个类继承BaseAdapt
代码片段(3)
[代码][Java]代码
01 | packagecom.yarin.android.Examples_04_19; |
02 |
03 | importandroid.content.Context; |
04 | importandroid.view.View; |
05 | importandroid.view.ViewGroup; |
06 | importandroid.widget.BaseAdapter; |
07 | importandroid.widget.GridView; |
08 | importandroid.widget.ImageView; |
09 |
10 | publicclassImageAdapterextendsBaseAdapter |
11 | { |
12 | // 定义Context |
13 | privateContext mContext; |
14 | // 定义整型数组 即图片源 |
15 | privateInteger[] mImageIds = |
16 | { |
17 | R.drawable.img1, |
18 | R.drawable.img2, |
19 | R.drawable.img3, |
20 | R.drawable.img4, |
21 | R.drawable.img5, |
22 | R.drawable.img6, |
23 | R.drawable.img7, |
24 | R.drawable.img8, |
25 | R.drawable.img1, |
26 | }; |
27 |
28 | publicImageAdapter(Context c) |
29 | { |
30 | mContext = c; |
31 | } |
32 |
33 | // 获取图片的个数 |
34 | publicintgetCount() |
35 | { |
36 | returnmImageIds.length; |
37 | } |
38 |
39 | // 获取图片在库中的位置 |
40 | publicObject getItem(intposition) |
41 | { |
42 | returnposition; |
43 | } |
44 |
45 |
46 | // 获取图片ID |
47 | publiclonggetItemId(intposition) |
48 | { |
49 | returnposition; |
50 | } |
51 |
52 |
53 | publicView getView(intposition, View convertView, ViewGroup parent) |
54 | { |
55 | ImageView imageView; |
56 | if(convertView ==null) |
57 | { |
58 | // 给ImageView设置资源 |
59 | imageView =newImageView(mContext); |
60 | // 设置布局 图片120×120显示 |
61 | imageView.setLayoutParams(newGridView.LayoutParams(85,85)); |
62 | // 设置显示比例类型 |
63 | imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); |
64 | } |
65 | else |
66 | { |
67 | imageView = (ImageView) convertView; |
68 | } |
69 |
70 | imageView.setImageResource(mImageIds[position]); |
71 | returnimageView; |
72 | } |
73 |
74 | } |
[代码][Java]代码
01 | packagecom.yarin.android.Examples_04_19; |
02 |
03 | importandroid.app.Activity; |
04 | importandroid.os.Bundle; |
05 | importandroid.view.View; |
06 | importandroid.widget.AdapterView; |
07 | importandroid.widget.GridView; |
08 | importandroid.widget.Toast; |
09 | importandroid.widget.AdapterView.OnItemClickListener; |
10 |
11 | publicclassActivity01extendsActivity |
12 | { |
13 | /** Called when the activity is first created. */ |
14 | @Override |
15 | publicvoidonCreate(Bundle savedInstanceState) |
16 | { |
17 | super.onCreate(savedInstanceState); |
18 | setContentView(R.layout.main); |
19 |
20 | //取得GridView对象 |
21 | GridView gridview = (GridView) findViewById(R.id.gridview); |
22 | //添加元素给gridview |
23 | gridview.setAdapter(newImageAdapter(this)); |
24 |
25 | // 设置Gallery的背景 |
26 | gridview.setBackgroundResource(R.drawable.bg0); |
27 |
28 | //事件监听 |
29 | gridview.setOnItemClickListener(newOnItemClickListener() { |
30 | publicvoidonItemClick(AdapterView<?> parent, View v,intposition,longid) |
31 | { |
32 | Toast.makeText(Activity01.this,"你选择了"+ (position +1) +" 号图片", Toast.LENGTH_SHORT).show(); |
33 | } |
34 | }); |
35 | } |
36 | } |
[代码][XML]代码
view source print ?01 | <?xmlversion="1.0"encoding="utf-8"?> |
02 | <GridViewxmlns:android="http://schemas.android.com/apk/res/android" |
03 | android:id="@+id/gridview" |
04 | android:layout_width="fill_parent" |
05 | android:layout_height="fill_parent" |
06 | android:numColumns="auto_fit" |
07 | android:verticalSpacing="10dp" |
08 | android:horizontalSpacing="10dp" |
09 | android:columnWidth="90dp" |
10 | android:stretchMode="columnWidth" |
11 | android:gravity="center" |
12 | /> |
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