gridview是一项显示二维的viewgroup，可滚动的网格。网格项时自动插入的布局使用listadapter。
1.创建一个新的项目:gridview.
2,打开 res/layout/main.xml文件,插入一下代码:
1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="vertical"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. >
7. <GridView
8. android:id="@+id/gridview"
9. android:layout_width="fill_parent"
10. android:layout_height="fill_parent"
11. android:columnWidth="90dp"
12. android:numColumns="auto_fit"
13. android:verticalSpacing="10dp"
14. android:horizontalSpacing="10dp"
15. android:stretchMode="columnWidth"
16. android:gravity="center"
17. />
18. </LinearLayout>
做好以后就可以在屏幕上显示一个grid view
3.打开gridview.java首先要导入包:
1. package cn.gridview;
2. import android.widget.GridView;
3. import android.widget.Toast;
4. import android.app.Activity;
5. import android.os.Bundle;
6. import android.widget.AdapterView.OnItemClickListener;
7. import android.widget.AdapterView;
8. import android.view.View;
9. 在onCreate添加方法:
10. public void onCreate(Bundle savedInstanceState) {
11. super.onCreate(savedInstanceState);
12. setContentView(R.layout.main);
13. GridView gridview=(GridView)findViewById(R.id.gridview);//找到main.xml中定义gridview 的id
14. gridview.setAdapter(new ImageAdapter(this));//调用ImageAdapter.java
15. gridview.setOnItemClickListener(new OnItemClickListener(){//监听事件
16. public void onItemClick(AdapterView<?> parent, View view, int position, long id)
17. {
18. Toast.makeText(gridview.this, ""+position,Toast.LENGTH_SHORT).show();//显示信息;
19. }
20. });
21. }
22. ImageAdapter.java
23. package cn.gridview;
24. import android.view.View;
25. import android.view.ViewGroup;
26. import android.widget.BaseAdapter;
27. import android.content.Context;
28. import android.widget.ImageView;
29. import android.widget.GridView;
30. public class ImageAdapter extends BaseAdapter {
31. private Context mContext;
32.
33. public ImageAdapter(Context c)
34. {
35. mContext=c;
36. }
37. @Override
38. public int getCount() {
39. // TODO Auto-generated method stub
40. return mThumbIds.length;
41. }
42. @Override
43. public Object getItem(int position) {
44. // TODO Auto-generated method stub
45. return null;
46. }
47. @Override
48. public long getItemId(int position) {
49. // TODO Auto-generated method stub
50. return 0;
51. }
52. @Override
53. public View getView(int position, View convertView, ViewGroup parent) {
54. // TODO Auto-generated method stub
55.
56. ImageView imageview;
57. if(convertView==null)
58. {
59. imageview=new ImageView(mContext);
60. imageview.setLayoutParams(new GridView.LayoutParams(85, 85));
61. imageview.setScaleType(ImageView.ScaleType.CENTER_CROP);
62. imageview.setPadding(8,8,8,8);
63. }
64. else
65. {
66. imageview=(ImageView) convertView;
67. }
68. imageview.setImageResource(mThumbIds[position]);
69. return imageview;
70. }
71. private Integer[] mThumbIds={//显示的图片数组
72. R.drawable.sample_2,R.drawable.sample_3,
73. R.drawable.sample_4,R.drawable.sample_5,
74. R.drawable.sample_6,R.drawable.sample_7,
75. R.drawable.sample_0,R.drawable.sample_1,
76. R.drawable.sample_2,R.drawable.sample_3,
77. R.drawable.sample_4,R.drawable.sample_5,
78. R.drawable.sample_6,R.drawable.sample_7,
79. R.drawable.sample_0,R.drawable.sample_1,
80. R.drawable.sample_2,R.drawable.sample_3,
81. R.drawable.sample_4,R.drawable.sample_5,
82. R.drawable.sample_6,R.drawable.sample_7,
83. };
84. }
