GridView按照行列的方式来显示内容。一般适合显示图标。图片等内容，主要用于设置Adapter。

通过基础类BaseAdapter类，重写getView()方法来设置图片显示格式。

/Chapter04_UI_GridView01/src/com/amaker/test/MainActivity.java

        
                
  1. 代码 
    2.             
    3.             
  3. packagecom.amaker.test; 
    4.             
    5.             
  5. importandroid.app.Activity; 
    6.             
  6. importandroid.content.Context; 
    7.             
  7. importandroid.os.Bundle; 
    8.             
  8. importandroid.view.View; 
    9.             
  9. importandroid.view.ViewGroup; 
    10.             
  10. importandroid.widget.BaseAdapter; 
    11.             
  11. importandroid.widget.GridView; 
    12.             
  12. importandroid.widget.ImageView; 
    13.             
    14.             
  14. publicclassMainActivityextendsActivity{ 
    15.             
  15. privateGridViewgv; 
    16.             
  16.  
    17.             
  17. @Override
    18.             
  18. publicvoidonCreate(BundlesavedInstanceState){ 
    19.             
  19. super.onCreate(savedInstanceState); 
    20.             
  20. setContentView(R.layout.main); 
    21.             
  21. gv=(GridView)findViewById(R.id.GridView01); 
    22.             
  22. gv.setNumColumns(4); 
    23.             
  23. //gv.setNumColumns(3); 
    24.             
  24. //String[]strs={"a","a1","a2","b","b1","b2","c","c1","c2"}; 
    25.             
  25. //ArrayAdapter<String>adapter=newArrayAdapter<String>(this,android.R.layout.simple_gallery_item,strs); 
    26.             
  26. gv.setAdapter(newMyAdapter(this)); 
    27.             
  27.  
    28.             
  28. } 
    29.             
  29.  
    30.             
  30. classMyAdapterextendsBaseAdapter{ 
    31.             
  31.  
    32.             
  32. privateInteger[]imgs={ 
    33.             
  33. R.drawable.gallery_photo_1, 
    34.             
  34. R.drawable.gallery_photo_2, 
    35.             
  35. R.drawable.gallery_photo_3, 
    36.             
  36. R.drawable.gallery_photo_4, 
    37.             
  37. R.drawable.gallery_photo_5, 
    38.             
  38. R.drawable.gallery_photo_6, 
    39.             
  39. R.drawable.gallery_photo_7, 
    40.             
  40. R.drawable.gallery_photo_8, 
    41.             
  41.  
    42.             
  42. R.drawable.gallery_photo_1, 
    43.             
  43. R.drawable.gallery_photo_2, 
    44.             
  44. R.drawable.gallery_photo_3, 
    45.             
  45. R.drawable.gallery_photo_4, 
    46.             
  46. R.drawable.gallery_photo_5, 
    47.             
  47. R.drawable.gallery_photo_6, 
    48.             
  48. R.drawable.gallery_photo_7, 
    49.             
  49. R.drawable.gallery_photo_8 
    50.             
  50. }; 
    51.             
  51. Contextcontext; 
    52.             
  52. MyAdapter(Contextcontext){ 
    53.             
  53. this.context=context; 
    54.             
  54. } 
    55.             
  55. publicintgetCount(){ 
    56.             
  56. returnimgs.length; 
    57.             
  57. } 
    58.             
    59.             
  59. publicObjectgetItem(intitem){ 
    60.             
  60. returnitem; 
    61.             
  61. } 
    62.             
    63.             
  63. publiclonggetItemId(intid){ 
    64.             
  64. returnid; 
    65.             
  65. } 
    66.             
    67.             
  67. publicViewgetView(intposition,ViewconvertView,ViewGroupparent){ 
    68.             
  68. ImageViewimageView; 
    69.             
  69. if(convertView==null){ 
    70.             
  70. imageView=newImageView(context); 
    71.             
  71. imageView.setLayoutParams(newGridView.LayoutParams(45,45)); 
    72.             
  72. imageView.setAdjustViewBounds(false); 
    73.             
  73. imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
    74.             
  74. imageView.setPadding(8,8,8,8); 
    75.             
  75. }else{ 
    76.             
  76. imageView=(ImageView)convertView; 
    77.             
  77. } 
    78.             
  78. imageView.setImageResource(imgs[position]); 
    79.             
  79. returnimageView; 
    80.             
  80. } 
    81.             
  81. } 
    82.             
  82. }
    83.

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