Android pure java write Spinner, Android pure javaspinner

Source: Internet
Author: User

Android pure java write Spinner, Android pure javaspinner

 

 

[Java]View plaincopy
  1. Import android. app. Activity;
  2. Import android. OS. Bundle;
  3. Import android. view. View;
  4. Import android. widget .*;
  5. Import android. widget. AdapterView. OnItemSelectedListener;
  6. Public class SpinnerTest extends Activity {
  7. Private LinearLayout mainLayout = null;
  8. Private TextView tv1 = null;
  9. Private Spinner spinner1 = null;
  10. Private TextView tv2 = null;
  11. Private Spinner spinner2 = null;
  12. Private TextView tv3 = null;
  13. Public void onCreate (Bundle savedInstanceState ){
  14. Super. onCreate (savedInstanceState );
  15. MainLayout_init ();
  16. SetContentView (mainLayout );
  17. }
  18. Void mainLayout_init (){
  19. MainLayout = new LinearLayout (this );
  20. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-1 );
  21. MainLayout. setLayoutParams (lp );
  22. MainLayout. setOrientation (LinearLayout. VERTICAL );
  23. Tv1_init ();
  24. MainLayout. addView (tv1 );
  25. Spinner1_init ();
  26. MainLayout. addView (spinner1 );
  27. Tv2_init ();
  28. MainLayout. addView (tv2 );
  29. Spinner2_init ();
  30. MainLayout. addView (spinner2 );
  31. Tv3 = new TextView (this );
  32. Tv3.setText ("display ");
  33. MainLayout. addView (tv3 );
  34. }
  35. /* Initialize tv1 */
  36. Void tv1_init (){
  37. Tv1 = new TextView (this );
  38. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-2 );
  39. Tv1.setLayoutParams (lp );
  40. Tv1.setText ("Spinner test ");
  41. }
  42. /* Initialize the spinner */
  43. Void spinner1_init (){
  44. Spinner1 = new Spinner (this );
  45. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-2 );
  46. Spinner1.setLayoutParams (lp );
  47. Spinner1.setPrompt ("this is the title ");
  48. String s [] = {"option 1", "option 2", "option 3 "};
  49. ArrayAdapter <String> aa = new ArrayAdapter <String> (this, android. R. layout. simple_spinner_item, s );
  50. // Set it to the drop-down Item format
  51. Aa. setDropDownViewResource (android. R. layout. simple_spinner_dropdown_item );
  52. Spinner1.setAdapter (aa );
  53. // Add a listener
  54. OnItemSelectedListener otsc = new OnItemSelectedListener (){
  55. Public void onItemSelected (AdapterView <?> Arg0, View arg1, int arg2, long arg3 ){
  56. Tv3.setText ("option" + String. valueOf (arg2 + 1) + "selected ");
  57. }
  58. Public void onNothingSelected (AdapterView <?> Arg0 ){
  59. }
  60. };
  61. Spinner1.setOnItemSelectedListener (otsc );
  62. }
  63. /**/
  64. Void tv2_init (){
  65. Tv2 = new TextView (this );
  66. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-2 );
  67. Tv2.setLayoutParams (lp );
  68. Tv2.setText ("Change style ");
  69. }
  70. /**/
  71. Void spinner2_init (){
  72. //
  73. Spinner2 = new Spinner (this );
  74. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-2 );
  75. Spinner2.setLayoutParams (lp );
  76. // Spinner2.setPrompt ("this is the title ");
  77. String s [] = {"option 1", "option 2", "option 3 "};
  78. ArrayAdapter <String> aa = new ArrayAdapter <String> (this, android. R. layout. simple_spinner_item, s );
  79. // Another style
  80. Aa. setDropDownViewResource (android. R. layout. simple_spinner_item );
  81. Spinner2.setAdapter (aa );
  82. }
  83. }

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