Android pure java write Spinner, Android pure javaspinner

Android pure java write Spinner, Android pure javaspinner

 

 

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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;
7. Public class SpinnerTest extends Activity {
9. Private LinearLayout mainLayout = null;
10. Private TextView tv1 = null;
11. Private Spinner spinner1 = null;
12. Private TextView tv2 = null;
13. Private Spinner spinner2 = null;
14. Private TextView tv3 = null;
16. Public void onCreate (Bundle savedInstanceState ){
17. Super. onCreate (savedInstanceState );
18. MainLayout_init ();
19. SetContentView (mainLayout );
20. }
22. Void mainLayout_init (){
23. MainLayout = new LinearLayout (this );
24. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-1 );
25. MainLayout. setLayoutParams (lp );
26. MainLayout. setOrientation (LinearLayout. VERTICAL );
27. Tv1_init ();
28. MainLayout. addView (tv1 );
29. Spinner1_init ();
30. MainLayout. addView (spinner1 );
31. Tv2_init ();
32. MainLayout. addView (tv2 );
33. Spinner2_init ();
34. MainLayout. addView (spinner2 );
35. Tv3 = new TextView (this );
36. Tv3.setText ("display ");
37. MainLayout. addView (tv3 );
38. }
39. /* Initialize tv1 */
40. Void tv1_init (){
41. Tv1 = new TextView (this );
42. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-2 );
43. Tv1.setLayoutParams (lp );
44. Tv1.setText ("Spinner test ");
45. }
46. /* Initialize the spinner */
47. Void spinner1_init (){
48. Spinner1 = new Spinner (this );
49. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-2 );
50. Spinner1.setLayoutParams (lp );
51. Spinner1.setPrompt ("this is the title ");
52. String s [] = {"option 1", "option 2", "option 3 "};
53. ArrayAdapter <String> aa = new ArrayAdapter <String> (this, android. R. layout. simple_spinner_item, s );
54. // Set it to the drop-down Item format
55. Aa. setDropDownViewResource (android. R. layout. simple_spinner_dropdown_item );
56. Spinner1.setAdapter (aa );
57. // Add a listener
58. OnItemSelectedListener otsc = new OnItemSelectedListener (){
59. Public void onItemSelected (AdapterView <?> Arg0, View arg1, int arg2, long arg3 ){
60. Tv3.setText ("option" + String. valueOf (arg2 + 1) + "selected ");
61. }
62. Public void onNothingSelected (AdapterView <?> Arg0 ){
64. }
65. };
66. Spinner1.setOnItemSelectedListener (otsc );
67. }
68. /**/
69. Void tv2_init (){
70. Tv2 = new TextView (this );
71. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-2 );
72. Tv2.setLayoutParams (lp );
73. Tv2.setText ("Change style ");
74. }
75. /**/
76. Void spinner2_init (){
77. //
78. Spinner2 = new Spinner (this );
79. LinearLayout. LayoutParams lp = new LinearLayout. LayoutParams (-1,-2 );
80. Spinner2.setLayoutParams (lp );
81. // Spinner2.setPrompt ("this is the title ");
82. String s [] = {"option 1", "option 2", "option 3 "};
83. ArrayAdapter <String> aa = new ArrayAdapter <String> (this, android. R. layout. simple_spinner_item, s );
84. // Another style
85. Aa. setDropDownViewResource (android. R. layout. simple_spinner_item );
86. Spinner2.setAdapter (aa );
87. }
88. }